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Thread: PWM radiator fan controller
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08-02-2015 #1
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Yes, I get the difference in frequency for the different fans. I tried 100 Hz just now for fun. No joy.
This isn't a tuning issue, I don't think. GM disabled pwm fan control on purpose on the crate motor offerings. It's not clear to me if that was done in the ECU, or in the OS.
Hedging my bets, I have a 2011 E67 (originally off a V6 Malibu) on its way to a fellow in Austin who is upgrading the VIN and OS to a 2011 ZR1. From there, I can transfer my LS9 tune to that setup, and then I'll have my fan control. It's been an expensive and frustrating lesson... I was told this would work, but it doesn't. Not with the crate motors.
Oh, and one more thing: I've had two tuners tell me that the C6 controllers are problematic, and that the smart guys upgrade their controllers to high quality solid state relays. So I put all this work and money into getting to the C6 controllers, and that might not be the best destination!Last edited by parsonsj; 08-02-2015 at 07:25 AM.
John Parsons
UnRivaled Rides -- Modern upgrades for your ride.
UnRivaled Rides recent project -- LS9-powered 69 Camaro
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08-02-2015 #2
New to Pro-Touring
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- Aug 2015
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Its a shame if GM left this out of their crate engine stuff. Hopefully the new ecm and OS will shed some light on this for you.
When I get the CTSV working I will post the settings up. I have not found anyone to confirm that they have been able to make it work at this point, but really want to have the fans working with pwm.
Thanks to everyone for sharing their findings.
DJ
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