compression question
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Junior Member
Joined: Apr 2010
Posts: 20
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From: The fastest city in the world Houston, TX
Car: 1988 firebird formula
Engine: 305/ soon to be carbed
Transmission: 700r4 / soon to have stall
Axle/Gears: dunno but i have 4.10's on the way
compression question
found a pretty good deal on a tbi 5.7 short block. how much compreesion would i be running if i kept my 305 heads. i have heard everything from 10:1 to 11:1. if anyone knows for sure let me know.
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
About 10:1, depending upon deck height and head gasket thickness.
On Probation
Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: compression question
Don't put LO3 heads on any 350. It'll detonate all the time, and be out of breath by 3500 rpm.
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