you see them on the drag/hotrod scene now and then.
all this talk in other threads about return lines keeping your fuel cooler made me wonder if there wasn't something that we could do to help 'chill' our fuel to make more power, or to prevent vapor lock.
just throwin' it out there.
Interesting idea. It would be nice to cool the fuel before it goes to the injectors. How do the drag racers' ones work? Ice? Little radiators? I guess that could work if you had a fan blowing on it pretty hard.
The factory fuel pump is actually cooled by the fuel going through it (!!) I wonder how much the temp rises because of that and the pressure increase? I'd be surprised if it gets too much above ambient. Anyone know?
I thought about this as well, however most (all road racing that I have seen) race sanctioning bodies will not let you use one. At the drag strip I have seen the ones that look like a radiator and the ones the at are a coil in a bucket that you fill with ice.
QUOTE (Reiche @ Jan 25 2005, 02:43 AM) |
Ice? Little radiators? I'd be surprised if it gets too much above ambient. Anyone know? |
For many years Jaguar used a fuel cooler - the fuel line was plumbed into a small canister surrounding one of the air conditioning lines. Not really applicable for making more power (turn the AC off, stupid ) but interesting.
I run a return type fuel regulator on my carb setup. Keeps the fuel cool by the recirculation back to the tank, just like the stock system.
I could develop a thermoelectric fuel cooler if needed.
QUOTE (James Adams @ Jan 25 2005, 07:45 AM) |
For many years Jaguar used a fuel cooler - the fuel line was plumbed into a small canister surrounding one of the air conditioning lines. Not really applicable for making more power (turn the AC off, stupid ) but interesting. |
In colorado at altitude there is less cooling than at sea level.
ALOT of guys run fuel coolers in road racing out here.
I never finished my car (which blew up) but was briefly a part of a rotary SCCA spec-7 class out here.
the fuel cooler was absolutely Required on a hot rotary motor. NO one ran without.
I know of a colorado 3.6 914 with a front oil tank. He was having quite a bit of fuel problems and vapor lock. He believes it was because his front (hot) oil was pre-heating his fuel tank. He added a radiator fuel cooler in his front trunk. A small scoope under the floor pan picks up air and then exhausts back down the bottom after it exits his cooler.
stopped his fuel problems.
Years ago in SCCA, one of our competitors decided to use a cool can. Basically a coil inside a can filled with dry ice, mounted in the engine compartment. Great idea, but the venting of the can (Carbon Dioxide vapor) was to close to the intake of the carbs. On pre-grid, the fumes could be readily seen and when he went to start the car for the race....no go He was known thereafter as the "Ice Man".
QUOTE (brant @ Jan 25 2005, 07:52 AM) |
In colorado at altitude there is less cooling than at sea level. |
QUOTE (nebreitling @ Jan 24 2005, 11:23 PM) |
just throwin' it out there. |
QUOTE (SirAndy @ Jan 25 2005, 01:17 PM) | ||
dunno if one would need them on our cars. my carbs are *freezing* cold, after a 2 hour drive, they're too cold to touch. hurting your fingers cold. that should cool the gas enough before it gets sucked in ... Andy |
Ive relocated my pump not to the front but closer to the motor actually right on the motor cross bar. I live in fla typical 90deg days and no vapor lok. My pump is air cooled even when stuck in traffic. I moved it because it made too much noise. I stripped the encrusted smoking rusted heat exchangers off the headers then blocked the blower passages in the motor that pushed the air from the crank blower into them but when I mounted my pump on the motor bar it lined up with one of my plugged ports and I opened it up and it blasts my fuel pump with fresh air all the time it is running. Sounds a little wak but it works for me.
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