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Tractor Pulling Discussion Forum

Re: John Deere 70

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M2B

07-08-2013 04:48:57
174.228.192.18



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Tractor has two 12 volt batteries and I'm pretty sure it has oo cable the starter just caint hardly pull it through compression. How can we get in touch with Mark?




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buickanddeere

07-10-2013 07:19:27
65.73.136.6



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 Re: John Deere 70 in reply to M2B, 07-08-2013 04:48:57  
Too much mechanical compression and/or too short of cam duration. Compression pressure does not directly equal HP. If more , more and more compression pressure improved the Brayton Cycle heat engine. Why are not diesels running 30 to 1 compression? Torque on the crank is the difference between compression pressure and combustion pressure. Higher compression pressure without gaining a corresponding greater amount of combustion pressure does not equal more torque. Working or effective pressure is a function of heat and pressure. In short. Odds are that tractor would make more power with more cam to let it breath.

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