FAZ442

I have a 1968 442 olds with a 400 engine that has been bored 30 over with a th400 trans and 373 gears in the rear. what would be the best carburetor for this car? I currently have an edelbrock 750 model 1411 but am not very impressed with it.

Fakser

If your not very skilled with tuning carbs get the 600 cfm model 1406 w/electric choke runs good out of the box. If you know the ins and outs of tuning go with a Holley 600cfm.

380 Racer

I would use a 750 vacume secondary. Too many cubes for a 600 IMO.

bigD

i completely agree with 380 racer. give us more details about your engine, cam, intake, headers? that sort of thing...
truth be told a well tuned Q-jet is a great carb but they aren't as easy to tune as a holley... if you have a squarebore (aftermarket) manifold i'd say keep tuning on that AFB, they are good carbs. if you are running an adapter on the stock spreadbore intake i'd go to a Q-jet and ditch the adapter

FAZ442

The Engine has been bored 30 over like i mentioned and Im currently running the stock manifolds but plan to upgrade to some headers as soon as i get the extra money. Other than that it is pretty much a stock car but I want a good performing carb that I could take to the track every now and then.

oldcutlass

What intake are you running currently, and what is your engine doing or not doing that your unhappy with?

Tony72Cutlass'S'

agreed, fullstop.

A bigger carb is not always the better solution.

I also have a 1405 on my 350 rocket, it runs like a dream. Mechanical Secondaries. AND it seems to burn pretty clean. I havn't jetted it yet, its running like this out of the box.

FAZ442

I have an edelbrock aluminum intake manifold and the car hesitates when i floor it. it doesnt necesarily hesitate in the begining but once it is running about 40 to 50 it is hesitating as if it is not getting enough fuel.

MDchanic

So maybe your carb needs to be rebuilt and adjusted.

Any more details on the hesitation?
Throttle positions affected (or only when floored)?
Does it catch up and then go fast, or does it bog until you release the pedal and try again?
Does it act like it wants to stall?
etc.

- Eric

FAZ442

The carb sounds fine when i accelerate it in park. but when i run it hard it bogs . I just rebuilt the carb a month ago. could it be something else?

It bogs until i release the petal.
does not catch up

MDchanic

Fuel pump?

- Eric

FAZ442

just replaced fuel pump a month ago too

oldcutlass

Could be advance plate in distributor binding, timing,... There is an adjustment for the acellerator pump. Watch the video.. I've had no problems running Edelbrock carbs over the years. They are usually pretty reliable.

http://www.youtube.com/watch?v=Kw-8l...layer_embedded

m455sx

Have you contacted Edelbrock? May need to change springs in carb. I also love the edelbrock.