BMW 540i on Dyno with Resonator and Silencer Removed
This was the second run of the day and is after removing the resonator and silencer and replacing with straight pipe. Modification resulted in a net loss of HP and Torque in the midrange of the powerband. Test run in 4th gear because dyno owner did not want 5th gear (1:1) speeds on his equipment. 267.0 hp @ 5750 RPM 264.4 ft/lb torque @ 4750 RPM Vehicle: 1997 BMW 540i 6 speed Modifications from stock: Resonator and Silencer removeed Royal Purple ATF transmission fluid Electric Fan conversion ...
