has anyone taken there tacho needle above and beyoind

[Sabbath']

When i took my old dash i took the plastic cover off and just sat there for 5 minutes bouncing it off redline with my finger..

MANG MANG MANG MANG MANG MANG MANG!!!!!

 

[GreenGremlin]

usually 7400+ will cause electrical problems.... ie when piston / rod #1 comes through the side of the block and knocks the alternator off....