jp and steve...
originally si had a quiafe helical box with a brace, that lasted well, no cases exploded, one cracked at the bell housing but the cryo'd case lasted and is now in malta on trips car, i guess still in one peice.?
next he went with a straight cut 1-4 ppg dogset, cryo'd case, no brace. This gearset utlised a standard mainshaft and final drive, these were also cryo'd. That box lasted 2 runs, spat the mainshaft out the end of the case, usually its the input shaft bearing seat that goes, that was still intact. This would have you thing that it was the helical cut that loads up the case as it was only on that shaft and ring gear. ???
we now have straight cut everything, (input shaft, gears, final drive). will probably use an external brace aswell, the cases are cryo'd and theres a couple of other trick things going on with mine.
Also thought needs to be put into how the clutch is used on the initial launch, side stepping it is only going to end in tears, simons ppg didn't break on the launch, it actually broke going for 2nd, whether it cracked on the launch we will never know.
Loading the car up on the brakes/handbrake will help take some of the shock out of the launch as will using a clutch that can be slipped slightly.
I guess we'll know for sure if we've finally cracked it when i finally get my turd finished...
