i just got a rebuilt 355.. i have a set of heads that have just come back from the shop that i was going to use on my 305.. the heads are 416's and i had 1.94 and 1.60 valves put in, as well as a mild port job. the heads are 58cc's
can i use these on my new 355? i really dont want to buy new ones.
also is a 93LT1 cam better than the stocker? i have one , and the engine is still on the stand, so i didnt know if i should change it out or not.. thanks guys
It depends on what pistons the 355 has. If they are flat tops w/valve reliefs it would be almost 11.0-1. If they are dished like stock it will be a little over 10.0-1 and that would be pushing it to the limit. 91 octane would not be enough with steel heads.
Yeah, the cam is better than an L03 or L98.
Question Originally posted by 305LG4Cutlass What about 416's on a 79 LM1 350 that had 8.2:1 cr stock? What would the cr be?
LM1s use 76cc heads ...
Quote:
Answer Originally posted by Dyno Don ... they are dished like stock it will be a little over 10.0-1 and that would be pushing it to the limit. 91 octane would not be enough with steel heads.
I would recommend that you use 4.00" bore heads with any 4.00" bore based engine. Too many hidden problems from just slapping on 305 heads on a 350 engine.
__________________ George P. Lara
2001 Camaro SS #0391 | 2002 CCSB 4x4 HPTuners for '98-'02 F-Bodies & '99-'02 Trucks
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1998 Camaro Z28: 9.94 @ 137, 1.45 Stock Short Block
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