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Discussion Starter #1
Just wondering if this compression is to high in my 302? Car is boosted. What's the highest boost level can I go?

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Jersey True Street Guy
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3,195 Posts
More compression makes more power. Like the guys said, watch it with pump gas...

My motor gave us a big smiley face when we gave it more compression...

If running race gas you can go higher then 9.25 safely. The things some of the 275 owners do with motors scares me....
 

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i run 9.5:1 with iron heads, 12#'s and pump gas. no problems so far.
 

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old motor was 9.8-1 with #15 lbs of boost on 93 made 567rwhp

new motor is 8.5-1 with #30 lbs of boost on E85. no idea find out friday for hp

if you have a good tuner youll be fine. make sure you have good fuel pump/pumps
 
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