100 psi on new heads
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Supreme Member
Joined: Mar 2005
Posts: 1,665
Likes: 3
From: Benzie, MI
Car: 91 rs
Engine: Blow through 383, 10 psi, xr288hr
Transmission: Manual th350 ATI 3000
Axle/Gears: 3.50 9"
100 psi on new heads
I put some 76cc heads on my 305 and its only got 100 psi. Roughly 7.5:1 compression. Im putting a centrifugal supercharger on it and im wondering if the compression will be ok or if the super crap stock heads would be better? The new heads are rhs torkers. 170cc stock replacement but much better flowing than the swirl ports.
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Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
You can run ALOT of boost with 7.5:1 compression... most guys who build a motor specifically to use a blower, use a CR around that, so you should be fine. Just get a cam to match and you should be good to go if the bottom end can handle it.
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mdtoren
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Aug 16, 2015 05:45 PM