I'm new to Forced Induction and want to learn more, here's a few comments:
Which Holley 2300 are you using 7448-350CFM or 4412 500CFM carb?. Do you use an AFR gauge?.
My
supercharged 250 blow-thru setup started with a 500 cfm 4412 and I could not get near a good AFR. The AFR was way too rich with the 4412 and typical 'H18' mods. I had no success with enlarged PV ports . Now AFR's are getting closer to 'Stoichiometric' levels with a 350-7448 and incrementally smaller main jets. currently running '62' main jets, 7448 has blow out protector sealed for bowl-pressure boost-ref Power Valve and some 'Hangar18' type sealing mods. My cruise and WOT AFR's are very good @ 14:1 typically but still idle/low speed is a little fat @ 12:1 . I have Ignition locked @ 28 degrees @ full , Elec fuel pump and carb hat boost ref' fuel pressure reg.'.
I made no progress tuning until I added a fuel bowl vent extension @ 4" into charger tube. Without extension carb would run OK until boost then swing from lean to rich, load up and sputter.
I'm running @ 5-8lbs boost max with the Vortech SC, previous 250 with T3 turbo didn't like 15-20 lbs boost capability - the piston lands blew off with a plume of oily blue smoke across my windshield ...
Have(
boosted) Fun