even 160 PSI compression too high? How do I lower it?
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even 160 PSI compression too high? How do I lower it?
What could be causing this high compression, how do I lower it? Is it good that it's this high, I read that most stock Chevy's are in the 120 range...
When I tested the first time on a hot hot hot engine my # 4 tested 125 and my #6 tested 160... after running some water though my intake and warming the engine a few days later they are all at an even 160...
Can someone decipher the riddle?
When I tested the first time on a hot hot hot engine my # 4 tested 125 and my #6 tested 160... after running some water though my intake and warming the engine a few days later they are all at an even 160...
Can someone decipher the riddle?
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If you look at my times they are a full .5 seconds slower than a stock 2.8 should run, I trying to find that time in my setup... the computer checks out everything is OK according to a Snap-On scanner...
#3
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did you do the test right, most people don't. run it with the plugs out and the throttle open. all the readings should be within 10% of each other. the actual number doesn't mean that much. 160 isn't high and 120 isn't low, all would be considered in the normal ranges, but the deviation is too much.
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160 is not high. My '91 350 showed 150-160 psi when I checked it. There is a great article in this month's Chevy High Performance Magazine (Crank It!, September 2002), that covers this exact subject. The article states that a good range for a performance street engine is from 175-190 psi. There is also a side-bar that tells how to check compression.
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