Fan temp switch question
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Fan temp switch question
I asked about the location and the cylinder head does not seem like the best location. To much heat early and the headers keep it quite hot. Tom from Dewits even does not like it. My real question is what switch to get. I have a 185 on and 160 off. My thermostat is a 180. This would keep the fan running almost all the time. Even a 195/170 would be running quite a bit. Do I change to a 160 thermostat and/or a 195/170 switch. My car ran quite cool with the stock fan and shroud and 180 thermostat. I'd like to keep it running cool with the fans but not run them all the time.
Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
I have the 195 that the Dewitt spal came with and I'd like it to come on sooner. If I'm sitting in traffic and watching the temp gauge climb, I begin to wonder when it's going to kick on. It always does, but I'd like to eliminate having the thought. I'm thinking of wiring a toggle.
Once it kicks on, the temp falls a lot and quickly. It's amazing how much that single fan pulls.
My temp sender is on the passenger side between headers, and I don't see that as an issue. If anything, the 195 comes on too late.
Once it kicks on, the temp falls a lot and quickly. It's amazing how much that single fan pulls.
My temp sender is on the passenger side between headers, and I don't see that as an issue. If anything, the 195 comes on too late.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by foundvettelifeisgood
I have the 195 that the Dewitt spal came with and I'd like it to come on sooner. If I'm sitting in traffic and watching the temp gauge climb, I begin to wonder when it's going to kick on. It always does, but I'd like to eliminate having the thought. I'm thinking of wiring a toggle.
Once it kicks on, the temp falls a lot and quickly. It's amazing how much that single fan pulls.
My temp sender is on the passenger side between headers, and I don't see that as an issue. If anything, the 195 comes on too late.
Once it kicks on, the temp falls a lot and quickly. It's amazing how much that single fan pulls.
My temp sender is on the passenger side between headers, and I don't see that as an issue. If anything, the 195 comes on too late.
Le Mans Master
Joined: Feb 1999
Posts: 6,807
Likes: 0
From: Hoosier
Cruise-In III Veteran
I'm using a 180 t-stat with the sender mounted in the intake manifold. I found the headers, if sender mounted in the head, influenced the sender. It's a Painless sender on at 205 and off at 185. Be sure to get a Robert Shaw type t-stat which is much more accurate.
Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
Originally Posted by Mike Mercury
I forgot... what size is your Spal fan ?
http://www.dewitts.com/pages/product...asp?ProdID=240
Ask Tom Dewitt what's best.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Originally Posted by AlwaysWave
I'm using a 180 t-stat with the sender mounted in the intake manifold. I found the headers, if sender mounted in the head, influenced the sender. It's a Painless sender on at 205 and off at 185. Be sure to get a Robert Shaw type t-stat which is much more accurate.
