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Discussion Starter · #1 ·
Was at the boneyard today, and saw a chrysler car about 1986 or so, and looked on the tag that has the engine info on it, and it was a 5.? litre engine. then i looked on the other part of the tag, and here is what it said:
"Idle - 650 rpm
Fast Idle - 1700 rpm
Propane Idle - 750 rpm"

did these chrysler cars run on propane stock? I mean, hell, it was on the damn factory sticker. N E one have more info on this? <IMG SRC="smilies/question.gif" border="0"> <IMG SRC="smilies/question.gif" border="0">
 

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I may be wrong but I've never heard of any manufacturer using propane in a stock motor from the factory unless it was some experimental vehicle to explore the possibilities of using propane instead of gas.
 

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Come out of the cave dude...they've been using propane it cars and trucks for years...I can remember my dads dual fuel Ford Ranger Explorer from the 80's that held 50 Gallons of Leaded Fuel and 42 Gallons of Propane right from Ford...It was under powered with propane but had one hell of a range...sucked at the pump! In most cars or trucks it has been a factory option, but expensive! Or the vehicle could've been converted at the dealership....
 

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Discussion Starter · #4 ·
:head_poking_out_of_cave_entrance:
<IMG SRC="smilies/devil.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
thats interesting... I never would have thought that it would come stock on a production vehicle.

Just how underpowered were they? I mean It couldnt be that bad, since come of the people on here run propane on their rigs, so it couldnt be that worthless
 

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"Propane enriched idle speed" Is a spec. used for adjusting the fuk'n carb...In the old days.

sheesh !
 

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I dont know of any cars in the 80's that were factory set up for propane,however, in the early 90's Chrysler did make some "flex fuel" vehicles which could be run on differing blends of methanol and gasoline. In the late 90's some of the manufacturers produced vehicles that run on natural gas.
 

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Originally posted by Spark Vark:
<STRONG>:head_poking_out_of_cave_entrance:
<IMG SRC="smilies/devil.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
thats interesting... I never would have thought that it would come stock on a production vehicle.

Just how underpowered were they? I mean It couldnt be that bad, since come of the people on here run propane on their rigs, so it couldnt be that worthless</STRONG>
You barely notice the underpower effect. I run propane setup with gasoline setup and I am happy with it.
 

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Neighbours dodge 80’s something diplomat is ***factory*** propane but it also was a cop car to
 

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It wasn't terrible but you could notice it but with a 5/8's wrench and you could make it decent again but was felt...The engine ran very clean and was worth it. It so happens that the car was a detective car and marked inside as alternative feul, so it could've been from up North!
 

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www.4x4.ee/gallery/jr/bronco_front_axle/images/bronco_axle45.jpg - tanks www.4x4.ee/gallery/jr/bronco_front_axle/images/bronco_axle49.jpg - vaporator and intake lines www.4x4.ee/gallery/jr/bronco_front_axle/images/bronco_axle50.jpg - backfire valves www.4x4.ee/gallery/jr/bronco_front_axle/images/bronco_axle51.jpg - overall pic

I am running 5,0 EFI engine. Propane system is hooked up to the intake lines right before the throttle body. System itself comes from LANDY, there was no kit availbale, so I had to choose from the catalog which parts to use. Vaporator is suitable up to 6 litre engine and intake lines just have to mach the ones you have. I think you can find pretty easyly the matching intake system for your Q-jet carb, it is the only thing what have to mach the existing system, since it goes right on the top of your Q-jet carb, or another option would be adding additional 'sprinklers' to the carb. It can be done by drilling holes right before the throttle valve.

It consumes as much propane as much gasoline. There is slight lack of power somewhere in the mid range, but nothing noticeable. Around here (Estonia) the propane costs half as much as gasoline, so it saves big $$$ <IMG SRC="smilies/smile.gif" border="0">. If you would like to get the most out of your propane system, then you should increase the compression ratio, change the timing, get ceramical coated headers and change the exhaust valves to something I can not remember. Propane has higher octane than gasoline and that is the reason you might have to do all that to get the most out of the propane system. If everything done correctly it can easily give an extra +50-100 hp's to your 350 engine. I am running currently all stock, no changes what so ever and I am happy with it.

jr www.4x4.ee

[ 10-21-2001: Message edited by: jr4x4ee ]
 

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I was thinking about an International 392 with 11 to 1 compression ratio (yes it can be done) and running it on propane with a short duration cam so I don’t lose my low end toque do you think this would work or will I run in to detention (pinging)


thanks
 

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I run propane also (dual fuel), an Impco 300 mixer on top of a #1406 EDL carb.

Financially it's a huge improvement (3:1 price difference), nor do i have problems with overly rich or lean conditions on steep angles, when the floats on the 1406 are acting up. I don't have a problem with the 5 to 10% horsepower loss. On propane it'll probly keep running when upside down. Not that i want to find out..
 

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Chief yelling alot said:
I was thinking about an International 392 with 11 to 1 compression ratio (yes it can be done) and running it on propane with a short duration cam so I don’t lose my low end toque do you think this would work or will I run in to detention (pinging)


thanks
So could you be put in detention for too much detonation? :flipoff2:
 

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Chief yelling alot said:
I was thinking about an International 392 with 11 to 1 compression ratio (yes it can be done) and running it on propane with a short duration cam so I don’t lose my low end toque do you think this would work or will I run in to detention (pinging)


thanks
My old 74 Chev 1 ton that I had in high school was powered by a 11.5:1 468 - ran good, lot's of power ( 4wd burn outs in the school parking lot ) only two problems with it.

1) Park it outside when it was -40 for more than a few hours and she wouldn't start up without help from a tiger torch.

2) High compression eats starters real fast. Had to get a gear reduction starter after about three months and four starters.
 
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