Now get your butt out there and build yourself an engine young fellah. You kids these days, they just dont do anything unless someone is there to push them.
I always go back to this video because of how well everything is explained. There are a lot of people have this knowledge but not many people who can teach and explain it in such a way that the concepts are easily understood. Brilliant.
I've been watching videos on UA-cam since it began. I can say, with 100% certainty, that this is the most well thought out, perfectly executed, easy to understand, vastly informative, instructional, and motivational video I've seen to date. You rock dude. Dead serious. Thank you very much!
This is information that the old timers kept secret when I was a kid. I had the fundamentals of how this worked before, but these essential details are priceless. I've been building engines here and there since I was 16, so 27 years. I have come close but having known this I could have nailed it so much easier than assembling, driving, adjusting, deciding to swap or modify parts to get what I wanted out of the engine, on and on... I used to try to get help like this from my step Dad, my Uncles, etc...they would NEVER tell me about this stuff. Thank you SO much for this. I'm working on an old 350 in my square body right now and will be utilizing this info and rewatching this many times. More upsetting is knowing that people I asked KNEW this and just treated me like I was stupid because I didn't know what I didn't know. I knew I was missing something and this was it - the MATH. SUBBED - thanks again!
This is hands down the best channel on UA-cam related to engine building. I’ve learned a lot but more importantly it’s helped me do all my own work and build my motor
Hence why there's only 90k subs.... A majority of the auto enthusiast community "wish" they had what it takes but only about 10% have the capacity to actually learn and retain information to be dominant in their platforms.
I'm glad you couldn't find a explanatory video on camshaft selection. You did an excellent job. I even took notes. Thank you for taking the time, you helped a lot of people.
I have a 1970 mercury cougar with a 351 Windsor. Some years back I port matched the intake and exhaust ports, cleaned up the bowls, and ground out the EGR bumps. Put a set of Hooker headers and dual exhaust on the old girl. At 50 mph I had a severe lean misfire. I drilled the main jets out .010" that were in the stock 2 barrel carb, advanced the timing a few degrees with the stock distributor. What a street performer! No change with the camshaft.
Something told me to have my notebook ready...glad I listened to "something" and I'll still watch again! Nice job & greatly appreciated...you're a natural teacher and that makes All the difference. I hope it's very gratifying for you to see how many people are positively affected by your efforts. Thanks!
Why is this not the first video to pop up when searching about basic cam information…. Literally everything you need to know compiled Into one video. People with attention span issues who are visual learners appreciate the effort you put into this video. Everything I needed to finish building this striker for my elco
I thought I knew how to pick a cam based on intended use. I never realized about matching cylinder head flow to cam lift. After watching this I went and found the flow sheet for the cylinder heads on the 383 I'm building. I was going to install higher ratio rockers for more lift but decided that stock ratio with the springs I installed might offer a little more engine life. It turns out that the cam that I accidently stumbled upon matches my cylinder heads perfectly as he described. Thanks for another great vid. Totally made my day! Lol
I wish you were my autoshop teacher in high school. I've learned more in 49 minutes, than I learned in 2 yrs of autoshop. You're correct in the video, no one teaches you this stuff.
I'm finding this GEM 3 years after you dropped it here and I appreciate you so much for it! This was great. Your video answered my original question and then some. Thank you for this!
Mate ive been in this game for the last 30 years. Ive listened to alot of guys regurgitate what someone else has told them or what they have misinterpreted from reading text that they dont totally get or understand the concepts of head and cam design . That was by far the best lecture on valvetrain fundermentals ive ever listened to. Some topics i wasnt sure on were confirmed by you just now. Thankyou. Im subscribing to the channel right now
You are an invaluable asset to anyone learning the mechanics of the gasoline engine. I've built/cammed more than a few so this was mainly a review......BUT, I learned something. As far as a "cool sounding engine".....I agree....we all love them. However, that said, reversion thru the engine loses power if you don't find a way to 'ram' the mix back down into the cylinder. When I was working with a Cosworth Vega engine that I was using Webers for carbs, I worked hard to get the a carb stack that would contain the fuel mist and be proper length for the rpm/torque/hp that we were looking for from that engine. Short stacks/high rev hp..long stacks/more torque. I had a bit wider parameters as the 122 cubic inch motor had been shown to be able to rev to 10,000 rpm with the right cams. Fun stuff. The whole thing is that the individual components better be able to "shake hands" and work together as a whole. Again....great VIDEO.
THANK YOU! As a noob, I REALLY appreciate your easy-to-follow explanation of the fundamentals. No guessing on my next cam. You helped me save money and avoid unexpected/disappointing results.
Check into David Vizard Powertec 10 videos. He has a couple on cam selection that deserve paying attention to. I understand the statement about a more efficient port being compatible with a wider LSA for a smoother idle. Every video or book has useful.bits of information. Pay attention and consider all the information. Sometimes a combining of that information will be best. For a restrictive exhaust port, finish the seat angle at 40° as this will aid low lift flow. Also consider a higher ratio set of rocker arms. This gets the valve off the seat quicker and closes quicker. This also aids low lift flow. A single pattern cam tends to make more torque, provided decent ports. These two things enable use of a single pattern cam, or a cam with less split between the intake and exhaust.
Hands down, best video I’ve seen on camshaft and cylinder head fundamentals! The way you teach makes this so understandable, I will be reverting back to this vehicle when it comes time to build up my Monte Carlo. Thank you for taking time to make this video.
Excellent video. Thank you for taking the time to put this together. Now I feel better equipped to answer the questions when I call to spec a cam for my style of use.
Watched this vid, and I will watch it again, and probably then some more. Not only because it's hands down the most comprehensive explanation of this subject but also because you are massively engaging. Thanks man
This is great. I'm glad you revisited this and added more detail. I used your original videos as gospel when i was building my truck engine and I highly recommend everyone to your videos who are asking about cam selection.
Awesome description of the basic fundamentals of obtaining HP. Thanks for your time in putting this together will assist me greatly with my little Holden 6
Very good info indeed. Love the demystification of LSA Especially how it relates to OBD2 controlled engines. The head flow number analysis was certainly the icing on the cake! Thanks a million.
I've been a fan of yours since I ran across the video of you rebuilding the GMC BIG BLOCK 305 V6 SEVERAL YEARS AGO!!! I THOROUGHLY ENJOYED THOSE VIDEOS,, BECAUSE I'M A FAN OF THAT BIG V6,, MY 66 GMC STEPSIDE HAD ONE IN IT,,, YES HAD ONE AND STUPID ME RAN SOME FLUSH FLUID THROUGH IT AND FORGOT IT HAD THE HIGH VOLUME OIL PUMP,,, AND THEREFORE STOPPED THE SCREEN UP AND SPUN A ROD,,, I KNOW OF ANOTHER ONE NOT FAR FROM ME I'M GOING TO LATCH ONTO AND IF I REBUILD IT,, YOUR VIDEO WILL BE THE GO TO VIDEO!!! THANK YOU FOR DOING THAT,,, A WHOLE LOT OF PEOPLE DON'T KNOW GMC BUILT A BIG V6!!! AND THAT SURE WAS A SWEET RUNNING ENGINE WHEN YOU WERE DONE,,,, YOUR THE MAN!!! A GREAT INSTRUCTOR!!
If you do not have a bench flow measuring device you can always use a shop vac and an amp clamp with a multimeter to at least find out how each port performs vs the others. Lower the amperage, lower your flow. Put the shop vac hose on the combustion side of the valve and then you can get your different lift amounts against your different amperage draws. Edit: this works best for trying to make sure you have equal CFM through each cylinder when porting and polishing. It can help prevent severe unbalance between cylinders. It is just a DIY means of comparing.
Hey this guy is definitely one of koolest, in depth teacher I’ve come across. I’ve seen a lot of so call teachers trying to explain, but not even close. I really appreciate the knowledge your share to the world, and theirs so many out that would not share this information. Thank you so much!! I will always support your channel.
This has been the most helpful and effective explanation I have ever heard. And was in thought of building a 347 stoker. Blown away by your examples. Will keep tuning in for new videos
Myvintageiron between you and Pete's garage you've both have given me the confidence to learn and build my 350 engine. I would like to say thank you for sharing your knowledge I truly appreciate your help and advice . You are a blessing to this 55 year's old man . I'm forever greatful. Blessings and more Blessings to you and your Family 🤗👌
myvintageiron7512 has given me confidence to build my own 350 as well and I am 74 yrs old. I have never fooled with anything in the way of motors before!!!
@@KingJT80 negative his theory is every camshaft is a turbo camshaft (Aftermarket). There is way more explanation and science that is involved. Hint this video.
@@rafatrill yes it matters more when you're trying to RACE but as far as a turbo specific cam thats more of a racers edge that a street guy wouldnt really need as much and yes richard did mention that
@@KingJT80 why do u think we watch his videos to have the edge when someone wants the smoke on and off the track. That's like saying a street guy isn't a racer or doesn't go to the track once in his life
I'm an engineer now, but I used to race and build engines with my dad. These videos are great, I appreciate you going into science behind what makes an engine work. These videos are awesome. Subbed
That was a hell of an education, thanks. I recently restored a 67 Mustang coupe with a 302. I was looking for 300 hp and it came off the dyno at 297. It runs great, idles great, lots of torque, the cam goes from 1500 to 5500. I never understood what went in to it to make it run like that and your explanation has cleared up a lot of things.
Fantastic video.. i have learnt so much the best 49 minutes I've found on here. I can now go forward with a much better understanding on how things work and what not to do. Great job.
'I like this lobe separation because it fits my lifestyle'😂😂😂😂😂😂😂😂 On a serious note you've got one of the more informative, down to earth channels on the subject of engine building. Thank you for sharing your knowledge.👍👍
I study dental surgery, and i studied general medicine before. You sir teach better, and get information across more efficiently- than any professor/doctor/specialist i’ve ever met. Kudos.
Great info, I learned more about cams in these 49 min then 20 years of being in shops and garages and asking mechanics (mostly backyard LOL) what cam they recommend. You did a great job of explaining it.
I’m new in the business (engine building/tuning/optimization), and your video really helped me understand the issue. Thank you for the detailed information
Damn, I'm glad your back! Your channel is the fantastic.
4 роки тому+3
This is not new, just a great review of engine building the right way. Thanks for the formulas, I had lost track of them and my RIP engine building buddies.
This is THE best video I have seen on how to pick heads and a cam for your build. Thanks for taking the time to explain it piece by piece as well. I took lots of notes so I can plan a build that will actually get me to my goal. I came in expecting to learn about cams but you went so much deeper on heads and how to best match them together and now I have the information and equations needed to help me be confident in my choices. Subscribed! :)
I had math for mechanics in highschool 1978 it didnt have any usable info...this vid had 1000× more info...thanks for your knowlege... your a true motorhead
I really appreciate your videos. I grew up in the 50's working on small block Chevrolets. The Dontov .097 was our go to cam. How things have changed. Thanks again.
Fantastic job! Most fun I’ve had with my pants on in a long time - I’m gettin’ old alright. And I’m a Mopar guy! Always knew head flow was key. Learned that the hard way when I bought my first car from a dude who slapped a big old Crane Fireball into a 318 with factory heads and induction. Sounded great, but I could accelerate a sideways turd out of my constipated ass than that engine could accelerate my Charger. The key for me in this presentation was calculating HP based on % of flow between intake and exhaust - which I believe is a method of determining volumetric efficiency. The old rule of thumb (2HP per 1 CFM at max lift) is just a rough estimate. Now I see how the ability of a head to translate flow between intake and exhaust makes a massive difference in HP potential of the head. Great job! Now I can actually figure out a sane bumpstick for the 440 in my ‘70 R/T!!!
This was sooooo good I watched this over and over and over this is the best explanation of how this works and no more guessing on what to get and just putting something to together
So happy to see this video, had to come to the realization myself through research that cam lift is tied to head flow. Seems obvious when stated, but nobody else clearly said as much.
@@79tazman Agreed, but what I meant as well was a 0.600 lift cam is useless on a head that stops flowing at 0.500, as an example. So you need to choose a cam whose max lift matches the optimal flow point, and whose duration is appropriate for the RPM range where you want to make power.
This is fantastic, thank you! So far from part 1 Playing with the math shown here, I learned that a stock LS1 engine as found in a C5 Vette is actually pretty well set up from the factory. Camming it to death won’t gain much at all unless you buy some much more free-flowing heads too. That goes directly to build budget-you can pay to play, but there’s no free lunch. According to the math, the stock LS1 cam is pretty well optimized to the stock heads as they were built-without mods. Can’t wait to listen to part 2!
Welcome back! Consider writing a book on engine building , we need it and you will make more money. I went through the same thing you did when I built my hot rod.
The great Smokie Yunik had one years ago & it was called HP engine building & blue printing . I have this book & it explains even more than I am hearing here in this video such as compression ratios for certain cams as well as ramp speed for how fast the valves open & close which on some engines like the Chrysler Big blocks & small blocks they can use cams that have way faster ramp speeds which makes more power because they use a larger 906 lifter where as a SBC or Ford SB & big blocks use much smaller lifters so they can't take advantage of the faster ramp speed cams unless they like a lot of the racers are doing is to bore & bush the lifter bores to use bigger lifters to get more power but it's not cheap to have done plus having to buy custom lifters to boot . This was a secret that the Mopar guys for years new about & the GM & blue oval guys didn't until years later with the good engine builders years later figuring out how they could use bigger lifters to gain more power in those engines. The book also shows oiling systems on the Chevrolet Ford & Mopar small blocks & what's needed for racing for each engine in either drag racing or road racing . Smokie was a die hard engine builder but was a big Chevrolet guy & did stuff out of the box that actually worked through years of testing racing so look into trying to find his book or even who he was & what he did back then . Blue printing a engine goes a long way for longevity of the engine as well as one that makes more power & is smoother running as well & is always worth doing even on a street engine if you have the time to do it or buy the good aftermarket parts that are already done so you don't have to do the things to the stock parts to blue print them such as beam polishing on the rods checking to make sure all rod lengths are exactly the same or that the crank throws are all the same & it goes even further into cylinder heads where chamber volumes are all Cc'd & equalized .
THANK YOU.... I've been looking for this video, finally someone explaining cams, I am now confident on the choice of cam I go with, done all the math.💯👏👏👏
Honestly, after watching through it a few times and finding data and doing my math along with yours, I’m about to watch part 2 but I’m already so much closer to finding the cam I wanted then I was a few days ago. Considering I’m doing a restorative ‘super-stock’ rebuild all of the generic -shoved in your face- cams were all way bigger then I wanted. I was missing the math to find the right one, now I can actually build the set up I Wanted, instead of some cookie cutter combination.
seriously laughed. "I don't know this is all a big secret" hahaha ha! this channel is awesome. this is where I learned how to degree a cam and much more. great channel great info
I love cars and the science behind what makes them go. This is perhaps the best explanation of how to maximize your potential power without trial and error. Lots of information but simply explained.
Great video!! just bought a 1988 Iroc Z with blown head gaskets, Pulled engine to rebuild it, and have been struggling with cam selection. This explanation has helped tremendously.
Bryan Cranston used to be great, now he's just a loud mouth anti-trumper and loves telling us, the peasants outside of hollywood how to live. He's on the boycott list. Trump 2020, register to vote!
Man, this is the most informative information I have ever gotten about selecting a cam for my engine build. This was absolutely unbelievable thank you very much.
@@Doing_it_right_the_first_time It's a good introduction, but as with everything you gotta look around a bit before you draw conclusions. I've learned that if you really want good information, you should just buy a book. Haha maybe youtube should bring back the 5 star rating system they had back in the day.
Great informative video. Just one note....not all springs are being compressed at max simultaneously. Total combined spring pressure cant be 7,200lbs as pressure varies for each position on the cam lobe. I would assume its closer to about 1,500-2,500 lbs of combined constant pressure.
That’s what I was thinking, and wondering if the release of spring pressure helps push the cam/crank, and relieve some of that pressure while some springs are on the beginning of the cam lobe rise and some are on the fall of the cam lobe
The pressure after the cam reaches the top would be pushing down on the opposite side of the cam. Wouldn't this cancel the power lost on the opening of the valves? Regardless, this is a great video. 👍
I found this video weeks ago and finally watching it now. I'm halfway through and had to write this comment. Best Video Explaining Everything that I've been questioning while going through my engine build. This is the content I've been looking for! Thank you!!
Thanks a ton! I now have a better understanding of cam design and head flow, you definitely know how to break it down so everyone can choose the best cam for their individual engine head combination
Really enjoyed the video. I did a presentation on camshafts in my first year of engineering, I didn’t go quite as in depth as this though. Keep up the great work!
This is such a great video! I combined this info with the flow information I got from Richard Holdener's flow testing and was able to determine that the cam I wanted was too big and I can actually just use my neighbors 5.0 HO cam that he gifted me and better match the flow characteristics of my Roush Iron heads.
Thank you so much for making my decision making a lot easier. I have been trying to understand how the engines in my several vehicles actually work since about 1985. It’s now 2022 and I have never found a better explanation of this than I just watched. Please keep making my life easier by making these videos.
A 49 minute video is an eternity on UA-cam. It's tough enough for me to watch 10 minute videos without skipping boring stuff. That being said, I just watched this whole video for second time because it is excellent. You are an outstanding teacher. I used to watch your videos years ago when I built my first engine which was a 383 stroker in a 96 Z28. It was such a fun car and ran like a top. Now I'm working on a 454 that I dropped in a 78 Vette. Can't wait to beef it up, but this time. I'll choose the cam. Thanks again for sharing your knowledge with us.
I'm here doing research for a sportster customization project that's been building for years on the drawing board.... great video and it shows it the comments.
I’m only 71, but in my short life, I’ve never heard a better way to describe this than you’ve done here. You’re great.
I have to agree with RL. This was very complete and spoken in laymen plus terminology.
Now get your butt out there and build yourself an engine young fellah.
You kids these days, they just dont do anything unless someone is there to push them.
@@ThunderAppeal LOL....Lets to 3, eh?
Short life?? U lived for 71 YEARS!!!!
@@whydidijointhearmy 72 now, and have a track record of being 100% correct 100% of the time…ever since my divorce 36 years ago.
I always go back to this video because of how well everything is explained. There are a lot of people have this knowledge but not many people who can teach and explain it in such a way that the concepts are easily understood. Brilliant.
I've been watching videos on UA-cam since it began. I can say, with 100% certainty, that this is the most well thought out, perfectly executed, easy to understand, vastly informative, instructional, and motivational video I've seen to date. You rock dude. Dead serious. Thank you very much!
Wow thanks
This is so rudimentary and basic.
This is information that the old timers kept secret when I was a kid. I had the fundamentals of how this worked before, but these essential details are priceless. I've been building engines here and there since I was 16, so 27 years. I have come close but having known this I could have nailed it so much easier than assembling, driving, adjusting, deciding to swap or modify parts to get what I wanted out of the engine, on and on... I used to try to get help like this from my step Dad, my Uncles, etc...they would NEVER tell me about this stuff. Thank you SO much for this. I'm working on an old 350 in my square body right now and will be utilizing this info and rewatching this many times. More upsetting is knowing that people I asked KNEW this and just treated me like I was stupid because I didn't know what I didn't know. I knew I was missing something and this was it - the MATH. SUBBED - thanks again!
This is hands down the best channel on UA-cam related to engine building. I’ve learned a lot but more importantly it’s helped me do all my own work and build my motor
Hence why there's only 90k subs.... A majority of the auto enthusiast community "wish" they had what it takes but only about 10% have the capacity to actually learn and retain information to be dominant in their platforms.
Buy David Vizards book, building the SBC on a budget. I've got all the books, but his is hands down the best.
I have learned alot from this guy.
Best 49 minutes I’ve spent on UA-cam. I’ll be watching again with a notebook handy as I prepare to build my 6.0 LS.
same
Lol I have to watch this again and take notes as well, wish I would have don’ it the first time!
As will I with my 283 SBC
Call Texas speed they know ls stuff tell them Armando sent ya
This video is great! Being a free teacher is hands down the most value you can bestow upon a community!
Have yet to see anyone delve into the science of building an engine. I learned more in 15 minutes of your vids than years on the internet.
I'm glad you couldn't find a explanatory video on camshaft selection. You did an excellent job. I even took notes. Thank you for taking the time, you helped a lot of people.
Glad it was helpful!
ha i did too
Took notes with drawings , I was using ice cube trays and a fat man , lol but it all made sense .
@@g86jn1 I like Fat Girls with one leg shorter than the other.
@@sux2bu883 cruise the amputee wards of the hospitals?
I have a 1970 mercury cougar with a 351 Windsor. Some years back I port matched the intake and exhaust ports, cleaned up the bowls, and ground out the EGR bumps. Put a set of Hooker headers and dual exhaust on the old girl. At 50 mph I had a severe lean misfire. I drilled the main jets out .010" that were in the stock 2 barrel carb, advanced the timing a few degrees with the stock distributor.
What a street performer!
No change with the camshaft.
Something told me to have my notebook ready...glad I listened to "something" and I'll still watch again! Nice job & greatly appreciated...you're a natural teacher and that makes All the difference.
I hope it's very gratifying for you to see how many people are positively affected by your efforts. Thanks!
Why is this not the first video to pop up when searching about basic cam information…. Literally everything you need to know compiled Into one video.
People with attention span issues who are visual learners appreciate the effort you put into this video. Everything I needed to finish building this striker for my elco
cool glad it helped
I thought I knew how to pick a cam based on intended use. I never realized about matching cylinder head flow to cam lift. After watching this I went and found the flow sheet for the cylinder heads on the 383 I'm building. I was going to install higher ratio rockers for more lift but decided that stock ratio with the springs I installed might offer a little more engine life. It turns out that the cam that I accidently stumbled upon matches my cylinder heads perfectly as he described. Thanks for another great vid. Totally made my day! Lol
383? SMC or BBM?
What cam and heads for the 383¿
I wish you were my autoshop teacher in high school. I've learned more in 49 minutes, than I learned in 2 yrs of autoshop. You're correct in the video, no one teaches you this stuff.
Hands down best explanation of these principles I’ve heard. Not too many people understand these concepts
I'm finding this GEM 3 years after you dropped it here and I appreciate you so much for it! This was great. Your video answered my original question and then some. Thank you for this!
Mate ive been in this game for the last 30 years. Ive listened to alot of guys regurgitate what someone else has told them or what they have misinterpreted from reading text that they dont totally get or understand the concepts of head and cam design . That was by far the best lecture on valvetrain fundermentals ive ever listened to. Some topics i wasnt sure on were confirmed by you just now.
Thankyou.
Im subscribing to the channel right now
Glad you liked it
I have always wondered how to do this (pick a cam etc) and now I know.
Thank you very much! Great Job.
Probably the best in-depth cam video ever. Thank you for sharing your knowledge!!
You are an invaluable asset to anyone learning the mechanics of the gasoline engine. I've built/cammed more than a few so this was mainly a review......BUT, I learned something. As far as a "cool sounding engine".....I agree....we all love them. However, that said, reversion thru the engine loses power if you don't find a way to 'ram' the mix back down into the cylinder. When I was working with a Cosworth Vega engine that I was using Webers for carbs, I worked hard to get the a carb stack that would contain the fuel mist and be proper length for the rpm/torque/hp that we were looking for from that engine. Short stacks/high rev hp..long stacks/more torque. I had a bit wider parameters as the 122 cubic inch motor had been shown to be able to rev to 10,000 rpm with the right cams. Fun stuff. The whole thing is that the individual components better be able to "shake hands" and work together as a whole. Again....great VIDEO.
THANK YOU! As a noob, I REALLY appreciate your easy-to-follow explanation of the fundamentals. No guessing on my next cam. You helped me save money and avoid unexpected/disappointing results.
Check into David Vizard Powertec 10 videos. He has a couple on cam selection that deserve paying attention to. I understand the statement about a more efficient port being compatible with a wider LSA for a smoother idle. Every video or book has useful.bits of information. Pay attention and consider all the information. Sometimes a combining of that information will be best.
For a restrictive exhaust port, finish the seat angle at 40° as this will aid low lift flow. Also consider a higher ratio set of rocker arms. This gets the valve off the seat quicker and closes quicker. This also aids low lift flow. A single pattern cam tends to make more torque, provided decent ports. These two things enable use of a single pattern cam, or a cam with less split between the intake and exhaust.
Hands down, best video I’ve seen on camshaft and cylinder head fundamentals! The way you teach makes this so understandable, I will be reverting back to this vehicle when it comes time to build up my Monte Carlo. Thank you for taking time to make this video.
Excellent video. Thank you for taking the time to put this together. Now I feel better equipped to answer the questions when I call to spec a cam for my style of use.
Watched this vid, and I will watch it again, and probably then some more. Not only because it's hands down the most comprehensive explanation of this subject but also because you are massively engaging. Thanks man
DUDE THIS ROCKS THANK YOU SOO MUCH!! . Wish my dad was still alive. I am adopting you.
This is by far the best explanation of camshafts and related valvetrain considerations that I have ever seen. Thank you sir!
This is great. I'm glad you revisited this and added more detail. I used your original videos as gospel when i was building my truck engine and I highly recommend everyone to your videos who are asking about cam selection.
Awesome description of the basic fundamentals of obtaining HP. Thanks for your time in putting this together will assist me greatly with my little Holden 6
Very good info indeed. Love the demystification of LSA Especially how it relates to OBD2 controlled engines.
The head flow number analysis was certainly the icing on the cake! Thanks a million.
This is one of the best videos on designing an engine setup that I've ever seen. Thank you for posting this.
hes pretty swift
Glad you liked it!
You give the average guy a PhD in engine building.. Ithink their no better teacher out here.. Your truly God sent. Thanks alot..
I've been a fan of yours since I ran across the video of you rebuilding the GMC BIG BLOCK 305 V6 SEVERAL YEARS AGO!!! I THOROUGHLY ENJOYED THOSE VIDEOS,, BECAUSE I'M A FAN OF THAT BIG V6,, MY 66 GMC STEPSIDE HAD ONE IN IT,,, YES HAD ONE AND STUPID ME RAN SOME FLUSH FLUID THROUGH IT AND FORGOT IT HAD THE HIGH VOLUME OIL PUMP,,, AND THEREFORE STOPPED THE SCREEN UP AND SPUN A ROD,,, I KNOW OF ANOTHER ONE NOT FAR FROM ME I'M GOING TO LATCH ONTO AND IF I REBUILD IT,, YOUR VIDEO WILL BE THE GO TO VIDEO!!! THANK YOU FOR DOING THAT,,, A WHOLE LOT OF PEOPLE DON'T KNOW GMC BUILT A BIG V6!!! AND THAT SURE WAS A SWEET RUNNING ENGINE WHEN YOU WERE DONE,,,, YOUR THE MAN!!! A GREAT INSTRUCTOR!!
If you do not have a bench flow measuring device you can always use a shop vac and an amp clamp with a multimeter to at least find out how each port performs vs the others. Lower the amperage, lower your flow. Put the shop vac hose on the combustion side of the valve and then you can get your different lift amounts against your different amperage draws.
Edit: this works best for trying to make sure you have equal CFM through each cylinder when porting and polishing. It can help prevent severe unbalance between cylinders. It is just a DIY means of comparing.
Very cool method, going to try this tonight
Where were you years ago when I needed you! ;) Oh well, building my 427 Chevy again, this is really helpful ! Thx.
Hey this guy is definitely one of koolest, in depth teacher I’ve come across. I’ve seen a lot of so call teachers trying to explain, but not even close. I really appreciate the knowledge your share to the world, and theirs so many out that would not share this information. Thank you so much!! I will always support your channel.
This has been the most helpful and effective explanation I have ever heard. And was in thought of building a 347 stoker. Blown away by your examples. Will keep tuning in for new videos
Great to hear!
Myvintageiron between you and Pete's garage you've both have given me the confidence to learn and build my 350 engine. I would like to say thank you for sharing your knowledge I truly appreciate your help and advice .
You are a blessing to this 55 year's old man . I'm forever greatful.
Blessings and more Blessings to you and your Family 🤗👌
I love pet's garage I've seen all his videos he is very good and THX for the kind words
myvintageiron7512 has given me confidence to build my own 350 as well and I am 74 yrs old. I have never fooled with anything in the way of motors before!!!
I saw how Pete rebuilt a Studebaker. I thought it was fascinating.
This some amazing information, you should make a part 2 and talk about the differences in a Turbo, Nitrous, Supercharger, N/A camshaft as far as specs
The 5th engine cycle,blowdown during overlap.
I feel richard holdener has that area with dyno runs
@@KingJT80 negative his theory is every camshaft is a turbo camshaft (Aftermarket). There is way more explanation and science that is involved. Hint this video.
@@rafatrill yes it matters more when you're trying to RACE but as far as a turbo specific cam thats more of a racers edge that a street guy wouldnt really need as much and yes richard did mention that
@@KingJT80 why do u think we watch his videos to have the edge when someone wants the smoke on and off the track. That's like saying a street guy isn't a racer or doesn't go to the track once in his life
This is by far tree most comprehensive video on cams I have found. Fantastic information
Glad it was helpful!
By far the most clearly explained mystery of how a camshaft works in regards to the overall motor and head package! Thank you!
Genius, teaching is a work of art, and simplification is perfection.
This was the absolute best simplified explanation I've heard. Just in time for rebuilding my 302. You've really opened my eyes. Thanks.
Very informative but still I'm not sure what I want to do with my '63 327 which I'm going to rebuild here soon which will be going in my '89 C1500
Very thorough, and no bs. Straight to the point, and well spoken. You are a good teacher. Thanks
This man is a national treasure😂. He's the best engine building teacher hands down
Awesome video. Helps clarify some partial info I've gotten over the years.
I'm an engineer now, but I used to race and build engines with my dad. These videos are great, I appreciate you going into science behind what makes an engine work. These videos are awesome. Subbed
That was a hell of an education, thanks. I recently restored a 67 Mustang coupe with a 302. I was looking for 300 hp and it came off the dyno at 297. It runs great, idles great, lots of torque, the cam goes from 1500 to 5500. I never understood what went in to it to make it run like that and your explanation has cleared up a lot of things.
Fantastic video.. i have learnt so much the best 49 minutes I've found on here. I can now go forward with a much better understanding on how things work and what not to do. Great job.
'I like this lobe separation because it fits my lifestyle'😂😂😂😂😂😂😂😂
On a serious note you've got one of the more informative, down to earth channels on the subject of engine building. Thank you for sharing your knowledge.👍👍
😁
I study dental surgery, and i studied general medicine before. You sir teach better, and get information across more efficiently- than any professor/doctor/specialist i’ve ever met. Kudos.
Great info, I learned more about cams in these 49 min then 20 years of being in shops and garages and asking mechanics (mostly backyard LOL) what cam they recommend. You did a great job of explaining it.
I’m new in the business (engine building/tuning/optimization), and your video really helped me understand the issue. Thank you for the detailed information
Damn, I'm glad your back! Your channel is the fantastic.
This is not new, just a great review of engine building the right way.
Thanks for the formulas, I had lost track of them and my RIP engine building buddies.
This is THE best video I have seen on how to pick heads and a cam for your build. Thanks for taking the time to explain it piece by piece as well. I took lots of notes so I can plan a build that will actually get me to my goal. I came in expecting to learn about cams but you went so much deeper on heads and how to best match them together and now I have the information and equations needed to help me be confident in my choices. Subscribed! :)
Glad it was helpful!
Gotta be one of the absolute best tutorials on camshaft selection. I took notes and actually did math along with you. Thanks!
Glad it helped!
Finally
Someone that can explain and make some sense based on flow
Thanks
This is the only video of his that I've seen, and I'm subscribing. I'm in for a ton of information!
I jus did same thing for same thought 👍
I had math for mechanics in highschool 1978 it didnt have any usable info...this vid had 1000× more info...thanks for your knowlege... your a true motorhead
I really appreciate your videos. I grew up in the 50's working on small block Chevrolets. The Dontov .097 was our go to cam. How things have changed. Thanks again.
Fantastic job! Most fun I’ve had with my pants on in a long time - I’m gettin’ old alright. And I’m a Mopar guy! Always knew head flow was key. Learned that the hard way when I bought my first car from a dude who slapped a big old Crane Fireball into a 318 with factory heads and induction. Sounded great, but I could accelerate a sideways turd out of my constipated ass than that engine could accelerate my Charger. The key for me in this presentation was calculating HP based on % of flow between intake and exhaust - which I believe is a method of determining volumetric efficiency. The old rule of thumb (2HP per 1 CFM at max lift) is just a rough estimate. Now I see how the ability of a head to translate flow between intake and exhaust makes a massive difference in HP potential of the head. Great job! Now I can actually figure out a sane bumpstick for the 440 in my ‘70 R/T!!!
This makes sense. Finally, someone makes sense. I can now figure it out myself instead of having to ask someone.
This was sooooo good I watched this over and over and over this is the best explanation of how this works and no more guessing on what to get and just putting something to together
i wnt to school at uti glendale hights illinois back in 1995.this by far the best cam video and teachings i have ever seen awsome job
So happy to see this video, had to come to the realization myself through research that cam lift is tied to head flow.
Seems obvious when stated, but nobody else clearly said as much.
Yeah the more lift means the valve opens more allowing more air and the more air means mo power
@@79tazman Agreed, but what I meant as well was a 0.600 lift cam is useless on a head that stops flowing at 0.500, as an example.
So you need to choose a cam whose max lift matches the optimal flow point, and whose duration is appropriate for the RPM range where you want to make power.
@@perotekku thank you - finally - somebody. your cam profile should match your head flow. your carb or injection map should match them both.
I love it when I see a new myvintageiron video pop up. 👍 you’re a great teacher, don’t stop the videos!
Thanks for this. This is a much more define and disciplined and rigorous approach than what I previously knew.
This is fantastic, thank you! So far from part 1 Playing with the math shown here, I learned that a stock LS1 engine as found in a C5 Vette is actually pretty well set up from the factory. Camming it to death won’t gain much at all unless you buy some much more free-flowing heads too. That goes directly to build budget-you can pay to play, but there’s no free lunch. According to the math, the stock LS1 cam is pretty well optimized to the stock heads as they were built-without mods. Can’t wait to listen to part 2!
Absolutely AWESOME. You’re a natural teacher.
Thanks!
He is an actual instructor. He's great in person. Showed me "how to" allot about engines.
Welcome back! Consider writing a book on engine building , we need it and you will make more money. I went through the same thing you did when I built my hot rod.
The great Smokie Yunik had one years ago & it was called HP engine building & blue printing . I have this book & it explains even more than I am hearing here in this video such as compression ratios for certain cams as well as ramp speed for how fast the valves open & close which on some engines like the Chrysler Big blocks & small blocks they can use cams that have way faster ramp speeds which makes more power because they use a larger 906 lifter where as a SBC or Ford SB & big blocks use much smaller lifters so they can't take advantage of the faster ramp speed cams unless they like a lot of the racers are doing is to bore & bush the lifter bores to use bigger lifters to get more power but it's not cheap to have done plus having to buy custom lifters to boot . This was a secret that the Mopar guys for years new about & the GM & blue oval guys didn't until years later with the good engine builders years later figuring out how they could use bigger lifters to gain more power in those engines. The book also shows oiling systems on the Chevrolet Ford & Mopar small blocks & what's needed for racing for each engine in either drag racing or road racing . Smokie was a die hard engine builder but was a big Chevrolet guy & did stuff out of the box that actually worked through years of testing racing so look into trying to find his book or even who he was & what he did back then . Blue printing a engine goes a long way for longevity of the engine as well as one that makes more power & is smoother running as well & is always worth doing even on a street engine if you have the time to do it or buy the good aftermarket parts that are already done so you don't have to do the things to the stock parts to blue print them such as beam polishing on the rods checking to make sure all rod lengths are exactly the same or that the crank throws are all the same & it goes even further into cylinder heads where chamber volumes are all Cc'd & equalized .
THANK YOU.... I've been looking for this video, finally someone explaining cams, I am now confident on the choice of cam I go with, done all the math.💯👏👏👏
Honestly, after watching through it a few times and finding data and doing my math along with yours, I’m about to watch part 2 but I’m already so much closer to finding the cam I wanted then I was a few days ago. Considering I’m doing a restorative ‘super-stock’ rebuild all of the generic -shoved in your face- cams were all way bigger then I wanted. I was missing the math to find the right one, now I can actually build the set up I Wanted, instead of some cookie cutter combination.
seriously laughed. "I don't know this is all a big secret" hahaha ha! this channel is awesome. this is where I learned how to degree a cam and much more. great channel great info
This is the best explanation on how to select a camshaft I have ever seen or read.
Will definitely share with my friends.
Thanks
I love cars and the science behind what makes them go. This is perhaps the best explanation of how to maximize your potential power without trial and error. Lots of information but simply explained.
Oh man ive been waiting for someone to do this video. Thanks a million
I did this video last week my man.
@@stevie..d..pontiactransamm1215 ill be over in a to check it out.
Sweet,my man.
I loved watching this video, never learned so much engine math. Thank You for the knowledge you shared.
Great video!! just bought a 1988 Iroc Z with blown head gaskets, Pulled engine to rebuild it, and have been struggling with cam selection. This explanation has helped tremendously.
Nice job breaking down the basics of cam design and flow. you make the point that bigger isn't always better; or as I like to think-less is more.
The walter white of V8s
JESSE !
😂😂😂
No, he is Walter,
i am Jesse...
Bryan Cranston used to be great, now he's just a loud mouth anti-trumper and loves telling us, the peasants outside of hollywood how to live. He's on the boycott list. Trump 2020, register to vote!
Why re voting Trump?
Awesome video, answered a lot of questions I had about camshafts. Glad you're back.
Man, this is the most informative information I have ever gotten about selecting a cam for my engine build. This was absolutely unbelievable thank you very much.
💯 %
I've been searching for this exact video. Not some guy saying stuff that doesn't really EXPLAIN. Thank you.
Glad I could help!
Thanks man! Great tutorial. 31% less ignorant according the dyno. Wife doesn’t notice a difference.
I feel like Google will delete this because it's such good information..lol
@@oakmot5477 That's old school youtube for ya. Too bad it's being taken over by corporations & talking heads.
Please don't give them ideas
Only if you use the word "Tranny".
@@Doing_it_right_the_first_time It's a good introduction, but as with everything you gotta look around a bit before you draw conclusions. I've learned that if you really want good information, you should just buy a book.
Haha maybe youtube should bring back the 5 star rating system they had back in the day.
@@donrutter6765 I'm surprised you can even say that, If I write that word my comment vanishes in a minute.
Oh my God thank you! I've been dying for a comprehensive vid on cams with numbers
Your information on cams was so informative , now i have a insight on a new roller cam for my 69 -427 with great flowing heads well done thank you !!
Great informative video. Just one note....not all springs are being compressed at max simultaneously. Total combined spring pressure cant be 7,200lbs as pressure varies for each position on the cam lobe. I would assume its closer to about 1,500-2,500 lbs of combined constant pressure.
Great point Frank.
Good point, lower operating pressure, with the important operative word being 'constant'.
That’s what I was thinking, and wondering if the release of spring pressure helps push the cam/crank, and relieve some of that pressure while some springs are on the beginning of the cam lobe rise and some are on the fall of the cam lobe
The pressure after the cam reaches the top would be pushing down on the opposite side of the cam. Wouldn't this cancel the power lost on the opening of the valves? Regardless, this is a great video. 👍
Great point!
I found this video weeks ago and finally watching it now. I'm halfway through and had to write this comment.
Best Video Explaining Everything that I've been questioning while going through my engine build.
This is the content I've been looking for!
Thank you!!
Thanks a ton! I now have a better understanding of cam design and head flow, you definitely know how to break it down so everyone can choose the best cam for their individual engine head combination
This video is awesome. The way you explain is just off the charts. Love your channel man
All the valves dont open at once. But most of your information is great.
Yeah it's more of a cumulative total of pressure.
i was just thinking the same thing lol but is on right track with analysis.
@@matthewjeschke Agreed. I am hoping to make a cam choice this century. Very good and well presented information.
If I remember right there are 4 valves closed at a given rotation angle but at times all valves are either opening or closing
@@wismar1971 I honestly, wish I had seen his video when I selected a cam for my LT1, but think I got a pretty sweet cam regardless.
Really enjoyed the video. I did a presentation on camshafts in my first year of engineering, I didn’t go quite as in depth as this though. Keep up the great work!
This is such a great video! I combined this info with the flow information I got from Richard Holdener's flow testing and was able to determine that the cam I wanted was too big and I can actually just use my neighbors 5.0 HO cam that he gifted me and better match the flow characteristics of my Roush Iron heads.
Thank you so much for making my decision making a lot easier. I have been trying to understand how the engines in my several vehicles actually work since about 1985. It’s now 2022 and I have never found a better explanation of this than I just watched. Please keep making my life easier by making these videos.
you got it
Definitely a "must watch" video!
I will be referring back to this many times , I'm trying figure out a sbc 383 stroker, thx great input
I'm starting the same build this weekend.
What did you find??
A 49 minute video is an eternity on UA-cam. It's tough enough for me to watch 10 minute videos without skipping boring stuff. That being said, I just watched this whole video for second time because it is excellent. You are an outstanding teacher. I used to watch your videos years ago when I built my first engine which was a 383 stroker in a 96 Z28. It was such a fun car and ran like a top. Now I'm working on a 454 that I dropped in a 78 Vette. Can't wait to beef it up, but this time. I'll choose the cam. Thanks again for sharing your knowledge with us.
I'm here doing research for a sportster customization project that's been building for years on the drawing board.... great video and it shows it the comments.
great videos by this guy, i've personally learned a lot this week watching his videos
Thanks for sharing this info!! You have passion for teaching technical info - I enjoy the mathematic equations.
Yeah now I wish I would have paid more attention in math classes.
@@novaguy8419 lol haha - you're where you're supposed to be!!!