Posted by LarryM on September 11, 2009 at 14:05:52 from (64.198.86.189):
In Reply to: Re: Spark Plug posted by soybeanjoe on September 11, 2009 at 05:58:09:
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 storng 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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