Cylinder Head 204 - Porting & Polishing
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- Опубліковано 24 кві 2014
- This is a first-generation 1992 1.6L Hyundai Elantra small-combustion-chamber head. Thats what it is. It's a J1 Elantra cylinder head. Good luck finding another one like it. (read more)...
In Cylinder Head 106 I talked about the mainstream porting theories as they are discussed. We looked at a cylinder head that I have thousands of dollars of professional work performed on, and a bone-stock second-generation head that I didn't port.
In this video I just might do something you haven't seen done before. For some, that may be uncomfortable. The port and polish job I perform here is what I think will work best for my current build. This is not an extreme killer port job. What will be different here is where port textures are concerned, I will be following the advice of a reputable source that will remain un-named. You're free to port yours differently than I do in this video, and I give you that out, around the 20 minute marker.
The Hyundai is far from being an ultimate-performance build. It's a $400 box of scraps with nothing but time invested. It's perfect for this video. My finished product WILL be an improvement over what I had. I don't yet have access to a flow bench. I still have an achievement to un-lock. As far as you should be concerned with the techniques I employ... without flow numbers there is no evidence of what this will do, but we will gather lots of info from dynp sessions and drag strip time slips. If I could test it on a flow bench, I would.
There are MANY, and when I say many, I mean thousands of flame war mongering pirates floating around on rough seas with a hair trigger cannon finger itching to fire if you port a head any differently than what the herd mentality says to do while porting a cylinder head. I cover the herd mentality because it has merit. It's been tested. Tried and true. But I don't follow it to the letter of the law. I'm definitely not here to de-bunk it. I would port a cylinder head differently for each build based on how that engine was used. There's an extremely valid reason why relating to air speed. It's not the texture of a port that maximizes the effect of fuel atomization, but the velocity of the air running through an x or y sized valve. The driving factor in this is the piston speed. I'm not going to give you the technical information, but will refer you to information about the Lovell factor. There's a better description of this in the links below, and even a calculator to help you find your engine's sweet spot.
Why the Lovell factor is important:
www.highpowermedia.com/blog/3...
Lovell gas factor calculator:
www.rbracing-rsr.com/lovellgas...
Only people who have flow testing equipment know for sure what really works and have the capability to produce a perfectly-matched port job for the ultimate performance build. Those guys know the definition of ultimate, and THEY are floating below the water Aegis-class submarines ready to blow your comment up if you don't know what you're talking about. They don't care if you're an armchair mechanic or a herd of pirates. I will say, they're zoomed in pretty close on me right now, and I'm expecting to take a few hits. My work will be tested based on dyno and drag strip performance, and the results will be posted here. Fortunately, those kinds of videos are a WHOLE LOT EASIER TO MAKE!!! - Авто та транспорт
This has got to be one of the most comprehensive videos on porting and polishing I've seen. Mad respect!
+briansmobile1 Thanks Brian! Man, I'm flattered to hear that coming from you. I may not upload often, but I try to make up for that however I can. This was an experimental P&P method and thus why I'm doing it on the Hyundai head. I'd do the others a little differently. But here's wishing you good health and double the success in 2016! Merry Christmas!
Still watching this video, all the cylinder head guy guard information like this and won't tell what they do!
Did a 205 pinto 2.0 short engine & cylinder head with half your enthusiasm great results great video
Makes me hard when someone can talk super technically for us more comprehensive folk... Lots of valuable experience and detail spilling out like poetry.
its good, but he jumped the gun in the beginning. over polished valve seats.
From a 40 year + veteran of High Performance head building, you sir have mad skills and can't wait to see what you do once you have a flow bench
The pro shop I use has a porting and polishing setup that is hypnotizing to watch. He fills all the ports half full of steel and lead shot and then tapes them shut. Then this machine rotates it in all three axis at the same time it spins between the clamps. He shuts off the lights and goes home while this thing keeps rolling. Next morning he removes the tape and dumps out all the shot. What's left is amazing. Every single millimeter that the shot can get to is smooth and shiny as a mirror. It peens over any casting lines and casting defects. He claims a 30% increase in flow of both air and fuel. But it only cost him about 40 minutes of prep time in labor. The rest is being done while he sleeps. Liked and subbed
Uhhhh...LS7 head cnc porting routinely sees around a 7.5% increase in flow. That's 7.5% using cnc porting. A 30%(!) Increase for rolling some shot through a head? Gotcha. So, if the intake side flows 330 cfm, after his "porting", it will flow 429 cfm? Engine builders have the easiest job in the world. Selling rubes horsepower.
Gentleman I think society lost one of the best surgical doctors we could have. You are a talent bud. Excellent work.
This video was what prompted me to have the courage to do what everyone including myself thought I could never be able to do. I had 2 Mitsubishi Eclipse. 01 2.4 at that was wrecked and an 00 2.4 mt that I'd put a valve thru a piston. I stripped both cars to the frame and rebuilt one mt motor and car completely by myself in my gravel driveway. My confidence has skyrocketed and I've gained respect throughout my community because of my efforts and accomplishments. After watching this video I decided since I'm doing this I might as well go full force. So I did a port polish on the head myself. When I took it to a well respected shop to have the valves reseated the owner asked me 4x who did the porting job which I repeatedly told him I had. By the 4th time he asked I was frustrated why he couldn't believe I'd done it I asked why and his reply was, There are grown men, professionals who don't do work this good. He then asked what I used which I replied with a grin...my Dremel! I thought he was going to pass out! So the little blonde who knew nothing about cars and even less about motors has become somewhat of a legend around that shop for the story of my first rebuild and port/polish abilities. And it's all thanks and credited to you and this video. Again, thank you. You have no idea how it's literally changed my life.
I'll be a fan forever~
Cyndi
Right on Cyndi! I wish I could shake your hand!
You just did my friend. Props ;-)
No really... I'm not sure you're seeing the whole picture. This embodies exactly what I set out to do with this channel. DIY's are too rigid. All I ever wanted to make was motivational videos for mechanical people. A little success and confidence only builds more if you stick to it. It's how I started. Your success brought me success. Oh, and BTW, your cover's blown. Now I know who the female is that watches 2% of my videos. ;) I thought it was either my mom and sister, or some kid using his mom's computer. Kick ass!
I'm seriously the only chick?? Whoa. Ok yeah I'll admit I'm a little different. My friends and neighbors all thought I was just straight crazy. Sheer determination is what drove me. It almost took me several times with that project but I had everything invested in those cars. I couldn't quit.
I've always been hands on kind of person but never with cars. Didn't care really as long as it got me there. But Ive always been a 3g fan. Love that body style so when I finally got one that was it. Hooked. I'm actually putting it back together as we speak. The Tob had a kaniption fit in the bell housing. So I've learned about manual transmissions, aluminum flywheels and clutches. I put a stage 3 Apex, Fidanza flywheel and am about to add fluids and see what she's got.
When I completed the first project with the 2 cars I was so confident I bought another one to rebuild. Lol I'm addicted. I've just got the basics down but I want to learn about forged pistons, boost, turbo...More about suspension...It's a whole new world. People who knew me before can't believe it if they see me now running to a part store covered in grease hahaha. I love it. You've definitely accomplished your goal. I'm now teaching my girlfriends about their cars and how to take care of it themselves. Very powering for a woman. I know more about this car than any of the guys at my local parts stores. Yeah, all the stores. It's a great feeling.
Your videos are very informational and described is what I liked so much. The detail you give of everything you do and the reasons is invaluable in my opinion. Too many try to rush through with the camera all over the place...Ugh no thanks. So when I saw how you took the time to explain for someone who had no knowledge of anything mechanical, it helped tremendously. You're an incredible teacher I must say.
"You'll start polishing the dumbest crap just because you can" ha TRUE
+joelyboyblue ive polished to much crap, i started to polish coins :(
i too am cursed with the polish touch...
+imashankusobad i even polish my polish!
Xiuhcoatl
I polished the harmonic balancer and now the belt squeaks
great work, and an excellent tutorial. One rule I always keep in mind is intake port velocity for torque, more port volume robs that velocity, so it's a balancing act from intake
gasket to valve seat.The trick is to resist opening intake ports up too much, once it's gone it's gone... best to aim for progressive transition and know when to stop.
To make real power, always do your flowbench tests with 50% valve lift, as that's where most of your flow duration occurs.
I made my own once with a vacuum cleaner and a manometer, simple but very effective.
Thanks for posting.
5 yrs later I came back to watch this. I followed most of these points and made good power from porting my heads. Even only doing a Stage 1.5 on my J32 made 316/262.....nice gains!
Thanks for an awesome video that is still prevalent till this day.
pilzy els I found 80grit, to 120, to 340ish buff wheels like he has is the best combo.
80 to knock the high stuff down and smooth the port, 120 to smooth and 340 buff to polish (with polish compound).. anything beyond that is a waste of time of a Street, even minor track car. I did polish the combustion chamber and ran 100shot of nitrous for 100k Miles. It was very rare if I got any knock
Nicely narrated. Not any "umms" and such. And thanks for talking while showing the work instead of us looking at you.
I second that sentiment. I hate the videos where someone is going um um um or just blabbing unimportant crap. The narration was very informative and critical to understanding how to do this process and why it's done.
I looked at this video and only intended to skip through it. Turns out that was the fastest half hour of my life and you're definitely getting another subscriber. Great job.
Thank you so much for making this video and taking the time to edit all the hours of work you did. I found this to be incredibly insightful and very informative and the commentary was great, you really explained things clearly. Awesome job, I'm definitely saving this one to my favorites for future reference.
It’s these types of videos that make UA-cam so awesome. Thanks for taking the time man!
not often i watch a 30 min video but I managed to with this one, excellent work!
I was just thinking the same thing haha
You have redefined polish and porting. Brilliant.
I thought this was a 10min video😂
you and me both, I'm usually good for 9 minutes before I'm on to the next video
This is exactly the steps (and about same time lap) my sister takes when she is polishing her fingernails.
lol!
HAHAH!!
classic
Do her nails perform better after?
That awkward moment when a dude uses one of your accounts for a moment, and you get a taste of what "...collect and use anonymous usage statistics to improve our products, and the products of our affiliates'." actually means.
No matter the real outcome whether it improves performance, I believe that the extra time spent on polishing, leaves a great amount of satisfaction within each individual. ANYTHING worth doing, Is worth doing RIGHT. I really enjoyed the video and the editing. Thank You
JUST AWESOME
I OWNED AN AUTOMOTIVE MACHINE SHOP BACK IN THE 80'S AND I'VE PORTED SO MANY HEADS I'M TIRED OF IT, BUT I ONLY DID CAST IRON HEADS AND HAVEN'T DONE IT SINCE THE 80'S... YOU DIDN'T GET TO THE VALVES AND IF YOU DON'T POLISH THE VALVES, YOU MIGHT WANT TO CONSIDER CHUCKING THEM INTO A HIGH SPEED DRILL PRESS AND POLISHING THEM TOO...VERY PROFESSIONAL VIDEO... YOU BROUGHT BACK A LOT OF MEMORIES FOR ME OF ALL THE WORK I DIDN'T GET PAID FOR...
Thanks for sharing all the hard work, editing that much video is a pain! Not to mention shooting it while you're trying to get car work done. 32 minutes and I wasn't bored once, the narration is excellent. Can't wait to see the Hyundai back together!
Thanks man! I was worried about that. I doubted compressing it to 32 minutes could make it interesting? I lost all perspective of what was boring and what was not boring on this job. 'tell ya the truth... having just returned home from the day job on a Friday, I can tell I still haven't recovered. : |
This video has a lot of great lines, but my favorite is @ 9:43 with that visual of two valve guide eyes staring you in the face.
Voiceovers are work, man. I hold that as the highest-esteemed compliment from the 1-take master of DIY videos. I've seen you do it more than once. Every time I do, I'm all like... "man how much time it would save editing if I can do that." :) b
Wow. This video makes my top 3 list. Done extremely well, informative yet kept simple. I'm a 30 year home engine builder and still learned a good few things from this video. I thank you....Cheers, Jim
I have prob watched this video 20 times this is the best most in depth video on porting and polishing I have ever seen
thank you for making such a good video and not ruining it with music in the background.
Excellent vid, mate, almost made me go and tear up the head off the engine and start working. Thank God laziness won over it! At least for the moment.. Thank you for uploading this!
LOL! I enjoyed the chuckle this morning. Thank you!
6 years later.. still love seeing this vid pop up on my youtube feed.
13 mins in and I'm hooked you got the best port Polish info on UA-cam
A great video and you do professional quality videos. You are very informative and explain everything as you go. You don't leave us viewers saying to ourselves "why did he do that". Thanks for your time and knowledge!!
I have now watched this video 3 times, i have never polished metal or anything and i feel as though im addicted to polishing metal already lmao, definitely gonna try my hand at this when the opportunity presents itself. Great video btw
+TriniRogue You were warned. xD
I'm not sure if the tech mentioned this tip but.....the term blueprint means to make every cylinder the same as that makes even firing and power supply.It also makes an engine easier to tune and of course gives the engine longevity.That means all your port sizes and finishes must be identical.Another tip i learned from a World class racing builder is to match all your spark plug positions.While the head is apart one by one you make sure the spark plug is parked/seated in the exact position.So that means marking them to suit each cylinder.Turbo and supercharged engines are vastly different to naturally aspirated engines also for abovious reasons.This video is insanely good and much respect to the tech.Happy porting y'all.
"plug indexing". ...and thank you! All correct!
This is THE best video i have ever come across on porting n polishing heads. Thank you for posting this. I was planning on doing a PnP job on my heads, and after watching this i am far more confident. Comprehensive, concise, and very well described, explained, and exampled.
Holy shit, this is the most satisfying thing ive ever seen.
Thank you John! I've got a lot of content that's like this. A lot of it is very technical, but I have fun doing it.
I’d love to see a before and after Dyno run. Great work man!
WOW! Experience shines through the ease of explanation! I was tracking everything, knock and cylinder head hotspots... never thought about it... good reason to run the ol borescope in beforehand.
Thank you!
this is one epic video to watch and listen to you, amazing skill set and devotion to perfection you have,
I just got halfway through porting a Mazda Protege cylinderhead using the techniques featured in this video. So far I'm pleased with the results. I dove right in with confidence. This video explains with great detail basics and gives a few tips and tricks. Great video Jafro. Hope to see many more. Subscribed.
How did it go?
@@elic.2443 It actually came out pretty good but I may do another one because the head that I polished had some damage from a failed spark plug. The machine shop said it was repairable but I'm thinking of starting over. Go to my channel to see the results.
I have just watched this video for the 17th time and cannot thank you enough. You have given me the confidence to get on the tools and have a go at porting some Honda d16y8 heads I have. Keep doing your thing mate, and thanks again all the way from Australia 👍
Aight so what happened
I just finished tearing down a DISI MZR and will be doing a port and polish(wanna help that gt3071r flow better) and I just want to thank you so much. You explain things so clearly and you're right to the point. I look forward to seeing more content from you.
Awesome video man. My 2.0T ecotec Saab recently jumped time and bent my valves. Swapped heads for another known good head. Now I have a spare in need of a rebuild, which lead me to your video. Feel much more confident in taking on this port and polish job, and actually really excited to get started now. Thanks for documenting this!!
This is what I call a true bombass job. Took your time. Didn’t rush anything and what results you achieved. Damn proud, damn proud of your work. Looks like something I would do myself. This is serious OCDing at it’s finest! 👍🏻👍🏻😊Most impressive young one, most impressive!
Very nice work and not because it's shiny.
From the sight of my limited experience and knowledge i would have reduced the lateral bumps on the valves guides and widened the ports a bit just here.
it would help the flow since it's a restriction zone caused by the valves and guides.
widening the port here would compensate a bit for that.
Maybe i would have rounded a bit more the squish angle to limitate detonation since you said it's a high compression engine.
because of the forced induction the squish turbulence is not a big necessity i think.
you have quite a nice tumble on a 4 valves cylinder.
It may help you next time : i use a vacuum cleaner with a fuel hose taped to it that i plunge in the port that i'm working on to suck the debris when i grind (especially the exhaut ports)
it works very good to see what i'm doing and to limitate the tools to clog.
Very nice work again.
Thank you for showing that.
It's really interesting.
Good point on the vacuuming of debris. I have seen awesome basement woodshops with central vac system to get rid of all that annoying sawdust. Now that stuff is annoying, but much more important to get rid of metals and such. Glad he wore a mask.
I keep coming back to this video ever time I need to understand what I'm doing wrong so I thank you so much for taking your time to make this video
As an engine builder I still smile when I see a polished intake port ! Polishing a port slows down flow, we worked this out in the 1960s , you have just lost power ! Ports are rough cast for a reason , it is the cheap way to induce turbulence in the flow at the port surface , the ideal port would be smooth with small holes drilled about 3 mm apart, just like a golf ball, it is the same principal , a totally smooth ball only goes half as far as one with little holes all over it, the reason being air flow over the surface of the ball , the holes make little vorticies that make air flow more , same as an intake port , sure the factory can cast super smooth ports , but they know they need disturbance for flow.
What about the carbon?
@@turbosloth8575 what about carbon ? If you have carbon in the intake port you got more problems than good flow !
Egr and direct injection and loads of carbon
So I didn't stumble across this I was looking for info on porting and polishing for my 2013 R1...because it doesn't have enough power for me. That's a complete joke, it has more power than I need. By the time I was finished with the video I moved on and watched the seat cutting video just because you are freakin hilarious! Thanks for the informative video and congrats on the ability to articulate your thoughts so smoothly and concisely while having an awesome sense of humor. I am not subscribed to many channels but, yours and Car Audio Fabrication's channel are the two smartest (and entertaining) I have seen. Glad you found your calling of making youtube videos. I truly enjoy it. I have pictures of my wife's stock R1 rims that I am polishing and I open them from time to time when the world is too sad and they make me smile. :-) I polish the dumbest crap just because I can. Lol
Melvin Weeks Hi! Thanks! Welcome aboard! I too am now a subscriber to Car Audio Fabrication's channel because of your tip. Good stuff! R1 not having enough power… lol.
I'm not a machinist, but I certainly have a new respect for all the hard work y'all do. I've spent years around performance cars, and I've seen the finished products from port work, but it was very neat to see it happening, and Im glad I watched the whole thing.
Thank you for taping, editing, and uploading this video. I'm still not going to try this myself.
I have watched this whole video series on my second time through. Such good information to absorb. Not only well done man, but thank you for going through such lengths to get this put together for everyone else.
Best video on UA-cam mate. Big respect for this something I've wanted to see for a long time. Thank You 🤝👍👍🙌
The arguments of rough vs smooth and turbulence being good or bad are due to a misunderstanding of aerodynamics. There are two main types of drag; skin friction drag and form drag. For something shaped like a golf ball, the dominant form of drag is form drag due to the detachment of the boundary layer. The dimples in the golf ball promote turbulence in the boundary layer which keeps it attached longer. This reduces form drag and thus, total drag on the golf ball.
For something shaped like an airplane wing in cruise, the dominate form of drag is skin friction, so you want as smooth a surface as possible. This is why recessed rivets are used on planes; it reduces skin friction.
For an intake port, I suspect the argument could go either way. At low throttle settings/RPM, rough port surfaces may help keep the boundary layer attached and increase airflow (and thus torque down low). At high RPM/throttle, the flow may detach anyway and it's better to reduce skin friction. This all would depend on the particular port geometry and engine though, so it's impossible to definitively say one or the other is always "best".
Yup my mind fights itself a lot on this topic my friend and I used to port our small cc 2 stroke engines they were carbureted so to get a better fuel/air mix we left the intakes coarse and everything else as shiny as we could get
Seemed to work great but the placebo effect always does hahaha
It was fun and I would do it again ;)
Air over air is less turbulent on non polished ports. Polished intake ports can cause air to speed up and bounce around causing negative flow behind the valve. Also important the main purpose of the engine such as drag racing only the roof of the port will flow, sides and bottom port dont factor. The purpose to polish the combustion chambers and exhaust ports is to reduce carbon buildup that ultimately reduces surface area.
When i polished my bikes exhaust ports i took plenty of pictures and literally showed them to anybody.
I might have a problem.
Love your comment. Same here lol.
don’t be that guy
The 1st port I ported was completely ruined. My mentor let me do that to show me what not to do.
It was a junk head.
first watched this video over a decade ago and it is still one of my favorties on the topic. I referenced all of your Head videos when rebuilding my vr6 and was so happy with the outcome.
Had to leave one more comment that really was one of the most detailed and fantastic videos I've seen on UA-cam.keep it up
OMG! The attetion to detail! Great work man!! :D:D
Watched the whole vid - Thanks - I'm now inspired to apply all lessons to my stock original 35k miles R5 GT turbo
Earned a sub from me 8 years later. You’re incredibly knowledgeable
Thank you for taking the time to explain what and why you are doing the things you are doing. I have a spare cylinder head for my Saab, i will give this a try now!
Sensei, master, doctor, all this you are! New sub, phenomenal contribution.
I can only imagine your idea of a stage 3,4 or 5 port polish is.
You can use as a telescope
Haha right!
Enjoyed your video. I did this when I was 19 and working as a finisher in an aluminum and magnesium foundry. We must have done a dozen sets of heads for V8 engines on our lunch breaks over time. Back then they were all cast iron heads. That was 50 years ago!
You documented and Explained what and why you were doing it in easy to understand term's. you took the boredom out of what usually is a tedious job to watch...
well done and Thanks I am one more step closer to my PhD in porting and Polish.
Now on to the 2nd phase of the course..The hands on part.
PEACE and Blessing to you and yours.
2 Million views even if it is 6 years old is saying a lot. outstanding.
That was great work, mirror-like finish and all. too bad it will never be seen on the inside of the engine.
Yeah, true that! Lol. I'd love to see this same head after a week of running it in....... I bet a good car wash would last longer! However if your looking to kill/waste time, have at it bro!
i have learned so much watching your videos man thanks, i have done everything step by step that you have done with great results.
If my my suffering and persistence has given you a sense of pride and satisfaction in the work performed by your own hands, then it's YOU who is the success story. Your gratitude will forever be appreciated! :)
Hey thanks again buddy i really appreciate you sharing your knowledge, also looking forward to new videos in the future
Great job Maestro. Next weekend Im going to do same job on my Lincoln 5.4 Dohc heads. As you said , it takes a lot of time but when you see the end result , you getting some kind of satisfaction .
No annoying music, comment with the touch of humor and under mechanical aspects? Well explained. A very fast 1/2 hour. Thx 4 it : )
I have an old set of knock off weld racing wheels on my foxbody they were hazy and chemical stained but one day I sat down with a mothers power cone for about 7 hours and shined all four to a complete mirror shine. After I saw what I could do I polished my intake and the stainless steel exhaust tips ... I was so proud
FrostyCoug lol... those aren't for me. They're for the machinists that do all my machine work. Showing up with coffee and donuts is how I get my parts in and out of their shop faster than anyone else. ;) Whenever you see that place roll by, it's foreshadowing to a part being re-engineered to my specifications without showing it happening. I've illustrated it in several other videos. Always show up at the in-laws and at the machine shop with a token of appreciation. :P
Brendan Raymond Just never walk in backwards with a attitude. It will never go well anywhere.
***** Boundary layer turbulence is about helping the air make the turn into the chamber itself by keeping the boundary layer consistent throughout the radius of the port itself which prevents the air from "sticking", which creates deeper level turbulence. If you would like to learn more about the topic, it's called fluid dynamics. Not assuming that you don't know about it, just sharing in case you don't.
That is why you would want to keep the intake port a little rough. The fuel argument as you pointed out is invalid. It's about helping the air break up and to not be "sticky".
Joe11Blue Hi Joe, so what roughness do you recommend. 80 grit? 120 grit? Just curious :-)
I would say 120, but 80 would be fine, too... as long as the surface is uniform the full length of the port, that's about as much as you can ask for with a DIY job. I say 120 because the texture it leaves is easier to SEE as you're working than 80 is. After you're done with the 80, you'll be able to see where you made mistakes as the texture changes. The sandpaper the 120 grit rolls are made from is thinner and more flexible, so you can actually smooth and reach places that you would damage trying to grind with the coarse grits. Going beyond that anywhere else in the port is splitting hairs for 1-3% potential.
***** I apologize for not immediately subscribing - some comfort at least... I subscribed after watching the second video LOL.
Great videos, awesome advice, respect
Third time I'm watching this video. Remembering more and more by every time and learning alot! Thank you for sharing this. I may be doing this to a 531 cylinder head for a volvo b230e engine that I'm upgrading :3. Oh and I'm studying vehicle mechanics. Sincerely, Oscar.
I did enjoy the whole video. I think you did a phenomenal job sir. If only all mechanics are like you, then our engines would sure run and flow way better. Seeing how much time and effort to get this job done right, those CNC ported engine internals asking price for their products makes sense now. But I think doing it yourself makes it more fun, and would definitely give a lot of lessons along the way. Patience is indeed a a virtue.
I would have loved to seen dyno before and after polishing :/
nick f Clearly you’ve never ported a head
@nick f more then u got for painting your gas lid
nick f this makes a pretty big difference esp if your running a bigger cam. I have a 2008 trx700xx I bought the other weekend that I put a stage three cam, black diamond valves/springs, and a 12.1 JE Piston but failed to clean the head up which had carbon build-up all in the exhaust side and the chamber wasn’t all that great neither was the intake but me not having the tools at the time I was working on it I just went head and slapped it back together. Now I can’t really tune it to get all I can get out of it because my heads are so dirty. ANYTHING dealing with how fuel/air flows makes a big difference especially with a high performance engine because it’s gonna need more fuel to turn it regardless. You must not know too much about motors lol.
Polishing doesn't improve performance, this has been shown time and time again. In fact having the inlet polished can make things worse. Port shape is the important parameter, not surface finish.
@@ferrumignis Surface finish makes big differences around the port... Dimped or rough surfaces change laminar flow, this causes air/fuel to tumble or flow considerable better or worse. The reason most cars don't come like that, even race cars is because its extremely time consuming for very very small result, but from a numbers point it shows.
Blown away. Mad Props dude, thorough with not only what to do but what to look for as you're doing it. So well done, wish I could hit multiple thumbs ups. Crazy good video!
The consistent sarcasm and honesty from this video is immaculate
Even though I’ve done this plenty of times over the years as a motorcycle mechanic/racer I just couldn’t switch it off. It was a great video. Thanks for a refresher course as it’s been a while and I am getting ready to do a set of Mopar 440 heads and it was definitely worth the time for an old mechanic like myself even if just so I remover the stuff I need to buy to be able to keep working instead of running to town for something I forgot to buy.
I love how you mentioned that surface texture only matters for carb setups.
Wow man, thanks a lot for putting this up and being sooo to the point. I have a prelude vtec head sitting in my basement with a ton of dremel stuff too, so this is my research part.
posted four and a half years ago and im just finding this now. Very informative! Thank you!
Did these methods on my 535cc single cylinder motorcycle. Thanks for the video. Definitely boosted performance by night & day ❤️
I have just reported this video to youtube as hardcore porn.
+bingoberra18 28:26 ... how did that not get flagged??
Hey Jafro, i know its probably no big deal but the little pot holes in the casting in the ports can be filled with JB or some sort of epoxy, let to harden, then blended in with the rest of the port work.
Its commonly done on SBC and BBC heads when they tube them. Tubing Its an old trick where they would actually port into the water jacket on purpose, press in a tube and epoxy it in.
There is a guy here on youtube that is the only one Ive ever seen do it. Ive only heard about it before in school at UTi and seen the heads done but never watched someone do it until this one guy, he is an old timer and knows his shit. His channel is Headbytes porting I think. He is a cool dude. Check him out if you get a chance. Ive learned a few things from him. Its always good to learn from the old guys!
This wealth of knowledge was so informative and a joy to watch. The right decision for you to film and narrate this.
This is the greatest video I have ever watched, you put so much work into this I can’t believe watching this was free!!
He sounds mad while being happy, exciting, and enthusiastic. His logical and intelligent commentary is the most honest and real world advice you can listen to.
3 things to do....
1: subscribe to your channel. Done!
2: watch the rest of your posts.
3: do all the stuff you've done on your engine.
Goodbye friends, see you all in about 3 months....
The full detail and explanation for this video is unlike anything I have ever watched. This should be used in Mechanics classes for the fact that the commentary on a personal level is what kept my attention aside from wondering how this head would turn out. I am about to purchase some cylinder heads for my LS1 and I was wondering how this was done. Great job on the full description, it seemed like you never ran out of breath.
You sir are the owner of the finest 1.6l Elantra head in country if not the world! Don’t know how many people have taken the time to love up their 91 Elantra like this
Thank you for your honest and accurate assessment! Not many people with Elantras are making 5 times the horsepower this head was designed to produce. You should see what I'm doing to it next... Nobody else would ever do it. Not by themselves.
this video made me work on a old itr integra head I had.... now I'm about to get. into a cnc machining course because of it...... also my wife was furious at me cause I was so in to this video lol
Rodolfo Munoz
Women aye. Cant please em
its always about them isn't it. they can't enjoy life and want you miserable with them
What's happened to me? I used to be a musician, but now I'm watching exhaustive polishing videos of parts of my car that no one will ever see!! Why am I obsessed with this stuff? That's rhetorical
+Stacy McMillan What happened to me? I used to be a musician, but now I'm making exhaustive polishing videos of parts of my car that only people on UA-cam will ever see. Why am I obsessed with this stuff? That's the second chorus.
+Jafromobile Same thing over here, i used to be a garage guitar player, a good boyfriend, a guy who liked to go with friends and having a beer on friday night! But instead i watched 32 mins of your video, making my first head job in my Tercel head and Can't wait to go to the junk yard and find a Toyota 5E-FE head and start polish and porting it to put on my little Tercel 3E Block... Then boost it! :D
Regards from Honduras!
+Jafromobile visit w
Rhetorical or not, you're a musician, that implies great brain functions, engineering is only a few blocks away, could've been architecture, or medicine. I know a doctor who started his high school (europe) with architecture in mind, got awfully bored (as he put it) and switched mid Uni to medicine.
Fun to go to the track with a stock appearing engine and clean house:) The real power is in quality porting on the inside not the bling on the outside.
Holy shit, I needed to be asleep an hour ago. But I'm glad I watched every second of this. Probably the best video I've ever watched. Thank you for that.
super addicting video. great content, info, and edit. props. oh and great lookin job. did my first port and polish on 7mgte head in the bath tub. three dremels later, cross eyed, but totaly worth it.
I've spent more time than that on a single cylinder 2 stroke. Good video.
So have I you could have eaten out of the ports on my cylinder
This is the first of your videos I have watched. It is excellent and I really enjoyed it. Great information, great editing, and excellent verbal presentation. Really impressive. Thanks for posting.
***** Oh man… I hope your schedule is clear. This is the format all of my videos follow. You're about to lose your entire weekend here. Thank you for sharing and welcome aboard! :) b
I never got crazy results from the heads, but when I polished the inside of aluminum intake manifolds on Subarus, WOW. Every time it's like a different car completely, you can't help but giggle when you mash the pedal.💯
I use to work at a machine shop doing minor clean ups on engines and cylinder heads, way back in the 90's. This inspires me to get back into it.
Excellent video!
This is the third time I am watching this video. Your explanation skills are so good. This video does not get boring. When I started watching it the first time I was like, Oh no another 30 min video which could've been 10 mins. Boy was I wrong. Keep up[ the good work. Thanks to you I've been able to mega bling my head and am currently working on the ports.
Your comment is well written and I honestly appreciate your rebuttal.
Thanks for taking the time and effort to offer a better explanation
+Jafromobile You need to have your PayPal listed in the descriptions of these videos! Not in an asking for handouts type thing, but I have never found a more in-depth tutorial, that is well edited and great commentary. I would gladly donate for each video that's helped me. That way you can buy more parts and post more videos! It's a Win/Win!
6:52 agreed 1000000% !!! Oh man I remeber the feeling. Anything laying around (keys, knives, exhaust tips, etc.) , everything must shine, even some old bolt in parts bin. Just for the heck.lol
Absolutely loved this video. Well delivered information in an entertaining way. After watching this im definitely getting myself a dremel set up. I'm building a 1UZ for my 91 SC400 or Soarer as we call them here in Australia.
Will definitely be coming back to re-watch this when I start my heads.
The best video on UA-cam after all these years
VERY INFORMATIVE! AND ENTERTAINING 🤓😂YOU'RE THE BEST! THANK YOU SOOOO MUCH!👍🏻
Thank you for this video!!!! After watching it I did a bit more research and then did a P&P job on my STI heads. It consumed much more time that I initially thought, 40-60 hrs, but in the end I feel my throttle response is amazing and power curve is much smoother. I'm helping my buddy do a P&P on his built KA24 and I told him to watch your head series in prep. Good work on this video my friend!!!
You see... this right here. This is why I do this. Personal satisfaction... community... and someone took an idea and produced results they can be proud of. This is what makes my efforts worthwhile. I never wanted to be the definitive guide to porting, I wanted to just be one of the voices. You did it right! You gathered the ideas of many to determine your path, and produced results that you can FEEL. You can't put a price tag on that. You did it. I keep telling people I really only make motivational videos, not instructional videos... I always get back blank stares. Not everybody understands that. Nobody learns anything from watching my videos, they don't learn anything until they go and do the work. You graduated! I'm proud of you, man!
as teenage in the 70s I started to hot rod the stock 327 in my 68 Camaro R/S that had a powerglide tranny. I did a basic top end rebuild only, nothing done to the block. took the heads off and gave em a valve job valves were good nuff but new springs, lifters P-rods, added valve seals, i bought a paper back publication out at the time on hot rodding a chevy enginee, they had one for mopar ford etc etc. i read that thing constantly over and over but there was a small sub chapter on the heads chapter on porting and polishing that had a lot of common sense info that made me think long and hard, they had things like matching the ports on the intake/heads to the intake gasket and the same on the the exhaust side of the heads to the exhaust manifold. after putting a gasket on the intake and exhaust side of the head I was flabbergasted as the far off they were, 1/8th was the norm but there were places it was a 1/4 inch, fuel didn't *flow* from the intake-->head and into the combustion chamber. it was more like white water rapids. I read the port/polish section and did it my self, after a few weeks I burned through 3 dremel tools and piles of grinding stones, I didn't go as far as polishing but brought the intake to head to the exact size of the gasket, same on the exhaust side so there was a virtual seamless flow of fuel mixture going in the head and seamless flow of exhausar gas going out of the heads. other modifications were a smoothing out the walls in the the intake and exhaust chambers. there was a generic casting bump in theintake sid eof the head that all heads had the needed smoothing out. i was a time consuming job to say the least but it only cost me $120 or so. then i sent the heads of to the machine shop, putting the engine back together i installed a Crane Fireball cam, hooker headers, eldebrock spread bore alum intake and a holley 650 spread bore carb and a new hot distributor and big ass yellow coil. I swear lighting came out of that engine and it was a nite-n-day with the DIY upgrades i did, jeez that car a low end pep I never thought i'd get with the work i did and I'm convinced matching the intake/exhaust ports to the intake and headers and the work done had a definite effect I wouldn't have seen not doing it.
i had a friend down the beach who was a die hard mopar head, he had gotten a 440 charger, with that big air foil on the back. he had gotten his engine back from ft lauder dale when he had it professionally rebuilt like me from stock but his stock 440 hemi was leaps and bounds above my little 210hp stock 327 i rebuilt myself in the garage. he caught me at the pier, where all the kids hang, he pulled up next tom camaro and reved his engine and challenged me to a 1/4 race... for a $100. the few guys hearing this started yelling to everyone tom and john were gonna line em up!!! i was seriously intimidated and finally had to agree to it, but no money. by the time we were lined up there must have been 60 onlookers, my good friends I can always count on them sticking by me, bless em the said johns 440 is gonna bury you.
I was thinking the same, but when the rubber met the road I got the jump on him right out of the hole, but as my friends said he would bury me and it was a burial..... my little 327 hit the finish line with 3-4 car lengths over his 440!!. he demanded a another bite at the apple citing shifter probs or oil pressure lol... and again my 327 buried his 400 over 2 cars lengths. within 4 yrs he sold off the charger, super bee and all his mopars and invested in a 68 camaro, and never challenged me to another race.
i still think back of how much of an much edge I got with my home grown port/polish job i did on that 327.
I learned a lot from this video years ago when I did my own port and polish. Now years later I just wanted a refresher on polishing metal and I forgot how much I love this guy! around the 16:15 mark is hilarious! and true.. hahaha. Appreciate your work and this video! I've literally watched this video from start to end probably 10 or more times! Great work man!
wow... best video i ever watched in my life! Thanks!