BC

I contacted Rob and Rob says its Greg's shop and he can do anything he wants. I'm thinking "Theme Party".

kidding.

Rob Edwards

I'll bring the engine!

soontobered84

Is this the "Intro to Cam Timing" class or is this one of the advanced classes? Wish you guys were right down the street or "just a coupla hours" drive from me. I learn much better from doing than reading. I guess I'll just try to get Sterling to come over when I get to that point.

mark kibort

Just mount them up and do it the old fashion way. Start at about 45 degrees before TDC and zero the micrometer. At 20 degrees after TDC, the #1 or #6 lifter should be depressed about 2mm. With a more agressive profile, you might even want to look at 1-1.5mm, because with your 7000rpm motor, you want to have the cams slightly retarded anyway. remember, we did the dyno test with advanced like GT vs retarded like 85s and hp gain was only around 5, and the torque loss was about 20 (peak), at a rpm that I dont use in racing. So.....
There you go, DONE!

mk

blown 87

I think he wants it set up to the specs on the cam card, not to the specs of the opening of the stock cams.

mark kibort

fine,then just set it up for 4mm movement at TDC for the intake.

Those cams are nothing like the S3 cams. they start to open at near 45degree BTDC and are at 4mm at TDC. Then, the lift is well over the S3 cams as well.

Anyway, if he just sets it to 4mm at TDC starting from 50 degrees BTDC, he will orient the cams where the cart wants them to be. Right?

mk

blown 87

I have no idea.

mark kibort

Also I noticed valve lift vs cam lift are different (i.e. .5" vs .35"). is that because of a base circle grind down? curious.

GregBBRD

I sometimes get myself confused (not too hard) and end up looking at a degree wheel to figure it all out. I'm afraid that my brain would spontaneously combust if I tried to figure out a vario cam. My hat is off to you!

GregBBRD

BC

I sure as hell hope they are nothing like S3 cams. I said they were the original S3 cams changed to these specs by grinding. I paid over 1000 dollars a few years ago to get these ground like this. They BETTER be different.

danglerb

When you have cams ground don't you specify how you plan to install them, straight up or whatever?

Who is bringing the donuts?

I could bring my HF dial guage.

GregBBRD

Yeah, like we are smart enough to know what that means!

BC

I was new to the process. If specifying their installation was possible, I would have done it. It was a "grind" that was available through my chosen vendor - and he sent them somewhere else.

Since then, I have attempted to get the true information on them so I could accomplish this important task, and I just never got a straight answer, other than "when you want to put them in, call us"

That's not how you learn. But I am learning now.

BC

No. The software probably wanted an input on that, but I just asked him for the lobe info. True lift would be engine specific, I think.