Time for a little update...
Decided to bump the boost on the BBSC by going with a smaller pulley and doing an aftercooler setup. I had 3 pulley sizes with the kit and always assumed they were 6 lb, 9 lb and 12 lb as these were the most common back in the day. Well jokes on me as I thought I would be going from 6 lbs to 12 lbs by jumping to the smallest pulley I had on hand but turned out it was only 9 lbs. So why anyone would do an in between size is beyond me. Ah well, I will run like this until I get the urge for more power and have a smaller pulley made then.
For reference the three pulley sizes I have are measured from top of rib to top of rib. Also, my OEM crank pulley while modified by TiDave to be a 6-rbi is still stock diameter so nothing is overdriven/underdriven on my setup. Same with the alternator pulley, just replaced the OEM 5 rib with a same diameter 6 rib. The pulleys that drive the BBSC carrier shaft are:
3.455"/87.77mm - 9 psi using belt 6PK1690-665K6
3.592"/91.24mm - guessing 8 psi as I haven't used this size
3.921"/99.61mm - 6 psi using belt 6PK1715-675K6
Apparently not a lot of info out there for engine size, pulley size and aftercooler results for the BBSC. Notice that the boost/power ratio followed the "go by" 1 psi:10 hp ratio. I was hoping for more but I don't see any signs of boost leak or belt slippage, so it is what it is I guess. At least, I will be on the safe side with cooler air temps now that I am aftercooled.
Also thanks to DDozier for the sweet aftercooler setup. I picked up his prototype which is super slick. Check out a description at the below thread.
http://www.nsxprime.com/forum/showth...=1#post1588965
And one more shout out to 96cxt (Rahim) who did all the work. Thanks buddy. So glad to have a local friend and NSX owner who actually has a BBSC setup himself.
3.2L, 6 psi pulley, non-aftercooled - SAE 331 hp / 230 tq
3.2L, 9 psi pulley, aftercooled - SAE 360 hp / 251 tq