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Autogas/Propane conversion

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Old Mar 16, 2015 | 12:59 PM
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anesthes's Avatar
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From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Autogas/Propane conversion

Has anyone here had any experience doing one?

These stations seem to be popping up everywhere. Autogas/Propane/Lpg seems to be 110 octane (advertised) at the stations. I wonder how it would work in a turbocharged motor.

-- Joe
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Old Mar 28, 2015 | 09:29 AM
  #2  
Drac0nic's Avatar
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Re: Autogas/Propane conversion

Propane is a really neat fuel for this kind of thing. It's high octane and likes high compression to make optimal power so those are good traits for forced induction. I believe this is way more common in Australlia so you may want to start looking towards any aussie car forums you can find.

That being said though, the US made Impco/Century vaporizers are supposedly good to ~8 PSI before the lid starts deforming. That would be a blow through setup of course. If you wanted to try a draw though setup you may be able to do a good bit better.

In cold weather I could see issues with the tanks freezing up if you're pulling off super fast. Not a challenge for most people who aren't hammering their high HP cars in the winter.

Lastly, for heavily regulated areas this is a pretty neat deal. Many states offer an alternative fuels exemption for emissions, and LPG burns very clean anyways.

Jay Carter had a Propane injection system similar in function to methanol injection as well. Not sure what became of it though. Obviously that was used with a standard fuel system not as a standalone replacement.

If I ever get a chance to, I want to get an air to water IC to use as the vaporizer then do an orfice setup like an HVAC system into it. That way you get the cooling benefits of vaporizing the LPG as well as the octane benefits.
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