chilling race fuel?

[wannab]

does any know if the effects of chilling 102octane fuel to
-35degrees celcius could improve performance:confused:

[thebear]

Originally posted by wannab
does any know if the effects of chilling 102octane fuel to
-35degrees celcius could improve performance:confused:

Probably not. However, the increase in density would allow a fractional ammount of more energy to be carried.

[wannab]

thanx,i race in a standard production saloon car series where basically no mods are allowed,the car iuse believe it or not is a golf 1 160i (polo motor mp9)competion is extremely tight,and looking to try anything to squeeze any more power,any other suggestions?

[thebear]

Originally posted by wannab
thanx,i race in a standard production saloon car series where basically no mods are allowed,the car iuse believe it or not is a golf 1 160i (polo motor mp9)competion is extremely tight,and looking to try anything to squeeze any more power,any other suggestions?

Are "K & N" air filters allowed? :confused:

Any ability to play with the timing?

[wannab]

yes,i have one ,as for timing,played there already.please excuse me as this is my first time on a chat forum and can barely type, so it takes awhile.as for my mechanical knowledge "limited".however,back to my original question of cooling fuel to enhance perfoormance.do you think i would be wasting time pursuing the possible benefit?

[thebear]

Originally posted by wannab
yes,i have one ,as for timing,played there already.please excuse me as this is my first time on a chat forum and can barely type, so it takes awhile.as for my mechanical knowledge "limited".however,back to my original question of cooling fuel to enhance perfoormance.do you think i would be wasting time pursuing the possible benefit?

Yes.

You haven't stated what method you would use. Presumably you would pack the fuel containers in dry ice? Otherwise it would be a lot of money for the same gain that could be achieved with only a slight increase in talent.

[wannab]

the container is placed in a chiller almost submersed in glycol, according to manufacuturer would take approx 40mins
to cool 20litres to -35degrees c,as for talent always room for improvment,
any measurable benefits from magnetising fuel?

[thebear]

Originally posted by wannab
the container is placed in a chiller almost submersed in glycol, according to manufacuturer would take approx 40mins
to cool 20litres to -35degrees c,as for talent always room for improvment,
any measurable benefits from magnetising fuel?

Surely you jest? Magnets are useless.

[275 GTB-4]

Originally posted by thebear
Surely you jest? Magnets are useless.

Peter Brock invented a Polariser device with certain magical powers...why not try one of those?

[ChironWSC]

We cool our fuel for racing not to -35deg but in a freezer also run a fuel cooler on the car (just a small oil cooler). It does make a differance!!!

[1200Datto27]

Mazda Motorsport used cooled fuel in the early Bathurst 12 hour races, and found that they got an improvemtn in power and fuel economy from doing this. Mind you, this is in a turbocharged rotary, and the fuel would have had an intercooling function to assist in the power production. It also kept the engines tempretures more consistent over long (50~60 minutes) runs

[KC]

You would probably find more power increase by packing dry ice around your intake manifold to lower the temperature of your air charge. Colder air is more dense, packs more oxygen and more oxygen makes more power. Just watch your fuel mixture to avoid a too lean condition that might burn a piston. This is an old drag racing trick.

[shiny side up!]

As KC says, you get pretty decent results from cooling the air intake charge. But you should get real results from cooling your fuel, as well...

[wannab]

thanks to all,much appreciated.ill give feedback in+-3weeks after some dynos and next race.

[GolddustMini]

Originally posted by 275 GTB-4
Peter Brock invented a Polariser device with certain magical powers...why not try one of those?

my boss has tried these magnets when someone claimed they were the bets thing since sliced bread, with the salesperson stood next to him it made absolutely no difference what so ever, hmmmm


i use the magnets to hold the dart board to the metal door now...

[Heeltoe]

where is the point when the air/fuel is so cold that fuel vaporization is upset and causes uneven/slow burn and low hp ?

[MountainRunner]

There is always a limit. But it makes sense to be able to run more aggressive engine tune with cooled fuel as pre-ignition limit should be improved. Some production cars have run fuel coolers and drag races use them. Can't wait to hear the results.

[THR]

we used to chill it a bit in a bda, hillclimbing, seemed to always win, but not sure if thats cos of the feul!
didnt hurt anyway, and the thoery says u should get more bang.
aint a big problem when u used 3litres on a run! u can put it in the frigde.

[boyracer]

As MountainRunner hinted at, you can run more timing and that would help. More fuel also helps in taking the heat out of the piston and generally means you can run more ignition. If you chilled the fuel, as soon as it gets to that nice hot piston it'll quickly re-heat, but the energy taken to re-heat it comes out of the piston (but you put it back in next bang). I could see a gain, whether it would be worth the hassle....next question.

I know Team Subaru Australia were packing dry ice round the Intercooler for last years Rally Oz, reckoned it went pretty damn hard for the first 10kay before the ice run out, but sometimes that's all the edge you need.

Good luck.

[Oaksnaf]

In no scientist. But i wonder if this will help you

Chilling the fuel in the tank has some merit, but with the simple carburetors that karts use, maintaining that desired fuel/air ratio becomes extremely difficult if you begin to fiddle with the temperature of the incoming fuel. It's much more efficient to use fuel additives that have high heat of vaporization to cool the charge. All liquids absorb heat energy when they change from a liquid to a gaseous state, that's how the freon in a refrigerator works. When a liquid is vaporized, like your fuel going through the carb and into the air stream, it gets colder. That cools the air it mixes with and the resulting fuel/air charge gets denser. Neat, huh? Well, different liquids have different heats of vaporization. Alcohols have a substantially higher heat vaporization than gasoline (ever notice how cold it gets if you get some on your hand?), but other highly volatile options exist. In general, hydrocarbons with lower boiling points will have higher heats of vaporization.

taken from::
http://www.foxvalleykart.com/fuel1.html

[richard_sykes]

In this months race car engineer there is a "fuel cooling device".

www.barrygrant.com

[mark_l]

Some championship regs may not allow chilled fuel. It might say that it has to be stored at atmospheric pressure and temperature.

[dtype38]

Sorry, repeated an earlier post

[zefarelly]

the only chilling thing about race fuel ( for me) is the cost !