Propane injection

**leadfoot88lx** · 08-20-2003, 05:29 AM

Have been tryin to research the whole propane injection thing... I know it produces mad power on V8 or diesel engines... Could anyone check into the possibility of buffin up the internals of a 3g engine to withstand the compression propane will produce? I'm not too big on this stuff, but I try to find the info needed from other places

... I'll post a little of what i've found on propane injection...

110+ octane
-30F injection temp
280%+ power increase on diesel
230%+ power increase on V8
Can run all the time or just when you need the boost

I figured I've seen you guys try almost EVERYTHING else...figure maybe some of you might be interested in at least lookin into this... :smokin:

**NXRacer** · 08-20-2003, 07:55 AM

Back in the day, my dad had a bolt on kit for carb cars for propane. He told me it took like an hour or something to install and the car could run entirely on propane. He got it back in the 70's during the gas shortage. He never said how much power it gave. He still has a few leftover parts laying around.

**leadfoot88lx** · 08-20-2003, 09:51 AM

Well when I first saw the kit installed it was on a newer chevy 4x4 and it was stock with 184hp and after the propane was added ( injected through the intake box behind the filter of course ) it ran 417hp on the dyno... tank was mounted under the truck, filler nozzel next to the gas cap... the guy ended up puttin nitrous along with it and came out with 622hp on the dyno with a 40 of nos and the propane.... it was rather impressive... not to mention the change in the exhaust sound... sounded like somethin you'd hear at the drag strip, and I ain't talkin bout street legal either :p

**dXsquared** · 08-20-2003, 09:58 AM

my friend inherited a 1996 GMC C3500 crew cab duallie
he also got about 300 000 dolalrs when his grandparents died... anyway, he was thinkin of selling the slow ass Crewlie (crew cab duallie) but then he saw the ad's for BullyDog deisel performance... so he called them up, ordered every thing they made for his truck and installed it... now the thing has like 600 hp and like 1000 lb/ft of torque... sometimes for fun we hook up to parked cars and tow them around in parking lots... he had to get wider front and real wheels to install bigger tires cause he was roasting the stockers when he got on it hard off the line.. anyway,.. i know the propane injection helped his truck ALOT.. he can now beat me on a 0-60 mile run.. its embarassing...

Travis

**BootMachine** · 08-20-2003, 11:25 AM

Propane takes longer to burn than gasoline but you get a bigger boom SO...what you want to do is remove gasoline from the engine and burn propane with the air going in there!

You can't just bolt on some propane and start shooting it in there (I tried......nothing happened)...you need more air to burn with it.

SO...you can do a few things

- turbo for more air
- ram air intake
- remove some gasoline from the normal mixture and replace it with propane so it has some air to burn with

You need to be able to measure the air going IN your engine....measure the amt of gasoline going in......then do some really fast math (computer) to know how much air is left over....THEN..how much propane to mix with the air thats left.....advance the timing to allow for a longer burn and BINGO...you got some extra power..

The BEST would be to turbo for a lot of air and then cut the gasoline off and JUST burn propane!

Here is what I did....I took a tank of propane and shot some in my engine when I was driving...nothing...a little change in sound a so little power change I could not tell!

SO...took a leaf blower and duct taped it to my intake.....no propane I had a little more bottom end.

WITH the propane the car went like stink...then I heard knocking so I took the whole system off and never tried it again....Basically all I did was take a BBQ tank off my friends BBQ....cut the hole and fed it up intol the filter.....has him sitting in the passenger seat with the leaf blower out the window and the tank between his legs...got up to speed...fired up the leaf blower and turned on the propane and WOOHOO!

IMO...forget the propane....just buy a turbo!

**shepherd79** · 08-20-2003, 11:57 AM

i was about to say that propain is a fuel and you will need extra air to burn it right.
leafblower is not bad idea, except it would be good if you can connect the switch for propaine injection and leaf blower to the throttle. this way it will kick in when the throttle is in full open position.