My rebuild runs around 105psi and the non-rebuild
tops out around 95-98.

Again, This ABSOLUTELY does vary depending on
lots of factors than Im aware of such as,
hot/cold, throttle open or not, day of the week,
time of day, etc.

really.

I think this is why my book is so vauge on the subject. I
use it to look for trends and to compare cylinders more
than anything else.

70-80 does sound too low and 10psi is too large of a range
I think. Your lower cylinders will read a bit lower.

db


"Jim and Becky" wrote in message
...
OK I agree, but if all six cylinders have 70-80 psi isn't there a problem?
I'm thinking the 120-140 psi range is what I'm looking for based of
something I read long ago.
Hence my latest question.


"Mark" Boatbasin@optonline(remove this).net wrote in message
...

"Jim and Becky" wrote in message
...
Anyone know what psi reading I should expect on these 1988 200's?
On a new engine?
An engine that I probably don't want?

You should not be concentrating on absolute compression reading, The
compression reading will depend on humidity, air pressure, cranking
speed
(battery charge) and a host of other factors. You should be
concentrating
on the difference between the cylinders, a range within 5 psi is what
you
ared looking for.