I was thinking of swapping out my current pistons in favor of some lower compression slugs so I would have more options on head choice and possibly a blower. The motor is a 383 LT1 w/ forged Weisco pistons BTW.

My question is - can I swap out my .030 over Weisco flat tops in favor of some .030 Weisco dished pistons or will I have a compatability issue (ie do I have to go more than .030 over at this point)? I was told a while back that not every .030 over piston is ***exactly*** .030 over. I would hate to get pistons that were too small or big. Thanks!
-G

 

you should not have a prob. If you Wisecos and use their piston again let tham know what your doing.

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95' T/a m6
383-ported Lt-1's
Scat crank, eagle rods, custom Fed-Mogul pistons
headers, car back, etc
Ed Wright tuning
to much other stuff
9-inch rear on the way

Owner of
Tischler Competiton Engines-Somerville N.J.

 

Anytime you install pistons you should check the piston skirt to cylinder wall clearance against the piston manufacturers specs. In fact, in high end engine building each piston is individually fitted to a specific cylinder to get the clearance spot on. Too loose = lost power from poor sealing, too tight = lost power due to excessive friction, possible damage due to scoring or even seizing.

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"