Those brackets are going to make this fan a lot easier to mount. Nice!

I got some good tech on this over on CorvetteForum: http://www.corvetteforum.com/forums/...mp-wiring.html

You got some good tech over there John. Here is a link that might be handy:

http://www.lingenfelter.com/mm5/merc...gory_Code=C534

Lingenfelter makes upgraded coolant pumps that are PWM. Isn't that what you want for this build?

Andrew

Yes, and no. I wanted a PWM installation because I thought that's what GM did with the C6 ZR1. But they didn't -- they just run the pumps at full speed. They even run the pump at full speed in the C7Z06.

My main question was the 3rd wire in the provided GMPP harness -- which I now know is a 5V signal to the ZL1 pump to, you guessed it, run the ZL1 pump at full speed. That wire is not a PWM signal, and there is no PWM option anywhere in the GM lineup, which continues to the present day.

Even the LPE Stewart option just runs at full speed, and is advertised as flowing as well as the ZR1 pump.

So... I'll run the ZR1 pump at full speed. It simplifies the wiring, and wraps up all the engine wiring questions.

Is the PWM fan control Function something that can be turned on with HP tuners?

Edit: Sorry! I thought you were asking about the coolant charge pump. Yep, the fans are easy to do.

HP Tuner dialog for the GMPP LS2 ECM tune. Others probably different.

http://i242.photobucket.com/albums/f...t/hpt_fans.jpg http://i242.photobucket.com/albums/f...hpt_fans-1.jpg

Hey Andrew, I got the C6 fan that you have. Wondering if you are seeing the same as I am. One of the clips with the hole, the hole doesnt line up with the hole in the fan shroud. You seeing that too?

Yes Sir. I noticed that too. I guess I'll slot the hole. Won't be a big deal since you have to use a u-bolt there anyway. I wonder what the stock bolts that go in that location look like. And why is the hole square? LOL

Andrew

I thought I would use something like this:

http://i242.photobucket.com/albums/f...95326_edit.jpg