Has anyone installed a Dewitt's short blower style radiator on their supercharged C5? How much did coolant temps drop? Did you retain the stock fans? I currently have an A&A Corvette Performance P1SC blower set-up with a laid down radiator and a large single intercooler, FLP Level IV tranny and Z06 3.42 gears with a Vigilante 2800 stall converter. I run hotter than most during high speed cruising due to my gearing.

I am considering changing radiators before driving back to Bowling Green in Sept.

 

Interested as well. Not running hot but the angle the inlet of my blower is at because of the stock radiator height is ridiculous.

 

curious as to why the gears make you run hotter?

 

Higher rpm's produce more friction and heat.
Try cruising on the freeway in a lower gear for an hour, and then compare that with the temperatures and fuel economy from cruising in the highest gear.

 

I guess i said it wrong, the Z06 comes with 342 gears so why would 342 gears makes his car run hotter than most? What is the "most"? I only assume coupe's that had a diferent gear ratio. With that statement, what does the OP consider to be "hotter"

 

It's not a ZO6. It's an auto trans car with 3.42 ZO6 manual trans rear gears. Add the 2800 stall, and rpms will be much higher than stock.

 

So what tempetures do auto cars run? I would assume that GM ran them all around a base temp? Have no clue as I dont have an auto car. I do know that mine runs @ 198deg with a 160 therm and a large FMIC in the way. Thats on a 100deg day and sitting in traffic along with some spirited runs.

Not trying to base my car against his, just wanting to understand what"hotter" is and help in diagnosing it for him.

One thing I did with mine to lower temps was to move the center air dam back 2 inches. Dropped my temps w/ac on the freeway from 230+ to 198. Possibly that could help him or mine might have just been a fluke.

 

[QUOTE=powderski13;1570730312]Has anyone installed a Dewitt's short blower style radiator on their supercharged C5? How much did coolant temps drop? Did you retain the stock fans? I currently have an A&A Corvette Performance P1SC blower set-up with a laid down radiator and a large single intercooler, FLP Level IV tranny and Z06 3.42 gears with a Vigilante 2800 stall converter. I run hotter than most during high speed cruising due to my gearing.

I am considering changing radiators before driving back to Bowling Green in Sept.


To further explain, a stock auto transmission car will run slighty hotter than a 6-speed car due to the AT cooler lines running into the radiator. When a changed to the 3.42 gears the rpms at 75 mph went from 1900 to 2400, a 25% increase. A 6-speed car would be turning over approximately 1710 rpm at 75 mph. At 75 mph on a 100 degree day I will be running at 235 to 240 degrees. I have maxed the recovery capacity of the radiator.

My question remains, have you installed a Dewitts blower style short twin core radiator and how much did it drop your water temps.

Thanks

 

Thanks for the explanation! I dont have any idea about the radiator. I had heat issues after I mounted a large FMIC. Mine were solved when I moved the air dam back further against the eveporator core, allowing more air in. Not sure if that will help you but could be worth a try. GL on the radiator choice.

 

I don't run hot with mine and I have 3.42's and a YANK 3200 Stall - I removed the Tranny lines out of the radiator and went with an external cooler up front - this made the temps drop tremendously.

I suggest getting a external tranny cooler and running it and if you don't drive it in the freezing weather then BYPASS the radiator all together - when you combine the two they really heat eachother up.

I have a DEWITTS on the way right now and should be here by wednesday - my stocker got a hole and I am going better with the DEWITTS, instead of replacing it with another stocker. I had considered the "SHORTER" radiator but decided against it since my radiator is laying down already and with the DEWITTS it'll be even cooler

Now remember that on the DEWITTS you get a whole extra row (2) over the single row stocker, so with the 2" removed you will still have more coolant and cooling capability of the DEWITTS 2" shorter over the stock no matter what

You are probably looking at only 2 rowsof tubes being removed (from the top down) so for example if you gad 14 rows of tubes from the top down then with the 2" shorter you'd be looking at 12 rows of tubes (and of course you'd double these since it's a two row radiator)

Your gears really shouldn't cause you to heat up that much nor your TQ Converter because at cruising speeds it should be locked up - so look at seperating the tranny lines from the radiator and running an external - if you want to know which one I'm running let me know an i'll post some pics for you too

Also make sure your fans are set to come on earlier and get a cooler thermostat if you have not already done so

Thanks,Matt

 

Matt- U will wish U got the shorter one. I have a Dewitts and I'm probably going to sell it and get the shorter one. My car is lowered and man the radiator cradle is maybe 3in. from the street if I'm lucky. I can't lay mine down anymore due to the fact the driver side fan motor is touching the sway bar. Do yourself a favor bro, and swap it for the shorter one. I bought mine way before I went FI.

 

Interested in the results. My bigger motor seems to be running a little hotter than the stocker but it may be because its been so darn hot and I am varying the RPMs to break it in