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750 HP holley carb #236509
02/25/09 11:26 PM
02/25/09 11:26 PM
Joined: Jan 2003
Posts: 499
Gettysburg Pa
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roadrunnerreds Offline OP
mopar
roadrunnerreds  Offline OP
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Gettysburg Pa
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.

5053556-IMG_1089.JPG (93 downloads)
Re: 750 HP holley carb [Re: roadrunnerreds] #236510
02/26/09 11:19 AM
02/26/09 11:19 AM
Joined: Oct 2003
Posts: 339
Wisconsin
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BIGS Offline
enthusiast
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Wisconsin
Hello Brad.....your carb should have somewhere in the .070-.075 idle bleeds and .033-.036 main bleeds.....Jesse @ BIGS!!


Jesse & Lynn BIGS Performance Products Building Street/Strip Carburetors since 1974 www.bigsperformance.com
Re: 750 HP holley carb [Re: BIGS] #236511
02/26/09 03:50 PM
02/26/09 03:50 PM
Joined: Jan 2003
Posts: 499
Gettysburg Pa
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roadrunnerreds Offline OP
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Gettysburg Pa
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

5054958-IMG_0359.JPG (79 downloads)
Re: 750 HP holley carb [Re: roadrunnerreds] #236512
02/26/09 05:55 PM
02/26/09 05:55 PM
Joined: Feb 2009
Posts: 1,532
off the grid
340B5 Offline
pro stock
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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.


Yeah, it's got a smallblock.
Re: 750 HP holley carb [Re: 340B5] #236513
02/26/09 06:14 PM
02/26/09 06:14 PM
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383 Offline
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Marysville, O-H-I-O
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


**Photobucket sucks**
Re: 750 HP holley carb [Re: 70Cuda383] #236514
02/26/09 06:20 PM
02/26/09 06:20 PM
Joined: May 2004
Posts: 12,379
Taxes & Virus's R-US, NY
Dragula Offline
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Posts: 12,379
Taxes & Virus's R-US, NY

5055345-AirBleeds.jpg (83 downloads)

'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: 750 HP holley carb [Re: Dragula] #236515
02/27/09 10:02 PM
02/27/09 10:02 PM
Joined: Feb 2009
Posts: 1,532
off the grid
340B5 Offline
pro stock
340B5  Offline
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Joined: Feb 2009
Posts: 1,532
off the grid
The one you have circled there is for annular boosters, you need the next one up.


Yeah, it's got a smallblock.






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