great thanks!..I figured it was about normal as all
cylinders are within 5PSI of each other and the motor runs smooth as silk but I
just figured I would check with those "in the know".....What needs to be done to
raise the compresion to the level of the high perf. 440's?..is it just the heads
that are different or are the pistons also different from my 1975 as
compared to the late 60's 440's?....Also how much more power should that give
me?...
----- Original Message -----
Sent: Tuesday, November 28, 2006 12:14
AM
Subject: Re: IML: 440 compression??
compession ratio was rated a 8.2 to 1, but its more like 7.7 or
so. 125 PSI sounds normal. .
>From: "Andrew A." <canafornia@xxxxxxxxxxxx> >>Just
wondering if anyone knows off hand what the normal good cylinder
>>compression PSI is for a 1975 440?...Usually I'm used to V8's
being in the >>145-160 range, but all my cylinders in my 1975 440
are between 122-128..I >>understand that these are low compression
engines but have no idea what is >>considered "low compression"...Is
that normal for these
engines? >
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