tim72

I am running a 1411 edelbrock 750cfm carb. with a 455 bored 40 over and edelbrock heads. I believe I need about 825 to 850 cfm. Can I make adjustments on this carb to achieve it? No Carb sight so I put it here.

Tim72

88 coupe

No.

Norm

tim72

Norm what would you sugest for a carb then? I am running a performer intake. I have a rochester? Can I get the cfm from a Rochester?

Tim

tim72

I guess the only way to know if my 750 is to amall is to try another carb at the track?

Tim

442scotty

What makes you think you need more carb?...I have the same carb on my 455...040 over 9.5 -1 pistons...No edlebrock heads but C heads all done up.

I had to lean mine out...too rich...they are adjustible with jets and rods in a kit...if you use a air fuel guage for the adjustments you can get it to run real nice...Mine is awesome ...

tim72

Found a problem with the accelerator pump. It was torn. Guess the ethanol doesn't do the rubber any favors. Still a lot of folks say the best carb is either a Rochester or Holley.

agtw31

you could find a Buick 800cfm quadrajet,and have it built by your specs.

cores are around for $50-$60,it would run you some change to have it built right,though.

tim72

Thas what I am looking for. Actually any early 750's will run ok if rebuilt correctly from what I hear.

64Rocket

800 or 850 Holley is the way to go. Easy to tune.
Make sure your fuel pump can supply the sys. you need 5 to 7 psi fuel pressure.

Gene

tim72

Gene,
Looked into the holley and the guy there said the Holley 750 hp or avenger 770. I have not heard a lot of good things about the avenger. So go with a mechanical ?

Tim

citcapp

I run a Holly 770 avenger on my 455 10.5.1 compression edelbrock heads full roller cam, rockers. Runs hard no hesitation. Its all in the carb tuning no matter which way you go