jeff_blake

iTrader: (1)

i was looking to go to a fan controller set up, on my iroc, 305tpi stock set up.. would it work? or have any of you used it, or reccomend a fair priced one?
http://www.summitracing.com/parts/DER-16759/

camaronewbie

That one seems to be fine. Derale is a good brand. I was concerned about the 25amp total continuous draw limit, but if you are running stock fans it should be fine - stocks only draw about 11 amps continuous so even if you have dual fans it's under the rating.

You understand that this controller will run both fan together always right (if you have dual fans)? When the temp is reached, both fans will come on and run until the temp comes down. That is assuming you wire both fans to it. If you have duals you could leave one connected in factory config that would be ECM or head switch controlled.

The only way to have dual fans come on/off at different temps is to have a controller for each (unless someone makes a controller that will control dual fans as individual units).

jeff_blake

iTrader: (1)

ya bud, I have the stock single fan set up in it. I'm just trying to do optional ways for it, other then switch.

87350IROC

iTrader: (2)

Dakota Digital has a controller PAC-2700 that will control two fans independently. Very slick setup. It also uses a real engine mounted temperature sensor rather than the push in radiator probe. I use the old version, PAC-2000, and it works very well. However it is $100.

bradley23150

iTrader: (10)

I use this fan controller:

http://www.autozone.com/autozone/par...326162_69567_0_

It hasnt failed me yet, works great!

jeff_blake

iTrader: (1)

yeah brad, i got one from oreilly's where i work at down here. i have yet to hook it up due to the few storms rolling through and no garage. ill let ya know how it works. should i put the probe near the upper rad hose?

bradley23150

iTrader: (10)

I put mine near the top radiator hose, I think thats what the instructions entail, anyway. Here is a pic, its the only one I could find. I mounted the relay to the upper fan mount and the probe would be to the left of it on this picture:

jeff_blake

iTrader: (1)

yeah, that's where i was going to put mine, what 12v source did u use for the ignition. i was thinking cig lighter.. lol

bradley23150

iTrader: (10)

I ran a wire directly from the battery for my constant 12v source, and ran a wire from the Ign. port in the fuseblock for my keyed 12v source.

SanAntonio3

I got the same probe type harness from autozone, yet the fan doesnt come on. I hooked the ignition/12v source to the exciter switch to the alternator. The probe on mine is near the lower radiator hose.

one92rs

iTrader: (5)

it needs an ignition source other than the alternator but i suppose that will work. being mounted near the lower hose is the outlet and is way to cool. it needs to be mounted near the upper hose which is the inlet for a hotter temp.

SanAntonio3

cool. i'll try that.

bradley23150

iTrader: (10)

Make sure you also check the ground!!

Mine was giving me issues and I was getting frustrated with voltage spikes and stuff like that, and it turned out that I picked a bad spot to ground it, and the fan wouldnt turn on. You can check to make sure the relay is working by connecting the AC wire (should be green) to a positive battery source and the relay should click and the fan should turn on.

SanAntonio3

Fan turns on. Checked off to do list. Noticed a leak coming from the passanger side exhaust header. where it meets the exhaust pipe. Leaking coolant(orange). Had to put more coolant into radiator. Checked the oil to see if it had mixed. Dont think its mixed. suppose to be creamy color, like coffee and cream. Or so I heard. What do you guys think?

87350IROC

iTrader: (2)

It is probably leaking from somewhere else and dripping down the exhaust. Maybe the heater hoses that go into the heater core? Try to trace the leak up the engine.

jeff_blake

iTrader: (1)

yeah, i came across that same issuse, one of the hoses on the heater core wasnt completly on and slowly started dripping down. easy fix that was.

SanAntonio3

Have you guys ever heard of "Steel Seal". I got a blown head gasket that's causing the leak. I don't, I can't afford to have the head gaskets replaced the right way. I came across that product. Is it good? What can I use? Or do I have to do the more costly repair?

jeff_blake

iTrader: (1)

not to sure about steel seal, i have heard from numerous people that the "blue devil" brand head gasket sealant worked excellent. about $60 a bottle, available at your local oreilly's.

henryd3

iTrader: (128)

Hi, I'm thinking about giving up fighting with the fan switches and doing this myself, but was wondering. Isn't an easy way to hook this stuff up going over to the fan relay you no longer use and snip the wires before the relay pigtail? There you have the 12 volts through the fused link, and a switched on with ignition wire already there, and maybe you can even send power down your already existing wire also? Haven't gotten one, so I haven't looked at directions yet, but seemed like a good idea? Only thing that bugs me is how to stick something in the radiator without punching a leak in it. Probably also in directions, Doh!

87350IROC

iTrader: (2)

Some kits use a temperature sender screwed into the block. Much cleaner than the probe through the radiator in my opinion.

henryd3

iTrader: (128)

The sender screwed into the head is the ongoing nightmare I no longer care to participate in. Don't know if the location is bad, the senders are bad, or if my car is particularly bad. I'm done with it. Really kind of hoping for better results this way. Worth a try. Not much more than the cost of another sender

87350IROC

iTrader: (2)

Its not the fault of the location. Its simply that the stock system is extremely painful to get to work well. I use the Dakota fan controller. It has its own sender that gets screwed into the head and has its own controller for the fans. You can adjust the on and off temps for each fan separately. This system is solid. I have been using it for 2+ years with zero issues. The advantage is that it is totally stealth, very easy to changes temps if you want, and you don't have goofy probes through the radiator. You also don't have to do much hacking of the stock harness.

I went to the Dakota system because like you, I could never get the stock setup to work like I wanted it to. Now life is great again, and I never worry about fans anymore.

henryd3

iTrader: (128)

Cool, always better when life is great!

DJK90IrocZ

Hey 87350IROC,

You are using the Dakota fan setup on duals or single fan unit? Where can you get that switch and is it adjustable or fixed temps? Thanks....

87350IROC

iTrader: (2)

I'm using dual fans. The senders are sold by Dakota. The controller is what controls the turn on temps. No need to change hardware to change the temps.

jeff_blake

iTrader: (1)

how are you liking the dual fan set up? i know its better then the single. worth paying for?

DJK90IrocZ

Does anyone know where I can locate the relay for the secondary fan on a 90 IROCZ with the 5.7L and dual fan setup?