I have the greddy SMIC and I have been looking to make a duct for it. I was working when I came across an idea. I have these small fans that my dad uses on his CNC machines to keep the motherboards etc... cool.

So I tried them out connected them to the battery and placed them infront of intercooler and they blow TONS of air. I was actually surprise how good they are, they blow as much as a household fan and are about 4x4 inches. I was thinking using a duct to get air from the nose of the car then placing the fan at the end of the duct right infront of the intercooler. The fan sucks up a lot of air plus with the air comign through the nose would be a lot of air.

I was wondering if anyone can think of any negative effects? They might take up a little extra energy because they would be constantly running nonstop until car is turned on..but at same time seems like a good idea. Seeing how intercooler gets no air during traffic or stopped. The fan would actually provide air will stopped. Well let me know if you think whether or not its a good idea.

I don't have them with me right now to tell you guys the rpm's and how much electricity they use. But do you think it would cause a big lost of power or would the positive outwiegh the negative?

 

I'll post pics soon to give you an idea were it would be placed and what they look like.

 

I am not a CFM guy but, I think the difference in moving air and forcing air through something is different. I may be wrong. The fans might not improve the performance that much if you can't push the air through the intercooler. I think Howard Coleman did something on putting the fans behind the intercooler to drawn air through. Then you have the heatsoak and air exiting problems. Anyone care to elaborate?

 

It's best to use a fan to pull air through the core rather than push. The air flowing to the intercooler at speed will be greater than the fan can deliver.

 

Exactly. Don't mount the fan in front of the IC.

 

http://www.maxcooper.com/rx7/how-to/ic_fan/index.html

 

Alright so i'll mount them on the back of the intercooler, but is there any other effect electrical wise...or power wise. I don't see that many people doing this mod just wondering why.

 

I have a 12" permacool puller on my M2 large. I wired it so it's on all the time the ignition is on, I'm thinking about using some kind of switch or temp sensor

 

Look for a CFM rating on the fans. I bet it is low (no matter how much air it seemed like they were blowing). For the sake of comparison, that 10" Perma-Cool fan I put on my old IC flows 1250 CFM. And it really didn't help as much as I was hoping. It was good for dyno tuning, but with the car moving the fan really didn't help. A few other downsides are that fans make noise and add electrical load (not so great with a small battery).

-Max

 

and they look stupid as hell

 

The restriction at the Greddy SMIC lower inlet is more significant than heat soak issues. The cast elbo is too thick. Have it carefully ported to a minimum wall thickness of 3/16".

Dual 4" computer fans have beed done on this IC, with minimal results.

 

So would this be benifitial at all to go through the trouble? I understand that it cant help that much while the car is in motion but in slow moving traffic and when the car is parked cooling down wouldnt this help by cooling down air temps to speed up the engine cool down time?

 

Intercooler fans are useless unless you spend all your time with the car parked on the dyno.

 

In slow moving traffic (no power demand on engine) and when the car is parked (no power demand on engine) it doesn't matter what the temps are. No sense in it.

Listen to Max. You could blow hard through a straw and make what appears to be a strong gust of air yet the CFM is zilch.

You don't want air velocity, you want air mass.

 

Ok, i got it. Put a leafblower behind it. LMAO. The fans are a good idea but you have to make it efficient.

 

Where would the run-off water go? I wouldn't want water pouring on the ground. And for those who drag race, you will be asked to leave the strip.

 

The goal of an intercooler sprayer isn't to make the intercooler wet, it's to lower the temp of the air before it passes through the intercooler. A true sprayer uses nozzles that atomize the water into tiny droplets that evaporate very quickly. Evaporation makes the temp lower (spray some alcohol on your hand. It gets cold).

A proper intercooler sprayer wouldn't make any puddles at all because all the water would evaporate before it could even reach the ground. The key is the nozzle used.

The goal of water injection in an engine is the same.

 

were we can found this spray?
Also I think that is better to install 2 fans to take out th hot air from the core.
Good place maybe is left and right from firewall to blow out the air from ventilation on fenders and that is usefull only when the car is on traffic when it runs I dont think that help

 

SPAL 10" High Performance Fan - Pull Version SKU # 30102057.
http://www.spal-usa.com/fans/automat.../2057-2058.pdf
1070 CFM and 10 amp draw at 13V. I run a fused 30 AMP and 10 ga wire straight off the battery. The Blue LED button controls it.









So far it seems to be very useful on the dyno & at the dragstrip to cool in the staging lanes. It also works OK to get the core temp down if you're stuck in traffic after hot restarts. At anything over 35 mph I'm sure to turn it off as its probably doing more harm than good while on.

 

if you get a gain in your aplication using a fan then use it, if you spend most of your time in trafic or at low speed a fan should help, but if you use your car at speed the fan may reduce the amount of air that can pass through the cooler.
An easy way to set up a "BUG SPRAYER" to the intercooler is to use your head light washer plumbing and try some irrigation fittings from a general hardware store.

~Ian.

 

well what about this guys, would sealing up all the areas that air can escape work, exp.
put a flash light under the car and look past the engine down to the floor if you can see light, air is escaping, i have a 8in permacool fan with my ARC race spec IC, and ARC cold air box, and my temps are very low.b

 

just run water injection.

 

This may be a dumb question but would putting a fan on the back of a FMIC help pull cool air through to the radiator, provided there is enough room to get a fan on the FIMIC??

 

Probably not.