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Tractor Pulling Discussion Forum

Re: JD A Engine Rebuild

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buickanddeere

07-02-2013 07:15:27
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Have the cam and followers reground . They are worn. It will need fresh guides. Use a rotary cutter like what they use for cutting valve seat inserts. And mill the eyebrow off from around the inlet. Have a performance 5 angle valve and seat performed. Match the manifolds to the ports. Ground the rough edges out of the ports. If the block cleans up with 45 thou, stop there. There is no measurable difference in power between 45,90 and 125. Use model 60 LP pistons. Run 91 octane gasoline. Use a dyno to dial in the timing and mixture. A "stock" motor " blueprinted" will make a surprising amount of power.

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