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Counter-rotation not really a problem... By Dan Davis - 07/30/2002 8:30:33 PM; IP 166.90.232.78 ...as the only difference is the oil control knurls. You need to remove the knurls on the crankshaft at the rear main seal area. You see, on a reverse rotation engine, they reverse the knurls. The knurl is to force oil away from the rope seal. They are not needed if you use a split-lip style seal. The reversed knurls would force oil out of the engine at the rear main seal – even a split-lip seal would not seal it. The last reverse rotation engine I converted, I took the crank to Moldex and had them polish out the knurls without taking off too much metal, otherwise the split-lip seal will not seal. Total cost $35. Runs fine, no leaks. The other differences are that the cam & distributor gears are cut in a reverse direction so that the distributor turns in the normal direction. The cam is also ground on a centerline about 90° from normal rotation. This required a different firing order from normal, 1-8-7-3-6-2-4-5 versus the standard 1-5-4-2-6-3-7-8. Cheers, Dan

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Skip Navigation Links.  This fellow got two free 427's -- David Thayer, 07/30/2002  I don't suppose he'd . . . -- Orin, 07/30/2002  or double his money! <G> N/M. -- hawkrod, 07/30/2002  RE: I don't suppose he'd . . . -- David Thayer, 07/30/2002  Interesting, but with a problem -- John, 07/30/2002  RE: 390 cranks -- David Thayer, 07/30/2002 Counter-rotation not really a problem... -- Dan Davis, 07/30/2002

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