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Registered
Join Date: Apr 2003
Location: Terre Haute, IN
Posts: 2,949
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Where to measure piston diameter?
Do you measure the pistons in just the one dimension under the pin bore for 76' and later pistons? This seems to be the only area showing the slightest rub/burnished finish. I couldn't find the information in any of the books in "detail".
In Wayne's excellent book it shows in "A" to be measured here for 76 on engines. I don't see reference for any other plane or area to measure the CIS Mahle piston, these being from a low mileage 79.
I don't have rings yet for these and if I replace them I'll likely go with JE's. Could someone give me an idea of spec on top ring land so to justify ordering a set of rings or not? I found specs upto a 2.7 and then it simply says NA (these were listed at 1.540-1.590). I don't want to buy rings obviously for a set of pistons that I may not be able to use.
TIA
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Luke S.
72 RS spirit 2.7mfi, 73 3.2 Hotrod on steelies, 76 993 3.3efi TT, 86 trackrat, 91 C4s widebody,02 OLA winning 6GT2, 07 997TT, 72 914 v8,03 900 rwhp 996TT
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