Mine didn't run bad at WOT, had a very nice a/f through. I only had 2 complaints with it. When trying to spool a larger turbo it was always fat at part throtle and could never get the a/f lean enough to get alot of turbo speed. And the first time you make a pass with fuel injection and get to see and use all the data from the pass, you will wonder why you ever spent money on the carb. IMHO Having both, I would never put a blow thru on anything again, just being able to change anything you want with a few key strokes is flat out awesome. In other words the carb worked great, ran good but the fuel injection is just leaps and bounds better.