Quick PTV clearance question
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From: Ringgold, GA
Quick PTV clearance question curious to get everybodys opinion. we was puttin togethor my ls1 and we used the playdough meathod to check ptv clearance and it measured out to be 43 thousandths and 50 thousandths. would this be a safe to run? its a stock ls1 with portd 241s and custom grind cam.
The recommended clearances are 080/.100 for the intake/exhaust. You seem to be quite a bit below that. If you were around .070/.090, you could prob just run a bit thicker gasket and be fine, but I doubt the clearances you measured (if accurate via the clay method) are safe gaps.
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From: Ringgold, GA
was re checking everything last night and actually swapped stock pushrods in and the clearanc was 63 thousadnths and 65 thousandths. Measured the 7.425 pushrods i had and they measured 7.445. Im thinking the extra lil 20 thousandths longer pushrod is whats throwing it off so bad.
If the pushrod length makes a difference in the measurement, you are not measuring correctly. Exactly how are you doing this? Do you have solid lifters? Based on what you have found, my guess is all your numbers are inaccurate.
