Re: getting more power from a M

Posted by john d on October 06, 2005 at 08:34:19 from (69.212.185.170):

In Reply to: getting more power from a M posted by jms1066 on October 05, 2005 at 21:30:45:

Previous comments are on target. If the M needs an engine re-build, then a Firecrater sleeve/piston set, along with the recommended distributor kit will wake it up some. The stock governor can be replaced with an after-market unit that's more sensitive and gives quicker response. If doing a re-build and the head needs more than a valve job, consider replacing it with the head off a 400 or 450. An LP head is even better, but hard to find in some parts of the country. A cam from the SM-400-450 line will help a bit. When all that's done, you might need to re-tune the carb a bit.
I've got a '49 M that was last overhauled several years ago, but is still in good shape. With M&W sleeves/pistons, and a Thompson governor, it dyno tested at 52 hp after the re-build. It farmed for 20 years or so with the governor set at 2100 rpm, and that never seemed to hurt it.

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