More specifically the SMIC.

 

Whenever i get a new ic I plan on it, but there aren't many fans that will fit the stock POS.

 

Sho Enuff .

 

Garfinkle has a fan on his IC which was made by K Wyen ( like the M2 mid size ) the fan has a switch to turn it on when needed .

 

Good idea, very good actually. I had never thought of that. You guys are an endless source of info.

 

Allow me to elaborate. "Sho Enuff" translates to "sure enough," which means "yes, indeed I do" .

I have a pair of 8 inch square fans bought from Summit Racing on the back of my M2 large. They drop intake temps at sub-highway speeds and really help combat heat soak. At the track I'll spray water into the duct when I'm in line and let the fans suck the water through the core.

Hope this helps--
Rich

 

I just got down tearing down an 89 Supra turbo they have a small set of dual electric fans that if you did so rengineering on the bracket you might get them to fit the stock or smic.

 

Suprised with the number of senior members they didn't refer to this link.. (3/4 the way down)

http://www.scuderiaciriani.com/rx7/intercoolers.html

I bought a set of the fans and haven't used them since I changed my IC. Plus finding accessory power source in the engine bay is a biatch. My understanding is that most everything is triggered off the cigarette lighter...

They blow like mad 85 cfm each for a 4" fan..

 

I have a blitz SMIC. And its funny cause just yesterday I got a hayden fan and hooked it to the side of my intercooler. There is no room behind it, so I have the fan attached to my airbox to blow air on the side, it should keep it from heatsoaking, which is the main thing. I got a switch today and the wiring is done. its just a matter of testing it when I get home. Its kinda cool, if it works I'll be happy.

 

I have a 10" fan on my M2 medium and it kicks ***!

 

I've got a fan on my ASP Medium IC:
http://www.maxcooper.com/rx7/how-to/ic_fan/index.html

The 10" High-Performance Perma-Cool fan flows 1250 CFM, which was the highest flowing fan I could find that would fit in there. I have it wired to the stock fan relays (2 of them, with diodes so they don't trigger each other), but I didn't do it quite right, so it only turns on with the AC. My mistake was connecting to the high-current lines, where one of them does not have enough voltage to turn on my IC fan relay when it is on. I think it would work fine if I tapped the radiator fan relay signal wires instead. I might do that, but I'll probably be hooking it up to my SPA water temp gauge instead, which has a programmable external alarm signal. I'll just set it low like 175F or something to keep it running when the engine gets slightly above my highway running temps.

Be careful with any fan choice, and expecially low-flow fans. They might do more harm than good by blocking flow at speed. If the normal flow is 800 CFM at some speed, and you are forcing all that air through two 85 CFM fans, it seems like it would just reduce flow. I am sure that you will get more than 85+85 CFM of flow, but it would probably be less than it would be without the fans on there.

-Max

 

Check out the Derale 14" 2 1/2 deep fan.
That's what I have for my M2 large IC.
It flows 1100 CFM. You can get it with or with out a thermostat from J.C. Whitney. The thermostat is adjustable from 150 deg. to 240 deg. and it costs $99.99 with, $75.99 with out the thermostat.

 

imo - it would be hard to achieve more than 170 cfm given the surface area of the stock duct at a speed less than 80mph on the stock IC... And one doesn't stay at 80 too long unless highway driving.

And 170 cfm is certainly more than going 0 mph. That stock duct has what the surface area of maybe 2.5" by 5" -- to get 170cfm through just driving (must be an equation somewhere)...

We sure could use a flow engineer...

 

I have 2 Permacool fans on my large M2 (new core, same as the med core) that I turn on when I want and the Temp drops real good after the SMIC is heat soaked.
I don't use them at highway speeds, not needed.

 

Can we get some more pictures and maybe a little more in depth procedure? That way the rest of us might be able to go about it a little easier.

- Steiner

 

SPAL fan on my SMIC here...actuated from my fog light switch...

 

Check here for some more information and a couple of detailed pics:

http://www.scuderiaciriani.com/rx7/i...olers.html#FAN

 

Kento,

What size spal fan did you use for you SMIC and what SMIC are you using?

 

I have not had good experience with the IC fan unless the hood is open. If I close the hood the fan appears to circulate air around the outer periphery of the fan, meaning the hot under hood air is being pulled thru the core then back out thru the fan instead of fresh air through the duct. I believe that a fan shroud is really necessary to ensure only fresh air is pulled thru the IC when the hood is closed, just look at your stock radiator fans for an example.

Conversly, the fan works very well with hood open as the underhood air is not engine heat soaked with hood up. Works well to cool off the IC in the pits or on the dyno!

 

have you ever thought about using a fan off a motorcycle? i would think that it should work because they are so small. i was think about using one on my condesor since its not in front of the radiator any more. just waiting for summer to roll around to see if i need it.