Propane injection?
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Posting Guru
Joined: Jul 2003
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From: Eureka, Ca.
Propane injection?
I am considering propane to run my new project. It is a 4x4 that will see some extreme angles. Has anyone ever done this. What is the cost? What are the performance issues? Would EFI be better?
Thanks
Thanks
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
I ran propane in a tow truck once. It had a 370 Lima engine in it. I don't know if the 370 is gutless in gas form but it sure was on propane. Propane has less energy than gasoline but has a higher octane so I think you need to have higher than normal compressions to run it. I can't beleive your thread got to the bottom of the page with no replies. I didn't even see it earlier. Wierd!
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
Randy, you and Russ should get together and have an "undecided" festival :-) You guys have the always changing projects!
You need to go PSD on your 4x4 project :-) I'm sure that will get me kicked out of the FE forum.
You need to go PSD on your 4x4 project :-) I'm sure that will get me kicked out of the FE forum.
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Posting Guru
Joined: Jul 2003
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From: Eureka, Ca.
Thanks, Sean
Sorry greg, No Desiels. I don't know the first thing about wirking on them. I read that you can run 12:1 CR with lpg. It is supposed to have a octane of 100. I just have never seen a hipo lpg setup. Or any lpg setup for that matter. It was a suggestion from the Off-road forum. Which by the way was very unpleasant. I think they were probly just making fun of me when they suggested this. I won't be going back.
Sorry greg, No Desiels. I don't know the first thing about wirking on them. I read that you can run 12:1 CR with lpg. It is supposed to have a octane of 100. I just have never seen a hipo lpg setup. Or any lpg setup for that matter. It was a suggestion from the Off-road forum. Which by the way was very unpleasant. I think they were probly just making fun of me when they suggested this. I won't be going back.
Posting Guru
Joined: Aug 2001
Posts: 2,117
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From: Evanston, WY
I think you would be much happier with EFI on a gasoline engine. It would be unaffected by angles, give great throttle response, and usually better mileage. Then you can use tried and true engine mods. There was a time in this area when Propane powered trucks were the rage, and everybody who had one was bragging up how cool they were. Interestingly, every person I knew who had one doesn't have one anymore.
-Scouder
-Scouder
Posting Guru
Joined: Nov 2002
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From: Napa
A good friend on mine had a mid 70's F150 4x4 that he ran on propane and gasoline. This truck was indestructable. He never had a problem using propane. He wasn't interested in speed. He would still have the truck today if it wasn't for that drunk driver 
I have only seen two or three propane four by's, and Larry's was by far the best. It was probably the exception to the rule from what I've heard since. Just wanted to let you know...it can be done with propane.
I have only seen two or three propane four by's, and Larry's was by far the best. It was probably the exception to the rule from what I've heard since. Just wanted to let you know...it can be done with propane.
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Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Yep it was me that did the fuel injection. It's a 700cfm Holley TBI system. You simply have a 4-barrel throttle body with 4 injectors on top spraying fuel down into each barrel. It comes complete with the Commander 950 ECU, and all the appropriate speed-density sensors, including an O2 sensor that I welded into the collector. I could see where you could run the thing at any angle needed.
If anyone gets one of these, I'll e-mail you the ECU map I'm using on mine so you can have a starting reference point for an FE. No FE maps are included with the system.
I think it would work great for off-roading.
If anyone gets one of these, I'll e-mail you the ECU map I'm using on mine so you can have a starting reference point for an FE. No FE maps are included with the system.
I think it would work great for off-roading.
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Thread Starter
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Posting Guru
Joined: Jul 2003
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From: Eureka, Ca.
Thanks for all the feedback. I was thinking of simplicaty with the propane. It seems simple from what I have read. Although the donar truck is a 92 F250 with all the EFI stuff. It still has the injectors and fuel rails no engine). I wounder how hard it would be to get my notor working with the factory EFI. Just have to have the intake drilled for the injectors and adapt a throttle body to it. Do you think it would be worth it?
Cargo Master
Joined: Aug 2003
Posts: 3,237
Likes: 3
From: Belleville, Ontario
Go Fast Propane
