750 HP holley carb

i wanted to see what air sizes are in your 750 hp holley.i put a 750 hp holley street carb on my 360 and i was wondering what size air bleeds are in the other 750 hp holleys Brad.

Hello Brad.....your carb should have somewhere in the .070-.075 idle bleeds and .033-.036 main bleeds.....Jesse @ BIGS!!

Bigs i think the 750 hp carb i am using might not be calibrated for my engine.i have a 360 .040 with eddy heads 63cc(10.17-1 compreesion) crosswind intake MSD distributor mechanical advance 14 degree intial 36 total timing tti headers. about 4000 converter in a 904 with CRT valvebody dana 60 with 3.73 gears.i am thinking i should used a regular 750 hp carb instead of the street version 750 hp. Brad

BIGS is pretty much on target. I did some tuning on my 750 last year and ended up with .072 idle on secondaries,.073 front. HS bleeds were left @ .036. Every combination is different, but the more cam you have, the more initial spark advance and more fuel you need to feed it @ idle. Try the Barry Grant website, they have lots of tuning info.

my 750HP (the one with no choke, double pumper) was dead on for my almost 440, eddy headed big block. it was just a touch lean at WOT, so we went up 1 size in the rears for insurance to make sure it didn't go lean on the street.

we didn't touch the idle circuit at all, and it idled great at 700-800 rpm, AFTER the engine was fully warmed up!

however, I'm thinking i need to upgrade to a 50cc pump shot, because we didn't tune off idle response, they slowly brought the rpms up to 3,000, started the dyno pull which lugged the motor back down and they slowly gave it WOT, so we never really tested WOT from idle, and it's got a bit of a stumble that I can drive around by feathering the throttle (and pumping more fuel)
or waiting till I'm rolling around 20 mph with 2000 rpm or so before mashing it.

I'm just too cheap and haven't gotten around to it yet

The one you have circled there is for annular boosters, you need the next one up.