Hello,

We're a tuning company in switzerland. We two weeks ago we installed a procharger on a c6, with great results. As temperatures have rised now in summer till 36 degrees Celsius, the vette is struggling with heat problems and the AC cuttinge out.

What it's all about:

I'm looking for a cooler Thermostat (esp. Part number or just a clear identification for odering)

Help very appreciated.

Regards

Adil

 

Look one thread up from this one and read Big Bollas solution.

I also have the AC going out once in a while issue.

My car runs about 210-217 in high 90's weather normal driving conditions, and high 220's in the 110 plus weather.

Good luck.

 

Had similar issues with my ProCharger setup during the current heatwave here in So Cal; addressed this issues to my local dealership, they anglized the A/C freon level & reduced it from 1.40 lbs to 1.10 per bulltin doc #1680700

 

Base, here is a recent thread that discusses reducing the heat relate issues with Procharger by remounting the intercooler.

http://forums.corvetteforum.com/show....php?t=1452563

 

Thanks for all the replies!!

So you guys recommend to not change the thermostat?
I understand that the relocation of the intercooler is the better and smarter way. Wouldn't that be alot easier, to change the thermostat (timewise)?

Regards

Adil

 

Baselbieter,

The thermostat change will lower operating temperatures in cooler conditions, but the problem is the amount of heat (BTUs/hour) that can be exchanged when ambient temperatures get hotter, or the car driven harder. A cooler thermostat does not increase the radiator heat exchange capacity (BTUs/hour). The limited airflow to the radiator causes higher operating temperatures. This means you will need to either 1) install a racing radiator, 2) do a modification like the one here describing the intercooler relocation, or 3) try a cooling additive like Water Wetter. The fix will depend upon how much you need to reduce operating temperatures. I am having the intercooler relocation done right now on my Procharged C6. I am in California where the temperatures have been around 43C to 45C. I am using Water Wetter which helped in moderate temperatures 35C, but above that, in slow traffic and going uphill I still saw coolant temperatures up to 230F. I thought that I would do the intercooler relocation, before going to an expensive and fatter radiator which might be difficult to fit.

I just got back from a great half month in Switzerland (beautiful country and great people), where I saw a very nice custom 427 C3 in Appenzell, a C5 in Lugano, and a new red C6 in Lucerne. Your roads are made for Vettes. Good luck.

Adi

 

Thanks for all the replies!!

I think well go for the IC relocation as it seems to be the best way. Mybe also adding some water additives.

nw07heavy: Jep, some roads here are reall fun!!! But one of our customers went on the german motorway, that guy is insane. And the best was, when he came back he just said. WOW, i had 320 Kmh on my speedo and only 4500 RPM


Regards

Adil

 

Also get your reprogram your computer so the fan to kick on at 180 degrees, not sure what that is in Celsius.

 

Base " let me know if you need any info when doing this mod.
Also let us know if it works for you

 

Thanks for the help guys & good idea with the fan kicking in earlier!!

Cheers

 

Baselbieter,

Good luck with your mods; they should lower the operating temperatures a bit. I'll give you a call/email next time I am in CH/ZRH.

Big Bollas,

I just got my Procharged C6 M6 out of the shop. I had your intercooler relocation done. Temps here are currently low at about 85F to 90F. No time to do a test, but I read 192 to 194F (all digital, all coolant, A/C at 74F/recirculate) on level ground at steady cruise of 75mph at 85F to 90F, where previously I would have seen about 198F to 203F. On much cooler days of 60F, the coolest I normally see at 75mph cruise is 189F to 192F. On a long uphill grade at 75mph, where the indicated ambient was 90F, I saw a 203F coolant temperature reading, where I would have previously seen 213F or so. I will do more testing when temps get back over 100F. At stop lights in stop and go traffic the coolant temperature drops much more rapidly at idle than it did previously. The mod has definitely improved cooling, and has been worth doing. If this will keep my coolant temps below 220F under high heat AND heavy loads I will not need a thicker racing radiator. If not, that is my next step. I'll post as soon as I have a high ambient temperature day. Incidentally, I am using a 170F thermostat, Water Wetter and 25% GM glycol (in lieu of the 50%), which probably accounts for our different readings. There are probably some differences in our installations and cars which account for our different readings. Again, thanks for your post.

 

Good deal .
I kept the 50/50 mix and it has been good
Keep me updated on your results

P.S. did you just get your blower put on or did you have it and then do the intercooler mod?

 

I had the blower installed in February, and had the IC mod done this last weekend so I could definitely notice the cooling ability of the car improve. I'll keep you posted on a hot day test.

 

 

The C6 has different fan tuning ability in ECM then the C5 does.
The coldest value when fans can be commanded to rotate faster is 87 C (188 F) so no matter what you do as colder Tstat the tuning still only would allow control over that 199 degrees.

Where in the C5 the fan tuning tables allowed making changes as when the low and high speed fans came on which could be set to 160 deg if you wanted in the C6 GM got smarter to us making tuning changes by limiting when fans can be controlled with ECM fan table changes

C6 with supercharger really requires a higher flow radiator and good engine oil cooler along with what changes can be done to fan table setting in ECM

 

A racing radiator will be the next step if coolant temps get above around 220F. I hope the IC mod does the trick, but if not a racing radiator may be in my future. You brought up an interesting point in a better oil cooler. What temp drop would a "good" oil cooler provide (maybe an alternative to the racing radiator?) Suggestions for an oil cooler, fit issues, road clearance, reliability, etc? I won't be using my car on tracks, but want dependable cooling in a comfortable range (220F and below) for high load/high temp use. Car is a Z51 M6.

 

I think De Witts has a heavy duty radiator with an EOC built in