Hi,
Vance's comments are right on, but I'll throw some numbers into the mix...
My bone stock '74 used to get between 135 and 140 per pot (engine warm) in
a static compression check. In contrast, the race car (11.0:1+, cam and
other stuff) produces over 235 psi per hole.
The race car has a few more ponies than the street car (did). I warmed up
the street car a bit.
:-)
But the only real way to know the compression ratio is to measure the cc
volume of the combustion chamber and divide that into the cylinder volume.
A stock bore motor yields 416.33 cc's per hole, so a 41 cc chamber will
get you a bit less than 10:1 (assuming the volume of the head gasket to be
about 3 cc's.)
rml
------------------------------------------------------------------------------
Bob Lang Room N42-140Q | This space for rent
Consultant MIT unix-vms-help |
Voice:617-253-7438 FAX: 617-258-9535 |
------------------------------------------------------------------------------
|