How much HP is 1 point of compression worth..
Thread Starter
TECH Fanatic
Joined: Sep 2003
Posts: 1,937
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From: "Tr"Asheville
How much HP is 1 point of compression worth.. Reason I ask is that on my stock shortblock I was running roughly 11.3-11.5:1 compression. With all of the same components (well a different spec cam for the turbo), on a forged 6.0L I am running 8.8:1 compression. I'm just curious how much the compression drop would affect my NA RWHP. Losing around 2.5 points of compression the new engine feels a lot stronger then what I was expecting.
-Sly
-Sly
TECH Fanatic
Joined: May 2003
Posts: 1,292
Likes: 6
From: RainbowCity,Alabama
I have always used the 4% rule.A while back one of the magazines performed a engine dyno test,with the same motor,and changed the compression in 1 point increments.The test turned out to back up the 4% rule of thumb.
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