Cerbera V8 clutch drag

Hi Guys,
Yeah, I know, only my fourth post and I demanding help... lol

I'm an avid GTR2 fan and have a number of years messing with the cars and generally enjoying the hell out of the game, however, there's help I'd like from anyone in the know on several subjects but I won't pester you with a list of problems, I should perhaps knock one out every so often as I only remember when using them... yeah, getting old!

I have SCCA's Cerbera mod and have a V8 fitted to the Dark Dog one (the nearest I could get to the Michael Saunders car) to use as a 'Club GT' around 500 hp so a similar amount to the speed six, but on standing starts the car just sits burning the clutch (no smoke just slip... not wheelspin) and gets beaten by a couple of rows till it comes together, is there some numbers like initial torque or whatever I should alter in the HDC to allow it to get off the line properly?
As an aside I don't seem to have this problem with other cars I've 'massaged'

Thanks in advance...


Pete