Suggestions on Dewitts Radiator
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Instructor
Joined: Dec 2004
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Suggestions on Dewitts Radiator
I have a 92 6 speed with lots of Mods, my engine temps run in the range of 230 max in the city and Run 200 on the highway. The only thing on my motor that has not been replaced is the Radiator and a stock T'stat (195??). Fans have been programed previously to kick on at 219 but it still will stay around 230 until I get moving.
So my question to everyone is I will replace the current radiator with an all aluminum Radiator but I am unsure of which degree T'stat to put in a Hypertech 160 or 180 degree?
P.S. there is no debris in between the radiator and condenser it's very clean.
Many Thanks to any help. Chad
So my question to everyone is I will replace the current radiator with an all aluminum Radiator but I am unsure of which degree T'stat to put in a Hypertech 160 or 180 degree?
P.S. there is no debris in between the radiator and condenser it's very clean.
Many Thanks to any help. Chad
Safety Car
Joined: Jan 2004
Posts: 3,783
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From: Northern California
I've always had the best results with the stock 195* thermostat. My "89" Vette's Single fan comes on at 228* in traffic and the coolant temps reach around 169* on the highway on a 60* day.
Running to cool will prevent the computer from switching to closed loop mode.
You should stay with the stock 195* thermostat especially if you're installing an all aluminum radiator.
Running to cool will prevent the computer from switching to closed loop mode.
You should stay with the stock 195* thermostat especially if you're installing an all aluminum radiator.
Last edited by GKK; Dec 17, 2004 at 09:24 PM.
Race Director
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Originally Posted by phxscooby101
One of my main concerns is running the 160 degree stat with the new dewitt's radiator will bring my temps too low, I hear below 180 degrees on average is no good for these motors? Chad
Burning Brakes
Joined: Apr 2002
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From: Cleveland OH
Originally Posted by phxscooby101
One of my main concerns is running the 160 degree stat with the new dewitt's radiator will bring my temps too low, I hear below 180 degrees on average is no good for these motors? Chad
Ron
Le Mans Master
Joined: Apr 2000
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From: Manassas VA
Running a 160 in a LT1-4 is more like running a 180 in a L98. The reason I say this is because of the reverse cooling. The water enters the heads first, and then the block on the LT1-4 motors. This is the reason that the factory t-stat is only rated at 180 on the LT1-4 motors verses the 195 on L98 motors.
I can say with mine it runs better cooler. It makes a difference at the drag strip if I am at 160 degrees, on the gage, verses 190 or so.
I can say with mine it runs better cooler. It makes a difference at the drag strip if I am at 160 degrees, on the gage, verses 190 or so.
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Race Director
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From: Indianapolis IN
This may not help, but I use a 165 stat with a .100 hole drilled into it, my Dewitts has never seen higher than 188-190 mostly becasue my fans are programmed to come on at 185 degrees.
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by phxscooby101
I have a 92 6 speed with lots of Mods, my engine temps run in the range of 230 max in the city and Run 200 on the highway. The only thing on my motor that has not been replaced is the Radiator and a stock T'stat (195??). Fans have been programed previously to kick on at 219 but it still will stay around 230 until I get moving.
So my question to everyone is I will replace the current radiator with an all aluminum Radiator but I am unsure of which degree T'stat to put in a Hypertech 160 or 180 degree?
P.S. there is no debris in between the radiator and condenser it's very clean.
Many Thanks to any help. Chad
So my question to everyone is I will replace the current radiator with an all aluminum Radiator but I am unsure of which degree T'stat to put in a Hypertech 160 or 180 degree?
P.S. there is no debris in between the radiator and condenser it's very clean.
Many Thanks to any help. Chad
Originally Posted by GKK
I've always had the best results with the stock 195* thermostat. My "89" Vette's Single fan comes on at 228* in traffic and the coolant temps reach around 169* on the highway on a 60* day.
Originally Posted by Pete K
Engine temp stays where I like it. 200 ish in the warm weather and 180 in the cooler weather.
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Thread Starter
Instructor
Joined: Dec 2004
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My engine is in the breakin period from a rebuild so I'm not sure if it's normal for this on new rings and pistons+ stainless steel vales 1.5 harland rockers etc... so here in phoenix it's 75 degrees but in the summer it can easliy reach 115 degrees so I'm thinking it will run even hotter then.
Also oil temps are in the 235 to 242 range on convention 10w30 until 6k miles of breakin then I'll switch to mobil synthetic.
I would like to see temps of the coolant in the 200 to 215 range is that possible with the 180 t'stat and Dewitts radiator? Thanks Chad
Also oil temps are in the 235 to 242 range on convention 10w30 until 6k miles of breakin then I'll switch to mobil synthetic.
I would like to see temps of the coolant in the 200 to 215 range is that possible with the 180 t'stat and Dewitts radiator? Thanks Chad
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by phxscooby101
My engine is in the breakin period from a rebuild so I'm not sure if it's normal for this on new rings and pistons+ stainless steel vales 1.5 harland rockers etc... so here in phoenix it's 75 degrees but in the summer it can easliy reach 115 degrees so I'm thinking it will run even hotter then.
Also oil temps are in the 235 to 242 range on convention 10w30 until 6k miles of breakin then I'll switch to mobil synthetic.
I would like to see temps of the coolant in the 200 to 215 range is that possible with the 180 t'stat and Dewitts radiator? Thanks Chad
Also oil temps are in the 235 to 242 range on convention 10w30 until 6k miles of breakin then I'll switch to mobil synthetic.
I would like to see temps of the coolant in the 200 to 215 range is that possible with the 180 t'stat and Dewitts radiator? Thanks Chad
Changing the stat won't lower the temps, since you are already exceeding the opening point. Once it's open, it's open. The DeWitts all aluminum radiator is a serious, and quality piece of work. It is the one *I* would select if I had the need. I'm just not convinced that you need it. If you DO go that route, I doubt you will need a cooler stat. With that radiator, your problem will be getting to run hot enough.
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Le Mans Master
Joined: May 1999
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From: Windermere FL
I put a Dewitts in my 90 and it never overheats anymore, even here in Florida.
I had run a 160 stat for years, but changed it to a 180 last eyar and the car runs overall much better. With a 160 in cool weather, it would never go off of closed loop (or is that open loop?) Anyway, it did not heat up enough for it to run right. IMHO, 180 is the way to go.
I had run a 160 stat for years, but changed it to a 180 last eyar and the car runs overall much better. With a 160 in cool weather, it would never go off of closed loop (or is that open loop?) Anyway, it did not heat up enough for it to run right. IMHO, 180 is the way to go.
Safety Car
Joined: Jan 2004
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From: Northern California
Originally Posted by CFI-EFI
It sounds like your stat has failed in the open position. It should never run that cool on the highway with a 195* stat.
Race Director
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From: The Top of Utah
Originally Posted by GKK
Oops, I meant to say the coolant temp with the 195* thermostat is 169* in 40* weather. I noticed the temps after leaving work at 11pm on a very cold night.
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Le Mans Master
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From: Corvette valley Georgia
St. Jude Donor '06
I have the DeWitts radiator on my 92 vette. the engine is reverse cooled so puting in a 180 thermostat will not help the engine as its designed to run at higher temps. The DeWitt radiator is all you need for reliable cooling.
Melting Slicks
Joined: Apr 2004
Posts: 2,771
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From: cyberspace NY
230 is the GM design point. don't worry about it too much.
mine hasn't melted down yet.
I also have a 1996 B-body all stock, stock thermostat, it hasn't melted down yet either. you know it's running 230 all the time, except on the hiway, it'll cool off a tad..
mine hasn't melted down yet.
I also have a 1996 B-body all stock, stock thermostat, it hasn't melted down yet either. you know it's running 230 all the time, except on the hiway, it'll cool off a tad..
