Being the power hungry fool that i am i'm considering propane and have a stupid question to ask.

Is it injected pre or post turbo?

Post turbo, I'd think. I don't know if a charge air cooler would be effected by LPG vapors, probably not.

I bought a 100 LPG bed tank awhile back. I've been thinking 'bout the timing of adding propane and It's probably best after lowering the cr and building up the engine for performance, I.e. main girdle or splayed main kit, headstuds, bigger turbo, IC. So I'm waiting 'till my engine's ready and then I'm making my own set-up with forklift LPG solenoids relayed off a pressure switch (like an OPS tapped in the intake)for automatic shots over 10 psi or so.
I should be able to push 330-350hp by then.

So QM if you are not sure if its pre or post turbo who knows?

with the setup i have done on the duramax, i was told post turbo, and that is where i had installed it, i see your a liitle north of me, how do you like the westers tune, latter fred

The westers tune seems to be just fine, i will be trying to get back there this month to have some more fine tuning done and get on the dyno. The good thing about westers is he's the guy that does the programming, hell he even test drove the truck himself about 3 times on the first install with the Tech 2 in hand just to make sure things were working well, then he'd pull the computer, plug it into his main system and make more changes, lets see the mail order guys do that! If you can get your truck in there then the re-flash can be tuned specific to the truck. From what i've been told there's D'max's coming out of there with over 700HP when fully moded but i can't back that up.

we have a dyno day in calgary on the 19(events fourm) i see it calling you

"D'max's coming out of there with over 700HP" you gotta like it

That dyno day looks interesting but i doubt i could make it, it appears there are no 6.5's that will be there, i'd hate to beat up all those D'max's by myself...
:lol:

A small amount of propane is introduced into the air intake, between the filter and the turbo.

there is a few 6.5 on the books for the day, we need a good wipeen once in a while:D


That dyno day looks interesting but i doubt i could make it, it appears there are no 6.5's that will be there, i'd hate to beat up all those D'max's by myself...
:lol:

OK, now i have both post and pre turbo, which is correct or the best place, is there any difference? Personaly i think pre-turbo that way it will be mixed better on the way to the combustion chamber, no? But then again you'd also be heating the propane going through the turbo?

You are correct, the turbo acts as a mixer to help evenly distribute it. It is a very lean propane/air mixture, not really affected by the heat.

Not qualifed myself to say for sure no personal experience, but post turbo would be my guess, in proper METERED proportion, I say that because too much flow from a home built system could get ugly, I think you can go to Howie E's site http://mysite.verizon.net/vze54tx9/id5.html and he has a home built system that works for him, PM him for missing specifics

Well, think about this. If you add propane post turbo, as your boost increases, the flow of propane decreases. I personally don't want mine to work that way, plus I was planning on setting the propane to 6psi from the tank, to keep from having too much pressure. If I add post turbo, I have to run at least 20psi propane from the tank.
Just my thoughts.

You are correct, the turbo acts as a mixer to help evenly distribute it. It is a very lean propane/air mixture, not really affected by the heat.
do you feel you can run it the either way, or just run it pre turbo, i can switch back if so thanks fred

50/50 I got it wrong here is what Powershot says

Step 3: Remove air filter cover and air filter indicator, being sure to keep the rubber grommet. Run the fuel hose through the grommet making the fuel hose run down the inlet hose approx. 1 foot toward the turbo. (***Note- If truck is equipped with Mass airflow sensor, route the hose around the sensor. ****) Reinstall air filter cover.

We aint got no 1' on the 6.5 to snake to the turbo us MAF guys even less, post filter pre turbo is what I gather from this, also they had this disclaimer in small print

***This propane kit is intended to optimize the performance of your turbo-charged diesel engine. It is not recommended to operate a diesel engine at maximum power for extended periods. Improper use of propane injection may cause damage to the engine and/or void the manufacturer’s warranty coverage. As with any aftermarket performance product designed to increase torque and horsepower, the user and purchaser assumes all risks and liabilities associated with and resulting from the installation and use of this product. ****

Do a Google search on Diesel Propane Injection that is how I found this http://www.dieselperformanceproducts.com/install.html

Banks appears lukewarm on Propane http://www.bankspower.com/FAQs_highperform.cfm

Fred, it does have to be pre turbo. After the turbo,it would only hit one or two cylinders and you can imagine what would happen after a while. The turbo helps evenly distribute it.
You have SD's manifold ? Were you using it for the propane or just for the water and N20?

"Banks appears lukewarm on Propane" ??? Apparently they have never "researched" a Powershot system?http://www.dieselplace.com/forum/images/smilies/biggrin.gif

I'm sure when Banks built their record holding Diesel powered truck they looked at propane, nitrous and all other methods of getting more oomph, they are way smarter than I'll ever dream to be on this, I was just offering a different side of the coin, pros & cons to every choice, wasn't saying it doesn't work, but is it a good bang for buck mod with everthing else out there that might be done 1st, before going to propane, that's all. Got to have a good foundation for the house to be built upon, drugs/gas would be at end of my list just my .02 you probaly have a different POV, that's good.

Share and discuss sans attacking the messenger is what we strive for not always successful but we try.

Put it in before the turbo. I drilled and tapped the intake pipe. Check out my other posts for more info, or PM me.