Quote:
Originally Posted by Gaz64
A fuel curve that goes rich in the middle while the throttle is wide open won't be affected by changing the accelerator pump squirters.
The carb is wide open at 3000 rpm with correct A/F ratio, pump volumes have already been used up.
A/F ratio is correct again at high rpm, which shows it is not pump "pullover".
Google "emulsion tuning".
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The other thing I'd check is the power valve........correct, the pump squirter only squirts extra fuel during accelaration from idle to full throttle,once the throttle blades are open (your right foot on the floor), the squirters are not pumping any fuel into the venturi.....
I'm guessing there is something internal in the carb that is casuing the richness at a certain rpm level.....
David