| Question About Propane Conversions And Air/Fuel Mixture [message #197072] |
Fri, 01 February 2013 12:08  |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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I am really ignorant about propane power, so go ahead and laugh and scoff.
It seems to me that the throttle controls the amount of propane that enters the system, which immediately becomes a gas (if not already in that state before it gets to the throttle). What controls the amount of air that mixes with the propane? is it just a function of how fast the engine is running and pulling more air as it turns faster?
There was a thread here about starting a small engine with propane, and then there was a thread about squirting starting fluid in the 455 to enable it to clear an intersection if the fuel delivery system failed.
So I couldn't sleep last night and one thing that popped into my head was, if the fuel delivery system failed on the highway, and I had the parts to cobble together a line from the propane tank to the carb, could I get a few miles down the road to the next off-ramp, or would I run the risk of burning a valve or two due to a too lean mixture?
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| Re: Question About Propane Conversions And Air/Fuel Mixture [message #197122 is a reply to message #197087] |
Sat, 02 February 2013 09:58  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| A Hamilto wrote on Fri, 01 February 2013 15:45 |
It is beginning to look like the complexity of using your propane reservoir as a backup/temporary fuel supply (in case of gas fuel system failure) is more complicated than it might be worth.
If it was just a matter of running a line and pointing a nozzle at the carb inlet, that would be one thing, but having to install a full-blown replacement for the carb defeats the purpose of "quick and dirty".
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Though the idea looks attractive, the immediate problem is that the engine systems need more propane than can be pulled out of a tank as a gas and so must pull liquid and evaporate it outside the tank. Believe it or not, there are systems that pull both liquid and gas from the same LPG tank, but this is not something that can be retro-fit with any ease.
On a very few unfortunate occasions, I tried to pull gas out of an LP tank at those rates. It only lasted until the entire tanks frosted up.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Question About Propane Conversions And Air/Fuel Mixture [message #197124 is a reply to message #197072] |
Sat, 02 February 2013 10:14 |
rcjordan
Messages: 1913
Registered: October 2012
Location: Elizabeth City, North Car...
Karma: 1
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JimB is shipping LP conversions to Europe. I'm guessing the last one was that rear-door yellow one that was on his lot last December. I believe Jim said the interior was gutted and he fitted the coach with a 47 gallon tank.
SOLD 77 Royale Coachmen Side Dry Bath
76 Birchaven Coachmen Side Wet Bath
76 Eleganza
Elizabeth City, NC
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