Hey everybody! First time on the big truck forum. I figured this would be an appropriate place to ask this question. When the medium duty trucks were offered with gas engines, why weren't they offered with the 460? I know GM did the same with their 366/427 instead of the 454. This has always intrigued me.

FWIW from the time I was a sophomore in high school up to now (junior in college) I've been employed at a mechanic shop/tire center as a summer job. Every three weeks I have to take scrap tires from Manassas, VA to Lynchburg in Big Yella, a 1990-something Ford F-700 ex-Ryder truck. 24ft box, 7.0L EFI with an auto trans. Truck sounds beastly with worn out dual glasspacks, especially out on the interstate when I really let er rip!

You all may be hearing from me again - I've offered to fix up Big Yella for my boss as she's been sitting for about a year and a half. The old girl's got sentimental value to me..... I learned to drive in a Honda Civic and one day my boss says "Hey Evan do you have your license? Take the truck down to Lynchburg and drop off these tires" Figured he was talking about his pickup.... Sometimes ya gotta learn by doing!

 

460: 1968/78 Lincoln/Continental Mark III/IV/V / 1972/76 Thunderbird / 1973/76 F100 / 1973/78 Ford/Merc Passenger Cars / 1973/79 F250/350 / 1975/79 F150.

1975/97 E250/350 / 1983/96 F250/350 / 1997 F250 H/D & F350.

 

one of the main reasons the OEMS go a little smaller on the cube in their bigger truck is the cooling. More cubes generate more heat. It is still done to this day.
Most MDT gas engine will have larger exh manifold than the lighter versions.
You can see this in the exh manifold of a standard 300 six and a HD 300 six (yes they really did exist )
Nearly every car company will also detune engine used in bigger vehicle .
Just look at the HP specs for the 6.7 Ford diesel used in F650/F750s and compare to the same engine in a F250.
The 6.8L V10 in motorhomes are the same way look at the F650 and last year they were in the F250s.

The MDT truck have the gas paedal mashed to the floor and it might stay there 15 mins straight.

 

That's a really interesting point, I never thought of that. I read something online about relative piston speeds between the bigger engines vs the smaller cube but the cooling point makes more sense. I'll tell you I've had that poor F700's pedal through the floor board for way more than 15 min at a time going down Route 29

Thanks for taking time to educate a young muh.