Rum, rum, rum@ 3,500 RPM
My E450 with V10 has a slight surging of RPMs at 3,500 and climbiing hills. Normal or something out of balance? New 8 months old 2015 chassis.
Forum Discussion
Our first Class C had a 460 with Flowmaster aftermarket single exhaust. It FELT smooth, but at cruise the exhaust note had a slight roll in it. I'm sure Ford tries to tune resonances out, but adding X-feet to the piping might just upset the balance.
