John Wallace wrote: ↑Thu Jul 12, 2018 7:53 am
Was it just required to start and run, not make a certain HP on dyno?
(lot of difference)
Run continuously for 1 minute, then tear down inspection for loose fasteners and critical fasteners torque checked.
I have done a winning cup engine in 9 hrs, but it wasn't fun! Lol
You need to find a new camshaft grinder then. Porsche pancake racers have this problem too as the cams spin in different directions. A few grinders understand this and grind accordingly.
You do know what Jay does for a living and who he works for, right?
Does either method really matter considering best performance is usually found by dialing it in on the dyno and is usually not what the cam card calls for?
It's no different from checking bearing clearances.
You don't really need to because most of the time they're OK.
BUT
It finds unexpected errors and at the same time teaches you a lot.
That's before you run it.
Some cams are made better than others..............how would you know if it's too hard to measure?
I agree it needs to be checked I just don't how you decide the best ICL unless your on the dyno.
Please Note!
THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBERS AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!
Can you post a picture of what you used to measure cam location to within .1 degree three time in a row? Thanks.
What, of a degree wheel and an indicator?!? Lol
Just kidding.
It is a 10in ring that holds a rear encoder on the dyno flywheel, and is graduated in .5 degree increments, along with a 3.5in Starret indicator in the pushrod.
Setting ICL
Can you post a picture of what you used to measure cam location to within .1 degree three time in a row? Thanks.
What, of a degree wheel and an indicator?!? Lol
Just kidding.
It is a 10in ring that holds a rear encoder on the dyno flywheel, and is graduated in .5 degree increments, along with a 3.5in Starret indicator in the pushrod.
Setting ICL
Thanks Warp Speed. I figured it must be an awesome set up.
When using a piston stop, what can be done to account for the backlash when reversing direction of the crankshaft? If you don't allow for it, doesn't there have to be some significant error if you are using a timing chain?
BobbyB wrote: ↑Fri Jul 13, 2018 10:17 am
Thanks Warp Speed. I figured it must be an awesome set up.
When using a piston stop, what can be done to account for the backlash when reversing direction of the crankshaft? If you don't allow for it, doesn't there have to be some significant error if you are using a timing chain?
When using the piston stop, you are setting tdc, not measuring event placement, so reversing doesn't matter. Once tdc is set and the stop is removed, you will ALWAYS go in the direction of rotation.