CLARKOS PERFORMANCE – some info re holley bases for 2bbl carbys, does putting a bigger base on the carby help CFM???
more CFM through same ventury size = higher air speed = more torque

   Today we were compairing apples for apples on a flow bench
350 2bbl holley carby
350 body 500 base flows x amount
350 body 650 base flows 3.2% gain in CFM
350 body 48mm butterflys 2.2% gain from 650 holley 2 bbl base (total 6.4% total gain)
also note the max the carby will flow with no shaft etc is same as 48mm butterflys
(cant push anymore air through it)

500 body 500 base flows x amount
500 body 650 base 3.7% gain in CFM
500 body with 48mm butterflys 4.1% gain from the 650 base (7.8% total gain )

so 7.8% may not sound like a lot but these 500  cfm carbys actually flow about 630 ish when we do the boosters and other things x 7.9% gain is like 50 CFM more making the carby near 680 CFM

(please note u cant just bolt a base on other work is required) 

My next step now is to take car to dyno, and get some dyno back to back data, in real life

yes clarko is now doing the GT methanol 2 bbl carby
350 with 500 base or 500 with 500 base

    for more info on the GT methanol carby click on this link

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1. Clarkos Performance – Metho & Petrol 2bbl Holley Carbys avaliable
2. Clarkos Performance – metho 2bbl Holley giving extra 67 HP
3. CLARKOS PERFORMANCE now has metho 2bbl carbys avaliable
4. Clarkos Performance – 680 CFM from a 500 holley
5. Holley Air Bleeds – By Clarkos Performance