Ecodiesel: 19.46 MPG Towing 7,020 lbs.

brulaz wrote:

Perrysburg Dodgeboy wrote:

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Well that could be said for the Ford Eco-Boost engines also. A V-6 gas with twin turbos towing a 7-10,000# TT will be at WOT and full boost also.
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Full boost maybe but definitely not WOT.

You really don't get the low-RPM torque thing ... :)

Even thou it's not in his sig, I know what he drives... trust me, he get's the low rpm torque thing. His truck makes more torque below 1500 rpms than an ecoboost does peak.

brulaz wrote:

All I was pointing out was that the Ecoboost doesn't need to run WOT to get it's MAX torque. Max torque is way down low. It's like a diesel that way, but trades off the diesel mileage for greater HP.

I hate to burst your bubble, but that statement is false.

In order to make max torque it takes max fueling at 2500 rpms. Max fueling is also known as WOT, or wide open throttle.. it is a rate of fuel and not associated with rpms.

Since your talking in a diesel thread, to guys with diesels as well I wouldn't use the term "way down low". It's still 900 rpms higher than my truck made peak torque in stock trim, so it's not diesel low. The ecodiesel and ecoboost both make 420 ft/lbs, but the ecodiesel does it 500 rpms sooner, so again the ecoboost is not "way down low" in referecne to this thread.

The ecoboost does develop more low end torque than it's gas counterparts, but you can't come into a diesel thread and start talking about how low it is.. it's all relative.

The mileage doesn't occur at peak hp or rpms, so that's not why the ecodiesel gets better mileage. The ecodiesel gets better mileage because it's a diesel, it's a more fuel efficient platform to begin with.

My truck makes about 150 more hp at the crank than stock and gets a bit better mileage too, just a point.

brulaz wrote:
I've pulled my 7500# trailer up many steep hills and never had to go WOT. But for sure, when it's running full boost, even at lower rpms, it may be sucking gas as if you were WOT on a non-turbo gasser.

The way modern fuel injection works, especially on forced induction motors (gas and diesel alike) unless you have a OBDII monitor that tells you engine load you really don't know if you are WOT or not. Under some circumstances the ECM can fuel at WOT rates without the pedal being on the floorboard. Chances are that you are correct that you where not at 100% load, but it's not always associated with a physical WOT by the driver. Lower rpm stuff can call for full fueling without WOT, and going WOT on the throttle would only induce a downshift.