HI,JUST PULLED MY TWIN 40S APART FOUND EVERYTHING TOO SMALL INC CHOKES.CAN ANYONE TELL ME WHAT THEY ARE RUNNING.STANDARD 2LTR PINTO WITH 4 INTO 1 EXHAUST IN F27 MANY THANKS

What spec dellorto's (no suffix, or maybe H, N etc)

From the speedpro dellorto 40 H
34 chokes
35 pump
140 mains
180 air
772.10 emulsion
55 idle
7848.3 aux
1.5 needles/jets
15mm float stutoff
25mm full droop


BUT the spec of the carb is very important, the above has a fixed bleed, things can vary a lot.

On a 2 ltr Cosworth Yb I am running

dellorto DHLA 45
38 chokes
38 pump
160 mains
180 air
772.6 emulsion
55 idle
7850.1 aux
1.5 needles/jets
15mm float stutoff
25mm full droop

I am at 4500 ft / 1400m so height may be a factor