Russ's car had a G50 that is nearly as developed as the motor, I suspect that will be going into the new car
Richie Webb uses IRS in his faux early cabrio. He's lost faith in the T1 box it seams, T2 now I think.
I'll bet Germanlook.coms Marco (steam engine) has IRS aswell.
These are proper street cars, all turbo and in the VWDRC pro-class, There isn't too many 'full-race' cars going any quicker...
Berg took a good look at drag racing with IRS, somehow he used to throw circlips!! I may copy his method of securing the output flanges to the sidegears. Simply an M10 bolt and a washer, shaped to fit the bowl in the centre of the flange. Brilliant..
T1 CV joints just can't cope, one fix is T181 output flanges and T2 size CV joints. Better still, 944/411 CV joints with the thicker 944 shafts.
I fear my weakest link is the T181 output flange. If this fails maybe the 944 driveshafts will be to blame for lacking in any 'give'. The splines on the T1 IRS are stonger than the spiders in the stock diff.
Have you looked at the cost of a T2 'box built for T1 drag racing? ouch!
Porsche 5speed must be a factor to consider.
I have seen a sheared T1 IRS ZF output shaft, that had me really worried..
Matt