Remapping

spiritoftheblues
spiritoftheblues Forum Participant Posts: 9
edited September 2014 in Motorhomes #1

Just returned from the Lincoln Motorhome Show, I was interested in the stalls claiming to give your more MPG and torque.  One way was by remapping the ECU and the other by adding another unit.  Are these systems worth the outlay and would they invalidate the warranty?