tscales

Mike Norris is just finishing up my 422 with a D1-SC and is seeing some real temp problems. Sitting in the shop with the AC on, it's going north of 240 degrees. Since it is hot and lots of traffic here, that's a problem!

We've talked about the Be Cool, Water Wetter and a pusher fan, but I'd love to hear suggestions.....

Tom

QuickSilver2002

Don't know the answer myself, but have read post here and on ls1tech referring to 3 different solutions that supposedly worked.

1. Modify intake to allow stock puller fans to be used (relocating intake seems to require modifications to how the radiator is positioned)

2. Replace single ati puller fan with a higher cfm unit.

3. Replace ati puller with two high volume pushers.

I have also read posts stating that some people are not having any cooling problems at all.

Good luck, and let us know how you get it solved.

Arnie

I have heard of some ATI kits being delivered with the wiring for the fan reversed, I would check that first.

tscales

I'm pretty sure Mike checked that, since we talked about it and he said it was right. I suspect it is a combination of the bigger engine and the D1-SC which pushes more air.

Mike will figure it out.

Tom

MelloYellow

Get rid of the DexCool. Make sure you are running a 160* Thermo and fans at 170*.

I'd switch to a 35% Ethylene Glycol & Distilled water mix. Use Water Wetter in addition. Basically 1 Gallone Prestone, 1 Water Wetter the rest Distilled.

Make sure to flush the Dexsludge with hose tap water, refill, start the car, bring to op temp, let thermo open and flush block, turn on heater, drain clear fluid. Possibly repeat, then refill to above.


[Modified by MelloYellow, 11:53 PM 9/23/2002]

ZZ

Tom, had similar problem with my 422/SC. Kenny thought mine was a tuning/computer issue, and he believes they have it corrected. It appeared as though the fans were not being turned on and running for appropriate times. As it sits now, they have finished the cog drive and the 422 is able to flow so much air, that they are waiting now on a specially built ATI F1 for mine. If I hear anything more specific I'll let you know. FWIW, my pcm had some faulty circuts and I needed a new pcm.

ZZ

2000^C5

Tom,
off topic, I was at Mike's today to pick up my car.

The heads/cam is awesome. Really fun to drive. I hope I will be happy with it and don't get as radical as you are going. :D

I saw your car there and it looks great. Hope she will be ready soon, I know you waited a looooong time. :cool: :cheers:

SomeDay

I can tell you from experience that adding a pusher fan won't help. Gonna try a 2950 cfm fan to replace the ATI fan.
http://www.permacool.com/Catalog/Cat_page16.html

Mopar Jimmy

My car went to 230 coolant temps down to 178 now by cleaning crap out between radiator and ac condensor and by running during the summer 80% distilled water, 20% coolant and 2 bottles of water wetter.

Also, make sure fans are coming on around 170 and run a 160 hypertech stat. But then again i am not running big cubes or a procharger and maybe a BE COOL Radiator would get it done for you.

Goodluck with that MONSTERRRRRRRRRRRRRRRRRRRR!

Nitrovette :cheers:


[Modified by Nitrovette, 3:11 PM 8/22/2002]

SCOTTYV17

we just installed our ati p-1sc and our having a rise in temps at idle with a/c on also ... we haven`t had the PCM tuned yet this may help .. but we are now waiting for our procharger to return from being upgraded to a d-1sc and the PCM has been sent to ed wright and hopefully things will run a tad cooler now 225+ (we did have the ATI fan with the reversed wiring)
possible BE COOL rad coming if the tuning doesn`t help ....
waiting on some other goodies we ordered today ,
kirban shifter
spec stage 3 clutch with adj master cylinder set up
brake duct screens
coolie shifter ****
hypertech 160 thermostat
katech billet tensioner

scott




[Modified by SCOTTYV17, 6:10 AM 8/22/2002]

livinitup

Mine is running cooler now with that $150 switch that turns the fan on early but sitting in traffic the temp will rise to 230. I'm wondering about this stuff <http://www.evanscooling.com/main21.htm> that I read about in the letters section of the 9/02 Car and Driver (p. 18). But like the editor said, it isn't approved by any automaker. I might try it, though.

Hutch

Heck, that doesn't sound bad. I've seen 240 with my stock 02 Z06 (although I didn't like it). I just ordered a 172 stat and a Vinci Constant Fan Monitor kit so we'll see how that works. The Vinci unit and a 160 stat worked great in my LT4.

KerryH

Please don't waste your money on that $ 150.00 switch, man they really seen you coming on that one. It's just an off the shelf switch from pep boys that sells for $ 39.00. Some one in one of the other threads in a different area here explains it and how exactly to install it. Did one on a friends car in little less that an hour. Works great, and because we didn't buy it from someone calling it a "corvette" part we saved $ 111.00.

Mad_Dog

I spoke with them and you will have to put in a larger radiator if you use it with a SC. :mad

kewlbrz

I'd check with Andy and A&A Corvettes. He redesigned some of the ATI installation, and was able to retain the facotry fans I beleive, among other enhancements, including some better clearance.

Red C5

No overheating for me, just keep losing belts. :confused:

bradfordjr

tscales:

I was having the same overheating issues as you :yesnod: I finally went with a BeCool Radiator and a 2350 CFM replacement fan for the ATI :jester
I also flushed-out the coolant and went with 2 gallons of distilled water, 2 water-weter, and the rest dexcool. My car rarely gets near 200* now, even in stop-and-go traffic :D

tscales

I also have the BeCool and the bigger fan. It's fine, under 200 in almost every situation except stopped in traffic in 95+ degree heat. Then it climbs. How high? I don't know. I always turn off the air at about 220.

Mike's got some changes to make to put the stock fans back in and that should do it.

Tom

Jim Shearer

Please post the fan brand, model, and where you purchased it. I have only had minor problems with overheating so I want to install a higher CFM fan this winter when the snow is flying.

Shinobi'sZ

There are some good points here.
First is that the individuals with larger displacement motors need a bigger radiator. 427's getting hot are nothing new to the Corvette (I almost bought a 1968 427, but it was overheating). I think all the guys I know with Super Strokers use a larger capacity/bigger core rad...

There are a couple of fixes that only a couple of places that I would trust could fix your car.

Goldenwestperformance.com (GWP) who uses an after market 3 core single intercooler w/new plumbing. They did a car that recently won the "Silverstate" 150 MPH class. Averaging 149 MPH, 1 hour, in the high desert, and never got above 205 degrees.

Then there is A&A Corvette, who have also re-configured the rad to run the stock fans (2 are better than 1).

I think Xtreme is also looking into similar options,,but I am not sure.

B Cool also sells a straight blade fan that replaces the 8 blade fan that comes with the ATI kit...it supposedly draws in around 650 more cfm of air.

Good Luck