I'm not sure...still in the experimenting stage. I'm actually just using a 20 gallon typical BBQ tank. This provides straight vapor to the Torque-Pro 2000 propane system. When I bought the kit used it came with a 38 gallon(I believe) under body mount tank that is D.O.T. approved and provides LP in a liquid state. Actually, liquid is best because the Torque-Pro utilizes the trucks cooling system to convert liquid to vapor. The liquid form also keeps the Torque-Pro manifold cool. Right now, with this temporary BBQ tank set up, the manifold is HOT, but safe. As soon as I run this BBQ tank down and mount the 38 gallon Manchester tank under my truck and run that down, I'll keep you posted. I feel with the "on at 7 psi boost" that I have it at now, I will deplete my tanks rather quickly. I might have to adjust it to come on at 10 maybe 15 psi boost. Carmyne

 

Hi Carmyne- The temps sound more realistic, I feel better now that you hit 1000 degrees.

The "38 gallon" tank is probably a 10 gallon unit, equal to a couple BBQ tanks (it says "WC 38" on the side, right?). Check the date on it and make sure it's not more than 12 years old. If it's getting close you might want to get it recertified before you install it so you don't have to drop it in a year or two. A welding supply company, or a propane company that does forklift cylinder delivery can recertify it for you. It's just a visual inspection and leak check, if they want more than $15 to do it ask them for a kiss afterwards.

Most of the propane kit manufacturers say that you burn propane at a 1:4 ratio to diesel, so the underbed tank ought to get you through a couple tanks of diesel unless you wait until the gauge reads "E" to fill up.

I like the kit that you're using better than the vapor kits, the metering and power increase is much more consistent on a liquid system. Have you found a good place to get the underbed tank filled? The going rate where I work is a little under $2.00 a gallon, but I'm sure CA prices will be higher.

 

Dude, you are the diesel stud guru, you know that? I don't think there is anyone or anything that you haven't advised anyone on this site on!

 

I know a little bit about a lot of stuff, but not a lot about anything.

Propane is something I know a little bit about - I drive a truck loaded with it (and other gases) every day. When I first got my Dodge I did a lot of homework on propane systems since I can get parts and propane for free or close to it. I decided against running propane because I can't leave anything alone - I'd blow it up for sure running propane.

 

Wannadiesel, If you don't mind, I'll refer to you as DieselGuru, is there going to be a concern about cost issues for a D.O.T. under bed mount propane tank versus mounting that same tank in the bed of the truck? I've considered this option, due to the fact that that tank might not fit under my truck. It is 10" in diameter and 41" long with graduating bracket holes on each end of the tank(long dimension ends). The exhaust pipe side is out, so that leaves the cubby space around the fuel tank. I haven't actually pulled a tape under the truck, just a visual. A local RV supply store told me if they notice that the tank is for providing DRIVING fuel and not for camping purposes, no go on the fill! Guru, what are your thoughts? Carmyne

 

just run a 10 gal forklift bottle mounted in the bed. jiMMy

 

If you can mount it right side up, with the fill valve accessible inside the bed I don't see a problem with that. That's a bigger tank than I thought you had, sounds like it would hold 12 - 15 gallons.

The RV place doesn't want to get busted for selling on-road vehicle fuel without collecting the taxes. Technically you should be paying road use taxes by the gallon on the propane. It's just like veggie oil conversions, people who run veggie are supposed to pay tax by the gallon.

Jimmy's suggestion is a good one for avoiding fuel tax difficulties or if you just can't fit the big tank under there. You can set the bed up with a quick release strap and an Acme fitting like a forklift, buy a 33# forklift cylinder (holds 7.4 gallons) and stop at a welding supply or propane outfit to have it filled as required. If you disconnect it before you get there I don't think they'll ask any stupid questions.

 

my egt gauge started reading low last summer. had trouble finding the problem. turned out to be the connection on the back of the gauge. wasnt loose looked clean. took it off cleaned it cured the problem.