Re: '165 switching both fans from the ECM?

["Jim Wilson" <Wilson.James4@worldnet.att.net>]

   Kevin,

  I have a 92 LT1 Vette and I switch both primary and secondary fans from
the ECM. Stock the primary fan comes on about 220 Degrees and the Secondary
is on about  230 Degrees. This is way to hot for my blown application. I
have changed them to both come on at the same time 190 degrees and off @ 180
Degrees. This with a 160 Degree thermostat works super. Even on a hot day I
never go over 195.





-----Original Message-----
From: Kevin Crain <kevin@warpten.com>
To: gmecm@diy-efi.org <gmecm@diy-efi.org>
Date: Friday, May 26, 2000 6:04 PM
Subject: '165 switching both fans from the ECM?


Hiya folks-

I'm running a '165 ECM with a dual cooling fan setup, one is switched from
the ECM and the "aux" fan is switched from a thermostatic switch in the
passenger side cyl head.  I'd like to run both fans from the ECM so I'd
have better control, playing with different thermo switches is kinda
low-tech.

It seems the easy path is to switch both pri and aux fan relays from the
same circuit...this would put both fans under ECM control and whatever
logic I give via the .bin.  Any reason not to do this?  Would switching two
relays put too much load on the ECM fan driver?  Is there a better way
(aside from a toggle switch in the cockpit)?

Thanks,
-Kevin Crain
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