Propane Pickup

[Buckmaster81]

I picked up an old 1976 GMC K25 converted to propane. I was just curious if anyone on here has ever tuned on one of these propane systems?

 

[guywhofishes]

holy cow - a '76 propane? fascinating

 

[scrotcaster]

had a 1976 cheyenne in high school. Thing was a tank, loved that exhaust smell... iam not much help never had any reason to tune it , always ran like a top!

 

[MSA]

Hope it runs better than Jiffy's propane auger.

 

[FishReaper]

whats she doing? I deal with a few LP engines at work

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Hope it runs better than Jiffy's propane auger.

Remind me never to get on your bad side.

 

[Wild and Free]

Been around a few older 70's era propane pickups and all ran excellent, never had to tune one either. Thy burn clean, I know guys who ran 200k+ miles on old propane chevys and did 10K oil changes and the oil still looked and smelled new even at 10 k miles.

 

[Captain Ahab]

A friends Grandpa had one of those back in the just learning to drive days. That old 400 on 'pane could really light up the tires.

 

[MSA]

A friends Grandpa had one of those back in the just learning to drive days. That old 400 on 'pane could really light up the tires.

I bet it couldn't cut a hole in ice.

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whats she doing? I deal with a few LP engines at work

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Remind me never to get on your bad side.

Just don't use the word propane around me.

 

[Enslow]

Propane conversion kits are cool. I have read that they are great for turbo boosted vehicles due to the 110 octane.

 

[Kurtr]

I picked up an old 1976 GMC K25 converted to propane. I was just curious if anyone on here has ever tuned on one of these propane systems?

it wasnt by chance the one that was for sale in herried sd?

 

[Buckmaster81]

Nope come from central ND. As far as the issues go I am having trouble with it idling at a very low speed, and rough idle when cold. I have tried adjusting the idle speed screw on the linkage/carburetor and the idle speed never increased. Is there any way to adjust the fuel mixture i.e. rich/lean?

 

[FishReaper]

Nope come from central ND. As far as the issues go I am having trouble with it idling at a very low speed, and rough idle when cold. I have tried adjusting the idle speed screw on the linkage/carburetor and the idle speed never increased. Is there any way to adjust the fuel mixture i.e. rich/lean?

depends on what setup it has, most gas engines converted to propane dont run well when they are cold. they have too low of compression. ( MSA can tell about it but grab a beer and popcorn) the problem may not be your carb but your Mixer i believe they are called

 

[johnr]

What is the general purpose of said vehicle?

 

[Twitch]

I bet it couldn't cut a hole in ice.

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Just don't use the word propane around me.

Holy hell are all your grills charcoal now too;:;rofl

 

[Davey Crockett]

Does it seem to run the same on Gasoline as it does on propane, Or is it not an aftermarket kit that you can switch back and forth ? A neighbor had a conversion kit on a mid 70s chevy it still ran flawlessly with well over 200K miles on it. It had less power on propane and when it was cold outside he started it on gasoline then switched to propane. That's all I know.

 

[Kurtr]

Nope come from central ND. As far as the issues go I am having trouble with it idling at a very low speed, and rough idle when cold. I have tried adjusting the idle speed screw on the linkage/carburetor and the idle speed never increased. Is there any way to adjust the fuel mixture i.e. rich/lean?

That's good news as the one I was talking about would be trouble.

 

[wby257]

I had a 78 chevy with a 1972 396. I could switch mine over from propane to gas. I would switch it over at nite in the winter to gas as the regulator would freeze up when tryng to prime it for propane. I was running 28 cent a gallon propane in it compared to 1$ gas. I didn't get the milage put I could run along time on 114 gallon take filled to 85%. Roughly 100 gallons for $28.00. So it was cheap to run.

 

[Buckmaster81]

What is the general purpose of said vehicle?

Little bit of hunting little bit of fishing and general tomfoolery

 

[johnr]

Excellent

 

[SDMF]

Been around a few older 70's era propane pickups and all ran excellent, never had to tune one either. Thy burn clean, I know guys who ran 200k+ miles on old propane chevys and did 10K oil changes and the oil still looked and smelled new even at 10 k miles.

Guy who lived across the street from my parents had 2 of them. A late 70's 1/2T w/350 2bbl that was a bit weak and a mid-80's 3/4T w/350 4bbl that worked very well. Just like above. 10K oil changes on synthetic and over 200K and running just fine when the truck got totaled.