Compression

[John Trindle <jtrindle@ftf03.larc.nasa.gov>]

Finally got around to a compression check on my (oil-burning) 69 Spitfire.
 
Readings:  165/100/150/150.
 
I take it that cylinder 2 is in pretty bad shape <sigh>.  This is the 
same cylinder where I had really bad carbon buildup on the plug last week.
 
Are the 150 readings on 3 and 4 OK or out of tolerance?  Never looked at
auto compression checks before (aircraft ones, yes, but they have much
lower numbers).
 
...John Trindle