[DeTomaso] Compression ratio estimate

[Pantdino]

I thought you could estimate CR based on the compression number you get during a standard compression test. No?


-----Original Message-----
From: Ken Green <kenn_green at yahoo.com>
To: Boyd Casey <boyd411 at gmail.com>; detomaso <detomaso at poca.com>
Sent: Sun, Aug 11, 2013 8:17 pm
Subject: Re: [DeTomaso] Compression ratio estimate


Maybe you can get a bore scope and see if the pistons are flat top and the heads 
are closed chamber (I'd guess the most common configuration?), that would give 
you an idea.  But the compression is not just a function of the TDC and BDC 
volume (which changes if the block is bored), and also the cam.  A big cam with 
a lot of duration would reduce the effective CR.
 
Ken

From: Boyd Casey <boyd411 at gmail.com>
To: "detomaso at poca.com" <detomaso at poca.com> 
Sent: Sunday, August 11, 2013 8:02 PM
Subject: [DeTomaso] Compression ratio estimate


Dear fellow Panteraians,
I have a question for the more technically savvy . Is it possible to come
up with an estimate of your pistons compression ratio by measuring the
cylinder compression? As I have mentioned before I bought my car from the
estate of a gear head who owned several auto parts stores and he spent
allot of money on my Pantera when it was his. He was apparently a fan of
Hall Pantera because allot of the Pantera goodies he bought appear to be
Halls ( and there were lots of Hall literature and parts lists)
The engine has roller rockers and Hall big bore headers and an in unidentified
cam. Since I have not been inside the engine ( and don't want to until I
need too) I am trying to find out as much as I can and if there are any
forensic techniques for coming up with an educated guess as to the engine
components I would appreciate hearing about them.
Boyd
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