See 1976 Chevrolet pickup with Rochester quadrajet upgrade on SBC 350 V8. We removed the hood, mounted a camera looking down on the air horn, and took it for a spin, running wide open on an uphill grade. See how the secondary air valve responds to rpm drop at each upshift of the THM. Also included is a smoking burnout.
Q jet secondary operation
Quadrajet Madness IR intake and 4 carburetor test driving and tuning
First series of test drives with the 4 carburetor setup. Many things learned from this experience!