Re: Farmall M won't run at 180 psi compression

Posted by James Rumph on September 11, 2009 at 18:24:12 from (24.192.125.175):

In Reply to: Farmall M won't run at 180 psi compression posted by LarryM on September 11, 2009 at 14:08:45:

I have 220 psi per cylinder and that is only 10.750 to 1 compression.

In your intake manifold tap a small hole for a vacume gauge. Under full load "on dyno" it should read almost zero. If it is produceing vacume then your running lean and it needs more fuel.

Do you have a fuel pump on it or is it still gravity feed ?

You are on the verge of race fuel and it wouldn't hurt , don't use A/F gas it has antifreeze in it.

Set your timing on the dyno under full load , go for highest rpm under load. We use a digital timing light with a tach in it.

Email me direct if you have any more questions, i run a dyno service.

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