Engine themostat temp choices
Thread Starter
Staging Lane
Joined: Nov 2006
Posts: 86
Likes: 0
From: B.C. Canada
Engine themostat temp choices I have an LQ4 in my '65 Corvette. Just received a Dewitts Rad/Spal Fan assy. The fan sensor is rated to kick in @ 195deg and off @ 175deg. So with the stock 195 or even a 180 the thing will never turn off. My question is, should I go to a 160 deg? I'm pretty sure that I would prefer not to. I have a shut off switch wired in, with the fan off the temp on the gauge is right on the stat temp, 195, on the highway and creeps up in town till I turn on the fan - the the temp then drops back down to the 195 of the stat. I don't see any sensors that work at the temps I need.
Thanks for your thoughts,
Frank
Thanks for your thoughts,
Frank
Did you look at the fan switch for a say 86 f body with carburetor and 305. If I remember correctly they had a separate switch that grounds a relay and comes on around 220 that would be acceptable. Then you could always use your off switch for on instead if the auto on bothers you but would still have a system that works on it's own.
Thread Starter
Staging Lane
Joined: Nov 2006
Posts: 86
Likes: 0
From: B.C. Canada
Thanks sicks - I'll look at it.
This thing would work too .....
http://www.summitracing.com/int/part...reviews?page=2
Thanks for the input ...
This thing would work too .....
http://www.summitracing.com/int/part...reviews?page=2
Thanks for the input ...
+1 for letting the pcm control the fans. Also, I hope you stick with your gut and don't go with the 160 tstat. The engine has been designed and validated to run in the low 200's.
I've have a 160*F stat in my car and it runs at 172*-174* F at highway speeds, and 180*-185*F in low speed traffic. No way would I use a stock stat unless your driving it in the winter.
There is a reason why every reputable tuner uses a 160*F stat in a car that is driven in warm weather.
Russ Kemp
There is a reason why every reputable tuner uses a 160*F stat in a car that is driven in warm weather.
Russ Kemp
I went back to a stock 'stat from a "160". All you lose
is a cold motor when you don't need it, the upper end
of the temp range has nothing to do with the 'stat -
just radiator heat throw, comprising core thickness,
cooling airflow and outside air temps.
You can tune it tighter, when ECT swings less. A cold
'stat swings the coolant temp wider following driving
history.
is a cold motor when you don't need it, the upper end
of the temp range has nothing to do with the 'stat -
just radiator heat throw, comprising core thickness,
cooling airflow and outside air temps.
You can tune it tighter, when ECT swings less. A cold
'stat swings the coolant temp wider following driving
history.
