kerrlakeRoo wrote:
My thought wa a more economical engine for towing in a 3/4 ton truck.
And no, I dont want a diesel. But I would like a slightly heavier payload and tow cap than a F-150.
With the economy they were able to get with the 3.5 EB, it just seemed a natural transition to a larger engine and maybe a heavier truck, while still bumping the mileage a little from the 6.2.
I think the fundamental difference is most 1/2 ton trucks rarely haul or tow heavy. Probably 95% of all miles driven in 1/2 ton trucks would have plenty of power with a naturally aspirated V6. In practice, if you don't stomp on the gas, the ecoboost spends the vast majority of it's time at or close to a naturally aspirated mode. So the loss of MPG when towing and using lots of boost, doesn't really impact the overall MPG much. Likewise as long as it's only occasional towing, it doesn't impact the overall longevity of the engine much.
When you move up into the 3/4 & 1 ton trucks, that 95% number drops off significantly (not sure the exact number but even if it's 20-30% under heavy load, that's a much different design requirement). Far more time is spent with the bed full of heavy stuff or towing trailers. The result is even moving up to a small V8, it would spend a lot of time under turbo boost. They can compensate on longevity by building it heavy like a diesel but then it will cost like a diesel plus it will cannibalize diesel sales and they get a lot of money on the diesel upgrade. It likely won't see the MPG benefits because if you generate big HP, you have big fuel consumption.
You may see a turbo'd V8 for a mustang but likely will be almost an after market deal. No one is towing with mustangs so other than a few seconds punching it off the line, the engine won't see a lot of boost and a standard V8 with a turbo bolted on will hold up OK (yeah there is more to the design but not a total redesign like the ecoboost).
