I looked at all the parameters but could not find one for the fan settings.

I filled her up with 91 and loaded the Diablo tune. She ran great. I ran her pretty hard 0-115 for about 45min (up & down)let her idle for 15 min, temp did not get higher than 206.I did not adjust the fans because I could not find the settings in the tune. It was around 37 degs out. Ussally she will ...

U7193 current update
2003 Chevy 2500HD 8.1L
I just got a 180* t-stat, stock is 195* is it nessesary to change the fan settings or is it done automaticly with the 87 tune? If so how do I do the change? Thanks

Thanks for all the help Monte. I used the tire size of 285/70/17 & it is dead on at 0-80. I am going to do some logging and slope ajustments next. thx again.

Ok sweet thanks for all your help & Is it ok to try a tire size of 305/70/17 to try to dial in the speedo even closer, even though its not the tru size of the tires (tire on truck 315-70-17).

U7193 purchased 1 week ago
Thanks it worked. The speedo is now only 2mph over instead of 8 under @ 75mph. Is it ok to try a tire size of 305/70/17 to try to dial it in even closer, even though its not the tru size of the tires (315-70-17). Also is the Diablo tune under performance the same as the 91 ...

2003 Checy Silverado 2500HD 8.1L
I imported the Diablo tune to my truck and love it. How do I change the tire size so the speedo reeds correct.315/70/17---thx

Finally got my Diablo Sport Predator in the mail. I read some where that there should be a sticker on the back that tells you what revision it has, is this true. The only sticker on the back of mine is

U7193x
(bar code)
Predator 04Corvette & 03-

New here, I should recieve my Diablo Sport Predator tomorrow. Very nice site. I have been lurking for a couple of months now. I have not seen much feed back on the 8.1L. I sure hope it can wake this beast up. Thanks all

New here, I should recieve my Diablo Sport Predator tomorrow. Very nice site. I have been lurking for a couple of months now. I sure hope this tool can wake up my 8.1 liter beast.