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Old 12-06-2008, 01:21 AM
Demonknight Demonknight is offline
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Propane specs

I have botha 1979 B-700 (bus) that is running propane, and a 1966 F-250...if I go with propane on a re-built 390 what kind of compression, and or specs should I be looking for?
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Old 03-30-2009, 10:31 AM
65superduty 65superduty is offline
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if you are going to run propane only, then my logic tells me since propane is roughly the equivalent to 114 octane gasoline(minus some btu's), you should run about 10:1 compression to optimize the available propane btu's. i would also go with an advanced curve distributor to further optimize the propane. an rv grind cam would be about the highest lift and duration i'd go ( from talking to other guys with more experience with propane only ). they told me propane doesn't like a lot of cam. hope this helps...
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