annular carb boosters
Intermediate
Joined: Sep 2001
Posts: 26
Likes: 0
From: Burnaby BC
Annular boosters can provide better throttle response and improved drivability over other types of boosters. They may result in slightly lower peak HP since they are more restrictive that doglegs etc. to overall airflow (depends on carb sizing etc.). I have used them on my 830CFM Holley 427BB with excellent results.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I changed my 825 Race Demon to annular boosters and it is better on the street, seems like more torque in the lower RPM's, you basically go one size bigger carb and put annular boosters in it. Or just swap what you have it won't make much difference size wise. My carb flows 975 cfm according to BG 
