Cummins New 5.0 V-8 Diesel?

carringb wrote:
Ford has to down-rate the EcoBoost in the Transit to only 13,000 pounds GCWR, in order to mass the Medium-Duty test cycle. And... it could even pass with a full profile body attached to the cutaway, which is why there will be no EcoBoost Class C motorhomes. Only the 3.7L base gasser or the diesel. It simply isn't capable of shedding enough heat under severe conditions, or last long enough for Medium-Duty customers.

PS - All new Forest River coaches are rated for 7500# towing, and Thor puts an 8,000# receiver on all their new coaches.

I've towed many miles with my V10, and also towed some with an EcoBoost F150. Even with the much lighter trailer, it wasn't very hard to get the EcoBoost into "power train protect mode" because the cylinders get hot fast on steep long grades.

Huh. Something new every day.

I wonder if the Transit may have issues with heavier weights at the slower speeds it generally sees, not to mention the smallish air inlets on the front.

Sounds to me like Ford needs to sacrifice a little spool-up for reliability. Too small a turbine housing for the rated power results in poor delta-P (more pressure in the exhaust manifold than the intake manifold), which means massive heat-soak and white-hot exhaust manifolds.

I've been racing turbocharged cars for over a decade now. If I can get a small OEM turbo (T25) making 230whp/wtq out of a 2L 4-banger known for poor cooling on CA's 91 octane to last seasons of racing (40 minutes at WOT except for split-seconds of braking), surely they can get a modern 3.5L 6 making less than 300whp to last. :D

Either way, I take it back: V10 is still fine with me (I have 2).