Annular 4bbl for boosting?

[350kmileford]

Does anyone know if there's a 4 barrel, annular discharge style carburetor that would work for a boosted (supercharged) application? I'm basically looking for one with mechanically-operated secondaries; with a cfm rating between 350-500.

OR

Is there any way I can get away with using one of the vacuum secondary Autolites available? I doubt there's a modification I can perform..

OR

Is there a way to convert the venturis? I saw some kits while searching, but they seemed to be for very large flowing carbs only. Would it be cost-effective to have them changed?


One other question. This carburetor is listed as to be used on a circle track. Other than the lack of choke, can anyone tell me why they would say this?
http://www.holley.com/0-80507-1.asp
http://store.summitracing.com/partdetai ... toview=sku

 

[Army of Six]

is 575CFM too big????

http://cgi.ebay.com/ebaymotors/MIGHTY-D ... dZViewItem

 

[350kmileford]

Yes, much too big.

 

[JGTurbo]

From what I've heard, you can get away with a larger carb if you're using annular boosters. Also, annular boosters decrease the carb's CFM. A 575CFM carb with annular boosters has the same size of throttle bores and plates as a 600 or 650CFM carb. The annular boosters are physically larger, so the CFM rating drops.

Just repeating what I've read and heard. No experience here.

 

[kirkallen143]

Here you go...

http://www.holley.com/0-80507-1.asp

Then go over to www.hangar18fabrication.com/blowthru.html and set it up.


Kirk

 

[350kmileford]

Oh god, not that carb! That thing costs 700 bucks! And did you read my previous posts? I already linked to it. And it says it has straight boosters, doesn't that mean non-annular?

 

[InlineUK]

I have one of these, but have not installed the engine yet so cannot comment on whether it is too large or not. From what i was told and emailing the guys at CSU, it shouldn't be a problem. CSU calibrated it to match my engine spec.

.....but i guess i'll have to wait and see!

http://www.csucarbs.com/750.html