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biostroke1
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Discussion Starter #1
Ive just recently bought a used MSD propane injection kit for my 02 7.3 cc 4x4 longbed. The truck has a 4" lift running 285 75 16 tires. I was wondering if anyone else is still running propane and what kind of real world mpg gains could I expect? I drive 50/50 highway and city. I drive fairly conservative. The ony mods so far is a afe pro dry air filter and a sct programmer. I have not yet installed the propane injection. Thanks
 

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I have been using propane for about 300k. You will save a small amount on your fuel cost DEPENDING on the cost of the propane. I saw the biggest savings when pulling any large load and the least when running empty.
If someone with the proper equipment such as MSD were to do some R & D concerning MPG gains using propane I think that some noticable savings are possible. But due to propane's bad reputation there is no demand from the buying public to warrant a company to invest any funds in R & D
 

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biostroke1
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Discussion Starter #5
So it sounds like as long as propane doesnt go up w/ the rising coast of diesel there could be fair amount of savings.
 

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go to page 8 here on the MPG- fuel economy discussion and look at the thread -new propane data. I think the money saved is minimal unless you can get propane substancially cheaper than what I see in my area.

This test that I performed was the only time that I put forth the effort to gather any data. In my opinion if you get a 20+ gallon propane tank,then the biggest advantage is increased distance between fill ups along with an increase in horsepower.

I really wish that someone with the proper equipment would do some extensive testing to see if there were any real savings to be had pertaining to propane injection into a modern diesel engine.
 

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Jack Ken
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215 Posts
Look in to a company called Fire Em Up. They have been building LP Injection kits for over the road trucks for close to 10 years. I have installed a few on farm equipment and they love it. I did have one on my brothers old 7.3 he would see about a 4 mpg increase when using LP.

The key to making it work with out blowing anything up is to inject the correct amount. The trouble comes from getting to agressive with the LP or with the diesel timing, the LP speeds up the flame front.

I will be installing Fire em up's "Diesel Magnum" on our EX. sometime this year.
 

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biostroke1
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217 Posts
Discussion Starter #8
The propane kit I have is made by MSD/ Superchips and is computer controlled so it wont overdue the amount of propane injected @ any given time. I live in Il and the kit is in Az @ my folks house so Im waiting for them to come back to Il for the summer and bring the kit w/ em. so as soon as it comes Ill install it and post all of my data as I get it.
 

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before you claim any mpg gains, remember to factor in the cost of the propane.
best way with a combo like that is to look at $/Mi.
 

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biostroke1
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217 Posts
Discussion Starter #10
Once I install the kit Ill do some shopping before I fill up the tanks but yes, Ill be sure to factor all costs in.
 

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I have a Msd set up for sale if anyone would like it. Major increase in power but not a big enough save in cost for me.... let me know its still partially on the truck just havent finished taking it off.
 
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