I put a 94 LT1 in my 68 with mark 8 fan. i wired the fan to the pcm`s primary fan A-11 an 75 amp relay. I have 160 T-stat and want to set the fan to come on at 180. I have no idea how to do this with my tunercat.

 

Go to the "Fan Enable Cooling Temp Vs. Speed" table and set the Fan 1 settings (High and Low) to the temp that you want the A11 pin to go active (0V). With a 160* T-Stat, mine is set for 79.25*C that's 175*F. It gives the T-Stat a chance to be wide open before you turn on the fan. If you set it much lower you could be wasting energy needlessly pushing the fan against a closed or partially opened T-Stat whenever the engine is running. The Fan 2 settings are not important as your setup has nothing wired to the A10 pin.

 

thanks bobdec. Just realized I have to use the EEB program and not the EE because I have the early 94 pcm. There is no "Fan Enable Cooling Temp Vs. Speed" table in the EEB. Now what.

 

Wait a minute, I found the "Fan Enable Cooling Temp Vs. Speed" in the EEB table. Its in the 3rd column at the end. Many thanks