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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "Propane Conversion to the 4.7L", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
If you could get around paying tax on the propane it might be worth the conversion. Farmers for example have very large propane tanks used for drying corn, this allows them a way around the tax.
I wondered if anybody has found out more about this since this thread was posted? I have had 3 vehicles that I converted to propane but they all had carborators so this was quite easy. They could also go back and forth between gas and lpg. It was fun to get my emission test and watch the folks stare at results wondering what was wrong with their equipment. One guy remarked that he had never seen such low emission on a vehicle before, and this was an '86 F150.
I would like to do this to my 2001 Tundra but being fuel injected it is not as easy to make the conversion. I believe it requires a new computer to regulate injectors. Don't know if you need new injectors or if you still run off of gas or lpg with just fuel shutoffs and some sort of switch for the computer. Given that it is a bit of pain to find propane while traveling across the West, I probably won't consider the conversion if I can't retain the option to run off gas. Does anybody know a website to find this equipment?
Although it is a bit late (i am new to the forum), i can say that my 2004 dcab runs on lpg. Over here we use a lpi system which means that the lpg is injected and not premixed.
Yes it has been do befor and no there is not a kit for it sorry but if you like i can find the plans that i made for my 4.7 so anyways look for the post every body that has been asking about this..
resurrecting again. with gas prices approaching $4/gallon (or more depending on where you live), how does the ratio of cost per gallon vs miles per gallon now play out?
I have a LX470 in Australia, and with the newer LPG injection kits, milage is nearly the same as Petrol, and power is increased, and that is with a dual fuel kit.
if anybody finds out anything please let me know. i called a couple of people in Dallas and they told me that there was a approved epa kit for our trucks.
__________________ 2006 DC,4x4, TRD pkg, cold pkg, debadged, tow package, almost all blacked out, 7% front window tint and 5% back windows (legal medical exemption)
I worked in alternative fuels for just over a year, working on fuel injectors.
typically you lose horsepower on the conversion, but if you build the engine and tuning around it, you can actually GAIN horsepower. Since propane is a much higher octane, you can run higher performance parts and tunes, which will make up for the lack of BTU's.
Propane is a fairly dirty fuel, we had issues with fuel injectors getting dirty pretty quickly which would cause very poor cold temperature performance. The dirt, which was slimy, would freeze up inside the injectors. Not sure if they ever fixed that or not.
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