Comparing this dyno graph to the GTX2860 car Greg dynoed a while ago, there is no reason to use the GTX2860. Granted there are a number of variables, but I would like to see more cars with these turbos to get more accurate numbers. Comparing the GTX 2860 vs. GTX 2867, they both have similar spool-up (Power Curve) yet the 2867 yields about 80-90 more HP with pump gas. BUT, when Greg used Q-16 the GTX2860 peaked at 594 which is basically what the GTX2867 did with pump fuel.