Performance radiator for supercharged application
Race Director
Joined: Dec 1999
Posts: 10,230
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From: Alexandria, Virginia, USA VA
the factory rad is pretty efficient and uber cheap. Throw the better fans on which aren't too bad and run a fresh clean rad and you will likely be fine
the water wetter and other similar products help too. The dewitts is pricey
the water wetter and other similar products help too. The dewitts is pricey
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Drifting
Joined: Nov 2014
Posts: 1,979
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From: Switzerland
Guys, I have a 99C5 with the ECS supercharger and the stock radiator while it works has started to leak a little. My car tends to run a little warm when using the air conditioning does not overheat and based on the gauge reading, my guess is it’s somewhere around 210 but I do have an intercooler in front of it as well as the condenser still but I’d like to upgrade the stock radiator to maybe something a little bigger. I don’t want to go to big as I don’t have tons of extra space but I do have extra space as I could see. What is a good recommendation for it and upgrade to the radiator.? What are you guys using?
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Drifting
Joined: Nov 2014
Posts: 1,979
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From: Switzerland
are you using one of the "dongles"? i have about 1.5" of free space there with the esc kit and stock radiator. or are you trying to go straight out? this doesn improve anything, i mentioned that somewhere on here a few years back.
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Joined: Jul 2022
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what are you refering too? got a pic? i bought it however is is this way. also i want improved cooling capacity.....mine runs a tad warm with a/c on on hot days and spirited driving
Le Mans Master
Joined: Oct 2010
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From: cold & windy
as most have mentioned: the Ron Davis & DeWitts are the top choices for upgraded radiators (but expensive as all get-out).
plenty of guys have tried the sweat-shop aluminum radiators over the years - very hit or miss on the quality.
gotta spell it out nowadays, man... i don't think you can text message 1-800 numbers, and young'uns don't correlate letters to the numerical dial or keypad no more. 
and for the record: i've got a supercharger (of the TVS persuasion), and my intake tube fits just fine over a standard radiator. the cut-down designs are specifically for the centrifugal blowers that also run big intake tubes - not required for just "any supercharger".
plenty of guys have tried the sweat-shop aluminum radiators over the years - very hit or miss on the quality.
and for the record: i've got a supercharger (of the TVS persuasion), and my intake tube fits just fine over a standard radiator. the cut-down designs are specifically for the centrifugal blowers that also run big intake tubes - not required for just "any supercharger".
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Joined: Jul 2022
Posts: 86
Likes: 7
as most have mentioned: the Ron Davis & DeWitts are the top choices for upgraded radiators (but expensive as all get-out).
plenty of guys have tried the sweat-shop aluminum radiators over the years - very hit or miss on the quality.
gotta spell it out nowadays, man... i don't think you can text message 1-800 numbers, and young'uns don't correlate letters to the numerical dial or keypad no more.
and for the record: i've got a supercharger (of the TVS persuasion), and my intake tube fits just fine over a standard radiator. the cut-down designs are specifically for the centrifugal blowers that also run big intake tubes - not required for just "any supercharger".
plenty of guys have tried the sweat-shop aluminum radiators over the years - very hit or miss on the quality.
gotta spell it out nowadays, man... i don't think you can text message 1-800 numbers, and young'uns don't correlate letters to the numerical dial or keypad no more.
and for the record: i've got a supercharger (of the TVS persuasion), and my intake tube fits just fine over a standard radiator. the cut-down designs are specifically for the centrifugal blowers that also run big intake tubes - not required for just "any supercharger".
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Drifting
Joined: Nov 2014
Posts: 1,979
Likes: 110
From: Switzerland
im just saying you dont need a cut down, what for? at least not on my car (99c5) with ecs kit.
Pro
Joined: Jul 2007
Posts: 538
Likes: 117
From: New Braunfels Texas
I went with the ECP(Engineered Cooling Products) for $347 plus tax and shipping. Very nice quality and my car is definitely running cooler. Fit was good as well. speedcooling.com
My supercharged Z is running on the thermostat at 180 degrees in 103-degree temperatures here in south Texas. I had a problem with a Motorad thermostat first but now with Mr Gasket t-stat I am very happy with the results.
My supercharged Z is running on the thermostat at 180 degrees in 103-degree temperatures here in south Texas. I had a problem with a Motorad thermostat first but now with Mr Gasket t-stat I am very happy with the results.
Last edited by XLR8-R; Jul 29, 2023 at 11:17 AM. Reason: ADDING INFO
Le Mans Master
Joined: Jan 2000
Posts: 6,299
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From: Michigan
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
good fast cheap pick any 2
I've run dewitts in
95 lpe zr1
2003 twin turbo z06
2004 416 d1x (coming soon, blower install in progress)
with the high hp, comes high heat. You shouldn't cheap out and ruin an expensive engine with an "also ran" rad that doesn't work
the factory rad stinks, thin, plastic end tanks that crack and leak
when the get a bit of miles on them the plastic craps out And the bottom feeder vettes clog up the radiators pretty fast
I might need that "cut down" for the blower project, if so, they have them.
been very happy with the products.
I've run dewitts in
95 lpe zr1
2003 twin turbo z06
2004 416 d1x (coming soon, blower install in progress)
with the high hp, comes high heat. You shouldn't cheap out and ruin an expensive engine with an "also ran" rad that doesn't work
the factory rad stinks, thin, plastic end tanks that crack and leak
when the get a bit of miles on them the plastic craps out And the bottom feeder vettes clog up the radiators pretty fast
I might need that "cut down" for the blower project, if so, they have them.
been very happy with the products.
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Joined: Jul 2022
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