With aftermarket exhaust, and NO other mods,and not retuned for exhaust change, my 05 america showed 117 mph on standard speedometer. She was runing very lean due to exhaust mod, factory jetting & tune.
With aftermarket exhaust, baffels drilled out some, 150 mains, 45 piolet, retro style air filters, and not sync'd or retuned, she hit 117 mph on standard speedometer. She is runing rich.
Soon I hope to get a "Pro" to sync,and adjust the carbs, since I seem to be done modifying things for now (wouldn't think ignition coil or wire upgrades would require any carb. mods?)and hope to break the 120 barrier.
All gearing is factory stock.
Forums suggest the stock speedo is off by about 10% to the high side? When compared to the electronic speed monitors (radar signs) set up roadside in Florida, Mine agrees exactly with the posted radar readings?
