What's the fastest the ProPain kit is effective until?

[WakkoSS]

Someone I talked to said he couldn't run over 18#'s of boost in his 10 second GN with the kit, even with no nozzle at all. Drained so much propane that the bottle was super cold. I'm only in 12's so it doesn't pertain to me, but I'm really curious.

 

[TEST MY 6]

With two tuning sessions im up to 24lbs with settings all on the low-mid side (not maxing anything out), I have come to realize that more is not better. Also remember the more propane you pull from the bottle the faster and colder the bottle gets dropping your pressure .

 

[WakkoSS]

How fast does your car go?

 

[TEST MY 6]

12.88 street trim with some knock issues last year ,Less bigger intercooler and w/o propain on 18lbs boost havent been to the track with it yet this year YET

 

[JayC]

John Gonzalez went 11.0something @ 131 in his single turbo Supra with a version 1 kit about 2 years ago.

That was with a completely stock fuel system, which is pretty impressive for a Supra.

 

[WakkoSS]

That's pretty impressive all around. We get so used to hearing 11's on this board we forget how fast that really is.

Is a Supra fuel system poor?

 

[JayC]

As I understand it, the stock Surpa fuel system starts giving out in the high 11s. Im not Supra expert by any means, that's just what I have been told.

 

[GNVYUS 1]

Supra TT pump is a 260 LPH pump. 290 LPH hot wired, so I'd say that one has plenty of fuel. The single turbo might have a smaller pump.
http://www.roadraceengineering.com/fuelpumpflowrates.htm

Jay, will the bigger tanks fit in the car?
From what I have seen so far, they come in the 5 lber. So, if running out of propane is becoming a deterant for faster GN's not to run it, then I am sure getting the 10 lber or 15 would solve that issue if it will fit.

And, I heard about a twin nozzle set up possibly coming for the propane kits. This could of been wishful thinking by some users, but that would help, along with the bigger tank if possible.

 

[WakkoSS]

The only problem I would see with a dual nozzle would be the varying temperatures and therefore pressures from the expenditure of such a high volume of propane. Perhaps the larger tank would compensate for this? At the minimum, T off the larger tank and mount a habachi to the rear bumper.

 

[BXR SUPRA]

Stock fuel system is good till about 550rwhp. Some people have gotten more out of it though.

 

[TrboHead]

Would it be possible to run Two 5lbs tanks? This would slow the flow down by half at each tank. If two is good then more is better. How about running 4 5lbs tanks in the trunk. Plenty of room. Would this elliminate the pressure drop? Mmmm....

 

[Freedster]

Originally posted by TrboHead
Would it be possible to run Two 5lbs tanks? This would slow the flow down by half at each tank. If two is good then more is better. How about running 4 5lbs tanks in the trunk. Plenty of room. Would this elliminate the pressure drop? Mmmm....

Why yes, I learned all about the importance of multiple large tanks of "Nawwws" in "The fast and the furious".

Seriously though, I think you could get the same effect by just running one 10lb tank instead of two 5's. The chill is a matter of pressure loss in a given volume, so more gas in a larger area would have less drop and therefore less cooling, regardless of whether it was in one tank or two. You'd probably better ask a physicist about that, however.

I do know the tanks get cold:

"What follows is my story about a shed, a warm beer and a home made jet engine. "
http://asciimation.co.nz/beer/

Heating the bottles might work too, but I'd be real nervous about that.

- Freed

 

[tracer]

why nervous about heating the bottle? Nos heaters have thermostats to 90-95 degrees.

 

[motorhead]

It is definitely sounding that less is more when it comes to propane. Since it is such a heavy gas, with a sloooow burn rate, it lends one to think that adding just enough with suffice over too much.

I am still set on toooooo much.

 

[JayC]

You could run 2 5#'ers or a 10.. plumbing it would be the only issue.. and mounting it of course.

I wouldn't worry about heating it either as long as you have a reliable heater. We are still working on a automated heater that hopefully will be ready to go this summer.

 

[Mike Licht]

Jay,
What is the bottle pressure needed? I already have a closed loop heater design done. By the way I have now named you guys "propainiacs"
Mike Licht

 

[CraigT]

Originally posted by WakkoSS
Someone I talked to said he couldn't run over 18#'s of boost in his 10 second GN with the kit, even with no nozzle at all.

If you are talking about Mizzell's car, that thing has run no where near a 10 second pass!

 

[JayC]

I'd like to see somewhere in the neighborhood of 80-150 PSI. If you're using a pressure transducer for feedback, I'm a little leary of that sort of setup.

Give me a call when you have time, Mike. I'd like to hear more about what you've come up with. Maybe we can use your setup and discontinue working on ours.

 

[WakkoSS]

Re: Re: What's the fastest the ProPain kit is effective until?

Originally posted by CraigT
If you are talking about Mizzell's car, that thing has run no where near a 10 second pass!

Who is Mizzell?

 

[tracer]

Jay, how will your heater differ from the nos heaters?