Precision Valve Spring Install
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- čas přidán 23. 07. 2021
- How do you nail the right seat pressure on every single valve? Watch me do the whole job here. The math is in the video. The tools are in the video. The process is in the video. I detail how you use all of this to nail the seat pressure that's recommended by your camshaft's manufacturer. You may buy valve springs that are rated for X install height at Y pressure, but that doesn't mean they'll produce that result once you install them in your head. It's your job to fill that gap and do it right. This is how.
If you'd like to directly impact what I do here, consider supporting my production on Patreon. / jafromobile
I show tricks for simply skipping all the retainer tip height math, how to find and adjust your spring install height, how to use the differences in manufacturing tolerances of every individual part to your advantage, and once again I prove that even Microsoft Excel is also an engine building tool. You've seen me use it before for other things. As usual, I just made this spreadsheet up as I went along. Added extra stuff to it for options and alternatives. Showed you all the formulas so you could figure out how to make one of your own. I spent about 4 hours making it pretty enough for video, but it probably saved me 20 hours with a paper and pencil, and of course a whole lot of mistakes. If you employ a spreadsheet to help you do the math correctly, then your only responsibility is keeping it in sync with your work. It's useless to you if you get out of sync.
Do not recommend places for me to host the file. I'm not interested in connecting my identity to a public download page, and all of the free ones expire. Anyone doing this and claiming to be me is a fake.
The Proform 66776 Valve Spring Tester is around $650-$700 shipped. At least it was when I bought it in the middle of the pandemic. Holy cow I got ripped.
www.google.com/search?q=profo...
The Goodson Valve Stem Height Gauge is about $270 shipped.
goodson.com/collections/measu...
I would advise you to shop around for the 3-2-1 blocks. Some are extremely expensive, and depending on the kind of work you do, you may or may not need certified and registered blocks, but mine weren't, and I checked the with my calibrated micrometers to find they're spot on. They're easy to find.
The Mitutoyo 129-127 0-4" depth micrometer was around $170 + shipping.
www.google.com/search?q=Mitut...
The Mitutoyo 500-196-30 0-6" .0005" resolution calipers were $132 shipped new. I pretty much got ripped there, too.
We all know the Harbor Freight calipers are under $20.
www.harborfreight.com/6-in-di...
We also know the Stearlite 7240 ice cube tray.
www.sterilite.com/SelectProduc...
Springs I used were Kiggly Street Steel
Kelford TX 264 Camshafts
Many people will probably think after watching this that they have to get their valve installation right to the thousandth of an inch like I did. They don't. The engine will run fine if they're off by a few thousandths. Wear over time will even cause the spring loads to drop slightly. The goal here is to get as even of a starting point as you can. What you watch me do isn't something most machinists are willing to trouble themselves with, but with the aide of the offset digital calipers, the math was so easy, why not spend the extra time showing you how if it's your thing?
As each valve opens and closes, it transfers its spring load onto the cam lobe, and therefore the bound and rebound pressure into the camshaft. All I did here is make every valve play the same exact beat. By equalizing the valve spring pressure, you normalize the vibrations caused by the valvetrain. You don't eliminate it, you just make it all the same, and you try to just make as much vibration with them as they need.
Seat pressure is a slippery slope. I won't give you a rule of thumb other than to say to use *at least the minimum seat pressure specified by the camshaft manufacturer*, make sure you have enough headroom to avoid spring bind, and if you're going to run ridiculous boost pressures, your valve spring seat pressures need to go up or else you risk blowing your intake valves open. If you unnecessarily increase the seat pressure beyond what's required, you shorten the life of the valvetrain. Too little seat pressure even on stock boost levels can cause valve float (blowing them open). There is a razor's edge for perfection. HOW you USE the ENGINE determines the sweet spot, and within 10% above minimum seat pressure, you're typically safe. I spent 10 hours doing this job with 3 cameras and abbreviated as much as I could. I hope this example can help others make good decisions setting up their own valve trains. - Auta a dopravní prostředky
![How To Lap Valves, Spring Height Micrometer, and Reface Valve Stems [EXPLAINED]](http://i.ytimg.com/vi/ziPg0qUF4Lg/mqdefault.jpg)
Beautifully shot and explained Jafro. Incredible effort and documented for everyone to enjoy and learn from. 👍🏻👍🏻
Magnificently viewed and liked Tom! You know you get to drive this when I finish it...
@@Jafromobile Whoa! Gladly!! 😀👍🏻👍🏻
@@TomsTurboGarage make it happen! You drive his DSM, and he drives your Tacoma. Tom and Jafro do a track day perhaps?
this engine will be an antique by time he finishes. a perfectly maintained antique.
It was an antique when I started! 😂
@@Jafromobile Don't remind Rocky he is a old man like that! haha
jafro is really building an million km engine, never heard anyone doing a rebuild on this level of accuracy. seen so many sloppy rebuilds on youtube that this is a little overwhelming. Love it though, so keep up the good work!
To be honest, this level of detail is something I've never even been able to achieve. No machinist has ever provided it for me (yet). Your assessment is 100% accurate. There are just so many jobs like this where if you want it, you have to do it. It feels good to finally have an example like this in my stable... and of all the cars in my driveway, this is precisely the one car that deserves this kind of treatment the most. I couldn't have done this for this car without Abe, or without Patreon. I feel like it's an important part of #1229's history.
Hagerty gets close! There is a place for sloppy builds but I love this level of building even more!
@@Jafromobile "There are just so many jobs like this where if you want it, you have to do it." That is one of the reasons I admire your channel and the way it documents your outstanding work. Thanks for sharing as usual.
Perfect, I can link this in my much less detailed installed height video.
P.S. the trimmed calipers... so good!
Greg, you need a dsm! 😅
@@AWD_T So I can experience engines that actually make some power 😅 I'm still amazed at the port size on those engines especially after watching Turbo Tom's builds
@@TheCarPassionChannel haha Yeah for sure! It's one of the best 4 cylinders ever made. Although I do think the K series is the best, but you didn't hear that from me lol.
@@TheCarPassionChannel I have a Miata and a Galant, what more could you want honestly :^)
hey glad to know that you watch Jafro!
Excellent detail. For someone who’s learning excel by only the inter webs and using them for work purposes, this is motivation in both realms. I can’t wait to get one of my project cars done to then be able to tear apart my daily and build its motor. All motivated and mentally made possible from years past of Jafromobile.
It's people like you that I made this video for. You have the motivation. The reason. This won't just help you build cars.
Hint: click A1. Type "1". Press return. Type "2". Press return. Type "3". Press return. Select "1, 2, 3". Copy. Press and hold "Command" or "Ctrl" [Mac/Win]. Click the lower right corner of your selection and drag down.
It works with calculated fields. Calculations and cells get auto-filled for you. Check your references in calculations that occur outside of the row or column you're working it, but otherwise you only need to type each calculation once. The trick above works horizontally (average fields) and vertically (Hi/Lo).
What’s better for a rainy Sunday morning than a Jafro’s video. Keep up the great work!
There’s a lot of other “professional” CZcams channels that would do well by watching these videos. Well done! Appreciate the time that put into your vids. Thank you!
Love getting a Jafro notification!!!!
Oh my, where did that 40min go?! I just love it how you explain anything. And by the look of it, your beard grew 2 inches in the time that it took you to measure and re-organize everything a thousand times LOL. Man with patience, must love it! Keep safe and see you on the next episode!
Thank the lord he has blessed us with a video.
I didn't expect the Excel flex! That spread sheet would put engineering firms to shame.
I know, it's weird, isn't it? Excel, the automotive tool. There's practical reasons to make a spreadsheet application part of your build, especially if it saves you time and effort, or produces results like this!
I was sweating trying to figure out where to get these tools in the video. I'm about to do the same job. Luckily Jafro is looking out for us and has a link for the ice cube tray. Thanks bro!
:D
If even only one person got it, it was a success! 🥚
Well demonstrated and meticulous as expected. Thanks for always taking the time to show the importance of making things perfect!
Very cool. I never thought about setting up a valve train so the springe pressure is optimized. Thank you!
Jafro: meticulously measuring and installing his valve train.
Me:hasn't even checked the lash on my civic in 10+ years...
😂 True! Seat pressure ≠ lash, though. Perhaps you should get a hydraulic valvetrain that doesn't require lash adjustment? Before they're all gone. wink wink.
@@Jafromobile I already have one(hydraulic valve train) in my Galaxie :p
You're doing the Lord's work...
Still watching, inspired, and learning in 2021. Thank you for all the time you put in.
Amazing video. I love this kind of detail work. Just wish I was good at getting started on it, hah.
Could host the Excel sheet on Google Drive with shared link for free. Make a burner account if worried about security.
Not saying you have to, or that most viewers will even actually need it, but just a thought.
Great work as always. Above and beyond. Can't wait to hear this beast run.
The most prevalent examples we have in the past when people distribute excel-based tools and give them away for free, they become exploited, and it ultimately results in controversy and/or lawsuits. If I can give you the idea to build the thing that makes your life easy, then I've done something even better than giving you the tool for free, and separated myself from all of that controversy and liability.
I'm confident that everyone who's balanced seat pressures on any valvetrain sees how much better this works than a pencil or a calculator ever could. There's enough differences in valve trains that justify people making this kind of thing specific to their build, it helps the builder stay focused with so many parts to keep track of. Also knowing how the spreadsheet works is an important part of troubleshooting, and if should something go wrong copying and pasting, there's no better way to get to know how to fix it than having built it.
Sometimes the things that qualify as automotive tools are in your office, and you have to get them dirty, too. Sometimes introducing your angle grinder to your digital calipers is an improvement. Both of these are examples of laziness, but without them, it's much harder to achieve this good of a result. There are too many parallels of this example in real life.
@@Jafromobile Great points of course. A shame people will take advantage of others with their own foolishness. You're right though, teach a man to balance seat pressure, he eats for a lifetime, or something like that.
@@Jafromobile give a man a fish vs teaching that man how to fish
As an IT guy professionally and a car in my free time, I love the use of excel here! Excel is like a super power for nearly any task.
Balancing the valve train height is a massive effort. It's the kind of effort that I am really happy to watch you do so I know exactly what I can't take the time to do. Perhaps some day, when I find the right engine, but for now my builds are going to be beat to death on the track anyway.
This one's going in an ol' girl that can't handle the abuse. Well... she could, but we don't need to put 'er through all that. This one's the Evo's grandma, and we're going to keep her around to watch all her little Evos grow old. This is all about senior care.
Just as i checked patreon for the first time in like 2 months
Win!
Good work! I was excited to see the Goodson equipment being used as they are a local company in my town of Winona, MN and I actually made that engraved base the parts sit on. I work in a small CNC shop and we manufacture parts for Goodson all the time. Very cool to see it all come full circle on your video!
I love hearing this! Thank you for contributing your time and effort to a tool that I love and will use on every single one of these cars! I specifically sought this tool and bought it over alternatives because it was made here. Never expected one of my subscribers helped make it! lol!
I love how detailed your videos are jafro! 10 years later and us dsm'ers all stuck to the same parts...wonderin if you're gonna put a mighty max ofh for the convenience...
You can only explain so much. It’s still up to the individual to step up and do theirs. What a job Jafro! You have patience others only dream of. One thing at a time and no compromise is a tall order for some, but that’s definitely not your problem. It was well worth the wait to see this. Anyone who doesn’t get it, well it’s still not your fault. Cheers Jafro! Bring on the next video! Stay safe mates!😊👍🏻😷
I like the spring tester. A bathroom scale and a caliper to check things are within spec then throw straight in for lesser worthy heads.
That's essentially what this spring tester is... I'm sure it uses a strain gauge the same way... has a caliper bolted on. Really, it seems we both are using the same method!
Late night, lying on the bed, 00.00 AM here. Saw jafro's new upload, my sleep can wait for 40 min.
And you awake to Jafro wishing you a glorious day!
Jafro I'm sorry it took me 4 weeks to watch this. I really enjoy everyone of your videos. It has been just as or even more indepth than my automotive college classes. I always recommend your channel to people who ask me questions and I will absolutely not hesitate to pull up your videos when I plan to do something myself that I don't already know 100% (which is often). So so glad to have found your channel, and the best part is I don't even own a DSM. I don't even work with a 4G63. I got a totally different 4 cylinder, but I know the same methods transfer.
As a bearded man that likes flannel, I approve of the new and improved jafro look happening. I'm also digging the live as you work commentey spliced in with the scripted voice over. If I could I would have been supporting you with patron from they you started using it. One day when I finally get a dsm I'm going to be armed with to much knowledge
funny “How ya doin” at the beginning
Hell yeah!! Jafro time!!
Screw personal time with the wife, I'll be watching this video instead
Appreciate the time you take to make these videos Jafro, hope you're doing well!
Muchas gracias mi amigo! I worked hard on this one, and I don't do it for the algorithms. It's hard to edit content like this and make it feel natural.
What a balanced presentation!
Jafro for President!!!
Love it... easy to understand and got some ideas... now to dive deeper into Excel because I could never create that spread sheet on my own.
Love seeing my name in the patreon credits...you make me feel like a star! In reality you are the Super Star! Watching a man in control of their own project, you are at the mad scientist level. I LOVE IT! I know some of what you do would put some to sleep, but your methodical nature is super impressive and awesome, please keep it up.
More stuff i don't fully understand but delivered in a friendly informative manner. I'm in 👍
you should add a column for rocker weight
haha this is interesting! I just got a 1965 283 I am looking at springs for my heads. End goal is 9500rpm and 250-300hp. Will place it in a CRX Or a Rx-7. Loving your videos a lot. head porting and polishing was great!
It's easy to lose sight of just how large the ports are on the early 4G's. same as the GEN-2 3SGTE. they're massive
Wow, the depth in this. Thank you
I see video, I like. Brilliant work.
I still watch even though I don't have a dsm anymore there getting expensive
i appreciate your perfectionism
Awesome! Nice to know somebody else likes to make spreadsheets also 😀
When you were talking about your low to high calculation in your spreadsheet you weren’t isolating your static variable and might have been selecting it every time instead of just dragging the whole column.
In case you don’t know when you select a cell for your formula say A12, if you change that to $A12 you can drag the formula left to right and that variable will always stay in “A”. Similarly if you say A$12 you can drag that formula up and down and that variable I’ll always stay on row 12. Finally you can stack both $A$12 to basically make that variable “static” and never change value no matter where you drag the formula.
Super handy concept for calculator sheets like there where you may have an input table of constants used all over a sheet. Though in that case you can also name the cell and use it that way.
Real valvetrain blueprinting ✅
A "balanced" cylinder head. This is kinda freaky isn't it?
Great beard, great spreadsheet, great video (as always)! Looking forward to the next one.
jafro is back!!
Based on the views of this video, you'd never guess it. I'm rather certain my channel is being squelched by some snowflake at the Googleplex.
@@Jafromobile for sure I didn’t get the notification but it popped up today in recommended. Always enjoy your stuff can’t wait for the restoration!!
@@Jafromobile Hey hey whoa whoa
Now the puzzle is a little more clear🤗
Must... leave... only... 1... peg... on... the... board...!!!!
what the actual fuck! You made a 4g63 with fricking aston martin levels of quality. this is insane!
Yes. Yes I dd. Yes, it is. Might be a first? One lucky Galant.
Great work my man! Watched every detail with my full attention span! One thing I noticed and would make a recommendation on is when you grind on those seats and measure them while still hot, hopefully not hot enough that thermal expansion changes the measurement! I would’ve recommend you soak em in some like warm water to bring them back to atmospheric temp, but if they didn’t blister your fingers from touch, I don’t think the change will be drastic enough to worry about. Just another perfectionists insight and slight ocd at work! Haha love the videos man
You're making an absolutely valuable point, but it's one I did consider. The expansion rate of steel is .000006 of an inch, per 1 degree F, per INCH of material. Even a 200°F shift wouldn't show up on these calipers because the thing is only .040"-ish to start out with. But the event you're describing is indeed happening. It just doesn't show up in the .001" range.
Ahhh I'm now content after getting my jafro fix
I'm glad we got to spend this time together, too!
👋👋👋 can't wait to see more material soon. Keep it up hope you r well.
My inner geek is comming out !!!!!
Awesome work!!
sensei at it again! 🙏
I have never been this early ever!!! You took way too long to release a new video brother!
I know. I wish it could have been different. If you knew everything else I've had to do, you'd be surprised I already uploaded.
New Jafro!!
This is super A+, I got a few constructive criticisms if you don't mind.
You're fondling those keepers,stems,springs etc like I fondled your mum!! Every +10 deg/F is ten thou (except for stainlesseseses and nickel alloys/super-alloys like Hastelloy and other industrial specific stuff like CPO shafting in hydraulicsThat doesn't seem like much, but if you're in a semi-heated garage (40deg on an October night),with you being north of 6 foot 3,your hands are going to totally envelope those tiny stems and the variance of assembly length can easily introduce enough statistical deviation into the few tens of thou (and variance is std dev ^2).
That measuring thing is pretty lulzskie. You're in the 'linear' region between like 80 and 120 (probably way more). All you need is two numbers, like 100 and 80 lb of compression and you can safely extrapolate your compression k-factor. Once the 'slack' is taken up on the loose-end (I duno..40lb), those helical springs will linearly k proportionally to F (presuming the honeycomb diameter decrease is constant).
Fun fact--bearing press fits onto shafts are best done by cooling the bearing gradually (so as not to introduce shock) and then shaft slip down--if you do the oven thermal thing, you fuck with the temper. Been watchin ya for years. You and Superfast Matt are the best ever.
this sets a precedence
Thank u sir and hello from West Virginia
Regular machinists: Installs arch linux
Jafro: Linux from scratch
I feel like its the only equivalent im able to draw if youre an IT guy
LOL! Fair comparison!
Jafro watches Steven Lavimoniere?! 🤣🤣🤣 That's awesome. "Give it the ol' how ya' doin' mamma."
I have now! 😂 Watched him fix a toilet. I swear, everyone has more subscribers than me. lol!
Always excellent
Thanks man! This is the luckiest Galant, ever.
It'd be interesting to use a torque wrench to determine how much torque it takes to turn the crank shaft before and after doing this, and maybe each cam individually. Maybe you could use a dial indicator to measure walk on the cams too, idk if it'd be possible to detect variation.
aww yeah! Time to get my nerd on :D
Thanks, man !
I always love these detailed informations :)
One thing I couldn't help but notice - if I may - you seem to have a compressor effect on your audio or some kind of noisefilter. And it works great a lot of the time. But in a setting where you're talking a lot - and let's ve honest, that's what you do and what we love you for - it's distracting and even anoying hearing the noise desapear in every pause and come back in the background when you talk again. I'd prefer it without the noise filter in that case :)
It's what naturally happens to the audio when you accelerate it. It knocks out half the info you made an audio track with when you accelerate to 200%. Sections of the video are at 1600% and sometimes 3200%. So you can imagine even when I gain it up +3db for each section where it's 200%, at higher speeds there's so little data left in the audio that it sounds like compression, but it's just dropped "audio frames". At normal speed, you can hear the air filter running in the clean room, but at 1600%, you can't, no matter how much I gain it up when it's accelerated. Does that sound like what you're describing? I don't use any noise filtering... but there's an actual air filter running in the background.
@@Jafromobile oh, that's why it sounds like that, I didn't know. Well, then consider my complaint invalid xD anyway great video as always :)
it can be done
The Mad Scientist
Locked away in his Lab
Gathering the intricate parts
Creating his Monster...
Well said!
Jafro jafro maaaan I want to be a jafro man
I'm a sucker for minutia, but how realistic is this level of detail for a street build. Not being negative, I'm actually a beginner just trying to learn. I also love spreadsheets...so great job! I will try to recreate yours! Btw, you can have the cells change their own color based on the result of a formula or cell input.
Almost non-existent. Even in performance builds, really. Nobody strives for this level of detail as I mentioned in the video... I only did it to prove you could. What's more, over time the springs degrade, so this is something that won't be the same after a few thousand miles anyway. It's just closer to perfect as a starting point. Which of course can't ever be a bad thing, so... If someone goes through this trouble, or simply just buys the measurement tools, they achieve greater accuracy than 95% of DIY'ers who install valve springs.
@@Jafromobile not sure what your formula issue was but you can try locking the column and row to a particular cell by using a dollar sign ahead of either or both (e.g. $H$34) in your formula cells and that may allow the copy and paste process to stay un-wonky
@@Jafromobile you did have some pretty significant outliers, at least numerically if not practically. Seems like a good practice just to get them closer to be balanced even if you use the spreadsheet just to get to a closer set of tolerances. Thanks for the video!
Let me guess, Jafro is an engineer
Nope. IT guy. Studied petrochemical engineering in college, but became IT guy. IT guy with Macs, cameras and AV equipment. ...and apparently a hell of a lot of free time.
I was surprised you didn't have a Mitutoyo set of calipers or something at least a little bit fancy but then...
Great looking spreadsheet tool! Are you providing that tool for others to download? Thanks!
Jafromoble 😎
Yessir!
Do valve springs lose their pressure (power)?
Every time you stop an engine, various valves are at
different degrees of open- meaning their springs are compressed.
Does leaving an engine unturned for X time cause spring wear?
I wonder for how long? Once rebound is lost, does it return?
What does temperature do to already tempered steel? Cold & hot.
I've always been fascinated by Koenigsegg Freevalve.
Such a beautiful (to me) concept. Such precise control!
Uhhhhh I know atleast that the temps in an engine are nowhere near enough to affect steel temper. As for the rest I could only make educated guesses.
I actually did this last week. However my target was distance to coil bind versus seat pressure. I don't have a spring checker, so I used a 20$ vice and two sacrificial spring seats and eerily similarly cut offset Chinese calipers. At the end of the day you're not going to gain much shuffling every single seat and retainer assembly to get it zeroed across the board. Maybe I missed it, why didn't you use a spring install height micrometer? This is the main tool I used. Great investment. Maybe I missed that part of the video
That tool doesn't fit. Lots of overhead valvetrain engines have recessed spring pockets that make using that tool impossible. If that's how you set up your springs then I'm betting you're running a boatload of boost and winning a whole lot of money between rebuilds. For a street car that you want to last a long time, you're better off hitting the minimum seat pressure rather than spring bind. It's just a friction thing. These valve springs offer a lot more headroom than most others do, but the right spring pressure and height rating. Bind is less of a concern for me because of this, but the car will be a gasoline burner with only slightly higher boost than stock so this exercise isn't about making power at all, but is for performance. It's for the longest life and smoothest operation aspect of performance. When I build something burning methanol, I will use your method, too!
@@Jafromobile unfortunate about the tool not fitting. I actually chucked mine up on a lathe to turn down the knob to make it fit between the radius of the head on cylinders 1, 2, 7, and 8.
I still disagree on methodology though. I'm not going to pretend I'm smart enough to win an argument with regards to which way is right- so I'll just say I got my info and procedure directly from the head of valve spring development for Comp cams as well as the nationally recognized engine builder who did my head's cnc program. I was given a target distance from coil bind and then told to verify coil bind distance with my max lift. The actual coil bind varies (+0/-.050) so that last .050 needs to be measured. I asked if it this is due to the fact that the new springs I got are conical (versus my previous build's dual spring). I was told that the seat pressure affixation of the past was due to older manufacturing methods that had wildly varying spring loads along the length of travel. Could it be because of the differences in spring pressure? Possibly, the springs are much higher force than what your specs showed (Comp 7230) but that would just be guessing on my part.
No high boost/ race application. This is for a street car/ road course built NA car making 730 on pump gas (and a net gain of 30 peak with just the spring setup change. Crazy what valve stability will do.
Your method is correct for that equipment. 730hp is no mousey motor, and their reasoning is sound. The pressure needed with your application is just at the upper end of the recommended spring's specs is all. Either that or at an acceptable pressure above it. That's why they're measuring it from bind. In my case, the springs are much heavier than I need them to be at spring bind. 50 pounds heavier. But they're not the wrong springs. They fit the gap at the correct seat pressure. These springs can handle more lift than I'm giving them, and be used for a wide range of cam profiles at different installed pressures by shimming them (up to .150" from where I am). If I needed to throw 30-50 PSI at it instead of 20, naturally I'd need to bump it up a bit. Whenever a manufacturer's installation gives a different target to strive for than seat pressure, follow those instructions instead. That same rule applies to everything in the aftermarket vs. your service manual. There's nothing to argue about, you totally did it right.
Always great information!
Is the double-neck yours?
I wish I could afford a Gibson EDS-1275! Real ones like that start at $9,000. I would tune the shit out of it if it were mine! It's like the Shelby Cobra of guitars. Speaking of which... go to gt40 dotcom. Click guitars. Look at the Gulf colored #6.
so, I have a DOHC 24V V6 with dual nested valve springs....ouch!
Can you operate this tool to compress the spring with one hand? I noticed it's different from the previous version, which had a wheel instead of two arms.
Dear very interesting video 🤔 “In every day, there are 1,440 minutes. That means we have 1,440 daily opportunities to make a
positive impact.”😃
Hey Jafro can you put the straight cut oil pump gears in the MD175762 front case? I have heard that you can't and that you can. I would like to keep my straight cut gears to reduce the thrust load. Is there actually a difference between MD175762 and MD129347 front cases?
I have two complete 1g dsm n/a 4g63 eclipse in my yard. You can come pick them up free Jafro. Not running.
Why not use a spring height checker tool?
Recessed valvetrain. No room to operate it. Those only work when the valve spring is not recessed into the head. They're fantastic tools wherever you're able to use them, but many engines disqualify themselves by design. It's not a design flaw, there are advantages to both. The tooling just changes is all.
So just to simplify it for myself, you are essentially balancing the valves train so each combustion chamber reacts as close to being exactly the same as the others? Exact amount of air/fuel in with all exhaust valves pushing out at the exact same volume?
Engineering is not my forte so bare with me.
Actually this won't affect airflow at all. The airflow characteristics would be the same at any seat pressure unless there isn't enough spring pressure to keep the valves closed. The valves will still open and close the same and at the right times no matter how tight or unevenly they're set up. What this is for... is balancing the friction of the cam lobes contacting the spring-loaded valves. If the pressures are equal, then the torsional vibrations experienced by every thing connected to the valvetrain during opening and closing events will be reduced. This normalizes torsional vibrations in the camshaft during valve opening and closing events so they're are all of the same amplitude, and no "louder" than they need to be. Everything else in any engine is connected to the valvetrain by a belt or chain. I suppose this would be beneficial if you're doing other things to maximize air/fuel as it should benefit high RPM situations, but I hope this explanation makes more sense. It's okay to make power and be smooth at the same time.
@@Jafromobile So this is purely for balancing then and increasing efficiency at higher (and lower) RPM. As I imagine un needed vibration would cause un due wear and decrease efficiency?
oh somebody grew "Lockdown Beard" :D
It's future mandate protection.
Where do you get That spreadsheet program? Cost?
💪👍💯
What grit wheel did you use for grinding? Thx
Coarse. I guess it's around 80-120 grit? Having a texture on it is a good thing. It helps 'em stay put. They're smooth to start with, but the shims come textured on both sides for the exact same reason... so it shouldn't matter at all if the spring seats are, too.
How many hours is involved in that process sir ??? I do not think you will see this
Having a vise within a vise ... could that be considered "Adele Weiss"?
Ein Weiterer vice.
Do you share that Excell sheet?
Google docs you can post a document to share
High five.
If you get put out by how many valves you had to do think about how at least it isn't a hemi V-8
let's see what this is about
Hey buddy we hung out a few years ago at the shootout! Just thought I’d let you know I got a new build (90 PANDA) are you on social media?
"too melty" - added to dictionary
I wish the kid I work with who thinks he is "Such a pro" could take some pointers from this video.
Also thanks for the amazing content I was actually watching one of your vids and it started the itch to buy yet another dsm lol mark #992.3
I just realize how fucked up my valve train after watching this video.
now i became paranoid everytime i drive my build.
i used to rev 10k without a care.