I think all of us that run vws in IT remove the vacuum lines. But there are springs and weights in the distributor that will advance the timing as the rpms go up. For example w/o vacuum lines if you time a car at 2500 rpm at 31 degrees, when the motor revs to 5000 rpm you will actually have about 35-36 degrees of timing. So remove the vacuum lines but realize that does not keep the distributor from advancing. The springs and weights in the distributor determine how the distributor advances. BSI changes the weights and springs to something out of porsche for a better advance curve. Its not cheap as those springs and weights are getting rare. I have spent a lot of time with this on a 1.7 so I am not going to give it all up, but I will say at 4800 it should be less the 30.

All 1.7 vws were moved to ITC this year. You will be much more competitive there.

Derek