yusoslo

anyone running this setup



My friend ran over my stock rad when I was painting the engine bay, so I guess its time for a new one.

Thinking koyo on ebay 225bucks
I am also putting on a fmic in the future custom made but similiar to the npr style, rear mounts on the end tanks.

Should I keep the stocker fan or get the taurus?

vipers

iTrader: (8)

well....in my opinion...cooling is the #1 priority on a rotary motor....so i wouldnt go cheap...... either stick w/ the stock fan, or go w/ the black magic fan......to my knowledge they are the best fans out there for rotaries (although i could be wrong)....... never heard of using a taurus fan.......... but the koyo radiator is definently a good choice!

RX-Heven

iTrader: (1)

Those Koyo's are decent. You wont be able to do any open track events with it and your fmic, but you will be fine for day to day spirited driving. Stock fan and shroud are quite effective. Make sure you keep the undertray on as well.
Black Magic fans are decent too but there are many other choices.
The best out there has got to be the vintage air 3800 cfm monster fan. Pulls more air than any other and is quiet also. Not cheap though.

Turbo23

iTrader: (4)

he should be able to do some track events, just make sure you have some good ducting, and a good efan, like RX-Heven said, the vintage air fan or black magic makes a new fan that pulls 3800cfm as well. Make sure your cooling system is operating correctly as well

Wankel7

Good setup....

But I would stick with teh stock fan.

James

Wankel7

do you speak frome experience?

What kinda water / oil temps did you run with this setup?

James

NZConvertible

How is a fan going to make any difference on the track?

RX-Heven

iTrader: (1)

Yes.
Too hot and too hot.

myfc3s

iTrader: (2)

I use the koyo rad, and a greddy fmic w/stock clutch fan. With a T51s turbo on a dyno. The temps stayed at 185-190 degrees. Daily driven under 190degress on a very hott day here at Cali.

yusoslo

this is a track car with only weekend street driving.

I am planning 8-10 auto-'s
3-4 large track events VIR SUmmit point
and drifting when ever I have some tires around

Rx heaven you are making it seem like I will not be able to cool the car....what do you suggest then? I have to run a FMIC for power reasons and I can stick with the stock fan if need be, but if there is a "magic" radiator that will cool this motor let me know.

scathcart

The VA fan is pretty nice, but the zirgo 16" 3985 CFM fan is a better option at a exactly half the price.
($288 for the VA, $141 for the Zirgo).
http://www.zirgo.com/detail.lasso?itemid=ZFU16

I have used both... the zirgo is the best performer out there, and is really well built. Its also the most nicely priced. They offer some decent controllers, too, for those who do not have a standalone.
The one I installed pulled just under 9 amps.

yusoslo

the zigiro in the link is 299.

But thanks for the info

scathcart

That's being sold directly from the manufacturer.

Ebay has them for $150-$190, brand new.
The local retailer for them here sells them for $169 cdn. That's $141 USD. Their "sale" price is the same price all the time... not really a sale.

http://www.streamlinerods.com/catego...6%7D&catid=179
$189.

RX-Heven

iTrader: (1)

I haven't used one of the other fans so I won't comment on it. More air for less money does sound good. Makes me wonder about the quality of it though. Also, does it come with a shroud? The vintage air unit has a plethora of choices of plastic shrouds that can be made to fit like a factory install. Of course you may be able to source the shroud from Vintage Air and use the fan you suggested.
However, in all honesty, a better fan is not going to do anyting for you on the track whatsoever.

The Koyo radiator you want will barely provide enough cooling for 20-30 minute track seesions with a fmic in anything over ~80 degrees. This of course also depends on how much boost and power you end up running. More power and boost = more heat.
It could provide enough cooling for a worry free session under most conditions if it has some help. More airflow through the front end and make sure it is well sealed. If at all possible, provide a sealed fresh air source below, above or aound the sides of the fmic directly to the radiator. That way you are minimizing the amount of preheated air through the radiator.
Also, if you have a TII hood, you may want to think of ditching it or even better converting the scoop into a vent. What happens is with a fmic and the TII scoop, you almost pressurize the engine bay, not literally, but enough to prevent adequate airflow through the radiator. An NA hood works better that a stock TII hood and an NA hood raised in the rear works even better. Of course you could also go with a hood such as mine.

ilike2eatricers

I <3 the stock clutch fan

Turbo23

iTrader: (4)

Because if your running high rpms, your temps will rise, you want them to stay steady with little variance in temps. A good efan will pull the heat quick, and keep your car cooler. On a track this will defiantly come into effect, since you are going to be beating the living crap outta the car.

scathcart

I agree. A dedicated track car should not need any fan.

I can snap some pics of the 3950 CFM zirgo. It does not come with a shroud, but installed as is has no problem keeping the oil/water temps at 165/170 degrees relatively.
As for quality: its an autoloc product. They make the shaved door handle kits all the hot rodders rave about. The entire fan is made in china, and the motor is replacable for a very reasonable price. The entire unit is plastic.

Turbo23

iTrader: (4)

i was speaking more of a street/track car. A track car souldnt have one, but a small one wouldnt hurt

NZConvertible

Wrong. At high speed a fan spinning at full speed actually restricts airflow. If your engine gets so hot on the track that the fan is triggered, your cooling system isn't sufficient and the fan won't help that.

Aaron Cake

iTrader: (1)

FWIW, I have seen this exact setup (Koyo, Greddy FMIC and Black Magic Fan) result in drastically high oil temps on the street. If you are doing this, you must install extra ducting to the oil cooler, and perhaps raise it up slightly to get it into the airflow more. Undertray is a must.

Turbo23

iTrader: (4)

depends on the type of racing and track. As well as ducting

yusoslo

Ok I am going throught the NASA HPDE school next summer. I will drive it on the streets on the weekends for fun.

I have the stock plastic undertray, but was considering making a custom sheetmetal one that wont bow under high speeds, I am also making my own custom upper rad support cover to help that out.

I just have the feeling that there is no real answer for my problems, not every rx-7 is overheating on the track.

I have heard of drilling holes (4) on the side of the thermostat flange to help with cooling flow.

I havent bought a rad yet so I am open to new ideas, I thing the stock fan and shroud is a cheap safe bet for now.

RX-Heven

iTrader: (1)

Quit while you're only a little behind....

NZConvertable is exaclty right.

Turbo23

iTrader: (4)

it does depend on the type off racing, drifting...your gonna need a fan, autox...your gonna need a fan, even some small road courses. Most 7s Ive seen always have a fan.

NZConvertible

Of course all street cars need a fan, but you've totally missed the point. You do not need any fan while you're driving at speed on a track. You only need a fan for when you're not moving quickly enough to push the necessary amount of air though the radiator. You implied a good e-fan was needed for track events. Any e-fan that works well on the street is more than sufficient for the track.

And I'm talking about real track racing, not drifting...