man I've seen cam index all over the place. I've started doing all 8 cylinders in high dollar engines. I've seen as much as 6deg variance from a well known cam company. This particular engine kept burning up #6 piston and after beating my head against the wall trying to figure out why I figured out the cam timing was all over the place. Great video brother.
@@powellmachineinc Yes absolutely. Good point. Especially when you have lifter location off AND cam index issues. Stacked tolerances become a nightmare. BHJ got my money for the fixtures and I'm guilty of letting them collect dust LOL.
The bigger the company....the less they care. I have stopped using the name brands and gone to the little shops like yours, I will be using you from ow on! Thanks for sharing with us!
Wow! That’s terrible that manufacturers have gotten the “that’s good enough” or the “they’ll never know” attitude. I don’t why I’m surprised cause it seems pride and quality almost seem to be a myth anymore. You sir are one of a dying breed of people who really care about doing things to the best of your ability which imo is very impressive. Thank you for showing us your findings cause seeing it and being able to hypothesize what’s causing it is information that people that have no knowledge of machine work can understand. I can see myself doing business with you in the future
Great video! Really cool to see a minor tweak on the first lobe grind make a perfect alignment on the second grind. The blue reveals all! Really shocking too that an OEM cam has so much variance on some lobes.
@@powellmachineinc - My first thought when oldsmobile and california are used together is Engle but i know Schneider has some olds grinds too. Not sure who else grinds out of california
I was just about to ask what governs the profile generation when you produced the index plate ,so thanks for that. Whereas small shops will do precision by default , large manufacturers will add a premium for it . Taking pride in your work makes the best quality control.
This information goes right along with the information about the lifter bores. If it isn't right for every cylender it's not going to run its best. Probably will give the tuner issues. Thanks for the information. I believe this along with many other things is why it's best to have one shop or man machining and building the engine.
Morning Daniel. Once again you show us what it's all about. Buyer beware. I echo prior comments. thanks for the info. keep it up. I keep uncovering stuff that isn't right myself. No wonder, I get engine shake during running. It's all about tracing the root of the problem. Thanks for the ideas, as to refining the issues out there.
Really curious if the cam manufacturers are trying to grind the cam assuming that there is some loaded twist in the cam when it’s running , maybe that’s not a thing, I’ve often wondered this about camshaft with heavy spring pressure, thanks for taking the time to make the videos. I really enjoy your channel.👍
Not on these, but gun-drilling (adding another torsional 'wall' through the center) and progressive clocking of the lobes was something I was shown as pro stock/comp eliminator tech. Thats an inch of lift and well over a half-ton spring pressure over the nose, though.
That's like finding out the tooth fairy isn't real. How many people out there have mis-indexed cams? And how do these cams get in the boxes past quality control, especially from well-known companies?
These vids make me wonder why I didn't pay more attention to a buddy of mine years ago who worked in a cam grinding/manufacturing shop. Seemed like he spent a lot of time grinding and installing his Frankenstein cams in his '55 every other weekend. Anyway, is the feed into the stone automatic or are you feeding it manually?
How many of the big companies even use an index plate anymore? I thought everyone by now had CNC grinders like I do. With the wide variety of engines out there these days, with varying lifter angles etc. Do you have to have an index plate for every possible combination? I can think of 5 different BBC lifter angle packages in my head right now, stock, 42-48, 45-50, 42-27, 47-52, etc. I have never seen a machine like yours, its interesting. I can tell you have pride in your work. Keep it up. cw
Do you have a video showing the Set Up of this camshaft grind machine? I'm really curious how you match the lobe profile on the machine for the grinder to follow cam lobe exactly like it does.
@@robtdougherty it's like the grinding wheel setup is riding on an identical lobe profile and degreed in to match the cam lobe 100%. I'm just curious how that is achieved and set up.
As a now retired lifelong Tool & Die Maker that has had a lot of time on cylindrical grinders, I have to ask, how many cams have you wiped out because of interruptions or loss of focus and the index plate did not match the lobe position? Saw a guy grinding a dovetail on a big cast part and he forgot to take the dowel pin out that he was checking over for size. Cylindrical grinders do make for some bad crashes.
That's some interesting machine work and I've always thought this variance was what caused the 'freak' motors that we'd hear about now and then that outperformed others that were supposedly 'identical'. Honda brought a semi-truck load of CBX motorcycles to the local dragstrip back in the day and my buddy test rode each one until the tires were gone while Honda documented all the runs. Then they plotted all the performances and while this did make the classic 'Bell Curve' there was one bike that was faster than all the others and of course one that was bringing up the rear as the slowest one. This was what Honda wanted to see and then disassembled them and very carefully measured everything trying to find out WHY one was faster than all the rest? Was it some minor camshaft timing tweaks that accidentally happened to that one motor? It's such a complex thing within a running motor that each cylinder might very well like a little different timing than the others due to port, intake or exhaust variables. I've only been a subscriber for a few weeks now but have already seen things from Mr Powell that I'm very happy to thank him for showing....much appreciated!!
Is surface hardening an issue after you “touch-up” a cam? I’m a Harley tech and the most common issue with valve trains is the hardened surface flaking off the lifter roller, then eating up the lobe.
No issues, if it were it would be a issue before we ever touched it, as we only remove around .010-.015", what u are seeing is just low quality material and incorrect heat treat
Did you happen to catch Dex channel on the oval bottom cam lobe? You should check it out. Was pretty cool example of what type of issues that could cause
perfect example of why you should get cams custom cut and blueprinted.... when you use quality parts with great machining you will be surprised how inline everything comes... you will notice this when you degree cams in, a very good old school high end engine builder told me that.there's a reason why nascar engine builders d that too sometimes a few extra dollars spent really goes a long way later on
Thanks for explaining the machine & how you create a, "Key" to get results..... Seeing the "key" used reminds me of computers when we were using hollerith cards in tabulating stuff. So if you can create the key to do work in .001 or ,0001 ? I see how if a shop didn't have good "keys" in use they could hurt their customers badly & not even realize it? WoW, ty kind Sir. I'm only 61 but I'm looking at a 2nd Career now...... ty peace
If someone is building a motor, what would it take on their part, to be able to detect what you just found on this cam? Are their tools out there readily available to do the kind of validation required?
Hope you are teaching at least one kid everything you know, in this age of cnc, cad etc finding a real machinist who actually understands his trade is getting damned near impossible. In Yoda's immortal words 'Pass on that which you have learned'.
Can't, even trust the manufacturer. They, charge big money, for inaccurate machining. Takes, a knowledgeable machine shop, to figure out their mistakes.
fascinating video, thanks! that was very interesting, puts some more doubt in my head about cams in general haha but it's todays world. Have a great week.
Is it the manufacturer can’t hire skilled labor or people who want to do their jobs? Are they on their phones? Are there no trades being taught anymore, especially in High School?
After seeing how that first lobe started grinding initially, I though that maybe that was a wear pattern in the lobe. Like the leading/trailing edge that takes the most brunt of holding the pressure of the spring. Then you got to the others and it wasn't a consistent pattern. So maybe it is just a manufacturing defect? Those few degrees they're off should be an acceptable amount for a daily driver. But like you said. It should be as close to perfect as it can be for a high performance application
How many thousands does this take off when you grind the cam. Could you go into the importance and how block imbalance (Siamese) not aligning robs power. How do you fix this problem?
@@powellmachineinc Good. It was just something that came to mind. We used to be required to have our machines laser measured once a year and needed to maintain records for each machine. We did a lot of government and "defense" industry work, though. Hell, we even had random pee tests. LOL. Actually, after going outside to get another beer, I believe the correct term is "Qualified". Something about NMBA? ISO 27 something, something.
No, you would have 3 asymmetrical lobes and 5 symmetrical would you?, also most hyd roller lobes are asymmetrical, but that happens off the bc generally, not below the nose rad.
🔔😎🇺🇸 Just my observation. Variations in common everyday performance cams seems irrelvant because few people will degree them anyway... And if they do, they wont degree them on a dyno to get them exact for the best power. So it seems pretty moot. JMO. THANKS 👍👍 Oh, and what about chain wear and stretch?? Ive seen Cloyes sets retard 2* in 5,000 miles.
@@powellmachineinc Thanks👍 True, the lobes are ground in. But if they're not ILC degreed by Dyno testing to what each individual combination wants, does it really matter much? Higher dollar timing sets should last longer. Some don't. Everyday hot rodders will never tell the difference of cam lobes or chain slack. JME.
Made in the "U.S.A" is a sells pitch. And the upcharge is added because they continue to sell, I'm guilty of it. I'd be happy going without name brand forever and waiting on the shops that does the work. This family is doing real ish, and should be protected from the shit bag scamming POS that only want to get top quality custom parts for free. Might as well place your order and have a EQUALLY PROFESSIONAL ENGINE BUILDER! assemble and run in the engine. Been holding that in for a while.
Must have been made on a Monday. Somones .001 is anothers .0011. Or .2 of a degree is someone's.5. Tolerances are these for a reason and no 2 machines are the same but thats why we have standards. Case in point. Clearly who ever ground that cam has something slightly off and they probably dont even know it. They check all ther cams an they probably all pass inspection because they are taking comparison measurements. From one to the next and not even knowing they are all wrong. P.s., after 23 years as a certified mechanic, i trust nothing........ double or tripple check everything! Yes, its more time consuming but its the only way one will know if its right. Its like a carpenter how has been using the same tape measure for 30 years. Its going to be off. It has to be check on a standard and this clearly is not being done. On that note, how late, or early would that valve be when talking about piston travel? How much breath would that cyclinder loose? I wonder.
Great Job , real i need a custom cam from yor shop . I see your videos , and dont trust in any " big brand" most today that the C__p cams own a lot of old brands .
man I've seen cam index all over the place. I've started doing all 8 cylinders in high dollar engines. I've seen as much as 6deg variance from a well known cam company. This particular engine kept burning up #6 piston and after beating my head against the wall trying to figure out why I figured out the cam timing was all over the place. Great video brother.
Definitely, ty, also don't forget about lifter bore location being off also.
@@powellmachineinc Yes absolutely. Good point. Especially when you have lifter location off AND cam index issues. Stacked tolerances become a nightmare. BHJ got my money for the fixtures and I'm guilty of letting them collect dust LOL.
@@Marksracingengines yeah, some customers just won't pay for all the options
You bring a level of knowledge and insight to those of us that don't know.
Glad it's helpful
A strong man with a gentle touch. Very nice work, highly informative, and much appreciated.
Thank you kindly!
That's the gayest non queer thing I've ever heard
Stop being a weak follower.
Yes, a strong man with a head full of engine knowledge. Don’t think you’d want to arm wrestle this gentleman. He’d put you down in five seconds
@@ellieprice363 One second! 😊
The bigger the company....the less they care. I have stopped using the name brands and gone to the little shops like yours, I will be using you from ow on! Thanks for sharing with us!
We appreciate that 🙏
30 years of Ford specialized training and we never ever talked about this stuff. Great video
Yep
Another instructive video that a layman can understand. Well done, again.
Glad you enjoyed it
Another Example of spending good money with the big companies doe Not mean you get good product. Keep up the GREAT WORK...
Tyvm
Wow! That’s terrible that manufacturers have gotten the “that’s good enough” or the “they’ll never know” attitude. I don’t why I’m surprised cause it seems pride and quality almost seem to be a myth anymore. You sir are one of a dying breed of people who really care about doing things to the best of your ability which imo is very impressive. Thank you for showing us your findings cause seeing it and being able to hypothesize what’s causing it is information that people that have no knowledge of machine work can understand. I can see myself doing business with you in the future
Thank you! We really appreciate you
Great info, this cam series I have really enjoyed. I have really learned a lot .
Glad to hear it!
What an amazing machine and the knowledge to run it.
Tyvm, I really appreciate that!
Thanks Daniel, Maybe videos like this will make some cam manufactures pay attention! Because the customers are better informed!
Absolutely
A lot to learn from this video, thanks.
Glad it was helpful!
Love learning about the details!
Glad it helps!
Great video! Really cool to see a minor tweak on the first lobe grind make a perfect alignment on the second grind. The blue reveals all! Really shocking too that an OEM cam has so much variance on some lobes.
This was a race cam from a grinder in California
@@powellmachineinc - My first thought when oldsmobile and california are used together is Engle but i know Schneider has some olds grinds too. Not sure who else grinds out of california
Where abouts in Cali?
I was just about to ask what governs the profile generation when you produced the index plate ,so thanks for that.
Whereas small shops will do precision by default , large manufacturers will add a premium for it . Taking pride in your work makes the best quality control.
Absolutely 💯
This information goes right along with the information about the lifter bores. If it isn't right for every cylender it's not going to run its best. Probably will give the tuner issues.
Thanks for the information.
I believe this along with many other things is why it's best to have one shop or man machining and building the engine.
Great point!
Morning Daniel. Once again you show us what it's all about. Buyer beware. I echo prior comments. thanks for the info. keep it up. I keep uncovering stuff that isn't right myself. No wonder, I get engine shake during running. It's all about tracing the root of the problem. Thanks for the ideas, as to refining the issues out there.
Thanks for watching!, amd we really appreciate you!!
Really curious if the cam manufacturers are trying to grind the cam assuming that there is some loaded twist in the cam when it’s running , maybe that’s not a thing, I’ve often wondered this about camshaft with heavy spring pressure, thanks for taking the time to make the videos. I really enjoy your channel.👍
Or check for lifter bore out alingment
No, it's just sub par work
Good insight. But a cam core is a beefy chunk of metal and would need a lot of force to deflect.
Not on these, but gun-drilling (adding another torsional 'wall' through the center) and progressive clocking of the lobes was something I was shown as pro stock/comp eliminator tech. Thats an inch of lift and well over a half-ton spring pressure over the nose, though.
If it was for that the advance would increase progressively as you go down the lobes away from the timing gear.
That's like finding out the tooth fairy isn't real. How many people out there have mis-indexed cams? And how do these cams get in the boxes past quality control, especially from well-known companies?
Mostly because there is no quality control!
These vids make me wonder why I didn't pay more attention to a buddy of mine years ago who worked in a cam grinding/manufacturing shop. Seemed like he spent a lot of time grinding and installing his Frankenstein cams in his '55 every other weekend. Anyway, is the feed into the stone automatic or are you feeding it manually?
Manual
How many of the big companies even use an index plate anymore? I thought everyone by now had CNC grinders like I do. With the wide variety of engines out there these days, with varying lifter angles etc. Do you have to have an index plate for every possible combination? I can think of 5 different BBC lifter angle packages in my head right now, stock, 42-48, 45-50, 42-27, 47-52, etc. I have never seen a machine like yours, its interesting. I can tell you have pride in your work. Keep it up.
cw
Every cam company that I know of still has manual grinders in production, yes we have plates for every different bank angle and firing order
Interesting video. Is this something you see with OEM cams too or is it more of an aftermarket issue?
Mostly aftermarket
Thanks for showing us ...great info.
You bet
MaGiK! Totally amazing ART!
Ty
Do you have a video showing the Set Up of this camshaft grind machine? I'm really curious how you match the lobe profile on the machine for the grinder to follow cam lobe exactly like it does.
Yes, this. I came to the comments to see if anyone explained how he is able to match the lobe profile from another manufacturer. this video is awesome
@@robtdougherty yea I'm just curious how that machine works as far as how is that machine perfectly following the lobe profile.
@@robtdougherty it's like the grinding wheel setup is riding on an identical lobe profile and degreed in to match the cam lobe 100%. I'm just curious how that is achieved and set up.
@@robtdougherty I agree this video and all his videos are absolutely awesome! He is a A class machinist for sure and a down to earth great person!
@@robtdougherty ua-cam.com/video/iM5Tl_oytMM/v-deo.htmlsi=oRJW8zQcO9AJkZ0K
As a now retired lifelong Tool & Die Maker that has had a lot of time on cylindrical grinders, I have to ask, how many cams have you wiped out because of interruptions or loss of focus and the index plate did not match the lobe position? Saw a guy grinding a dovetail on a big cast part and he forgot to take the dowel pin out that he was checking over for size. Cylindrical grinders do make for some bad crashes.
Impressive work again!
Thank you! Cheers!
That's some interesting machine work and I've always thought this variance was what caused the 'freak' motors that we'd hear about now and then that outperformed others that were supposedly 'identical'.
Honda brought a semi-truck load of CBX motorcycles to the local dragstrip back in the day and my buddy test rode each one until the tires were gone while Honda documented all the runs. Then they plotted all the performances and while this did make the classic 'Bell Curve' there was one bike that was faster than all the others and of course one that was bringing up the rear as the slowest one.
This was what Honda wanted to see and then disassembled them and very carefully measured everything trying to find out WHY one was faster than all the rest? Was it some minor camshaft timing tweaks that accidentally happened to that one motor? It's such a complex thing within a running motor that each cylinder might very well like a little different timing than the others due to port, intake or exhaust variables.
I've only been a subscriber for a few weeks now but have already seen things from Mr Powell that I'm very happy to thank him for showing....much appreciated!!
Generally it's the other way around
That was very interesting video.
Glad you think so!
Is surface hardening an issue after you “touch-up” a cam? I’m a Harley tech and the most common issue with valve trains is the hardened surface flaking off the lifter roller, then eating up the lobe.
No issues, if it were it would be a issue before we ever touched it, as we only remove around .010-.015", what u are seeing is just low quality material and incorrect heat treat
Did you happen to catch Dex channel on the oval bottom cam lobe? You should check it out. Was pretty cool example of what type of issues that could cause
Haven't heard of it, you have a link?
perfect example of why you should get cams custom cut and blueprinted.... when you use quality parts with great machining you will be surprised how inline everything comes...
you will notice this when you degree cams in, a very good old school high end engine builder told me that.there's a reason why nascar engine builders d that too
sometimes a few extra dollars spent really goes a long way later on
Definitely
Wow, thanks for showing that to us.
You bet!
Thanks, I'm still learning.
Glad to help
Would love to see a video on the Cam Doctor.
We will do that at some point
@@powellmachineinc what about balanacing a cam?
Appreciate your content🇺🇸
Tyvm
thank you, great information 👏👏
Glad it was helpful!
Thanks for explaining the machine & how you create a, "Key" to get results..... Seeing the "key" used reminds me of computers
when we were using hollerith cards in tabulating stuff. So if you can create the key to do work in .001 or ,0001 ? I see how if
a shop didn't have good "keys" in use they could hurt their customers badly & not even realize it? WoW, ty kind Sir. I'm only
61 but I'm looking at a 2nd Career now...... ty peace
Tyvm!
If someone is building a motor, what would it take on their part, to be able to detect what you just found on this cam? Are their tools out there readily available to do the kind of validation required?
A degree wheel
Hope you are teaching at least one kid everything you know, in this age of cnc, cad etc finding a real machinist who actually understands his trade is getting damned near impossible. In Yoda's immortal words 'Pass on that which you have learned'.
Absolutely 💯, nobody wants to learn, my oldest is in training now, but we need 3-4......
Can't, even trust the manufacturer. They, charge big money, for inaccurate machining. Takes, a knowledgeable machine shop, to figure out their mistakes.
Ty!!
Shits are $500+ now 😢
fascinating video, thanks! that was very interesting, puts some more doubt in my head about cams in general haha but it's todays world. Have a great week.
Glad it was helpful!
Can you do a video of a port and polish job? Maybe some LS heads? How much does something like that cost?
At some point , yes
Thank you for your knowledge and video's USA 🇺🇸
🔔😎
Cams that run with extreme spring pressures twist while running. Are some ground to compensate for this timing variation?
No, because forces are equally spaced it would be impossible,
You are the man sir.
Tyvm
Is it the manufacturer can’t hire skilled labor or people who want to do their jobs? Are they on their phones? Are there no trades being taught anymore, especially in High School?
@joelpierce3940 no,no,yes and no
After seeing how that first lobe started grinding initially, I though that maybe that was a wear pattern in the lobe. Like the leading/trailing edge that takes the most brunt of holding the pressure of the spring. Then you got to the others and it wasn't a consistent pattern. So maybe it is just a manufacturing defect? Those few degrees they're off should be an acceptable amount for a daily driver. But like you said. It should be as close to perfect as it can be for a high performance application
But.... if your equipment is accurate why would it be off at all?
@@powellmachineinc I mean. It's pretty much been chocked up to human error that caused it to be slightly off from the factory to begin with
How many thousands does this take off when you grind the cam. Could you go into the importance and how block imbalance (Siamese) not aligning robs power. How do you fix this problem?
Good information
Ty!
Awesome machine, like a heavy swiss watch
Indeed it is!
Thanks for the video 👍
You bet
Makes me want to grind cams!
Do it!!
That's good to know thanks
You bet
Awesome to see. Consistency from manufactures lacking?
Alot of these cam companies using manual grinders just don't have experienced machinist running them and or have wore out tooling for them.
Very interesting stuff. At what point do you start losing lift?
You don't, it doesn't work that way
I think my eyeballs go dry watching this. Totally fixated
Lol
Old timer taught me always degree the paired cyls. 1&6 on a Chevy. Had a big name cam off 4 degrees once! They acted like that was not even possible.
I've had issues as simple as one cam journal was ground out of spec. Wasn't a cheap cam either.
Yep
While grinding what is the depth step per revolution? and is that an adjustable setting on your machine?
It's a manual infeed
Can you regrind 4 cylinder DOHC cams? Mitsubishi 4g63's? Just like your work and a shop like yours is hard to find. Thx!
Unfortunately we don't do any ohc unless it's direct action
I know a guy who worked at the legendary " cam farm"
No doubt
this is impressive
Tyvm
My question is, how do you match the grinding plate to the customers spec. Camshaft? Duration and lift?
I think I answered my own question, You have to make a master plate for every cam that you grind?
No, we have a lot, so we can generally get very close
How much backup in that "smidge" .001-.002?
.005-.006
Perfection!
Glad you think so!
Your the best
We appreciate that
so the valve would open at a different speed/rate than close ??
Just late or early, same lobe profile
Asymmetric lobes?@@powellmachineinc
I always wondered how they do that.
Glad it helped
i THOUGHT IT HAPPENED AUTOATICALLy? Now I see why they have cam cards and you are supposed to double check
Do you make your own cam masters?
Yes, we also make master for other cam companies also
@@powellmachineinc that's great.
I assume you have your machinery qualified?
We qualify systems in multiple ways, but yes,
@@powellmachineinc Good. It was just something that came to mind. We used to be required to have our machines laser measured once a year and needed to maintain records for each machine. We did a lot of government and "defense" industry work, though. Hell, we even had random pee tests. LOL. Actually, after going outside to get another beer, I believe the correct term is "Qualified". Something about NMBA? ISO 27 something, something.
Index? As in degrees? I thought cam degrees is everyone's own "sauce".
No, all intake are "indexed " depending on bank angle and firing order of the engine, exh are the same way
Has my FE roller cam been cut? Ordered over the phone November 28th
I think we are waiting on lifters, if it's the order I'm thinking of you haven't been charged, lifters are supposed to be in the month.
Those arms are starting to swell up
Lol
great vid.
Ty!
Is it possible that the cam was ground assemitrical.
Well the cam master for the grinder is ×5 bigger than the cam lobeit self, he must have a the same master for this cam or close
No, you would have 3 asymmetrical lobes and 5 symmetrical would you?, also most hyd roller lobes are asymmetrical, but that happens off the bc generally, not below the nose rad.
A little bit here and a little bit there and before you know
It’s off.
Absolutely
🔔😎🇺🇸
Just my observation.
Variations in common everyday performance cams seems irrelvant because few people will degree them anyway... And if they do, they wont degree them on a dyno to get them exact for the best power.
So it seems pretty moot.
JMO. THANKS 👍👍
Oh, and what about chain wear and stretch?? Ive seen Cloyes sets retard 2* in 5,000 miles.
Chain slack is a "thing ", but the lobes are still in time with ea other, quality timing sets don't get slack
@@powellmachineinc
Thanks👍
True, the lobes are ground in. But if they're not ILC degreed by Dyno testing to what each individual combination wants, does it really matter much?
Higher dollar timing sets should last longer. Some don't. Everyday hot rodders will never tell the difference of cam lobes or chain slack.
JME.
Made in the "U.S.A" is a sells pitch. And the upcharge is added because they continue to sell, I'm guilty of it. I'd be happy going without name brand forever and waiting on the shops that does the work.
This family is doing real ish, and should be protected from the shit bag scamming POS that only want to get top quality custom parts for free.
Might as well place your order and have a EQUALLY PROFESSIONAL ENGINE BUILDER! assemble and run in the engine.
Been holding that in for a while.
Definitely
Most cams are not what the mfg day they are , usually to the smaller side.
I see the exact opposite
Must have been made on a Monday. Somones .001 is anothers .0011. Or .2 of a degree is someone's.5. Tolerances are these for a reason and no 2 machines are the same but thats why we have standards.
Case in point. Clearly who ever ground that cam has something slightly off and they probably dont even know it. They check all ther cams an they probably all pass inspection because they are taking comparison measurements. From one to the next and not even knowing they are all wrong.
P.s., after 23 years as a certified mechanic, i trust nothing........ double or tripple check everything! Yes, its more time consuming but its the only way one will know if its right.
Its like a carpenter how has been using the same tape measure for 30 years. Its going to be off. It has to be check on a standard and this clearly is not being done.
On that note, how late, or early would that valve be when talking about piston travel? How much breath would that cyclinder loose? I wonder.
Can't get your money worth anymore
Great Job , real i need a custom cam from yor shop . I see your videos , and dont trust in any " big brand" most today that the C__p cams own a lot of old brands .
Be glad to!
How do you put taper on the cam lobes but not on the cam journals? Different stones?
There is no tapper on roller cams