Mike, my wipperman chain has lasted at least 4 times longer than the gold DID chain. You still have to be very careful with the alignment of the sprocket, as the wipperman will chew up the rear sprocket if it’s off of alignment. I had a problem with my rear axle moving when I ran the Max weight of 400 lbs. This moved the rear sprocket off center and I could go through a normal chain in 50 laps. I put on two axle collars and the problem went away, but it also stiffens the setup on the rear.
Two things I do for chain life is first I align the rear sprocket up with the engine sprocket with a straight edge. The second is what Glen Cario told me, which is after every day at the track I take off the chain and spray it down with brake cleaner and then drop it into a coffee can with motor oil and let it soak for a few days. I think it was Jay who told me he does the same thing, but he actually heats the can up so the oil can penetrate into the chain links better.
The composite sprockets work great, but during a race I usually drop the right rear off the track at least once, and that’s all it takes to strip off every tooth on a composite sprocket.
One last point, if you’re sprocket teeth aren’t in great shape, throw it away. That’ll stretch out a chain faster than anything else.