[Stitch]

Originally Posted by 2012LS3VERT

In the above pic, the top is stock, the bottom left is a Bo White, and the black one is a Vmax. Is ended up swapping back and forth on the dyno, then on the street. I wish I had definitive numbers, but I had what seemed to be belt slip issues after 4500 rpm. On my stock TB, fully tuned run, I was at 540HP/560TQ with 11.17 PSI peak boost, and 9.66psi at 6250 rpm. We swapped to the BW TB, and then retuned, as it leaned out down low (indicating increased airflow). Then another pull, and gained 3 lb/ft at peak TQ, but lost some HP due to what seemed like belt slip. On that run I was down to 10.7 PSI peak, with 7.73 psi at 6250 rpm. So almost .5 psi less peak boost, and almost 2psi lost at 6250. Finally, we switched to the Vmax. It richened back up down low, which seems to indicate a little less airflow. It peaked at 11.31 psi boost, with about 10psi at 6250. With the higher boost numbers I was back up to 543 HP and 563 lb/ft. If I was getting those boost numbers with Bo's TB, I bet I could have bested those numbers.

Drivability wise, I can say with the Vmax vs the BW, the BW takes a big steaming do-do on the Vmax. I pulled over and switched back and forth. It confirmed on my Wideband that it is a little leaner with the BW than with the Vmax, which I interpret as increased airflow. I am going to have a much harder time keeping tires on this thing with all this throttle response!

That's some great info 'Vert. Thanks for taking the time to do the comparo and posting the results.