my holly 750 carb gives no pull once i get out of 2nd.....so i have my 650 on it now.....i have no idea whats up with it....ive also never messed with a carb in my life

 

holley....well i have done some reading and i think thats its the spring in the vac... thing.
does that sound right?[&:]

 

You should have between a 750cfm and an 850cfm carburator on most any street 440 combo, a 650 will be restrictive on that large of an engine.

 

ya i know that but the 650 is all i have that wrks right now.....and its kinda still my new car so like anyonei gotta go show it off at school....i really want to fix the carb though

 

OK, is this a 440 HP motor or a 350 hp out of a New Yorker? The 350 hp motors had 520 cfm Holleys in 1970 so I'm thinking thats what you got. The 440 HP motors had 750 cfm AVS Carters.

 

no its a 440 but the idiot before me f***** up the 750 that was on it so he put a 650 because it was all he has......today im going tojegs to try and buy a 800cfm carb....but how much will this affect gas mileage?

 

We know it's a 440, but what is the HP on it? What year is the motor?

 

i already had alot of trouble with this question....but im pretty sure its close to 500 but they gave me hell cuz i havent had time between school and work and working on the car to get it dynoed.....so how much would it affect the gas mileage to switch from a 650 to an 800

 

yet again i have discovered the power of myself.....and i think this forum is dead. or is getting close

 

I have an 870cfm Carter AVS from a '68 440 HP motor (I ran the numbers on it to find out what exactly it was and what it was from), it was on the '73 400 HP that was in my Roadrunner when I got it. It currently is sitting in my tool box and I have my Holley 750cfm double pump on the 440 that is currently in my Roadrunner.