Street Demon vs AVS2

qkcuda said
I am thinking about my next build which will be an economy/performance 383 hopefully for a first generation Charger. The cam will likely be in the 210-220 range with low end torque more important than high end horsepower. I want a comfortable cruiser, that will get decent mileage cruising, with say a 2.94 gear, or possibly an overdrive. I like the looks of the 625 Street Demon with the composite body. It has small 1 3/8 primaries and the single large secondary blade. I have read good reviews on them. lately I have also been reading a lot of good things about the new 650 AVS2 with annular discharge boosters (the SD has conventional boosters). It also has slightly smaller primaries than secondaries. Any thoughts or real world experience with either?

I have the AVS650 on my 418 stroker for street driving. It has performed very well. I have not experienced any off idle skips or Boggs. I’m running the 6psi edelbrock mechanical fuel pump and a wide band O2 sensor. Before installing a pressure regulator I had inconsistent A/F ratio readings at idle and random idle speed variations. Looks like the valve on the Foats allow fuel to leak past and cause the erratic A/F and idle issues. Don’t know if engine bay heat and no fuel retuen was causing the fuel over-pressure conditions when the fuel got warm. I saw as much as 9psi on the fuel gauge between the fuel pump and the carb before installing the regulator.