L98 comression ratio
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From: PA
L98 comression ratio
So did the compression ratio for the 350 TPI change over the years? I see many keep stating 9.3:1, however, my 88 GM service manual states 9.5:1 for the L98 and 9.3:1 for the TBI and 305 TPI.
Can anyone shed some light on this?
Can anyone shed some light on this?
Joined: Oct 2001
Posts: 12,223
Likes: 1,148
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: L98 comression ratio
I know the earlier engines have a dished 4 valve relief piston and the later SD used a flat top with 4 valve relief piston.
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