CSX 3170 testing results

[Cobra #3170]

We got some good results in all areas except brake knock back but I have a couple of ideas to try. The new 5.5" crank pulley has completely cured the belt tossing problem. I have a 7.1" water pump pulley and a 3.2" alternator pulley and am using a Dayco 15425 belt. Turned it 8200 and hit the limiter and the belt stayed on. The new floating rotors have only .010 lateral float, I am trying .020 tomorrow by loosening the bolts for a quick trial. if that works I will spot face the rotor mounting surface down .010. We tried a new front splitter, and some Rival-S rears in 335x18. It took some tuning on ride height and shocks but we picked up 1 second on the 32 second test course that AAS rents out at Crows Landing.
The car is pulling 1.4 G's on street tires now so we are pretty happy. The splitter gave us enough front down force to make Bridgestone 275x18 RE-71's work very well. The brakes are much better with the new rotors in terms of decel and modulation too so if we fix knock back we should be good. The car is so good now that in the actual event I straight timed last years Goodguys overall Champion by .5 seconds on my first run and as most of you know I am a very old man. Scott got him by 2.6 seconds so we are going in the right direction. The car needed a ride height adjustment so it can be faster yet. All in all a successful weekend. We are going to check alignment and corner weight it before heading to Nebraska on the 2nd of September and add about .030 rear toe in. The splitter I made bolts to the two quick jack adapters in front and to the front sway bar mounts at the rear so it does not require any body modifications. We do have to raise the car to install it though because it has tire air deflectors.