Your high compress does depend somewhat on your altitude. 160 at sea
level is very different from 160 in Denver, so it depends how high you
are. The drop in #2 seems a little high, but I don't think that would
stop you from running.
Try putting a teaspoon of oil in each cylinder and retesting. If #2
swings way up (or all of them) then it indicates rings... If not, then
if I am not mistaken, then it means valves...
On Mon, 25 Feb 2002 14:54:34 -0500, James Laukaitis wrote:
>
> Don't beat on me too hard on this one but I have a question. I have
>the carbs off the BGT, so it won't run, but I wanted to do a compression
>test, so I did. I wanted to see if there are huge discrepancies between the
>pistons. I figure I can get a general idea. I get (in psi) 130, 115, 135,
>130 from front to back, that is radiator to firewall. The test looks pretty
>good considering. I was looking for a bad cylinder, with a large
>discrepancy (ie. 130, 125, 87, 130). I know the working compression (high)
>should be 160psi. I think I can get close to that with the engine running.
>Can I consider this pretty much valid, or am I really off base here and
>cannot count this info at all?
>
>Thanks,
--
Andrew Lundgren
lundgren@byu.net
http://lundgren.denver.co.us
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