I don't think it should really matter but this has me wondering.

After resovling many issues with the fan and overheating, the fan would come on around 230-235, according to the guage.

After I replaced the 180 stat with a new 180 stat, I decided to take advantage of having being half way there all ready and ran the t/b bypass.

Ever since, the fan comes on at a higher tiemp 240-250? Coincidence?

As long as the car is moving, life is great, usually under 220. But when in stop and go driving it gets pretty hot as stated, and comes down quickly back to 220 with the fan.

Just wondering if anyone else ahs a similar result after running the bypass.

It's a '85 Z28 305 TPI, single fan, ECM controlled, NO SWITCH. Air damn is in place, man what a difference they make!

 

Shouldn't matter. The TB bypass will only keep the TB from having the incoming air warmed. The coolant passage designed for winter or cold driving situations, so you're just changing the heat of the incoming air and maybe a little heat transfer into the metal. If you're still having problems I would consider a manual fan switch or buying another electric fan control switch. You should beable to find them anywhere from 175 to 200+ degrees ON or an adjustable one.

I don't know about everyone else but I just like seeing the car get up to around 180/190 degrees. Course, I don't have to worry about emissions here. I usually start worrying if I get above 210 or 215 degrees.

 

I didin't think it would make much difference either.

I do have to stay emissions friendly and they are getting really pokey up here and looking a little closer at things.

Fan switch is not an option because there isn't one. I was just looking at a adjustable relay unit. From what I gather, it takes the ECM out of the picture by using a temp porbe in place of the CTS and runs independent.