Annular boosters on a Tunnel Ram

71 GSS,
Your post #107. Sorry for the delay [ time difference ]. The quotes you need are in posts# 19, 27 & 53.

I thought I had included the info from Holley engineer, Mike Urich. Couldn't find it, might have been thinking of another thread.

P. 23 of the Holley book: 'The strong signal from the discharge nozzle is bled off by the main air bleed so there is less effective pressure difference to cause fuel flow. The mixture will become leaner as the size of the air bleed is increased. Decreasing the bleed size increases the pressure drop across the main jet to pull more fuel through.'