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Tractor Talk Discussion Board

Re: Re: Re: Re: propane?

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Posted by Harold H on July 01, 1999 at 17:14:20 from (207.244.7.99):

In Reply to: Re: Re: Re: propane? posted by Paul on June 30, 1999 at 17:30:29:

Paul,

Primarly the higher compression ratio was the way the manufacturer obtained about the same or a little more horsepower from their LPG models vs their gasoline models. For example, The Farmall 450 gasoline had a compression ratio of 6.6 to 1 whereas the Farmall 450 LPG had a compression ratio of 8.35 to 1. The John Deere 620 gasoline had a compression ratio of 6.38 to 1 whereas the John Deere 620 LPG had a compression ratio of 8.10 to 1. All factory LPG tractors used this same approach plus valve rotators and hardened seats.

Harold H

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