1972 911 mfi stack air flow

[rowingone]

Doing CMA on my 1972 MFI 911T and number one cylinder I get too much air flow and the air bleed screw adjustment has no effect . . and yes I cleaned the air passages. Adjusted the butterfly stop and still no change. How do I get this aligned with the other stacks?

[yelcab1]

It's been a long time for me. If I remember correctly, similar to carbs, you adjust the low cylinders to match up with the high-flow cylinders.

[nickelplated5s]

My #1 is 10% higher than the others too. Air screws adjusted and cleaned. Personally mine is going into an MFI shop in the spring. They don't like it when you 'fiddle' with it. Possibly it's the bushings. Just acknowledge it if you're selling.