is 40 over too much for a 1990 4 bolt block?
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Joined: Apr 2002
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From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
is 40 over too much for a 1990 4 bolt block?
subject says it all, i was told that you cant go more then 30 over on a post 76 block due to the metal content of the blocks, i have a 4 bolt block that is already 40 over and its a bare block would this need to be sleaved or can i just use regular 40 over pistons? what sort of problems would i run into, would it be likely that i would have overheating problems or warpage? any info would be appreciated
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Joined: Jan 2002
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
If your worried have the block sonic checked, to measure the wall thickness. Your machinist will tell you if its good or not.
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