compression numbers, how bad are these Options

[mobymutt]

Just did a compression check, here's what I measured:

108, 120, 96, 85

I've got a stock 1.8L, but would like to build a 1911 or 2056 in the relatively near future. Hopefully I'll be ok for another year or so with the current setup.

[mobymutt]

Full disclosure: I did just have the engine apart, but (for a number of reasons) I didn't replace the pistons, cylinders or rings.

There was actually a pretty big 'pocket' in one of the cylinder walls (looked like a casting void), so having at least one cylinder with low compression doesn't surprise me.

Is there an actual spec for what the compression numbers should be on a good engine?

[porschetub]

Full disclosure: I did just have the engine apart, but (for a number of reasons) I didn't replace the pistons, cylinders or rings.

There was actually a pretty big 'pocket' in one of the cylinder walls (looked like a casting void), so having at least one cylinder with low compression doesn't surprise me.

Is there an actual spec for what the compression numbers should be on a good engine?

Did you remove the pistons from the barrels and refit the old rings ?.
I always do the compression test as much as 3 times,surprizingly you can get a fair amount of difference,on the 3rd test put a little engine oil down the plug holes if you see a noticeable increase if your rings likely bad.
It really pays to check/reset the valve clearances (cold engine) first ,can make a real difference,also make sure your engine is up to normal running temp when testing.
I've never done a leak down test but it sure seems to be the best check to do.
Compression pressure depends on your compression ratio ,you could have dished low compression ,flat top,or raised top high compression pistons,deck height could have been changed if the heads have been flycut,these are all factors to take into account.
I would say 120 - 150psi would be a healthy engine.
Good luck.