fan relay and wiring
 

just got my Griffin radiator with 2- 12" fans and need help with the relay and wiring . This is a 69 Camaro with a ls 2 I would like the computer to control them. what wires do I use for hi and low ? and where do I mount the relays . Thanks you

What harness are you running? Engine and vehicle?

Mount the relays close to your battery source. I like to mount them near the fans around the horn relay or junction on Chevy's.

Its a 69 Camaro with a ls2 (gto) harness is a after market with the normal deletes on ecm battery was relocated to the trunk

What brand engine harness or who put it together. Did it come with a relay block?

There should be a fan 1 and 2 wires from the PCM.

You can run a 10g wire from the starter BAT+ to a junction block or circuit breaker for the relays. Mount them up on the radiator support.

Here is one option. Not the lowest cost but gives you dual speed fans and an option of A/C control.

http://shop.bp-automotive.com/Univer...rness-1022.htm

Don

Pretty dang cheap if you ask me -- given what I pay for SPAL relays @ $34 a piece!

It is a good value. I bought one of these and it looks well made.

Don

well if your gonna roll the dollars might as well break out "the Player"! Or as Weld like to say the "da Playa"

http://www.entropyrad.com/wiring-harnesses.html

Everything that Uncle John needs.

Thanks you guys for all your help Entropy has a real nice LSX SET UP its plug and play no need to run wires all over. Ill buy that set up I guess ill sell the 2 New relay kits that came with my Griffin radiator. Any body interested. Again THANK YOU FOR ALL YOUR HELP!!!! THE PEOPLE HERE ARE GREAT

Thanks Vince!

Our harnesses and fan controllers really are sweet. Quite a few guys are running them on here, P-T, and Camaros.net

Thumbs up
For a sweet set up

Ayy...Thank you sir!

https://s.yimg.com/fz/api/res/1.2/AV...70/fonzy10.jpg

That looks like a very good fan controller. I am running a stock spec 195deg stat in in my dewitts rad-fan combo/lsx 6.0. in my early Corvette. That doesn't leave a lot of room for on and off. With my current sender the fan hits and stays on 'cuz the sender shuts off at 180. What temp does the stock ecm turn on the fan for a 6.0L? And what temp off? Do I need a controller that turns the fan on @ 200 and off at 196? I really like the 2 stage "on" idea too.
Thanks, Frank

You can adjust the turn on and off temps on the computer. Usually stock is just about 205 on 196 off. Something like that.

The PCM can control them if you like, or Entropy's set up is schweet. If you just need a harness and instructions, let me know and I'll send you some info and a harness if you need one.

Thanks cj's. I would like my ecm to control my fan. Is the info and harness something you sell? I don't see it on your site ... I'm am enjoying looking through your site. You can PM me if you like or reply here...
I guess entropy didn't see my question.

Same here. I would love for my gmpp kit to control my ecu. Seems like the Entropy fan kit is the way to go. Can anyone post the instructions for the lsx entropy fan kit?

Randy, the gmpp computers can control fans just fine. I don't think they are set up PWM from the factory. The last one I did ran a pair of Derale fans. Controlled one each and you can even set it up to kick both on when it controls them separately.

00fxd,
pm sent

You are right the ecu is not setup PWM from the factory. I guess its something that would be nice to have but not a must.

Randy,

It's really not a big deal. PWM is nice, yeah.. but fans turning on and off the good ol' standard way has been fine for me.. swap after swap after swap.

Some cars have such a large cooling system, we struggle to get them to even run at temp in the first place.. unless they're really beating on it. Autocross isn't that bad.. 60 seconds and the run is over..


Road race, time attack and road course? That could be 20 minutes to an hour. Some cars run multiple hours. That's when the BeezNeez of cooling systems might come into play.

Seems like the best way for me is to run the ecu wire to the outwore front headlight bulkhead for smooth wiring