Originally posted by acr
I did a search on this & didn't find anyone who had gone to an Air Gap from a regular dual plane or vice versa. Has anyone actually changed these out either way & noticed any difference?
I went from an Edelbrock Performer intake to an Edelbrock RPM Air Gap. I used the same carb on both, same timing, cam, heads, exhaust, etc. No dyno figures for you. Seat of the pants difference was noticed mostly in the mid range RPM (2500) and above. There was a very big difference when cruising on the freeway at 65 MPH and flooring it to pass another vehicle. Fuel consumption seemed to be the same. I did experience some icing with the Air Gap under the carb area, when the air temps were in the low 30's and below. This went away once the under the hood temps went up. About 15 minutes of driving.
This all is on the 350 engine that I had in the '28 Ford Pickup in my photo album.