How does propane cool the intake charge?

[blackbuick87]

I know how alcohol and water absorb heat and cool the charge, but if someone can enlighten me as to how propane does it I would appreciate it. I am having a hard time understanding how a gas can lower combustion temps. Is it due to a different rate of combustion?

 

[TurboBuickSix]

I read here it is because it comes out of the tank at -60 degrees.Anyone care to clarify this for the knowledge hungry?

 

[smokinHawk]

When the propane is released from a presurrized state it goes through a phaze chane. For a phaze change to happen it requires energy or heat, thus extracting heat from the air, which in turn cools the surronding air.

 

[bruce]

The propane is at room temp., plus or minus, the discharge air from the turbo is much hotter, even after the intercooler.

One of the biggies is that it helps to reduce the number of leans spots in the combustion chamber. While the rage in port and head design is high turbulence chamber design, propane accomplices about the same thing. Also, has a much higher autoignition temp., yada yada, etc, etc.

 

[TT/Ameasap]

How is propane at room temp. Plus or minus It comes out colder than heck on a forktruck. A while ago, I almost froze my hand solid

Thanks,
Bo

 

[darb]

From my research, propane does not come out at room temp. Far from it actually. Try -40 degrees or colder. There you have your answer to how it cools. -40 with definitely do the trick.

Brad

 

[bruce]

Originally posted by TT/Ameasap
How is propane at room temp. Plus or minus It comes out colder than heck on a forktruck. A while ago, I almost froze my hand solid

The point of expansion is at the solenoid, if I'm not mistaken. The Nozzle might get cool, but you'd have to have a real large volume for that to get really cold. I guess it would vary by degree of useage. While in liquid form in the tank it's also at ambient temp., it's just as it changes to a gas, that it gets cold.

 

[Vader 87]

Anybody know what the octane of propane is? Is it higher than alcohol?

 

[bruce]

If you google using MSDS and the chemical name you can read up on all the details of the various chemicals and gases.

It's not just about octane. And just not about chemical makeup. What it contributes to the reaction in the chamber is the bottom line that matters.

 

[BoostedBug]

I can see it now....Someone places the bottle Inverted to draw liquid. BOOM!

If you want to run a liquid into a motor NOS for example...

Problem witn NOS is that the farther away from the INtake port the better chance of puddling. This is where the gas turns back into a solid. We all know what this brings..at least us use to be Mustang owners.

I can see it might work out ok as we will have allot of air being pushed down to the heads via the turbo but I don't want to take a chance. I can run 26lbs of boost when the IC hoses are on so why try to push it more?

I think I am going to leave my setup as Jay designed it...Works to good without any headaches!

 

[blackbuick87]

Big difference between an N/A Viper and a turbo motor running 18:1 compression or higher