[urban_cowboy]

Excellent. Do you have one? Do you know if the metering blocks have adjustable emulsion and IFR? They are talking about a small venturi, large throttle plate, 830cfm carb for my setup. They say it will not need off more than 2 jet sizes and air bleeds, etc should be dead on. Very interesting and very affordable compared to other performance carbs and they get you very close to on target based on flow data and experience. I am having good luck with my 4150HP but not without its quirks. They talk bad about the stock HPs and make a good point for running a custom carb vs. a Holley HP carb.

You mention not running right on the street. I wonder if they speced out their engine correctly as you said and also if they know enough to tweak the jetting and idle for weather changes. As you know, there is a big difference between a carb being tuned correctly for WOT and one that is good through the whole power band and entire throttle opening range. For that reason, I asked Pro Systems what would be best for a street rod/amateur race car (Pro 4160 drag carb or the street race carb). Honestly, I do not know the difference at this point.