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Farmall & IHC Tractors Discussion Forum
Show Parts for Model:

gas to propane= power loss

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red-in-ok

05-16-2009 10:02:15
166.128.173.137



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Does anyone now how much or what percentage of horsepower is lost by changing a gas engine to propane?




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Owen Aaland

05-17-2009 23:15:23
65.165.246.54



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
The newer liquid propane injection systems will add horsepower to an engine. The propane injected into the intake manifold cools the air so that more can be drawn into the cylinders on the intake stroke. Air temperature at the intake valve can approach -40 degrees under full load conditions. An 8.1L GM engine can gain 15 to 20 HP over the gasoline system.



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red-in-ok

05-17-2009 11:16:27
166.128.7.191



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
Thanks everyone for the feedback. I think I'm going to go ahead and change it. Since propane smells a lot cleaner than that ol' gasoline exhaust smell. I can live with the power loss.



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farmalldanzil

05-17-2009 05:31:00
72.215.0.62



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
Here is the BTU's for most fuels.
Propane---91,600
Gasoline---125,000
Ethanol----76,000
Fuel Oil----#2/139,000. #4/145,000. #6/150,000.
You are moved by BTU's
thank Dan. I for got to add per Gal.
This post was edited by farmalldanzil at 05:32:23 05/17/09.



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NDS

05-17-2009 05:29:18
205.188.116.73



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
Have run in field with both gasoline and propane Ms. The propane tractors had compression bumped up and timing advanced when they were converted and would run with gasoline tractor all day, maybe a little stronger.



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eurofarmer

05-16-2009 23:48:01
86.95.177.224



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
Hello,
I installed LP in my 1982 Blazer and it is running better then ever before. The oil is clean all the time. Don t think I lost any power, just the milage is down a little bit.



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ozarker

05-16-2009 18:55:34
64.85.222.100



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
The old rule of thumb was 1.2 gal of LP equaled 1 gal of Gasoline equaled .8 gal of Diesel. The technology of both fuels and engines has changed a lot since the 1960's though.

Bob



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mattofvinings

05-16-2009 17:15:08
75.131.212.224



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
I was going to guess at 15% loss, or 85% of gasoline rated.

Couple nice things with LPG systems (at least the "modern" systems used on forklifts...never any carb or fuel gumming issues, they can sit for 10 years and fire right over).

The engine oil is sooo much cleaner...really impressive.

IMHO the ignition system needs to be in top shape for LPG operation...there's seemingly a lot more water generated during cold operation...could be related to the more complete combustion reaction.

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teddy52food

05-17-2009 05:44:34
209.237.111.169



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 Re: gas to propane= power loss in reply to mattofvinings, 05-16-2009 17:15:08  
Propane contains more hydrogen. H + O = H2O (water)



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the Unforgiven

05-16-2009 12:11:06
66.146.251.90



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 Re: gas to propane= power loss in reply to red-in-ok, 05-16-2009 10:02:15  
I am going to GUESS 10 or 15 percent. If you do it right and raise the compression a little you will have no loss.



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