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Top speed in each gear

Messages
210
Likes
59
Location
Metro Detroit
#21
I strongly disagree on behalf of engines everywhere. Flooring anything in a high gear at low rpm is one of the few ways I know to deliberately damage your car. Direct injection plus turbo happens to be the setup that is at most risk of damage by doing this.
That would be changing the context rather strongly. We're talking about EcoBoost engines and their excellent LSPI strategy. Even then, compare the EcoBoost's to the BMW B-series TGDI Valvetronic engines. They have a torque shelf that starts at 1250 RPM.


research low speed pre ignition to have a gram of reference of what I am referring to
That's what I included in my previous reply. I recommend giving it another read, along with Cobb's Ford Tuning Guide if you don't already have ATR. If there's an emotional fear of you pushing the pedal to the floor based on previous cars, it's simply not a relevant response in the context of this engine. If you want a number, then according to ATR's examples the LSPI risk significantly drops off above 2k RPM, which also correlates to a significant rise in requested torque. Note that the ECU limits your torque request at low RPM. What your foot does and what the ECU deems safe is predetermined.
 


Rhinopolis

Active member
Messages
665
Likes
180
Location
Houston
#23
That would be changing the context rather strongly. We're talking about EcoBoost engines and their excellent LSPI strategy. Even then, compare the EcoBoost's to the BMW B-series TGDI Valvetronic engines. They have a torque shelf that starts at 1250 RPM.




That's what I included in my previous reply. I recommend giving it another read, along with Cobb's Ford Tuning Guide if you don't already have ATR. If there's an emotional fear of you pushing the pedal to the floor based on previous cars, it's simply not a relevant response in the context of this engine. If you want a number, then according to ATR's examples the LSPI risk significantly drops off above 2k RPM, which also correlates to a significant rise in requested torque. Note that the ECU limits your torque request at low RPM. What your foot does and what the ECU deems safe is predetermined.
Cool, I'll give it a look.
 


Sourskittle

4000 Post Club
Messages
4,567
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860
Location
Lakeland
#24


Don't fool yourself... There are limits as to what the ecu can do to save you.
(Not mine, its a friends, no story behind it ).
 


Messages
338
Likes
202
Location
Rancho Cucamonga, CA, USA
#25
173 is theoretical top speed, yes? Even without a limiter, at what point can the car just not push the wind out of the way anymore? Let's assume there is no head wind, at a stand still start, on a perfectly level road.
 


Hijinx

3000 Post Club
U.S. Air Force Veteran
Messages
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1,669
Location
Auburn, AL, USA
#26
173 is theoretical top speed, yes? Even without a limiter, at what point can the car just not push the wind out of the way anymore? Let's assume there is no head wind, at a stand still start, on a perfectly level road.
Depends on how much power you've got.


Sent from my iPhone using Tapatalk
 


brbauer2

Active member
Messages
766
Likes
530
Location
St. Charles
#28
All I know is I can get to 60 MPH in 2nd gear with a Stratified E-Tune before the car protects itself. Makes 0-60 times look better without that shift to 3rd.
 


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