More Dyno #'s
http://www.unorthodoxracing.com/dyno_maxima_2002.html
I know this is a Nissan, but it is an NA with similar setup as 3S NA's . There also are many more #'s posted as well.
As far as the 3SX pulley, here is what Unorthodox says about pulleys:
"Unorthodox Racing lightened underdrive crank pulleys on average can provide gains of 5 to 12 HP and 4 to 8 lbs.-ft. on normally aspirated engines and 8 to 16 HP and 8 to 18 lbs.-ft. on forced induction engines. Higher gains are possible. For example, a Nissan 300ZX twin-turbo saw gains as high as 37 HP and 45 lbs.- ft. on the dyno just by replacing the stock crank pulley with our Ultra S lightened underdrive crank pulley.
Power gains are obtained in two ways. First, and most important, is the weight loss. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of our gains are from weight loss.
The rest of the gains are from underdriving, which accounts for about 15% of the total gains. We do not push underdriving for two main reasons. Our main reason is to keep charging systems, air conditioning, power steering, and water pumps moving fast enough for every day driving. Second, not much horsepower is gained from extreme underdriving. In most applications all of our underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximum weight loss can be achieved at the crank where most of the horsepower gains are found."
Hope this helps to clear up some issues as far as HP anyway and 3SX's pulley
Steve