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Old 04-30-2012, 03:53 PM
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wrogers55 wrogers55 is offline
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Join Date: Sep 2009
Location: Hideaway, Texas, TX
Cobra Make, Engine: Backdraft #318, 418 CI, 532 RWHP, Mass Flow Injected, TKO600-Road Race, BMW M3 Suspension, Race Springs (Wouldn't do it again, rough on the street).
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Brent's comments on setting methods and big overlap cams is starting to worry me. It's a big cam.

So, here is what I did to set the preload....and I do have time to redo!

1. went to #1, turn crank clockwise
2. exhaust vale opens and closes
3. intake opens and just as it closes completely (intake off easy to see) I stop
3. put the ratchet on the crank bolt at 12 o'clock and continue to turn it clockwise to 5 o'clock.
4. set the lash on both intake and exhaust.
5. continue to the next cylinder and do the same, and so on.

I marked the cam base circle centers with a felt tip before I put it in and this method brought those marks close to the roller.

So, I thought I was OK......maybe not. I'm not looking to invent a new way to do this and this may not be new anyway, but now I'm a bit worried.

Brent, lifters are Comp Cam rollers #851 and this is a retro fit motor with a spider and dog bones to hold the lifters in place.

In case it's important: Duration at .006 tappet lift Intake=299 Exhaust=305
Duration at .050 on the cam card = intake 248, exhaust 254
I installed it at 106 Intake centerline.

Guess there is more than one way to skin a cat, just hope mine is skinned!

Thanks for the help.
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Wayne Rogers in Hideaway, Texas
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