I can't comment on BD's but I have about 900 1/4 mile passes and over 60,000 miles on Rips (Source Automotive) twins. I have a 62/14 and a 75mm S400, and they have not been off since I put them on. I dyno'd 634hp and 1283 ft. lbs of torque, with a drag comp and mach 6+'s. EGT's at the end of a 1/4 on a 100 degree day are about 1350*. Max boost I have tried is 72lbs, but I normally run 62-67lbs. I don't know how much hp you could make, but I know that after I launch, my runs are pretty much smoke free.
I hope this helps...
Paul