Youll need a NOS bottle warmer for the propane tank with 85* thermostat. I was wondering if a Co2 bottle would work? They make anywhere from 2.5 oz to 2.5 lb bottles.. seems like they should work, as long as they could be filled with a bigger tank.

 

From what I have read the ideal propane pressure will be 140-160#. You can use a n2o solenoid or some fuel solenoids, but they must be able to handle this pressure.

 

if you run the bottle upside down you should be fine with a fuel solenoid. right side up you will prob. need a n20 noid.

dynotune sells a bottle heater that is fully adjustable, i would say that would be the ideal one, and cheap too!

 

The pressure will not vary depending on whether you run the tank upside down or not. As stated above, the noid needs to be able to handle your working pressure.

Also, regular propane tanks are designed to be upright. The OPD valve has a float stopper in there to keep from over filling the tanks. If you flip the tank upside down, this float is going to shut off fuel flow. So you'll need to take your tank apart and modify it so this doesnt happen.

 

I like safety devices so I will run it right side up. What about bottle bracket...are there any that are wide enough to fit a 20lb propane tank?

 

I was always with the understanding with the bottle right side up you had to have more pressure in it because it was in gas form. thats why i ran mine upside down, so i could keep it at around 60 psi instead of 100+ ?

 

For the heck of it i thought i would post my dyno sheet from when i was doing the two stage (dry kit, and wet propane kit) nitrous kit.

The motor is all stock internals execpt the tr224 cam. It still has stock heads. At the time the bolt ons consisted of LS6 intake, and mac mid-lenght headers, and lid + K&N. No underdrive pulley or other.

anyway here is the dyno sheet

 

Nice looking dyno. What rpm were you 1/2 stages comming in? What size were they? I am looking at running a dry/wet and possibly using propane.

 

funny you ask that. i had them BOTH coming in at 3000 and shutting off at 6200. (sorry i cut off the rpm's on the dyno sheet making it smaller) peak power was at 5700.

as far as sizes go. I had a 100 dry and a 150 wet

the plan was to get a 2-stage window swith but then i just decided to go turbo

 

Pressure in a container is dependant on temperature. Think of it in terms of your old nitrous bottle. It really didnt matter which way the bottle was mounted. You always used the heater to get your desired pressure. The only thing you were changing was the volume of fuel you were feeding. With propane, every 1part liquid=270parts vapor. Liquid form is the way to go if you can get it to work consistently. The cooling properties coupled with its octane makes it pretty advantagous. Its too bad nobody has taken the time to market a useable conversion kit for nitrous.

 

okay i see what you are saying now. I was meaning you don't need as much pressure if the bottle is upside down to get the right mix. I understand it doesn't change the pressure either way. my bad

 

I'll see if I can get my jet chart up again.
Robert

 

Some questions.
1. Do you still have to retard timing using nitrous/propane?
2. Will you gain more power using nitrous/propane vs nitrous/ gas using same nitrous jet?
3. Can propane be used by it as dry kit, if so do you have to add more fuel?

 

Robert

 

3. Is a no. It is just fuel so if you sprayed it in alone you would just be running real rich.

 

Correct, I guess I read it a little wrong.
Robert

 

I haven't really seen this touched on much yet.
NHRA rules wise, I am guessing they would have a real problem with propane, no?
My local tracks are pretty lax on the rules so I do not see it being a problem here, but I was wondering about going somewhere else. Like to an event where they stick tighter to the rules and check everything.

 

Can we get the jet chart back up... PLEASE...........

 

Would methanol/alcohol be cheaper and easier, yet yield the same results as propane? I do know that methanol has a better cooling effect than propane and you can add denatured alky to richen some windshield washer fluid, which is 10% methanol from what I understand.

 

I will look again tonight, I have my notes stashed somewhere. if ya don't see it soon, give me a reminder.
Robert