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Tractor Pulling Discussion Forum

Re: JD A Engine Rebuild

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buickanddeere

07-03-2013 07:16:19
184.151.61.191



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We have yet to hear about cam duration. Mechanical compression ratio alone doesn't mean d!ck all . Did the piston manufacture communicate with the cam grinder and have the components match? Even with LP this would be the time to mill the eyebrows off. The eyebrows were only there on Cyclone heads to add swirl to the mixture to keep the air/fuel mixture mixed. Not required or even wanted with vapour fuel. As shown on the head cutaway. That other shrouded area around the intake valve should also be cut out to piston bore dia. This would have been the time to install over size valves too.

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