Jer82Z28

Who here thinks super cooled gasoline injected into the engine would provide more power?

My fuel line comes very close to the header and after a 1/4mile pass you can see the fuel starting to boil..
so that has me considering plans to cool down my fuel lines somehow. I'm wondering if supercooling the fuel somehow would be worth a few hp...
any thoughts?

ronterry

What's up man...

I would insulate them first, and than consider a cool can setup.

I used Thermo-Tek tubing around the fuel lines. I even use it on the radiator hoses.

If your goal is drag racing, than I would run a cool can.

Ron

Jer82Z28

Hey ron!
How does the cool can work?
I have a few ideas along the same lines that I was going to home build..
whats the optimal temp for fuel atomization?

ronterry

The only setups I've seen are not technical at all. Just an insulated aluminum can with fuel line coiled to the inside wall. Pour some ice in the center, and your set. Don't forget to punch a hole in the bottom to let the water run out.

No engineering degree here, so I couldn't tell you about the perfect absolute best atomization temperature. But depending on the temp of the fuel before it gets to the can, the only way to adjust the amount of temp decrease would be the amount of exposure (length of hose & size of hose) in the can to the ice.

I've also seen air cooled units, kind of like intercoolers, but useless when the car is sitting & waiting for run.

Ron

Mr_Happy

NHRA outlawed cool cans so its not usable at the track, used to be a common thing until fuel systems with return lines became common which keep fuel cool by circulating fuel.

Jer82Z28

any particular reason why?

LOL ron! thats exactly what I had in mind!
and here I thought i was onto something original
:sillylol:

I'll build one anyway and hide it under my air cleaner if i have to.

Ace_Murdock

yeah but once you get to stoich your good. denser fuel wont really help. possibly only a rich condition

Mr_Happy

I think fuel lines coiled in the cool can tended to breach during a wreck. but thats my impression.

Jer82Z28

The way I see it though.. colder gas entering a hot motor will cause the fuel to want to expand... vapourized gas being heated should result in a more efficient fuel atomization..

If anything though, a cool can will do wonders for keeping my car consistant run after run.

five7kid

iTrader: (14)

Anybody have the page & section # from the NHRA rule book that outlaws cool cans? I've had mine on the '57 since August, it was inspected for the Division V Summit Finals and nothing was said.

I posted about cool cans on the carb board earlier this summer. I made mine from a 3# coffee can with aluminum 3/8" fuel line coiled inside. I soldered/RTV'd a radiator petcock to the bottom for draining purposes. No insulation on the can itself. It sweats, but doesn't leak.

Comes in especially handy when getting to the later rounds without much cooldown time. I also recently covered the lines after the cool can with Thermo Sleeve, that helped a big bunch.

Mr_Happy

Guess it is legal I downloaded the rule book.

Jer82Z28

five7... did you notice a mph difference with the cooler gas?
have you experimented with that?

five7kid

iTrader: (14)

No. I'm using it for the sake of consistency.

Last race I jetted down the primaries and jetted up the secondaries. Drove better on the freeway going to the track, and ran great at the track.

In theory, warmer gasoline should vaporize more easily, promoting more complete combustion in the cylinder. Cooler fuel will require warmer air to vaporize it, and we all know what happens with warmer air. But, boiling fuel in the float bowls is no good at all.

AlkyIROC

2002 rulebook. General regulations 1:5 page 194

Cool cans in full-bodied cars must be mounted a minimum of 6 inches forward of the firewall.

Page 195 (fuel/air) (brief and not exactly quoted)

Any method of artificially cooling or heating is permitted.

Even with all the cars I see at the track when I go racing I don't think I've seen anyone using a cool can yet. A class car or stock/superstock racer that's trying to squeeze every last bit of power out of the engine may want to use a cool can but your average bracket racer won't bother.

If you insulate your fuel lines, keep them away from the exhaust system and use a carb plate you shouldn't be boiling the fuel anyway.