Reply to "Mechanical vs Vacuum Secondaries"

I now have the lightest spring (white) installed. The carb has good manners when driving with others around. I took the car to a more isolated place for some testing and I am impressed with how the vacuum secondaries operate. Unlike a mechanical secondary carb the vacuum secondaries begin opening predictably at part throttle. The car chirped the tires going into second gear. There needs to be plenty of Venturi velocity for the secondaries to open. The car needs to be in a higher RPM range and a lower gear. For example, the secondaries will not open when going 30 MPH in third gear even if you floor it.

Thanks all for your guidance with this.

4/17/223:49 PM

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