<VV> tach

[Arend Huisman]

i have installed a Spyder dash in my '64 monza; everything works well except for the tach, which gives a reasonable good idle speed, but doesn't go further up than 1500 rpm. I looks like it responds to the vacuum directly. It is connected to the minus pole of the distributor coil as discribed in the electrical scedule (Classic Corvair, Bob Helt) Can someone help me out?

Thanks in advance,

Arend Huisman
Netherlands