timing on propane engine
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Fleet Mechanic
Joined: Jan 2013
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timing on propane engine
i have a 1994 f250 351w c6 on propane only. previous owner had dual fuel then decided to go with straight propane; removed both gas tanks. i don't know what else, if anything was removed.
i need to get this truck through emissions testing and so i am giving it new : cap, rotor, plugs, wires, air filter, and oil change.
my question is : what should the timing be set at for this engine to run on propane ? i am not even sure if it has a spout connector on this year but, if it does, should it be disconnected ?
the truck actually runs fine (except for an up-and-down idle during warm-up only) but it's due for the tune-up anyway.
i need to get this truck through emissions testing and so i am giving it new : cap, rotor, plugs, wires, air filter, and oil change.
my question is : what should the timing be set at for this engine to run on propane ? i am not even sure if it has a spout connector on this year but, if it does, should it be disconnected ?
the truck actually runs fine (except for an up-and-down idle during warm-up only) but it's due for the tune-up anyway.
Elder User
Joined: Mar 2005
Posts: 549
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From: chicago burbs
you will get better and more in general response in the gasser section. Diesels use propane like you would use nitrous. Try the alt fuels section under gas performance I believe. Smart guys over there too!
Senior User
Joined: Nov 2005
Posts: 307
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From: central texas
usually propane powered engines timing is set a few degrees early... if you can find a local propane distributer. that sells or knows a installer. they will be able to give you the correct settings.
if you ever need to remove the heads, have them shaved or do it right ... install high compression pistons and rods... 12:1 would be a good place to set the engine up for, as propane has 105+ octane....
the higher compression will give you more power and mileage...
if you ever need to remove the heads, have them shaved or do it right ... install high compression pistons and rods... 12:1 would be a good place to set the engine up for, as propane has 105+ octane....
the higher compression will give you more power and mileage...
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VirginiaWiFinder
1967 - 1972 F-100 & Larger F-Series Trucks
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Sep 2, 2005 01:30 AM
