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Discussion Starter #1
Gents,

Any ideas to why I would be only getting 80 PSI on cylinder #2. The block was full rebuilt. New bearings, decked, bored, honed, new oversized pistons, hasting rings. The cylinder head was resurfaced, 3 angle valve job, a few valves got replaced and guides.

Here is my compression numbers.
#1 = 160
#2 = 80 psi
#3 = 160
#4 = 160
 

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BATSLOMAN GIVES NO FUCKS.
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4,045 Posts
did you do a leakdown to see where its coming from?
 

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2,794 Posts
If I were a betting man, I'd suspect a valve related problem.

As said above, leakdown is your first step.

I ASSume this engine has been run through at least one heat cycle at this point?
 

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Discussion Starter #6
the car hasn't even left the jack stands. it has ran for at least 25 minuets at idle to make sure everything is running right. Then misfire on #2. I suspect something to do with the valves. Possible valve lash is all out of wack which is possible, or a flat spot on the cam lobe.

leak down test soon to come when i get time.
 

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Brokedick Millionaire
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40,267 Posts
If a new valve sank a few thousandth's it could toss off the PSI numbers. Not clocking the rings won't effect cranking PSI as long as they don't break.

Flat spot on the cam lobe would have the better cranking psi numbers, check the lash again.
 
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