Ron, it seems odd that little car affects your rig so much. I know the E-350 is lighter and your 2350 is smaller but that car is less than half the weight of ours.
Quote from: 2 Frazzled on April 06, 2019, 07:09:54 amRon, it seems odd that little car affects your rig so much. I know the E-350 is lighter and your 2350 is smaller but that car is less than half the weight of ours.Our 2007 E350 brakes are not as effective as your current-day E450 brakes in two ways.1) The 2007 E350 and older chassis has a hydraulic brake system exactly like a typical vehicle has. I believe all E450s (and maybe E350s 2008 and newer) have an additional belt-driven hydraulic pump to further assist the braking system, similar looking to that of the power steering system.2) Also starting in 2008, the disk brake surface area is slightly increased.Between the two, it's likely the reason for your improved braking performance.
Maybe I was wrong in that it had it's own belt driven system. It appears the power steering hydraulic system supports it. They call it Hydroboost. My 2007 E350 does not have it. The 2007 E450 does. Maybe Ford got rid of it when they revamped the chassis in 2008.Here is a quote I just found."Hydro-boost power assist was introduced in 1973 by Bendix as an alternative to the vacuum booster. The hydro-boost uses the hydraulic pressure from the power steering system to provide the driver assist in applying the brakes. ... The vehicle requires more assist than is available from a vacuum booster. Mar 1, 2005"It appears the devise replaces the big round vacuum booster we are all familiar with. To you with E450s, do you have the big round thing (vacuum power brake booster) behind your master cylinder?