I pore over every forced induction post mining for hints on my own
FI projects, here's a few thoughts and related pics on this post thread '
Wondern' if you are using vent tube extensions?. My 250 with Vortech SC (@5-8 PSI boost @3500rpm) and blo-thru 2300's was erratic at boost until I extended carb vent tube into charge tube @ 3". Engine would oscillate from good AFR to lean after a few seconds under boost until xtension tubes added, extensions may well be worth a try ... (3/8 fuel/brake line fits stock vent port)
250 SC project started with 500CFM 4412 but tuned to optimum AFR's finally with the 7448 350'. As boost was incrementally increased with blow-off relief valve adjustments' , the AFR;s would go rich until I backed down main jets repeatedly. I bored the 2300's exiting unused hat-tap pass through casting for direct hat pressure port for regulator reference and Power Valve port remote access but instead currently using bowl pressure referenced 'reverse' Power Valve setup. Jet extensions are also helpful when fuel weight hysteresis vs acceleration is a factor. 8)
Car uses elec pump, OEM fuel supply line with 3/8 return to tank filler tube. Aeromotive reg' set @ 7 lbs at atmosphere, increases linearly following boost to @15PSI.
('if
Photobucks allows
on NA test mill:
Maverick test platform
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gauges are boost at compressor-AFR-boost at intake manifold
The setup is fairly simple and car is a docile driver at NA/partial throttle cruise. At usable RPM, the SC enables instant available boost when throttle is opened.
Have fun