what cfm should i run

[funnycar]

451 stroker
aluminum heads
10-1
727 headers
torker intake
street use only

 

[rumblefish360]

Gear ratio, tire size and stall converter would help a lot. What wold also really help are the cam and it's specs. Otherwise, the cfm can float from (My choice) 750 cfm up to a 1,050.

 

[moparpoor]

I run a 1000 holley hp with Indy cnc ez heads,full roller valve train,4.30 gear and 29.5 tire.It works very well.

 

[SUPERSTOCKRACER]

i ran a chuck nuyton 850 holley with the same combo

 

[FatJack]

2 1050 Dominators, better to be prepared...:3gears::3gears:

 

[funnycar]

cfm

325/50/15 m&h
3500 stall
373 gear
mech cam 557 lift c l 110 duration 296

 

[moparpoor]

Go to holley"s web site they have a program to help with carb setup.You will probably need an 850cfm,they will call for vac secondaries.Go with 850 hp with mech secondaries.

 

[daredevil]

I run a 1000 holley hp with Indy cnc ez heads,full roller valve train,4.30 gear and 29.5 tire.It works very well.

your set up sounds a lot like mine only my gears 4.10. How much converter ya running?

 

[daredevil]

Screw Holleys site. Check out Diamondbacks white pages.

 

[daredevil]

This is a carb formula stolen from Diamondback. I hope Damon doesnt show up at my door with a mean look on his face. Get the proper carb for your vehicle- undersized carbs, while great for response will be dead at the top end, run richer as a rule (excess velocity causes main circuits to come in wrong) and usually get worse mileage. Oversize carbs (especially vacuum / air secondary type) will have an untunable low end bog, lazy acceleration and nearly impossible idle problems. Somewhere in between is what we are looking for. A simple equation to get you close : ((Max rpm X CID) / 3456 )X V1. V1 is a variable representing the efficiency of your engine . Use .85 for a normal street engine, 1.00 for a fairly stout street engine ( we're talking close to strip car here) 1.2 for a highly modified strip only vehicle. (Yes< I know these are not the same numbers as some books show, but they work for these carbs) BE HONEST (you don't have to tell anybody) -along those lines do not use 7600 for the rpm on your hydraulic cam 8.5:1 street engine.

EXAMPLE: 440, hydraulic street , 5800 max rpm. ((5800 X 440)/3456) X .85 or ((2552000)/ 3456) X .85 or 738 X .85=627 or a 625 440, 620 lift mechanical, 6800 rpm max ((6800X440)/3456) X 1.00 or ((2992000)/3456) X1.00 or 865 X 1.00=865 or 800 (biggest) or 2 X 500

 

[funnycar]

cfm

3500 on the stall

great input

thanks

 

[moparpoor]

your set up sounds a lot like mine only my gears 4.10. How much converter ya running?

10.77 124mph and still tuning,race weight at 3700#.I haven't run the car since.michigan weather is sticking it to me.

 

[SUPERSTOCKRACER]

i'm sticking with mty answer 850 hp holley.
if tyou go with an edelbrock get the 800 series performer. i like them the best for my race car but i run 2 of them.

 

[rumblefish360]

After reading da'specs...

850 double pumper

 

[shag766]

After reading da'specs...

850 double pumper

x2