Coolant temp switch
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
For as hot as C4's run, the aftermarket thermostatic switch you describe would turn on the auxilliary fan at 200 F and would likely keep it on as the coolant temperature wouldn't likely fall below 180 F with a 180 F thermostat in the engine. 200 F is too low a temp for the auxilliary fan to come on as the main fan doesn't come on until 228 F.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Originally Posted by jfb
For as hot as C4's run, the aftermarket thermostatic switch you describe would turn on the auxilliary fan at 200 F and would likely keep it on as the coolant temperature wouldn't likely fall below 180 F with a 180 F thermostat in the engine. 200 F is too low a temp for the auxilliary fan to come on as the main fan doesn't come on until 228 F.
Then, if/when it gets to 228, the primary fan would kick in to help.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Don't expect it to work as intended if you keep a 180 stat in there with it. It might work with a 170.
Why bother with the aux fan? It's small and is an unshrouded pusher fan. Use the big fan.
Why bother with the aux fan? It's small and is an unshrouded pusher fan. Use the big fan.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Originally Posted by CentralCoaster
Why bother with the aux fan? It's small and is an unshrouded pusher fan. Use the big fan.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Originally Posted by GREGGPENN
If it's so inadequate, why did Chevy install them at all?
Why ride your scooter to work on the freeway when you have a fullsize car in the garage?
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I am currently repairing the fan relay wiring harness.
Advanced
Joined: Jan 2006
Posts: 96
Likes: 0
From: Suwanee Georgia
Good points, I installed my Ecklers 200 fan switch late last week on my 86 and I run a 195 Stat since its winter. That poor little auxilary fan stays on pretty much the whole time trying to keep 200 degrees. Unless I am moving at around 30 miles per hour or more it hangs around 185-200. Loud little sucker too!!! In the summer I will swap out thermo to 160. But for now, the "heavy duty cooling package" will work its butt off.
