I caught the tail end of HotRod TV yesterday. They had a Chevelle with Liquid Propane Injection.

They said as it goes through a tube it expands big time at a really fast rate and practically creates 3-5 pounds of 'boost'??

I couldn't even afford the custom fabbed and 5 chambered propane tank in the car but I was just curious if anyone has ever tried this.

If it's the one I'm thinking about, the Mothers Chevelle runs on Propane. It was built as an "alternative fuel" vehicle. It isn't using Propane as a power adder like one would with nitrous.

Man,,, I was wondering about the same thing regarding propane the other day. What hotrod tv show was it?

Ive got a propane regulator that ran a BBF engine sitting in the garage....

I've got some parts to convert a /6 engine saved up. Forklifts used propane alot, pretty simple stuff to work with, and yes the regulator does drop the high tank pressure down to a useable level, and it varies dependingon the application, but it doesnt increase incoming air pressure, least not that I have ever seen.

Yes it's the Mothers propane chevelle but they converted it to liquid propane injection and it made more power the way they had it setup. I know it's not a power adder but the way they were talking it almost acted like boost.

DT, I'm not sure what episode it was, it was on sometime yesterday. I'll have to watch for it again. They said it was cheap to run, made more power, and was better for the environment.

DT, I just noticed you already have a thread about propane on the 4th page. I'd like to say great minds think alike but I don't have a great mind.

If I remember correctly, part of the added power is because propane has a reasonably high octane rating and you can crank up the timing.

I didnt see the show but for propane to act like boost it would have to be injected as a liquid under pressure. Which is what they obviously were using. Vs the other way propane is normally used in forklifts and such consumed as a Vapor

Propane is in liquid form under pressure. Once relesed it expands x%

Propane in Vapor form has never been a good high performance fuel.

But Liquid propane injection, thats something to keep an eye on, mike

Liquid propane vaporizes at (I think) -43 degrees so you get the cooling charge effect, not boost.
I seen the Trucks TV show where they did a liquid propane injection system on a truck. I though it was a kit from Rousch racing or something like that, but I checked the cost and it was around $10,000! for the conversion

I saw that Hot Rod TV show yesterday. The guy from Mothers said the 3-5 lbs. of boost came from liquid propane that expands 400% after injection. He didn't say, but wouldn't it have to be injected directly into the combustion chamber?

Think about the mass of liquid propane injected in ratio to the air mass, I can't see any way that amount of liqid propane expanding will create a 3-5 psi boost effect, should do the math on it I suppose.

The newer Schwan's food delivery trucks have multipoint sequential liquid propane injection, that technology is owned by a company that is owned by Schwan's. On the engine it looks very very similar to a factory gasoline EFI system.

http://www.bi-phase.com/index.html

I'm A gas man by trade and have thought about propane injection for years. I have always thought that it whould be a great enrichment fuel for NOS. All you would have to do is get a fork lift or flore buffer tank(they come in aluminum and have liquid ports), And a solinoid. You no longer need a exotic fuel system. You would have to figure out the orifice size. Propane works like NO it sets in the tank as liquid and makes its own pressure. When With a boiling point of -44 it would add to the cooling effect of the nitous. I'm not sure that you can inject enought into the cylinder without nitrous to achieve those boost numbers, but the cooling effect (44 degrees below zero) could be exploited for some exta HP. All we need now is a willing test subject

Ask the diesel truck guy's,, they have been using LPG for year's as an enhancement.

Does anyone remember the.... I think it was a hemi challenger or cuda that was white or a really light colored tan.

That was propane powered.

It was tubbed and ran 9's or 10's on the stuff way back in the late 80's or early 90's at Norwalk

It was a really cool car

Here in the Netherlands about 50%-70% of the American cars (oldtimers and new) use propane for feul, also lots of car with bigger gas engines use it. With using a regulater and a "mixer" on top of the carb is the easyest and cheapest but with LPI (liquid propane injection) you got as much or even more power then on normal gas.
but a LPI system is computer controlled and therefore difficult and expensiver on old carburated engines.

for example, higher octane pump-gas for our older engines is around $7.60 for a gallon and propane around $2.66 a gallon so you understand that it is populair here to convert to propane