I hope Miata owners realize how lucky we are to have Greg Peters. It can’t be easy to sink this much time into videos to share hard earned knowledge. I will like literally every video you ever put out before I even watch it because of how helpful I have found the content over the years.
I've counted you saying the word "valve" 101 times. Take it with a grain of salt tho, there's been about a dozen times where I either blacked out and wondered if you said the word or wondering what number I was at.
As an engineering student I love your palatable example of cons of energy and Newton’s second law and how they apply to our hobby. Can’t wait to see the results of the rebuild!
Just bought a clapped out 92 and I'm building a street monster out of her. Your channel has helped me out so much already and I know it's going to help so much more
Greg have you ever thought about pursuing a career in aviation maintenance? You have a great base knowledge of proper practices and an eye for accuracy. It could be a fulfilling, great paying avenue for your skill set.
Greg was so flexing on us with all those big brain calculatory calculations. My brain melted trying to keep up with it. 😅 🤣 Nobody...... Greg..... E=∆•√0.009÷(0.98+∆) +{yXπ} +0.98= you need stiffer springs.
Hope all is well with you. I read your response in the comments that you're getting a breather and that work is busy. It's good. We all need it on occasions. Just started a FM Turbo install a few days ago on a 2003 Shinsen Version. About half way through it now. Your videos helped a great bit both informationally, and inspirationally! Wanted you to know that YOU did that. Someone completely across the country from you. Thank you for what you do, man!
i just got this recommended. it's one of the best video regarding head (re)building tutorials. amazing job on explaining imperial and metric(tho you should just keep it metric). this channel should grow a lot, i'm happy to be here before 10k subs.
This has to be the most complicated and confusing topic you have tried to explain lol Thanks for making this video and explaining in details about head
Damn, this video contains so much information. I'm impressed how much research you have done. I finally know why reving higher need so much effort. Also, editing is always a blast in your videos, the mustang clip made me laugh loud!
You are an absolute beast with those explanations!! thank you for that! This video thru me back to university I had to watch it twice to get it :D It would be awesome if you will share what seat pressure is needed for what level of boost, and if there is any way of figureing out what is my current valves seat pressure without measuring each valve assembly
You asked people to comment what they drive and what they are building so here it is. I've got a 2014 MX5 NC3 and its currently at BBR getting the stage two turbo kit and coil-overs. Brakes and tyre's next then I'll be going for wheels and paint restoration. Service items and an underseal is on the list too. What happens next is anybody's guess.
Hi I’m new to the channel…I drive a 2012 pathfinder…I’m not building anything because I’m a single dad with 2 boys but some day I hope to build a 60’s-70’s street rod or truck…God willing of course!…I’m almost 50…I love watching all the car building shows
3 days ago my NA had its 30th birthday, and it has stayed stock apart from a few cosmetic items (wood steering wheel, gear knob, handbrake handle, new wheels, new tan top, KG instrument cluster). Totally reliable!
Absolutely invaluable stuff you are doing for us Miata NB nuts. Mines currently in the shop, swapping a 1.6 for a 1.8, reconditioned and reflowed and then supercharged. I am a sparky, so mechanically I have zero idea whats happening therefore I cannot express enough how much im learning about engines here.
New to the channel. Used to have a miata, now I'm wrenching on a factory five roadster. just converted to full sequential in megasquirt(full engine harness rebuild), I've got one thing to fix before I can try to start it up.
Hey Greg, awesome video as per usual! One thing I was thinking of as you were talking about the amount of boost pushing on the valve. A lot of technical videos talk about boost being a measurement of resistance in the engines ability to breathe. With that in mind, if you were to optimise and increase the airflow (not pressure) in and out of the engine, then in theory, you could run the same power at lower boost, which means less force acting on the valve train. That being said, I guess you’d need to measure the airflow in and the airflow out of the engine, as optimising one over the other could impact the force on the intake and exhaust springs. Just some food for thought, as I know when I looked at Borg Warner turbos of a similar size, they seemed to require a lot more boost pressure than say a g25-550 to achieve the same power.
Boost pressure is a measure of restriction, correct. Airflow does make power, boost pressure is a result of restriction. So if you were making more power at lower boost you could technically run a softer spring but I would not think about that very much, just use the right springs. You're talking about +/- a few psi, if your springs are at the limit like that you should run something stiffer anyways. As far as the EFR vs G25-550, I can't say I agree at least between similar setups (the G25-550's closest relative is the EFR6758). In Miataland, most of the time you see any car taking 28-32+psi to break into the 400's it's because it's either a 1.6L or it has a more restrictive intake or exhaust system. With proper intake/exhaust manifolds on a 99+ 1.8L either one of those turbos should be in the low 400's in the 21-24psi range. So when you're doing your research just remember that the engine that the turbo is bolted onto might be the reason it takes a lot more boost pressure to make power, and might not be the turbo itself. That being said, the new G series turbos have an incredibly efficient compressor.
What I love about my rx7 FD, is the simplicity of the engine compared to any modern 4l or V6 Mine is air bolt ons, power FC ECU, getting 320 on the wheel , the rpm is limited now to 8300 might increase it if I tuned the car for the summer
I’m bout to own a 90 300zx z32 2 + 2 na! Picking up the car Wednesday if everything goes well. Plan on building a custom exhaust, roll cage, and intake cause I own most the things to build that. I own a hydraulic pipe bender, lathe, and milling machine
As usual you come through with critical information. I'll be going to 400 on my na miata and I'm sure I'll have to address the head. Thanks again miata pops.!!!
Great video Greg, Yes that all makes sense. I expected the new springs to be longer and lighter and I am so pleased to have been right. I think it is an improvement in the spring dynamics?
They came from an experienced head builder who explained to me that seat pressure is far more important than "over the nose" pressure aka pressure at max lift. These will also be available for sale soon so I'll come back to this video and pin a comment with a link when that happens
Shim under bucket was the hardest part of my full build. Porting was easier...lol This is valuable information that I know i appreciate a bunch for the next miata build I do.
I just love how well let's just say it how nerdy you are when it comes to engines. Yay for science :)))) Love the video very nice explanation and easy to follow for me at least. Can't wait for the next one. But no pressure ;P Edit: Big big big thanks for the metric units!!!
dude literally your just in FUCKING TIME. becauze im about to pull my head off soon. its nice to know im not the only one stuck in the garage. I hear everyone hooning out and im sweating under my hood lol. Thats Life, you know thats what all the people say. xD.
I'd recommend a video showing the valves exposed at 14k rpm, at that high rpm they start to skip and start to rotate (Edit: Didn't saw the part where you showed the video I referenced above)
I'm kinda new, I was watching you around 5 years ago, then the YT feed took over to flat earth debunk and other topics I drive 2001 rx7 s8 fd And my daily is Lexus gs350 2013 Enjoy
I counted 116 instances of the word "*valve*", though it could be perhaps as much as 120 since I only partially took your advice at the start of the video.
Oof, that's a lot of maths... I thought I was smart when I removed/disassembled the lifters on my '96 1.8 to clean and re prime them with fresh oil to nix the lifter tic. Sheesh... Great info, buddy. Well done!
I’m late to the party but why stay with a standard spring. I would figure a beehive style would give you two added benefits of lighter weight valvetrain and better harmonics. They would cost more and be harder to find one with the correct specs but I’m sure they are out there.
Will defiantly be using this information on my NB1 when it gets its rebuild/turbo kit done but its running like a top ATM so doing a JDM inspired aero package upgrade on the outside first... and as always love the videos
No units were used in the example, but if you were using m/s for the velocity yes the resulting acceleration would be m/s/s. Another valid unit could have been mi/h if you're really into the bald eagles, which would have resulted in absurd acceleration units of mi/h/s which is also valid but literally never used. I omitted units in order to reduce confusion, but it might have had the opposite effect, lol.
@@TheCarPassionChannel no no, it's really clear and understandable! me and my friends are rebuilding a bp6d and a b6 and we're into the valve regulation. this video is really gold :D
Greg: always delving deeper into specifics and niche Miata information. MCM: making redundant videos explaining basic idiot car guy info for the last 8 years. Keep it going Greg and your channel won't incur the same shameful fate
You must be one of the smoothbrains that finds "how to change your own oil" videos profoundly interesting. Have fun paying shops diagnostic fees the rest of your life.
Math is understandable as long as I know what the fuck it’s for in this video I understood 100% but at school where they just write numbers on a board it looses me almost instantly
put the spring in the vice and squeeze it all the way down take that measurement and minus it from your installed height let's say you had and installed height of 1.600 and a coil bind of 1.100 that would leave you .500 and now let's say your camshaft lift is .450 that leaves you .050 to coil bind some spring manufacturers give you what they want you to have before coil bind clearance it helps with the harmonic of the spring
So I just purchased a Miata here in Phx az turns out it was your broke and boosted Miata its in pretty rough shape I hope in time I could restore it to its glory days.
Hey Greg! I own a 2000 nb miata and I was thinking about doing a FM happy meal upgrade to my clutch. Some people I've heard say that they notice a difference in the acceleration in the car and some don't. Could you make a Dyno day video where you compare clutch weights? I'd love to see if there is any difference!!
Not gonna lie, sometimes its taking me a year+ to finally understand this stuff but im always glad i took the time and watched it thru even when i was like .. WTF
![The ULTIMATE GUIDE To Maxing Out A Turbo! [Compressor Maps Explained, Speed Gauge Install]](http://i.ytimg.com/vi/TUMbW6_-xX4/mqdefault.jpg)
![The ULTIMATE GUIDE To Maxing Out A Turbo! [Compressor Maps Explained, Speed Gauge Install]](/img/tr.png)
![Save Money And Lap Your Own Valves! [Measured Results]](/img/n.gif)
I hope Miata owners realize how lucky we are to have Greg Peters. It can’t be easy to sink this much time into videos to share hard earned knowledge. I will like literally every video you ever put out before I even watch it because of how helpful I have found the content over the years.
Thank you man!!!
This, for real
2am was going to bed... not anymore!
I was lucky i just saw it after a good night sleep.
Suddenly all the kids in school who thought math was useless got reeaal quiet
😂😂
me who struggled at math am sweating right now...
Were getting 25 minutes of head bois
o.0
Won't be the last video on heads
Most of us won't last till the end of it🤣🤣🤣
@@Razvy800 ngl I had to watch 2 separate times
Force = Mass x Accelaration = Miata is always the answer
I've counted you saying the word "valve" 101 times. Take it with a grain of salt tho, there's been about a dozen times where I either blacked out and wondered if you said the word or wondering what number I was at.
Definitely didn’t check halfway through to see if I accidentally clicked on an engineering explained video 😂😂 awesome video Greg!!
That cut through video of the valve train at 13:33. It's amazing anything survives longer than a lap!
As an engineering student I love your palatable example of cons of energy and Newton’s second law and how they apply to our hobby. Can’t wait to see the results of the rebuild!
This is prefect timing! I just finished cleaning my NB2’s engine bay! This is a well deserved break lol. Thanks Greg.
Just bought a clapped out 92 and I'm building a street monster out of her. Your channel has helped me out so much already and I know it's going to help so much more
Greg has taught me so much about the internals of an engine. Thanks for showing me how things work. 🙏
Greg have you ever thought about pursuing a career in aviation maintenance? You have a great base knowledge of proper practices and an eye for accuracy. It could be a fulfilling, great paying avenue for your skill set.
Greg was so flexing on us with all those big brain calculatory calculations.
My brain melted trying to keep up with it. 😅
🤣 Nobody......
Greg..... E=∆•√0.009÷(0.98+∆) +{yXπ}
+0.98= you need stiffer springs.
Hope all is well with you. I read your response in the comments that you're getting a breather and that work is busy. It's good. We all need it on occasions.
Just started a FM Turbo install a few days ago on a 2003 Shinsen Version. About half way through it now. Your videos helped a great bit both informationally, and inspirationally! Wanted you to know that YOU did that. Someone completely across the country from you. Thank you for what you do, man!
i just got this recommended. it's one of the best video regarding head (re)building tutorials. amazing job on explaining imperial and metric(tho you should just keep it metric).
this channel should grow a lot, i'm happy to be here before 10k subs.
Thank you for being here before 10k subs 🙏
Thank for this video, from a 2002 owner.
Who disliked dads new video ? Gonna have to have a chat to them about this behaviour . Thanks creigh for the content as always
I've always felt like I have lacked knowledge when it comes to the logistics of heads. This broke it down so easy and it all made sense. Thank you.
This has to be the most complicated and confusing topic you have tried to explain lol
Thanks for making this video and explaining in details about head
Love what you do here Greg, keep it up!! (From a friendly viewer in the UK!)
Damn, this video contains so much information. I'm impressed how much research you have done.
I finally know why reving higher need so much effort.
Also, editing is always a blast in your videos, the mustang clip made me laugh loud!
Love these videos, don’t have a miata, but I take so many of these videos and use them to understand my L28E in my 83 280zx!
That's what I like to hear!
You are an absolute beast with those explanations!! thank you for that! This video thru me back to university I had to watch it twice to get it :D
It would be awesome if you will share what seat pressure is needed for what level of boost, and if there is any way of figureing out what is my current valves seat pressure without measuring each valve assembly
You asked people to comment what they drive and what they are building so here it is. I've got a 2014 MX5 NC3 and its currently at BBR getting the stage two turbo kit and coil-overs. Brakes and tyre's next then I'll be going for wheels and paint restoration. Service items and an underseal is on the list too. What happens next is anybody's guess.
I don't even have a Miata! Your channel rocks. You'd be a credit to the Lotus community if you ever decided to jump in one. Love this video!
I am working on the unloved 5SFE engine in my MR2. Just wait for the head to come back from the machine shop.
Hi I’m new to the channel…I drive a 2012 pathfinder…I’m not building anything because I’m a single dad with 2 boys but some day I hope to build a 60’s-70’s street rod or truck…God willing of course!…I’m almost 50…I love watching all the car building shows
The UA-cam videos we make and watch because who else teaches this to the masses? How easy life would be taking any class you want
Miata dad back at it again!!!
I have a 90hp NA and it will stay stock (has rollover bar and steeringwheel) 99% sure but man, il feel this videos are so usefull i love them!
3 days ago my NA had its 30th birthday, and it has stayed stock apart from a few cosmetic items (wood steering wheel, gear knob, handbrake handle, new wheels, new tan top, KG instrument cluster). Totally reliable!
Don't even have a miata any more but still subbed to support the quality educational content you produce. Keep it up my dude
Absolutely invaluable stuff you are doing for us Miata NB nuts. Mines currently in the shop, swapping a 1.6 for a 1.8, reconditioned and reflowed and then supercharged. I am a sparky, so mechanically I have zero idea whats happening therefore I cannot express enough how much im learning about engines here.
New to the channel. Used to have a miata, now I'm wrenching on a factory five roadster. just converted to full sequential in megasquirt(full engine harness rebuild), I've got one thing to fix before I can try to start it up.
'91 NA6 new to me :)
1 point 6 gang!
Thank you so much for explaining everything. I learned alot from your videos. You made it eyto understand ❤
Hey Greg, awesome video as per usual! One thing I was thinking of as you were talking about the amount of boost pushing on the valve. A lot of technical videos talk about boost being a measurement of resistance in the engines ability to breathe. With that in mind, if you were to optimise and increase the airflow (not pressure) in and out of the engine, then in theory, you could run the same power at lower boost, which means less force acting on the valve train.
That being said, I guess you’d need to measure the airflow in and the airflow out of the engine, as optimising one over the other could impact the force on the intake and exhaust springs. Just some food for thought, as I know when I looked at Borg Warner turbos of a similar size, they seemed to require a lot more boost pressure than say a g25-550 to achieve the same power.
Boost pressure is a measure of restriction, correct. Airflow does make power, boost pressure is a result of restriction. So if you were making more power at lower boost you could technically run a softer spring but I would not think about that very much, just use the right springs. You're talking about +/- a few psi, if your springs are at the limit like that you should run something stiffer anyways.
As far as the EFR vs G25-550, I can't say I agree at least between similar setups (the G25-550's closest relative is the EFR6758). In Miataland, most of the time you see any car taking 28-32+psi to break into the 400's it's because it's either a 1.6L or it has a more restrictive intake or exhaust system. With proper intake/exhaust manifolds on a 99+ 1.8L either one of those turbos should be in the low 400's in the 21-24psi range. So when you're doing your research just remember that the engine that the turbo is bolted onto might be the reason it takes a lot more boost pressure to make power, and might not be the turbo itself. That being said, the new G series turbos have an incredibly efficient compressor.
What I love about my rx7 FD, is the simplicity of the engine compared to any modern 4l or V6
Mine is air bolt ons, power FC ECU, getting 320 on the wheel , the rpm is limited now to 8300 might increase it if I tuned the car for the summer
Good info here. Used to work in a machine shop a long time ago and this kinda takes me back.
I checked your channel early today with no new uploads and now this... yessssss it’s 2am but really it’s car passion time boiiii
Daily a 2015 Elantra, and Sunday drive a 1986 300zx GLL. Eventually going for 400hp to the wheels
Flying miata valve compressor works awesome
I’m bout to own a 90 300zx z32 2 + 2 na! Picking up the car Wednesday if everything goes well. Plan on building a custom exhaust, roll cage, and intake cause I own most the things to build that. I own a hydraulic pipe bender, lathe, and milling machine
I'd love to see the same measurements taken on the Supertech light and heavy doubles.
I'm sure someone must have done it, and I also think the super tech seat pressures are listed by some sites who sell them
I drive a 1990 Miata, no power (yet) but all the fun
As usual you come through with critical information. I'll be going to 400 on my na miata and I'm sure I'll have to address the head. Thanks again miata pops.!!!
Bruh!!!! Love the math vids. I cant wait to see it all back together.
GORG!
Gonna be honest, the springs in the vice seems SKETCH.
Great video Greg, Yes that all makes sense. I expected the new springs to be longer and lighter and I am so pleased to have been right. I think it is an improvement in the spring dynamics?
They came from an experienced head builder who explained to me that seat pressure is far more important than "over the nose" pressure aka pressure at max lift. These will also be available for sale soon so I'll come back to this video and pin a comment with a link when that happens
Yes talk nerdy to me Craig
Thanks dad! Been looking forward to this one!!
Shim under bucket was the hardest part of my full build. Porting was easier...lol This is valuable information that I know i appreciate a bunch for the next miata build I do.
What part specifically is difficult? I've never done a SUB conversion myself so tell me what I'm in for, hahaha
My favorite UA-cam creator collaborating with my favorite tuning shop one in Cal one in Germany. Love it! Miata community for the win!❤️
Same here. Weather i do things by myself, or have SPS doing it, which are located 3 hrs Autobahn away :)
1981 Volvo 240! Currently building a prepped NA engine for it :)
I just love how well let's just say it how nerdy you are when it comes to engines. Yay for science :)))) Love the video very nice explanation and easy to follow for me at least. Can't wait for the next one. But no pressure ;P
Edit: Big big big thanks for the metric units!!!
dude literally your just in FUCKING TIME. becauze im about to pull my head off soon.
its nice to know im not the only one stuck in the garage.
I hear everyone hooning out and im sweating under my hood lol.
Thats Life, you know thats what all the people say.
xD.
I’m here dad
I'd recommend a video showing the valves exposed at 14k rpm, at that high rpm they start to skip and start to rotate
(Edit: Didn't saw the part where you showed the video I referenced above)
Great content. Is not common see that topics explained on a easy and simply way.
Greg where are you? I need th eCar Passion Channel
In the future can you do a k swap Miata video on why People should or shouldnt
Just did a head gasket job on my NA6 last weekend. It all went fine but wish I had this knowledge before😭.
Check out lisle tool 36050, absolute time saver! Amazing ease of use for any work you have to do with valves
Mate at 5:44 I'm sure I saw a crack in the casting 🤔
I'm kinda new, I was watching you around 5 years ago, then the YT feed took over to flat earth debunk and other topics
I drive 2001 rx7 s8 fd
And my daily is Lexus gs350 2013
Enjoy
I counted 116 instances of the word "*valve*", though it could be perhaps as much as 120 since I only partially took your advice at the start of the video.
Yess I'm so glad someone counted
New here, building a 2003 bugeye wrx wagon.
Oof, that's a lot of maths... I thought I was smart when I removed/disassembled the lifters on my '96 1.8 to clean and re prime them with fresh oil to nix the lifter tic. Sheesh... Great info, buddy. Well done!
sooo much info, love it!
I’m late to the party but why stay with a standard spring. I would figure a beehive style would give you two added benefits of lighter weight valvetrain and better harmonics. They would cost more and be harder to find one with the correct specs but I’m sure they are out there.
95 m edition Miata. Ready for a rebuild still with original motor
Love the vids, and definitely not new to the channel but I drive an 83 celica. Even without a Miata your videos are super helpful and informative.
Thanks for your time and effort Greg ,,Good video as always !
Will defiantly be using this information on my NB1 when it gets its rebuild/turbo kit done but its running like a top ATM so doing a JDM inspired aero package upgrade on the outside first... and as always love the videos
great video, the only thing is that Acceleration is in m/s^2 ;)
No units were used in the example, but if you were using m/s for the velocity yes the resulting acceleration would be m/s/s. Another valid unit could have been mi/h if you're really into the bald eagles, which would have resulted in absurd acceleration units of mi/h/s which is also valid but literally never used. I omitted units in order to reduce confusion, but it might have had the opposite effect, lol.
@@TheCarPassionChannel no no, it's really clear and understandable! me and my friends are rebuilding a bp6d and a b6 and we're into the valve regulation. this video is really gold :D
Did you every tried a rotary ?
Why don't you try it?
I think it gonna be piece of cake to you with that experience
Greg: talks about the NB build
Me: YOU TEASING ME U NAUGHTY NAUGHTYYY.
For real tho pls don't leave us hanging for too long thank uuuuu
Hahaha don't worry my man, it's only because I have to get my NA running so I have a car to drive while I take the NB apart LOL
pretty much any machine shop is just going to "rip you off" and not do any math at all
Greg: always delving deeper into specifics and niche Miata information.
MCM: making redundant videos explaining basic idiot car guy info for the last 8 years.
Keep it going Greg and your channel won't incur the same shameful fate
Now say it without crying
You must be one of the smoothbrains that finds "how to change your own oil" videos profoundly interesting. Have fun paying shops diagnostic fees the rest of your life.
Im an aroused engineer but gotta reckon there was some turn off elements but anyway it's really crazy how much you can learn from internet nowadays
The "me drive a mustang" and dislike earned this video a like.
Thats what we like to call “going full fenske”
Love your videos. Own a 94 SM. Selling my s2000 to buy an NC mX-5 cup car.
metric for life
Where the videos at brotha???
Amazing video!
Math is understandable as long as I know what the fuck it’s for in this video I understood 100% but at school where they just write numbers on a board it looses me almost instantly
You need to check your coil bind hight you need around .060 clearance
Are you saying at full lift there needs to be an additional 0.060" of valve travel before coil bind?
put the spring in the vice and squeeze it all the way down take that measurement and minus it from your installed height let's say you had and installed height of 1.600 and a coil bind of 1.100 that would leave you .500 and now let's say your camshaft lift is .450 that leaves you .050 to coil bind some spring manufacturers give you what they want you to have before coil bind clearance it helps with the harmonic of the spring
Driving 2018 ND, building a ND junkyard engine for more boost!!!!!!!!!!!!!
Bruh, you lost me when you started with the math... lol fml
So I just purchased a Miata here in Phx az turns out it was your broke and boosted Miata its in pretty rough shape I hope in time I could restore it to its glory days.
Keep me posted!
Dude hope you are alive n' well? It's been a while..
Hey Greg! I own a 2000 nb miata and I was thinking about doing a FM happy meal upgrade to my clutch. Some people I've heard say that they notice a difference in the acceleration in the car and some don't. Could you make a Dyno day video where you compare clutch weights? I'd love to see if there is any difference!!
Not gonna lie, sometimes its taking me a year+ to finally understand this stuff but im always glad i took the time and watched it thru even when i was like .. WTF
At 5:43 I'm sure it's something else but kinda looks like a crack is forming?
Cries in sr20 rocker arms ..
quite interesting videos you have done what are you talking about the cylinder of the car I put like
Lets gooo! Just in time for me to do mine :)
Can you please try indexing a set of plugs since you have the head off? Then do dyno back to back and see if it makes anything happen?
Is this relating to the direction the arc faces in relation to the intake charge? I've never heard of it but it sounds intriguing
@@TheCarPassionChannel yes exactly
Fd can wait