Re: Re: LPG Tractors

Posted by JH to JT on January 11, 2003 at 21:33:25 from (63.160.198.88):

In Reply to: Re: LPG Tractors posted by JT on January 11, 2003 at 13:57:41:

I farmed with propane powered tractors since the 50's And have done several pickup and tractor conversions. I always loved how mild mannered my old GB Molines were on propane. Oil would never get dirty,only get thick from heat. You filled the crankcase with clean #30 and drained clean #50. Later when farming on my own and with land payments taking up most of the money.I farmed with 1950T Olivers repowered with propane fueled 454 Chevy engines.These tractors were avalible cheap with low hours and a blown up 310 walkashaw exploder motor I farm with newer stuff now,but still use the old Olivers for front end loader and snowblower tractors. I put well over 6000 hrs(20 years) on the 454's on propane without no repairs. I had to replace a head gasket on one a few years ago and found 0 cylinder wear/ridge with all those hours. love that dry clean propane.
I also found out that the reason a dual fuel setup loses power on propane is that with the propane mixer on top of the gasoline carb,the engine is starved for air. The propane vapor displaces some of the air the engine would normally get while running on gasoline. I found that if I oversize the gasoline carb by about 20% the engine will get enough air/propane mix to match the gasoline power levels. If you compare a tractor gasoline and propane carb for the same model,you will see that the venturi and throttle bore is always larger in the propane carb. I built a 292 Chevy for my pickup with 9-1/2 compression which is near toe top limit for gasoline and great for propane. It has an aftermarket intake manifold with large 2 bbl gas carb and an IMCO 300 mixer. I run a ported head with oversize valves and a header. This has been a great little dual fuel engine for the last 150K miles.

Follow Ups:

• Re: Re: Re: LPG Tractors Bret 05:34:21 01/15/03 (0)

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