With low boost and no boost cut controller you hit 120mph? It's a while since I've looked at what people run at the track but 120 sounds high.
In any case, without a boost cut, the car shouldn't die...it should just hit fuel cut each time. I doubt a clutch has much to do with the car dying.
In any case, without a boost cut, the car shouldn't die...it should just hit fuel cut each time. I doubt a clutch has much to do with the car dying.