Top speed for '21 Powerboost

[Tank]

I've been north of 140mph a few times in my 2021 Powerboost....
I'm tuned by Livernois Motorsports...

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[fordtruckman2003]

Ford vehicles have been governed for many years now. It probably keeps knuckle heads from driving 150 mph and coming back in and claiming engine problems.

The understanding I had from many years ago on forums is the vehicles will log a permanent non resettable over speed code before you get to the limiter.

 

[nkgreen7]

I've been north of 140mph a few times in my 2021 Powerboost....
I'm tuned by Livernois Motorsports...

Is that strictly a tune or other goodies? What tires do you run?

 

[Diligenthunter]

I've been north of 140mph a few times in my 2021 Powerboost....
I'm tuned by Livernois Motorsports...

What’s your wheelbase, at 157” I had mild concerns about the drive shaft. Haven’t pushed passed 120.

 

[Icecoldak]

Yep I been 125+ Goose tune--stock tires, smooth as a baby butt!! 2019 Limited 3.5 HO
I tell ya mid range power is like a rocket ship---insane!!

 

[Tank]

What’s your wheelbase, at 157” I had mild concerns about the drive shaft. Haven’t pushed passed 120.

145"...I have been 150mph a few times.
I am currently #2 Fastest Powerboost in the country..
12.07@ 114mph

 

[Tank]

Is that strictly a tune or other goodies? What tires do you run?

Intake, tune, exhaust, intercooler...
Stock tires..
I am currently #2 fastest Powerboost in the country...on 325 45R18 Hoosier DR2 drag radials.
12.07@ 114mph

 

[Diligenthunter]

Intake, tune, exhaust, intercooler...
Stock tires..
I am currently #2 fastest Powerboost in the country...on 325 45R18 Hoosier DR2 drag radials.
12.07@ 114mph

Interesting…

I have intercooler and intake. Have cv boost tubes waiting to be installed (not expecting much) I currently have liv tune but truck felt faster with 5 star.

What did you do for exhaust (heat exchanger?)

 

[Gros Ventre]

All rotating machinery will have a speed limiter. Has to do with how finely they balance things inside the engine. Once we went away from the Kettering ignition type systems the ability to include this in the engine control design was easy. Keep in mind that balancing engine components cost money. If they can save a few bucks by putting in a speed limiter and having a less carefully balanced engine, they'll do that.

 

[Diligenthunter]

All rotating machinery will have a speed limiter. Has to do with how finely they balance things inside the engine. Once we went away from the Kettering ignition type systems the ability to include this in the engine control design was easy. Keep in mind that balancing engine components cost money. If they can save a few bucks by putting in a speed limiter and having a less carefully balanced engine, they'll do that.

I certainly understand transmission and driveline balancing but I don’t understand how engine balance comes into play on top speed.

Due to gearing and rotational I understand there being more strain on an engine in say 10th gear at 5k rpm vs 2nd gear at 5k rpm.

Genuinely asking to learn on this.

 

[Tank]

Interesting…

I have intercooler and intake. Have cv boost tubes waiting to be installed (not expecting much) I currently have liv tune but truck felt faster with 5 star.

What did you do for exhaust (heat exchanger?)

You cant go by feel, gotta take it to the track or Dragy it....
I have the CVF Hot and Cold Intercooler piping kit...can't really say if they improved too much...but you can definitely hear the turbos spooling more...it echos in the aluminum piping.
There is only one 5Star tuned Powerboost on the Fastest list ..I think they are 3rd or 4th.

I have the Livernois exhaust.

 

[Diligenthunter]

You cant go by feel, gotta take it to the track or Dragy it....
I have the CVF Hot and Cold Intercooler piping kit...can't really say if they improved too much...but you can definitely hear the turbos spooling more...it echos in the aluminum piping.
There is only one 5Star tuned Powerboost on the Fastest list ..I think they are 3rd or 4th.

I have the Livernois exhaust.

Yeah I need to find my Dragy.

Dyno tune from them or just remote data logged?

Okay so that’s just a cat back exhaust right?

 

[HammaMan]

I certainly understand transmission and driveline balancing but I don’t understand how engine balance comes into play on top speed.

Due to gearing and rotational I understand there being more strain on an engine in say 10th gear at 5k rpm vs 2nd gear at 5k rpm.

Genuinely asking to learn on this.

I used my values, 6500 RPM shift point, 3.73s, and 34.1" tires -- max speed in each gear using those variables.

Good luck getting to 5k rpm in 10th gear.

Also of interest is what RPM you land in on each gear shift, here's 2-5 assuming shift point of 6500 RPM for previous gear. The gears are so tight that it may be more beneficial to short shift depending on variables.

 

[Diligenthunter]

I used my values, 6500 RPM shift point, 3.73s, and 34.1" tires -- max speed in each gear using those variables.

Good luck getting to 5k rpm in 10th gear.

Also of interest is what RPM you land in on each gear shift, here's 2-5 assuming shift point of 6500 RPM for previous gear. The gears are so tight that it may be more beneficial to short shift depending on variables.

5K was just a random value I threw out.

My question was the relationship between “engine balance” and top speed. Traction equal is there a difference to the engine being at redline in 2nd gear vs say 5th that would be effected by how “balanced” the engine is. Per Gros Ventre’s post.

 

[Gros Ventre]

I certainly understand transmission and driveline balancing but I don’t understand how engine balance comes into play on top speed.

Due to gearing and rotational I understand there being more strain on an engine in say 10th gear at 5k rpm vs 2nd gear at 5k rpm.

Genuinely asking to learn on this.

Consider the rotating crankshaft or the rotating valve trains... consider the chain drives inside the engine. The RPMs go from around 1300 up to over 5000 and they are higher RPM than the transmission or driveline. Balancing various components and balancing between them makes a difference. And keep in mind that damage from rotational vibration is not a linear increase, it's a square function. But in the end, I think that Ford is just minimizing cost when they specify certain elements of these components to be within a given tolerance.

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