Thor Forums

[Chance]

The following note applies to table I posted above:


“All 2021MY E-Series vehicles have a 7.3L Gas engine which is certified using the Heavy Duty Engine Protocol (Dyno Cert), and therefore do not require Frontal Area or Unloaded Vehicle Weight Restrictions in order to meet emissions standards. However, there are Frontal Area Restrictions required to maintain optimal vehicle performance in all conditions. If the Frontal Areas in Table A are exceeded, engine output may be reduced in extreme situations to maintain safe operating temperatures. The vehicle may be completed up to the “Standard” max frontal area with no SUB radii restrictions and up to the “Enhanced” max frontal area if the radii restrictions in Figure A (for Cutaways) and Figure B (for Stripped Chassis) are followed.”


I think it’s important because it gets around some of the issues Thor and other companies had when they started using E-450s in place of E-350s due to emission restrictions; which were so ineffective anyway — to say it nicely.

Anyway, looks to me like smaller and lighter motorhomes can remain on E-350 chassis and not be limited by frontal area and associated aero drag restrictions.