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Old 12-24-2004, 11:55 AM
brown79 brown79 is offline
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propane?

my unit (79 f150 2wd 460 auto) runs on propane. i want more horse power but the propane here is 58% cheaper than 87 octane gas. any ideas?
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Old 12-24-2004, 01:20 PM
ranger429 ranger429 is offline
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Change it back and start running gas. If you want more power you have to give up something.
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Old 12-24-2004, 01:22 PM
84-250 84-250 is offline
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rebuild the engine with higher compression- 11:1 or around there
rebuild the engine for twin turbos (forged internals)
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Old 12-25-2004, 10:40 AM
canda250 canda250 is offline
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I have 2- 1979 Ford trucks on propane. If your truck has been on propane all its life like mine, the heads and carb will be damaged and have to be replaced along with any other rubber fuel line parts. I need a rebuild on the bearings on my 302 and intend to put mine on unleaded during this process. I live in OK and propane is not cheap.
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Old 12-25-2004, 12:23 PM
ivanribic ivanribic is offline
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Quote:
Originally Posted by 84-250
rebuild the engine with higher compression- 11:1 or around there
This is what I would do if propane was that much cheaper than gas. I believe propane is around 110 octane so you can run extremely high compression on it. Some of the guys with propane powered competitoin buggies are running 13:1.
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Old 12-25-2004, 11:18 PM
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Quote:
Originally Posted by ivanribic
This is what I would do if propane was that much cheaper than gas. I believe propane is around 110 octane so you can run extremely high compression on it. Some of the guys with propane powered competitoin buggies are running 13:1.

Actually propane is 118 octane. You could go higher than 13:1, Cummins makes 2 versions of it's B series diesel converted to run on either LPG or CNG and if I'm not mistaken they are around 18:1. You also need to advance the timing running propane and you could even have the Distrib advance recurved.
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Old 01-01-2005, 01:37 AM
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hey guy's,does any body know any good book's or source's for info on installing and tuning propane.any help would be great,thanx/scott.
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Old 01-01-2005, 02:22 AM
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Old 01-01-2005, 10:14 AM
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hey dave,thanx/scott.
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Old 01-01-2005, 10:14 AM
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