Dyno results - Tquad vs Holley vs Qjet - tuning issue, too rich

70GS455 said

Here are some of the things we tried View attachment 1715681541

Click to expand...

I’m going to guess that the fuel feed in the top air horn has been drilled larger by the pen markings?

This thought has also crossed my mind as to when that fuel feed may become a restriction. Even though the needle and seats are smaller.