Carb Recommendation

[Taylorman]

Looking for opinions on carbs for a BBC single carb. Its going to be a 454 .030 over, single plane intake, pump gas compression around 10:1, not sure of cam yet, looking to make about 600 hp or so, thinking about 5500 max rpms. Undecided on heads yet, probably Canefields. My pick at the moment is a BG Mighty Demon 850 with annular boosters.

[victorfb]

cam selection will be the best determination on carb. talk with demon (BG fuels) and ask them about duration specs. the 850 mighty demon may work just fine for you. just dont go over thier recommendation on cam duration.

[NELSON#109]

its hard to over carb a jet boat. 950 hp!!!!!!!!!!!!!!!!

[Taylorman]

its hard to over carb a jet boat. 950 hp!!!!!!!!!!!!!!!!
Is that Holley 950 HP?

[Liberator TJ1984]

Yea I would go with the 950 also and it is probably only a few more bucks than the 850....
I too feel it is hard to over carb a jet .... :D
I am running 2 Dom.1050's on stock bore 454 :notam:

[Bear-ly jetting by]

I put the BG Mighty Demon 850 w/annular on my BBC and i'm very pleased with everything about it.

[BK]

I put the BG Mighty Demon 850 w/annular on my BBC and i'm very pleased with everything about it.
What intake are you running?

[Bear-ly jetting by]

Single plane Holley Strip Dominator.

[NELSON#109]

i ran a 461 chev, with closed chanber square heads, victor jr, and a 950 hp. somwwhere between 500 to 575 hp. it was in a challenger 18.5 jet. it was never to much carb. i would never gone w/ anything smaller, but could have got away w/ a dominater 1050.. like i said its hard to over carb a jet, but easy to go to small. good luck...

[Taylorman]

What makes it hard to over carb a jet boat?

[bruleracer]

cibic inch x rpm divided by 3456= cfm, with the asumpion
of 100 perc volumetric eff. =733 cfm. the standard for testing 4 brl carbs is 1.5 in of mercury. so add approx 100cfm for the preasure differance. assume a 12 percent
loss in air flow because of fuel displacement (add 12 perc)
and you have, 932 cfm, may i add, every demon carb
weve tested flows more than rated, an (850) mighty demon sounds perfect. plus you get changable air bleeds for a carb that cost about 500 when a holley cost about 700 for the comperable carb,,,, 850 mighty demon
good choice.

[68 hallett]

i use a holley 870 vac secondarys and i very pleased with it.