Originally Posted By 4406bbl
Originally Posted By Cab_Burge
If I'm remembering correctly all the Holley 650,750 and 850 Double pumpers series carbs. all have the same size throttle blades and venturi boosters in both the primary and secondary sides so the mixture will be equal on both sides of the intake manifolds at WOT work scope
I would call Quick Fuel, Pro Sytems, Thumper Carbs and any one else you would like to talk to for more information on size, price and when they can delivered the carbs to you twocents scope
I haven't mess around with a lot of tunnel ram motors but every BB 440 Mopar motor I have swap to bigger carbs, heads, camshafts and exhaust system all went faster at the track, all of them up
Same thing on a engine dyno tests, more air and fuel = more power devil


Pretty sure the 4779 750 is the only one of the 1-11/16 bladed double pumpers that had the same front and rear venturies. 850 also does but is 1-3/4 blade.


You would be correct. the 650's have different sized primary vs. secondary venturi's

And no modern main bodies that I know of come with even close to the correct size bleeds. most carb builders revert back to or very close to earlier bleed/emulsion combos in most cases.

Last edited by Harry's Taxi 2; 02/06/19 10:08 AM.
'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.

NOS-used when losing since 1940.