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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
thank you! sorry for the late response. Just recently did the "muffler mod" have about 1000 miles on the setup now runs great. My only issue now is getting rid of some KR in the tune because crappy 91 octane and hot ECT and IAT it can only get about 14-16 degrees of timing at wot right now sadly. May get that 160 thermostat and a bigger radiator eventually and tweak the fan settings just a tad. The AHP 116 camshaft is just right enough chop and smooth never bucks or surges.
I would go with a bigger radiator before the 160° 'stat. I've had a DeWitts for 20+ years. Sure, you can find a cheaper radiator. Will it last 20+ years? Maybe. Maybe not. Maybe not could be a real bitch at 11:00 P.M. 30 miles from the nearest wrecker...
I would go with a bigger radiator before the 160° 'stat. I've had a DeWitts for 20+ years. Sure, you can find a cheaper radiator. Will it last 20+ years? Maybe. Maybe not. Maybe not could be a real bitch at 11:00 P.M. 30 miles from the nearest wrecker...
I agree with you on this 100%
I'm not convinced the 160 T Stat really does anything for cooling.
The Dewitt is a huge upgrade over the stock radiator. We also just recently installed a set of there new Brushless fans that seem really nice. Prior we have always used the Prospeed fans but these new brushless fans seem really nice!
Kohle did you go with the new Dewitts dual 11-inch brushless fan on that install or the big single brushless fan? I run Dewitts big single fan. BTW the shroud is a cut to fit (side-to-side 22.5 inches to 27 inches) making a nice add on to other older hot rods. On this one I had to cut it offset a little to miss the ABS box.
Last edited by double06; May 23, 2026 at 08:39 AM.
Kohle did you go with the new Dewitts dual 11-inch brushless fan on that install or the big single brushless fan? I run Dewitts big single fan. BTW the shroud is a cut to fit (side-to-side 22.5 inches to 27 inches) making a nice add on to other older hot rods. On this one I had to cut it offset a little to miss the ABS box.
The customer provided the Dual Brushless fans for this build. I have never used them before but they seem well built and nice.
I have always purchased and run the pro speed fans so we will see how the new Dewitts Brushless fans compare as time goes on. We shall see.
I would go with a bigger radiator before the 160° 'stat. I've had a DeWitts for 20+ years. Sure, you can find a cheaper radiator. Will it last 20+ years? Maybe. Maybe not. Maybe not could be a real bitch at 11:00 P.M. 30 miles from the nearest wrecker...
Roger that thanks for the advice, I will definitely do the DeWitts radiator. Buddy of mine did the 160 tstat and increased fans speeds but has had issues with the fan relay wiring melting..sure his car runs cooler but at what cost..we definitely dont want that.
Kohle did you go with the new Dewitts dual 11-inch brushless fan on that install or the big single brushless fan? I run Dewitts big single fan. BTW the shroud is a cut to fit (side-to-side 22.5 inches to 27 inches) making a nice add on to other older hot rods. On this one I had to cut it offset a little to miss the ABS box.
definitely a clean setup hows the temps on the car?
I agree with you on this 100%
I'm not convinced the 160 T Stat really does anything for cooling.
The Dewitt is a huge upgrade over the stock radiator. We also just recently installed a set of there new Brushless fans that seem really nice. Prior we have always used the Prospeed fans but these new brushless fans seem really nice!
