If all of you are right, in that this 6.2L should have been a 4-valve design in the first place, then it is merely a marketing reason for not doing so to begin with. I hope not, being that I purchased a 2011 6.2L. However, vs my 08' 5.4L, I am very happy. Although milage while plowing is under 11 now. And, if the Ford engineer comes back my guess is that he will circmuvent the question. Again, I am pleased with the engine in a heavy truck. My gripe is the hop-shake which GM is marketing. How about that Mr. engineer? My 2011 hop-shaked into the next lane on a bad city road once. And in general, it is the only gripe, other than mpg, in the 2011 F250, relative to F150s.

 

Uhhhhh,hop-shake which WHO is marketing?? Hop-shake? On the F250? And all this time I thought FORD marketed the F250.... And I STILL don't know what a hop-shake is......

 

I get that hop shake also, sure wakes you up on a rough highway. Tracks well on the dirt road, but when I hit a rough spot on the highway it wants to change lanes.
2011, F250, King Cab, LB, 6.2L, 6 weeks 4 days in shop so far.

 

GM specifically markets hydraulic shocks and dif leaf springs for a smoother ride. Don't know if it works though. Just marketed that way.

 

OK, thanks! I had NO idea what you were talking about! Now I do.....

 

GM trucks have IFS, that is why they do not have a problem with 'hop-shake' or bump-steer.

 

Even better! In my last post I thought it was the REAR suspension that was at fault for these problems, as a too-stiff rear setup CAN also cause aform of bump-steer or "hop-shake"; or at least I thought it could. Thank you!

 

If you want a truck the behaves like a car when empty buy a F150, If you want a truck with a heavy suspension so it can haul a load buy a Super Duty. Any HD truck will jump around when empty but they sure ride nice and stable when hauling or pulling a load.

Denny

 

The thing is any truck with an SFA, Ford, Dodge, Jeep, old GM, will have 'bump-steer'. Bump steer happens when the axle moves in relation to the chassis, and the angle of the pitman arm and drag link changes slightly. This causes a steering influence, so the vehicle will pull a bit to one side (usually to the right). as it hits a bump. IFS will not do this, as suspension deflection causes a change in toe-in, equal on both sides.

 

Even a Twin I Beam will do it when the truck is empty but not when they are loaded and being used like a SD is designed to do. There is a reason why Ford split the F150 from the SD, they now have a car truck (F150) and a hard working SD HD truck for the rest of us that use our trucks hauling and pulling heavy loads not running around empty but they do look good running empty or working their butts off.

Denny

 

Well it doesn't look like the Ford engineer, Mike Harrison, is coming back anytime soon to answer questions. But, if you have a question you'd like to leave for him in case he returns, post it up. Otherwise, let's take the suspension debates, and / or debates in general to their own threads folks.

 

Mike's the 6.2L engine guy anyways, isn't he? So I doubt he'd shed much light on any discussion other than those directly addressing the engine.

Still, it would be fun to have him back after a year of the engine's use by the public.

Too bad.

Mike

 

There's something in the works....stay tuned.

 

I'm riveted to the screen.

Hope I've got enough coffee in the house!

 

Forget coffee..... it's Mountain Dew for the Dedicated Few!
Somebody save me......