PTV with custom grind Comp Cam?

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Dec 2, 2007 | 03:30 AM

Jakson

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From: MN

PTV with custom grind Comp Cam?

I bought a cam from a member on board and was wondering if my PTV clearance will be fine. Its a 235/240 .646"/.609" on 112 lsa. Will I be ok, or should I still try to measure it? I was thinking of just doing the clay method if I do.

Also was wondering about lifters. Will the stockers be fine(125k)? Or should I get new ones, and which would be the best?

Thanks for any help,

Jakson

Dec 2, 2007 | 04:03 AM

BOWTIE

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From: AUSTIN TX

Stock heads, stock gaskets, SHOULD be OK, but it is a good idea to measure. Do you know how much advance it has ground in?

Dec 2, 2007 | 07:09 AM

PREDATOR-Z

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From: BFE

definately new lifters. If I were you I would do a compression /leakdown test as well.

Dec 2, 2007 | 11:12 AM

Jakson

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From: MN

Quote:

Originally Posted by BOWTIE

Stock heads, stock gaskets, SHOULD be OK, but it is a good idea to measure. Do you know how much advance it has ground in?

Not sure on the advance. I will look when the cam arrives, or give comp a call and see what they say. I will be using Patriot stage 2 67cc heads, and stock gaskets. Which lifters would be the best, Ive read some stuff about the GM "Caddy" lifters, would they be good?

Dec 2, 2007 | 12:08 PM

PREDATOR-Z

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From: BFE

If you have aftermarket heads they most likely have bigger valves or/and milled so PTV will be an issue.
Bottom line you HAVE to measure.

Dec 2, 2007 | 06:35 PM

ls1pwrdss

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with those heads your going to have to fly cut your pistons for that cam. about the only head you could probaly use is a set of 243 ported and polished
with stock size valves even with that you will br close on the ptv clearance