is it safe to assume that vette's have a higher c/r because of the smaller cc aluminum heads. being the bottom end other than the fact all vetts are 4 bolt mains are the same as a f-bodies?

 

I'd say yes, except the part about the 4 bolt mains. I think most agree that they are all 2 bolt mains except for maybe a few factory freaks.

 

The Corvette has approximately the same compression ratio as the f-body because they run a head gasket that has a compressed thickness of .050. The f-body has a compressed thickness of .025. I believe all vette's with the L-98 have two bolt mains.

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1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29

 

when i traded an l99(impala motor) engine for a mint 88 vette engine i noticed it had 4 bolt mains whether it was a factory replacement block or a special i dont know but if there was one there must be many more like it.normal sbc head gaskets are .041 compressed gm does make a factory replacement gasket that has a compressed thickness of .027 as far as i know they were the only head gasket sizes from gm at that time

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87 trans am,gm crate 350(4 bolt mains 10to1),L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,gutted airbox,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,160 fan switch&t-stat,tb bypass,accel supercoil,cap& rotor,slp 3in. catbcak,a/c delete.

SHE IS GONE BUT I KNOW THE GUY WILL GIVE HER A GOOD HOME.

best e/t:
3653lbs./full tank+ driver.
14.10@96.53mph 2.01 60'

 

all L98's be it a B2L or a vette L98 is a 2 bolt main motor. ive had the oilpan off of my stock 88 vette motor and it is a 2 bolt main. the ONLY vette L98 engine to be a 4 bolt main is the callaway twin turbo RPO B2K.