Anyone know the pin out for the fan control on the E67? I can't see it on my pin out...called something else?

Donny,

Why is there a need for the wire from the AC control to be an input to the HP?

I am trying to help Larry, but I don't know enough about AC systems, although I am good with the Holley system.

He has a 0-5v sensor installed in the AC system, but there seems to be very little variability in pressure. I sent you a PM on PT...if you have time...

Andrew

Does anyone know anything about the PWM configuration on the new LT1 and LT4 GMPP kits that use the e92 ECU?

Presumably there is a PWM output, but maybe GMPP did away with it on the retrofit kits (as they did on the e67 kits, as John Parsons experienced). I also know that the new generation of fans the WPM controller is built into the fans, so no intermediate controller (like the C6) is needed.

Andrew

I have an LT4 and the GMPP controller kit, and a late model CTS-V cooling fan, but we're a month or two from finishing wiring and getting things running. I am hoping that I can reprogram the e92 with HPTuners to do PWM control as it does in a CTS-V - we'll see. Why GM would block PWM control in the crate motor ECUs is beyond me ...

Thanks for chiming in! Please keep this thread updated. I know from another LT4 build that the stock GMPP fan configuration is discrete fan control, with a Hi and Low fan setting. PWM would be way better, especially if you're using the new CTSV 800watt fan.

Have you found a source for the Yazaki connector and terminals for the fan?

Andrew

The A/C pressure sensor is wired in at pins J3-21 (reference ground), J3-37 (reference 5V), and J3-57 (signal).

The PWM control wire is J3-64 (FANSPD:IMTVPS)

Fan connectors
 

I haven't seen the CTS-V fan. Does it use the same connectors as the C7 Corvette and the aftermarket released Spal DC brushless fans? If so I have those connectors in stock as kits with terminals seals etc.

Here is what I have:

http://photos.proservsolutions.com/F...23211&mt=Photo

Multiple terminals and seals are provided to account for different gauge wire applications.

Jason Haines
Product & Service Solutions LLC
[email protected]
www.proservsolutions.com

I got the connector from Summit:

https://www.summitracing.com/parts/SPU-IXSBLYAZPT

Edit: the above part number is complete connector, terminals, and harness.

The GMPP controller is indeed set up for discrete control as it comes, I'm just assuming I can change that like on most GM ECU.

Scott

Scott,

Thanks for the info!!!

I am eager to see if you can change the tune in the e92 for PWM fan control.

Andrew

Has the E38 been figured out for PWM fan control?

I have a 2010 Camaro and a radiator coming with twin Spal brushless fans. I called Spal and they wouldn't tell me anything because of an NDA with GM as they are an OEM supplier. I called the place building the radiator and was told the same thing but they'd see what, if anything, they could find out because they have not installed in a 2010 Camaro.

Dave Steck (DSX Tuning) is a friend of mine and I contacted him about it. He said the Corvette and Camaro E38 OS are the same but have differing CANbus communication. He said he sees no reason I can't control the fans with PWM because the OS has PWM Electric as a choice. That is a screenshot of my actual tune showing it.

Unless I missed something in this thread (quite possible) I haven't seen anyone successfully running PWM in a 5th Gen Camaro and an E38 ECM.

It would be nice to be able to just drop the new fans in, connect the wires and go.

ETA: I don't know which fans I'm getting as the place (wizard cooling) is going to use the biggest ones that will fit. 14" diameter and 3. 25" thickness was mentioned. I am not aware of any other aftermarket 5th Gen radiator having 14" fans though.