8iron wrote:
I have read the articles. And this more than anything is what I get from them:
"We have no doubt that the EcoBoost engine is delivering the power. It's measuring it accurately, especially at lower RPMs, that's tricky."
They are admitting that it is not a low speed power issue but a measuring issue.
The articles also state that 0-20 times favor the 5.0 but after that? not so much.
pickuptrucks.com wrote:
Ford’s engineer believed that 1st gear in the EcoBoost F-150 was too short to make low-end power, though there was lots of high-end power, 2nd was just fast enough to get the cams moving while 3rd tended to get the emissions catalyst too hot, which started to affect backpressure reducing power. K&N has also run a similar 2nd gear setup testing a 3.5-liter V-6 EcoBoost Ford Taurus with front-wheel drive.
pickuptrucks.com wrote:
But in our tests, we've also repeatedly clocked the 5.0 with faster zero to 20 mph starts before EcoBoost really turns on the power from 20 mph to 60 mph. Slower zero to 20 mph times could also be caused by turbo lag, not torque management.
Ford's engineers say EcoBoost's torque is not limited at anytime.
pickuptrucks.com wrote:
After all the dyno finessing, our impression is that EcoBoost may not grunt out its full torque potential at low rpm in lower gears in full auto shift mode. It may do this so it doesn’t overwhelm a driveline component if a tire slips and then finds traction again. We might see full torque only at higher speeds, as we did in our original dyno runs on the Dynojet.
pickuptrucks.com wrote:
However, we're not saying that EcoBoost doesn't make its published torque on the road in the real world because we've consistently seen EcoBoost F-150s outperform closely configured 5.0-liter F-150s when we've put both against the clock measuring zero to 60 mph times empty and pulling a heavy trailer (with identical and different rear axles).
As I said, towing will help load the turbos quicker and have higher performance. I never said it didn't make it's rated torque at 2500 rpm, it's just at higher gears with normal driving. Loading will help, but still isn't the same as a N/A engine with a 2500 rpm torque peak with all gears.
ArticleEcoboost is a good motor. It just delivers it's power differently than the 5.0L. Both motors have positives and negatives to their performance output.
The Ecoboost is not an end all.
I found I prefer the instantaneous power output of the 5.0L at lower gears for quicker acceleration with merging. I also like the engine braking of the larger displacement 5.0L when going down hills.
The towing performance of the Ecoboost is it's positive with greater torque for driving in hills and highway speed acceleration.