243 head shaving PTV Questions...

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Jan 13, 2012 | 01:55 PM

eric1h

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243 head shaving PTV Questions...

I have a texas Speed Short block with the 3.905" Diamond -2cc pistons, H-Beam SCAT rods, stock crank and stock 243 heads.

Pat G Spec'd Cam:
226/230 .598”/.600” 111LSA +4 advance (with 1.7 ratio rockers - 7.400" PR's)

I am in the process of rebuilding the motor and going to have the heads decked/shaved. and looking to try and pick up a few HP. How much can I safely shave off the heads and not have any PTV clearance issues?

This motor is a road race car motor and will see a lot of 5000-6500rpm revs' if that matters...
Thoughts?

Jan 13, 2012 | 02:11 PM

mark21742

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From: PA/MD

Really the only way to know would be to clay the heads, then go from there

Jan 13, 2012 | 04:03 PM

3rdCoastPowerSports

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From: Loony Bin

or a dial indicator and degree wheel

Jan 13, 2012 | 04:17 PM

mark21742

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I like to dumb it down and use the clay better....less chance of a miss measure

Last edited by mark21742; Jan 13, 2012 at 04:47 PM.

Jan 13, 2012 | 04:55 PM

JPH

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Quote:

Originally Posted by eric1h

Those valve reliefs in your new pistons will be very helpful to you now. I would use checking springs to double check your depth(which you should be plenty fine) and also check the radial clearance with some clay to make sure that is ok also.

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