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post #1 of (permalink) Old 04-14-2003, 10:16 PM Thread Starter
 
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Question about running Propane in 258

I have been studying many site about running propane in carburated engines. Seems that it can be done and paid for by its self quickly.
Here is a site that i have found with many propane links:
Propane

With this i was wondering if the stock 258 distributor had enough power to spark the mixture and if it can advance the timming up as far as it needs to. Has anybody done one of these conversions or know of any information about them?

Thank you
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post #2 of (permalink) Old 04-14-2003, 11:21 PM
 
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Re: Question about running Propane in 258

It will work on any solid engine. The tanks are bulky and converted engines lose some horsepower, but the fuel is cheaper and cleaner burning.
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post #3 of (permalink) Old 04-16-2003, 08:54 AM
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Re: Question about running Propane in 258

Just a note, you can purchase fuel without paying road taxes or whatever they are called. But, if you operate on the public roads, technically you are supposed to pay these taxes. If you don't and get stopped, you are basically exercising tax evasion and can be summoned for same.

Now, with that said, some friends had a stock (cattle) truck, a mid 60's international that the Forest Service had converted to LP. The truck lost about 1/3 of its power, but ran much cleaner. The engine when it was finally rebuilt, was found to be extremely clean compared to an equivalent gasoline engine. One done fall, propane does not vaporize below -30F, and here that is quite common. A tank that provides a large liquid surface area is needed to provide sufficient vaporiziation to keep an engine operating even around 0 degrees F. If you live in a warm climate, no problem, or you can provide tank heaters.
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post #4 of (permalink) Old 04-16-2003, 08:59 AM
 
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Re: Question about running Propane in 258

You can offset the power loss by increasing the compression ratio to 12:1.
Your ignition can be modified very easily/cheaply to produce a much better spark. Do a search for TFI ignition or TR ignition
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post #5 of (permalink) Old 04-16-2003, 09:11 AM
 
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Re: Question about running Propane in 258

I guess that explains why my friend parked his propane powered truck for the winter. Taxi cabs do run it year round, but I suspect those engines run continuously or are parked in heated garages when resting. Perhaps someone has come up with a tank heating system running off the coolant lines?
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post #6 of (permalink) Old 04-16-2003, 05:20 PM Thread Starter
 
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Re: Question about running Propane in 258

Alright, i do have a contninuing question about the Cold weather stuff. I am almost positive that i read propane will not vaporize untill very low subzero temperatures and that is basiclly FI for a Carburator with its cold weather starts...

About this tas evasion stuff. Would the local goverment really pin you down for having a clean burning vehicle and not throwin too much junk in the air? Well, nevermind, this is the goverment and they want all the money they need! [img]images/graemlins/cussing.gif[/img]

Advancing the timming is no problem. What about increasing the compression ratio. How does a person go about doin this in a 258? I have never seen a 12:1 piston for the 258, pr have i not been looking hard enough?
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