RE: compression

[Brian Schlump <jsbs@xxxxxxxxxxxxx>]

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**** Bounces like rubber! Shatters like ceramic! ****
Discover Crazy Aaron's Thinking Putty in grown up 
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caab5n2b7yoMza/ Crazy Aaron Enterprises
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I had a '68 GTX that was stock.  It had about 155 psi when I did a 
compression check.   I put in the MP 509 cam, and the compression fell 
to around 130 psi while cranking, but it sure breathed better at higher 
rpm...Brian

Greg Parsons wrote:
> 
> Lets see if I can help here. My Poly before I tore it down had 145 psi, 
> and
> it is about 8.2 to 1, the drag car my buddy owns is a 13.5 to 1 motor, 
> but
> the compression gauge only shows about 160 psi when cranking it over. 
> Now I
> now that doesn't make sense, but you have to think about cam timing, 
> over
> lap etc. That is why it is so hard to figure true C.R. from a gauge.
> Greg
> 
> 
> -----Original Message-----
> From: Albinted@xxxxxxx [mailto:Albinted@xxxxxxx]
> Sent: Sunday, March 28, 2004 9:49 AM
> To: 1962to1965mopars@xxxxxxxxxx
> Subject: Re: compression
> 
> 
> 
> so whats that mean? what kind of info do i need that a compression 
> testing
> gauge gives me besides pounds per square inch? i got a old fashioned 
> gauge
> here
> a fella loaned me with a little chart on it that says 160 lbs equal 9 to 
> 1.
> i
> bought a new gauge from sears yesterday and checked all my cylinders 6 
> read
> 150 but two read 148 or so. are you saying psi is not translatable to 
> cr?
> why is
> every compression tester ive ever seen mark in psi then? methinks 
> perhaps
> its
> yet another cheap shot from one of the cyber gurus. thanks for your help
> sir.
> 
> 
> 



'64 Belvedere
Woodstock, IL.

===========================================================
**** Bounces like rubber! Shatters like ceramic! ****
Discover Crazy Aaron's Thinking Putty in grown up 
handfuls. It's the creativity unleashing, mood enhancing 
desk toy!
caab4CEb7yoMzf/ Crazy Aaron Enterprises
===========================================================

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