I have a 89 IROC Z and it had the 350 TPI motor. well it is no longer in the car and im swapping to a 355 CARB motor. i took all the engine electrical out. engine harness and computer cuz i would like to keep things simple under the hood. im only 17. i would like to keep the stock tpi fans. how do i wire them up so theyl work? i was thinkin i could wire them up with a toggle switch but id hate to forget about it and burn up my motor. but please help me thanks

 

im thinking one of thes kits from summit will work or make your own..
http://store.summitracing.com/partde...5&autoview=sku

 

Thanks, but the only fan wiring thats in the car now is the wiring thats connected to the fan motor and goes to that big connector and the relay by the battery. so i guess u could say i just dis connected that big connector and thats it. do i need anyhting else to use that kit?

 

Manual switches are good as a bypass for at the track. Here is the correct way to wire it up from scratch.
1 See if the pass. side cyl. head has a port between the 6&8 spark plugs. This is for a factory style fan switch. If so...
2 Get a GM fan switch, Jet, Hypertech, Buick Grand National all come on at a lower temp than the factory 3rd gens. Make sure you got a pigtail connector with it.
3 Get a fan relay and the plug for it.
4 Get some 12 and 16 ga wire
5 A 20 amp inline fuse, and a 2.5 amp, same
Here is how this works. The relay has 4 pins. 2 are to ground, 2 are for power. One pair of those pins is the "coil". There is little to no current draw here, this is where you take 12v from your choice of source, run it through the 2.5 fuse (16 ga wire) and to one pin and the other pin goes to the fan switch. When the motor reaches temp, the fan switch closes, and rounds to the block, causing the relay to close.
Thus bringing us to the other 2 pins. This is where you use the 12 ga. wire from a 12v source, through the fuse, to a pin on the relay, go from the other pin to one pin on the fan, then from the other pin on the fan, to a ground.
Dont use teflon tape on the fan switch, it can insulate it from the block, use a sealant paste on it. This is the safest, cleanest, most reliable way to wire up a switch and it isnt that expensive.
If you like i got a quick diagram that can help you out.

 

One TPI fan is ran by a switch in the passenger side head, the other is ran by the computer. You should probably just by one of those kits with a nice beefy aftermarket fan that will run off of a temp switch in one of your heads. It'll be easy and all you need to do is route power.

 

well what fan could i use? i would like to just use the TPI dual fans tho, since it would save me money and they are already in the car and i wouldnt have to fab anything up. i just want to get them wired up and so they are reliable and dont just stop workin while driving and then burn my car up lol. but thanks for the replies so far guys

 

There's gonna be fabricating, one way or another. Either you do a bunch of custom wiring with some adapted sensors, or you fabricate a way to mount an aftermarket fan.

Some switches.

 

I just switched over to an electric fan and wired it up with a toggle switch. If you have your air dam in place, any time you're going over about 30 theres enough ambient airflow through the radiator it doesn't need the fan assisting it. If I start to get bogged down in traffic, I just glance at my temp gauge every couple minutes. Plus, you will be able to smell right away if you're getting too hot.