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I'm not planning to touch the internals of my
engine for a while as it runs super smooth, is low mileage, and I just have way
too many more pressing projects to warrant having still another motor sitting on
an engine stand in the garage...This winter it willl be bodywork and paint which
includes redoing the vinyl top..I have to take the exhaust manifolds off as it
does have a major exhaust gasket leak on the left side and so am planning to go
to dual exhaust and flowmasters at the same time..I figure I'm paying for the
gas so I wanna hear it burn! ;-)...Are there any headers available for this year
or should I just leave the manifolds as they are?..
What exactly was a LEAN BURN car? how can you tell?
and how do you remove it?...I have a Canadian car, so I don't know if that
was an option up here or not
----- Original Message -----
Sent: Wednesday, November 29, 2006 11:22
AM
Subject: Re: IML: 440 compression??
It sounds like you have a healthy engine, but as far as raising
compression, I think you can get the performance improvements, without messing
with the engine too much.I'm not sure if you have a"LEAN-BURN" motor, but if
you do, that goes first. Next a dual exhaust system, I had a78 NYB, I used 69
440 RoadRunner mufflers with 21/4 inch tail pipes.Then a little carb mods.We
went 1 step further, and changed the rear axle ratio to 3.55 .It wasn't a
rocket-ship,but it sure ran good, and could still get 13-15 mpg.Raising the
compression on your engine won't help much, unless you change the cam, carb,
and do the above. Don't forget what your driving.Ya'll have a nice day,
Dave.
--------------
Original message --------------
From: "Andrew A."
<canafornia@xxxxxxxxxxxx>
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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