hi all. I have my 74 bug at dyno now for about 3 weeks that can not figure out why the car falls flat at 4500 rpm any ideas? Its like it has a rev limiter but does great till then and the hp curve is still climbing at 124 hp then just drops off almost like engine is shut off .had other dyno guys look at it but can't seam to find out why. Non of the guys have worked on cb performance tuning before they said. Any ideas would be great it is the 2nd series I think in the gold computer housing.