Carb size
 

ok...my buddy wants an opinion on carb size. Just a general estimate. Shooting for 700hp with dart heads (steel), (big block). I said a Holley 950 HP double pumper. Your opinions please ? Thanks.

950 or a 1050

What size motor?

How many cubic inches ? How many RPM's is he planning on turning? I would still think at least a 1050 Dominator.

565 ci....gonna turn it to around 5600 rpm's. Generally a medium roller cam, single plane dart intake. Doesnt wanna get too radical with power.

+1 and they are easy to find! 1050 dom easy to tune and parts are readily avail.
Or you could jet the he!$ out of that holley too.

Remember Holley HP 4100 series do not flow the same numbers as the 'regular' series. For example, my HP 1000 flows about 870cfm...

Holley just introduced a new marine CG approved 1050 2-circuit. It should be spot on.

a 1050 for sure....don't be fooled a holley 950 is NOT a 950 cfm....

My 1050s work well with my 540s.

See my post here about gains with a 4150 to Dom conversion...
Go with the Dominator...
http://www.offshoreonly.com/forums/n...y-results.html

The old school rule is 2 cfm, for every 1 ci. Example 500 ci motor you need 1000 cfm carb, or 1050.

You can make that power with an 950CFM 4150 flange carb and be a little more fuel efficient and have better mid range.

Most guys go with Dominators, and they are acceptible, but they are overkill for that amount of HP. I have done done both carbs on the dyno and switched intakes and the top end numbers are the same. The fuel usage is a little less on the 4150 carb and the mid range numbers pick up faster.

Either way the carbs and the intakes are about the same price. Flame arrestor may be a little more expensive with the Dom.