Any Carb Gurus out there want to comment?

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#3 (permalink)

04-18-2012, 12:22 AM

Dana E.

CC Member

Join Date: Dec 2004

Location: Hillsboro, OR

Cobra Make, Engine: Superformance SPO2512 427W TKO 600/ NW Exotics 351 Cleveland/Tremec 3550-Sold

Posts: 71

Not Ranked

Perry,

Adjust both the primary and secondary throttle plates so they are open the same amount. Adjust all four of the idle mixture screws-start with one turn out and go from there. How does it run if you set the idle speed to 1100-1200 rpm? If it stumbles/bucks off idle driving at light throttle, that sounds like it's too lean.

Give quick fuel a call and see what they have to say about the fuel curve of the race carb. No doubt that race carb is plenty rich. A bigger carb will no doubt make more power up top, but it might be a bit "soggy" down low.

I'm curious-what's the cranking compession of your motor?

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