I have a '73 911E with MFI with a newly rebuilt pump. I read the attached description on how to balance the MFI throttle bodies and was going to use this method. Note I am going to use a standard high quality vacuum gauge rather than the U-tube system.
I was wondering if someone can confirm the following procedure. Disconnect the vacuum line of each throttle body side one side at a time, plug all of the open ends and at 3000 rpm disconnect and measure each ITB vacuum one at a time. When done with both sides, add all of the values up and divide by 6 giving me an average vacuum. Then repeat the first procedure but this time by adjusting the air bleed screws, adjust the ITBs to the average value. The paper seems to indicate that this is how you get each ITB balanced in the system.
Is this right?
