502 with 10-71 blower/intercooler twin 750 carbs on top. Jet size is 74/84 with 4.5 Power Valve. Set timing on stand, installed in boat and when in gear at 2800-3200 engines will flood out. PV is not boost referenced. 7 psi at the regulator. A1000's feeding aeronotive regulators....I'm no carb expert and am thinking my PV are set to low? Any help is appreciated

Just curious, and have no clue, would that motor ever see vacuum with a Roots style blower

I'm not sure, my next step is to hookup vacuum gauges above and below the blower to get an adequate reasing

Tell us more about the 502

Nothing fancy, worked 088 heads, stock cam, dry tails

Get hold of Dean Nickerson in Bristol PA. He is a blower carb guru

He's on my call list for tomorrow

explain flooding out ?

Thats a big blower for 502 displacement, what exhaust are you running

with non boost referenced carbs i use a 9.5 or 10.5 power valve.how far out are you idle mixture screws?