Radiators?

[KPC67]

I actually placed an order with autorad yesterday. I was speaking with Karen and the way she spoke was 700 hp was no problem with the smaller core. She also said that I can control the fans with the engine computer and would not need their controller. Does anyone know how this is done? or is it just easier to go with theirs? it is $120 for the preset controller or $145 for the programable one.. fairly cheap if it is going to cause a headache not having one.

[Ron in SoCal]

Originally Posted by KPC67

I actually placed an order with autorad yesterday. I was speaking with Karen and the way she spoke was 700 hp was no problem with the smaller core. She also said that I can control the fans with the engine computer and would not need their controller. Does anyone know how this is done? or is it just easier to go with theirs? it is $120 for the preset controller or $145 for the programable one.. fairly cheap if it is going to cause a headache not having one.

Hey Kev - I bought the Autorad w the fan controller. As I understand it - and I could be wrong - the ECU does an on or off for both the fans. I will wire in-line the controller so it gets the the on signal from the ECU and the controller decides when to turn the second fan on/off. That's my plan anyway...

[KPC67]

Originally Posted by Ron in SoCal

Hey Kev - I bought the Autorad w the fan controller. As I understand it - and I could be wrong - the ECU does an on or off for both the fans. I will wire in-line the controller so it gets the the on signal from the ECU and the controller decides when to turn the second fan on/off. That's my plan anyway...

Ron,
I haven't the first clue about wiring so I will let you invent the wheel here...

[69znc]

Kev
I did not do the controller from AutoRad. I have mine fully controlled thru my ECM. THis includes temp they start. temp they stop even after shut down, coming on and off based on the AC and even turning the AC at times. one fan vs two fan at temps all is done thru my Electromotive ECM

It is not hard. and the actual wiring is less and more important integrated with these other variables which I like

[KPC67]

Originally Posted by 69znc

Kev
I did not do the controller from AutoRad. I have mine fully controlled thru my ECM. THis includes temp they start. temp they stop even after shut down, coming on and off based on the AC and even turning the AC at times. one fan vs two fan at temps all is done thru my Electromotive ECM

It is not hard. and the actual wiring is less and more important integrated with these other variables which I like

Basically is what you are saying is you have your ECU doing everything that the autorad controller will do but with a little cleaner installation.
Did you get your ECU with a custom program to control your fans? (is that possible?)
Thanks for all the info.

[GregWeld]

Some ECU's have this capability - some do not (running two fans). If not - you can control two fans with the SPAL PWM controller or similar. I like the SPAL version - it is easy to use - water proof - and with the addition of one relay will run twin fans. I like it's strategy of running the fans for awhile after turning off the A/C for a cool down period etc.

I know the FAST EFI has dual fan control... as did my Accel Gen 7 ECU

[JustinB]

Greg, where are you finding the Spal Pwm controllers? From what I have been told Spal is no longer making them and I can't anybody who has some on the shelf.