Compression

This is a pretty common question here.. What are your compression readings ?? I'm running a tired 51 year old engine with 45# compression.. It has enough power for me and doesn't leak anything..
 
my compression gauge doesnt have a large enough adapter to do my model a, did you guys fab one or is your gauge that old?
 
I suspect Tom does the same as I do. Warm engine, throttle wide open, and all plugs removed. The gauge typically hit very near peak on the third compression stroke and absolute peak on the fourth.
 
hotrodderhaag said:
my compression gauge doesnt have a large enough adapter to do my model a, did you guys fab one or is your gauge that old?
Click to expand...

I believe most of the parts suppliers sell an adapter. I had a friend machine a spark plug base to make an adapter back in the early 70's as there were no ready made adapters available at that time.
 
hotrodderhaag said:
my compression gauge doesnt have a large enough adapter to do my model a, did you guys fab one or is your gauge that old?
Click to expand...

Use an old "take apart" sparkplug base, remove the core and then use a tap that fits your compression tool. The thread depth may be shallow, if so, a couple extra layers of teflon tape will seal it.

Or just order one from the Model A parts suppliers. Snyder's Shown

A12405ADP-8019-xl.jpg
Part# A-12405-ADP

Good Day!
 
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