Originally Posted by
chasingthepack
the t4-14 is a better all round car as it works well in all conditions,the bd7 appears to only go well on med to high grip,a few have tried to run the bd7 in the winter champs and failed and changed brand,at the last meeting a very good stock driver with a bd7 was beaten by a t4 13 and a t4 14
it was around 8c track about 6 started damp and dried out,at my local track the bd7 only does well in the summer
Most the guys with the bd7's have gone to ball diffs for outdoor winter racing, seems to transform the car, the car seems to locked in with the gear diff, even with really thin diff oil. The ball diff really seems to allow the car to rotate a lot more. Still doing well with my t3 2011 though, also with a ball diff :P