Posted by LarryM on September 11, 2009 at 14:08:45 from (64.198.86.189):
I have an M with 180 psi compression. Today I put Autolite 386 plugs in it, Petronics Electronic ignition, New Wires, 45,000 volt coil, and I have 93 octane in it. What it is doing is that if I start it cold and dyno it the horsepower goes right up above 60 and then tapers off in about 30 seconds and the hotter the engine gets the worse it runs. 180 psi of comnpression is a new thing for me. We used to run a WC Allis with 170 psi on 93 octane just fine. When I dyno the M she starts out strong and then just starts missing and carrying on. I have tried a different carb. I have tried a different manifold. Manifold is sealed properly. The distributor is nice and tight. The valves are set at .020. I just ground the valves and lapped them properly. Valve guides are nice and tight. The darn thing will start without choking it when it is cold. Runs great until I work it on the dyno. I really need help on this.
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Today's Featured Article - Talk of the Town: How to Remove a Broken Bolt - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I have an aluminum steering gear housing with a bolt broken off in it. The bolt is about a 3/8" x 1 1/2" bolt. I've already drilled the center of the bolt out with about 7/64" drill bit the entire length of the bolt. Only one end of the bolt is visible. I tried to use an easy out but it wasn't budging and I didn't want t
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