-6 venturi sizing Options

[mb911]

I am starting my carb build for 2.4 s piston solex cammed engine. In my research it looks like 34mm venturi sizing is correct. Any feedback from those that have been there?

[gereed75]

My motor is a 2.4 mod Solex (DC30) JE 9.5 CR T distributor (crane optical) stock heat exchanger, heads ported to 36 intakes, stock exhausts (33 - 34 IIRC). Intake manifold port matched to head and carbs.

My 40 Weber s are set up with 32 venturis, 60 idles, 180 airs 140 mains 110 air bleeds and I think F26 tubes.

Car runs really well. Tuned using O2 sensor and A/F's are all in the 12 - 13.5 range.

Carburetes cleanly from low RPM up to a 7200 limit.

34's might work but I suspect you will sacrifice some torque and low speed and transition smoothness.

Worked with Paul Abbott at Performance Oriented on this set up. Followed his blue printing procedures to a T. One of his customers had this motor with this setup on a dyno and as I recall it made 195.