Posted by jdemaris on November 08, 2010 at 07:19:55 from (67.142.130.37):
In Reply to: apples and oranges posted by buickanddeere on November 08, 2010 at 04:03:19:
One problem with gas engines in farm tractors is they need low compression ratios since many if not most farmers used cheap, low octane fuel.
Oliver was one of the few that took risks by offering a high compression gas engine in a farm tractor. That tractor still holds the world record for gas-engine efficiency in a farm tractor. It beats many diesels. In fact, it beat 57 diesel farm tractors tested at Nebraska.
Oliver 1800, Nebraska Test # 766 in 1960 (record holder). 265 c.i. engine with 3.75" bore by 4" stroke. 8.5 to 1 compression ratio and 92 octane gasoline. Tested making 74 horsepower with a fuel efficiency rating of 13.1 horsepower hours per gallon.
Oliver 1850, Nebraska Test # 874 in 1964. 265 c.i. engine with 3.75" bore by 4" stroke. 8.5 to 1 compression ratio and tested with 92 octane gasoline. Tested making 66.7 horsepower with a fuel efficiency rating of 11.7 horsepower hours per gallon.
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