We are Endurance Racing a 2006 3.5l Chevy Impala FWD auto. 24 Hours of Lemons Racing dictates that the cars need to be purchased for less than $500US or $550 Cdn. To meet their safety requirements, much more money is then spent to put in the race seat, roll cage, brakes, rims, tires, exhaust, etc. etc. Lemons piles 100 cars onto a track and then has them race against each other for 8 hours on Saturday and usually 7 hours on Sunday. With the closure of the US border and the distance involved in traveling to the Lemons races, we have turned to Lucky Dog Racing Canada. We could not afford the 3.9l Police version nor the 5.3l SS version of the Impala, (they were definitely not $500) we got what we have. However, we now want to "tune" the 4t65e transmission from Granny "maximum economical" mode into a performance tune that meets our race specifications.
We are racing on Continental Extreme Sport 255/40ZR/17 tires that generate 831 revs/mile. Our 3.5l generates a maximum of 214 ft lbs of torque at 4000RPM and 211 HP at 5900 RPM. The final drive in our transmission is 2.86. The ratios are 1st: 2.92, 2nd: 1.56, 3rd: 1.0 and 4th: .70. Our transmission was completely rebuilt this past summer after overheating the season before. A transmission cooler has been installed. If I use the calculations as per this article:
http://www.yourdatadriven.com/best-g...-a-racing-car/
My optimal shift points are: 1st - all the way to red line 6400RPM or 85kph, 2nd - 5500RPM or 140kph, 3rd - 5000 RPM or 190kph, 4th - rarely used maybe at the end of Calabogie Motorsports back straightaway.....
So, since I'm brand new to HP Tuners and the VCM Editor, could I solicit comments, suggestions and advice regarding the set-up of the TCM based on a successful upload of the OE configuration from the HP Forum? Correct me if I'm wrong but I need to start here at the Speedo page first? The Calibration tab?
Thanks in advance, Richard.