Who's The Boss? Stock LS3 Intake vs Performance Designs XS on the dyno!

In this video we do a direct comparison between the Stock LS3 intake with billet 95mm Holley cable throttle body and the new Performance designs XS intake with 103mm Nick Williams DBW Throttle body. The Car is the Custom Works 71 Camaro. The engine is a LS3 based 416, with Scat 4" stroke rotating assembly, Trick Flow GenX 255 heads and Comp cam 54-471-11 (239/255 @ .050", .624" lift 114 LSA. No changes were made to the tune including timing, which as 26* at WOT, and fuel which was 12.6:1 @ WOT. A Holley Dominator with Holley V6 software was used. We found no appreciable gains in power, except at 6000-6500, but I may attribute that to windage issues that we resolved between tests, which might had affected peak power with the stock intake. Performance Designs intake lost a heafty 20 ft/lbs of torque from 3-5000 rpm and 15 hp in the same area. I'm currious to see if changing the throttle body to a smaller size brings that mid range power back. that will be in part 2. Thanks to Chassis Dyno Solutions of Chico Ca for letting us use their dyno. we also did a follow up video with this manifold testing a 92 vs 102 throttle bodies    • 92 vs 102 what size throttle body is ...