mrpositraction

So I was right (in the joke that should be taken as a joke)

TQ is how far you take the wall with you

I did just fine in physics class

OmahaEcoBoost

So you're saying that when I normally drive around with my RPMs consistently between say 1,200 and 1,700 RPMs, I'm not getting the 325-385 or so of torque as indicated by this chart in steady state?

TruckLarry

The only physics I know is LED's do not emit light, they suck darkness...

TruckLarry

These are also very lightweight twin turbos, which as I understand all but eliminate turbo lag.

I sure don't detect any.

Thunderslide

do you think it takes 325-385 TQ to maintain speed when a 5.4 only produces that same amount. if you out put was that all the time you would have to hold the brakes on to keep it form going as fast as it can.

In other words if it is producing it where is it going if not to the wheels.

when my 5.4 produces max tq it is gaining speed, when it is producing less I don't gain speed.

bigal1234

I'm new to this but I suspect that when you are just cruising around town at a steady speed the turbos aren't doing anything. When you put your foot down they will kick in. It's nice to have available and also nice to not use it all the time and waste fuel.
The small displacement of this engine helps to save on fuel use.
Al

daveo987

You got it right, off cape cod they putting in a wind farm, cost per kwh estimated at 25 cent vs current cost in that state of around 6 cents, & thats after 600mill of Fed taxpayer money.

I put in solar a few years ago, assuming NOTHING breaks for 26 years it will have paid for itself.

mrpositraction

Yes, you are only making enough torque to maintain pushing your vehicle down the road, through the air.

Think of it this way. If an engine is making more torque than it needs it speeds up, if it isn't making enough torque, it slows down. This works from idle to redline.

Turbo are cool, but they are not magic. Driving around, they are actually doing something. You will see 0 bar/psi (atmospheric pressure) most of the time while cruising. In an NA motor, you would never see this (unless you have a intake tube, filter, and intake made by Jesus). At idle, with no load, you will see very similar to an NA motor (22" of vacuum say). So at 0 bar/psi, you engine is actually a little more efficient on the intake side of things because of less resistance in the intake track, but on the exhaust side of things, there is a little more resistance to push the exhaust out (this is the parasitic loss of a turbo, yes, there is some). So driving around like a normal person, the turbo does very little (although, it is very hard to accelerate and not get into 3-4psi, this motor is set up very diesel like, my little Super Duty )

Hope this helps clarify a little bit, I am no expert, but I have played with cars quite a bit, from little turbos (this being the smallest), to larger 98mm turbos, from single to twin to sequential. They all have their pluses and minuses. I have alway like the twin setups, and Ford has done a great job setting this up. If they went bigger with the turbos and left a bunch of power on the table, we would all be experiencing turbo lag more than we are now. This is how a perfectly setup trubo system should run for a daily driven truck. A sports car, some would expect more lag, but in return, you would have more upper end.

bigal1234

Thanks for the info.
Al

the_slug

Yes, all HP and Torque ratings are at WOT. I don't think anyone ever tests or rates one at 1/8 throttle, 1/4 throttle, etc.
Never stated that I, or any EcoBoost, was going to get 20+mpg at WOT.
Most trucks do not pull heavy loads or trailors every day. Most are used as daily drivers, commuter vehicles, the new family car. So "yes", the VERY light loads (where most F150's are used, look at any Wal-Mart parking lot - there will be 20 full sized pickups with empty beds) make it a great choice.
Never stated that I, or any EcoBoost, was going to get 20+mpg pulling a heavy load. Most of us except the we will use more fuel to move more weight. It just nice to know that for 90% or more of the time, I'll get good mileage.