Freestyle Cooling Intake Air Before Carburetors

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Krazysxirider

X
Location
Vicksburg, MI
This might have been covered before but couldn't find anything after searching. Wanted to get some input on an idea. My idea is run an additional cooling line from the pump to a coil in an airbox. The rapid flow of water through the copper coil would help make the intake charge more dense before entering the carburetors. Airbox could be composite and the coil would line the exterior. Two smaller coils may be more beneficial than one large one. Has anyone attempted this and would it be beneficial?

Concerns would be effective capability of coils to cool incoming air and the performance benefit, if any, for the slightly denser charge.
 
onlyFX-1

onlyFX-1

Jace Forest...BRAP!
Location
Lake Travis,Texas
Ive always thought of having a cool can packed with dry ice that your fuel would travle thru before hitting the carbs. We use to run them on our circle track race cars
 
K

Krazysxirider

X
Location
Vicksburg, MI
waxhead said:
The theory is sound the practicabilty is not so easy.
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The hardest part would be making the copper or aluminum tubes into coils. Airbox wouldn't be hard to make. It is a lot of work to have questionable net gain. It would have the same application as an intercooler in a turbo application but flow would be as fast as possible to keep coil temperature cold. Length would be a big factor also. Wish I had more experience in fluid dynamics.

Always wanted to try something like this on a motorcycle but never had an abundance of cooling water to play with.
Ive always thought of having a cool can packed with dry ice that your fuel would travle thru before hitting the carbs. We use to run them on our circle track race cars
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Always thought warmer fuel atomized better? Were there noticeable gains from cooling fuel on your cars?
 
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Hihi962

Hihi962

Location
Mid A.B and S.K mostly
I think this would only make sense if you were compressing your air. They already have these divices for hopped up engines with blowers or turbos, they are called "super chillers" cost a fortune. But as with any compressed air, it gets hotter, naturally aspirated doesnt have too much of a temp difference going in.
we all know colder air is more dense, but to even make a fraction of a difference, you'd have to drop the temperature by like 60deg for it to even be noticable in a naturally asp. engine.
Dry ice would do it, and look awesome in the process! Just imagine all the fog pouring out when you pull your hood off! They,d think its either on fire or has a nos leak.

oh yea, and fuel is the same, gets more dense as it cools, has more punch to it, also adds to cooling your charged air.
 
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M

Mentzel

Location
Ak
You won't get enough cooling from the source water to make a difference, even in very cold water.

Some have found power, cooling crank cases using the same theory though. Remove heat from case plenum vs adding cooling to intake charge. Also a liquid cooled mag cover would be neat. Put your hand on that thing sometime!
 
S

Schmidty721

someone turf my rails
Location
WI
Just make the whole air intake system seal all the way up the handle pole and make that into a giant heat exchanger lol.
The biggest issue on skis is the hot & humid conditions under the hood. Pulling air directly into the engine without pulling from the bilge area could possibly net some gains, but the water-cooled airbox will not have any effect on IATs if you are running something similar to a standard induction setup.

or.... there is always NOS
 
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just joe

just joe

Site Supporter
Location
NorCal
The temperature delta between the water and your intake air, combined with a short dwell time, would mean almost no measurable improvement in intake air temps.

Not to sound too negative, as wax said the theory is legit.

We tried to use refrigerant coils in a car to do the same, and had little to no effect even though we could get well below zero refrigerant temps. It works decent on boosted motors since the air charge temp is very high. But in the end our experiment didn't pan out as the power loss to spin the A/C compressor was greater than the gain from lower air temps.
 
cudaben

cudaben

Location
V-town
I think I will have to disagree with most on this one.
OP= if you were able to create an air box, that the majority of the air (going to the carb) would contact the coils i think you would notice a difference once the engine warms up.
I havent tested the engine compartment temp, but with the engine running, and the exhaust there coupled with no cooling air flow, i would guess the ambient air temp inside gets pretty dang hot.
so a 100 degree intake air temp, passing by coils circulating 65 degree water, id be willing to be there would be a noticeable difference in response.
 
K

Krazysxirider

X
Location
Vicksburg, MI
cudaben said:
I think I will have to disagree with most on this one.
OP= if you were able to create an air box, that the majority of the air (going to the carb) would contact the coils i think you would notice a difference once the engine warms up.
I havent tested the engine compartment temp, but with the engine running, and the exhaust there coupled with no cooling air flow, i would guess the ambient air temp inside gets pretty dang hot.
so a 100 degree intake air temp, passing by coils circulating 65 degree water, id be willing to be there would be a noticeable difference in response.
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Yeah I had the same thoughts. Might be worth grabbing a digital thermometer and placing it by the carb to see if engine compartment temperature has much effect on incoming air. I'm curious but doubt this will see much more time.
 
Quinc

Quinc

Buy a Superjet
Location
California
Enough dry ice to make a difference would choke your engine. Dry ice = co2. It would have the same effect as an exhaust leak.
 
Quinc

Quinc

Buy a Superjet
Location
California
You need to hook up nitrous!
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