cooling cooling help needed

[drives mopars]

got rad hot up to 80 pct on gauge dont know temp was there for



1 minute smoking a duramax pulling 8500 lbs up a

steep grade



he had a 25 trailer i had a 22 ww toy hauler at 8500 lbs



i had him but weighted a lot more but temp went 80 pct on gauge



in 95 degree outside air

i know more air helps but also need eng temp to stay lower



anybody add more rad rows ?????????????

 

[dpuckett]

How long has it been since you had the radiator last thoroughly cleaned? i dont mean the "super flush" type stuff you mix with hose water; taken to a shop, taken apart and rodded out. That will help your cooling quite a bit.



ALso, what kind of air filter set up do you have? At that HP/TQ, you need at least a BHAF, maybe an aFe Mega Cannon, et al. And get a 4" exhaust, esp if you tow a lot. I dropped 100deg or so peak EGT (empty), and I'm not even intercooled. I can still get her hot towing. I'd think if your EGTs are in check (<1250), you shouldnt have water temp issues; I never do, even if i keep the pyro at 1250-1300 for a mile or more. I think the 80% line you speak of is around 210deg- no emergency, but worthy of keeping an eye on it.



And, sad to say, you may just have to wait til the temp gets below 90 to go loaded drag racing. You're at 250% of the power the engine was originally designed for. 250% of the heat the cooling system was designed to take care of. You also might try a 2nd Gen radiator- according to my Chilton book, the cooling capacity of the 2nd Gens rivals that of the old 6. 9L V8 Fords- around 7 gallons. Compare that to 15-18qts for the stock 1st Gens.



Daniel