Two barrel or four barrel for Az's Aluminum head

[Anlushac11]

8)

For a autocross or roadcourse enviroment in a hot rodded car what do you think would be better, a four barrel carb or a two barrel carb?

Which would be better for a blow through turbo setup? 4bbl? or 2bbl?

Not sure which one would be preferable.

The setup would be a 2500-2700lb car, manual trans, high numerical gears, Az's aluminum head, headers.

Turbo setup would be similar.

I agree the EFI setup would probably be best overall but assuming cost is too high and we have to resort to carbs.

Your opinions please.

 

[Anonymous]

For a autocross or roadcourse enviroment in a hot rodded car what do you think would be better, a four barrel carb or a two barrel carb?

EFI. Carbs don't usually like sideways G's.

Which would be better for a blow through turbo setup? 4bbl? or 2bbl?

I prefer the 2 bbl.
When you blow through a carb, it is MUCH easier to tune if its on the small side. Big carbs and boost don't mix well.

 

[fast64ranchero]

This is just my 2 cents, I was going to put a 450CFM holley manual secondary carb on my new engine, then I got thinking about tuning, how would I tune both sides, (primary and sec.) and keep all cylinders running even, (no lean or rich ones, remember lean = det. which = blown head gaskets) I think for ease of tuning, go with the 2 barrel carb on the 4 barrel intake

 

[Anonymous]

Also, IIRC the 450 mech was designed to be run as pairs on a tunnel ram, usually with engine that have massive cams and very little vacuum. You would have to modify every circuit in the carb to not have it majorly rich at all times.

A Holley 350 under boost is good for about 450 HP, how much more do you really think you will be neeeding??