2019 GT Manual 6-speed question

[Norm Peterson]

I don't think I have ever considered it rev matching when upshifting, just the normal operation of how the engine drops its revs due to throttle position.

Pretty much the way it is for almost everybody, as it's not something that involves conscious thought.


Norm

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[Silver Bullitt]

Actually, at least on the 2018 manual, it will hold the rpm's partially for a moment when upshifting. I don't have exact algorithms here, but say you are shifting from 2-3 at 3,000 rpm, push in the clutch, the rpm's will drop to 2,500 and then hold there momentarily waiting for the upshift. If you continue to hold the clutch in, it will drop to idle rpm, but it will hold it at 2,500 rpm momentarily.

 

[Norm Peterson]

↑↑↑ sounds like a mild version of emissions-related rev hang.

Sudden full closure of the throttle causes a brief emissions spike (not sure which pollutant, except that it probably isn't NOx), and the allowable per mile quantities of these things are so low that even spikes as brief as it takes for the revs to drop for a decently smooth upshift matter.


Norm

 

[Rael]

May I, who has never driven a manual tranny that could rev match by itself, ask a related question: what does the right foot do while the car is rev matching without me?
Thank you.

 

[poncho@home]

Smokes a cigarette while waiting for the ECU to do its voodoo

 

[The Rooster]

I too was concerned with not being able to permanently turn off the rev matching. Ive owned manual sports cars my whole life and have no problem doing my own rev matching.
That being said... the rev match on the 19 works seamlessly. While hustling down an exceptionally curvy road its a definite advantage when downshifts can at times need to be made at the entry of a curve. The matching is so precise that there is zero "jolt" that could upset the car in those circumstances. I don't care how good you are you can't hit it perfect every time.. the computer can.
Bottom line: For aggressive driving or track use its an advantage, for day to day its a cool gimmick that sometimes I leave on, sometimes I turn off.

 

[BrettT]

I too was concerned with not being able to permanently turn off the rev matching. Ive owned manual sports cars my whole life and have no problem doing my own rev matching.
That being said... the rev match on the 19 works seamlessly. While hustling down an exceptionally curvy road its a definite advantage when downshifts can at times need to be made at the entry of a curve. The matching is so precise that there is zero "jolt" that could upset the car in those circumstances. I don't care how good you are you can't hit it perfect every time.. the computer can.
Bottom line: For aggressive driving or track use its an advantage, for day to day its a cool gimmick that sometimes I leave on, sometimes I turn off.

Agree 100%

As mine is not a DD, I just leave it on for now. Maybe after a while once the novelty wares off, I may turn it off around town, otherwise it stays on.....

 

[Mike's Mustang]

↑↑↑ sounds like a mild version of emissions-related rev hang.

Sudden full closure of the throttle causes a brief emissions spike (not sure which pollutant, except that it probably isn't NOx), and the allowable per mile quantities of these things are so low that even spikes as brief as it takes for the revs to drop for a decently smooth upshift matter.


Norm

It probably has more to do with No Lift Shifting than it does with emissions.

 

[Silver Bullitt]

It probably has more to do with No Lift Shifting than it does with emissions.

It has nothing to do with no lift shifting. No lift shifting, you leave your right foot planted. The pause in the rpm drop is with your foot off the throttle. I believe it's meant to drop rpm's slightly while you engage the next gear,making the transition and clutch engagement correlate to the correct rpm for the next gear. It's not noticeable when power shifting quickly (not to be confused with no lift shifting) and dumping the clutch.

 

[Silver Bullitt]

May I, who has never driven a manual tranny that could rev match by itself, ask a related question: what does the right foot do while the car is rev matching without me?
Thank you.

Stays on the brake as you downshift. Without it, you have to brake and blip the throttle simultaneously with your right foot (referred to as heel/toe shifting).

 

[Mike's Mustang]

It has nothing to do with no lift shifting. No lift shifting, you leave your right foot planted. The pause in the rpm drop is with your foot off the throttle. I believe it's meant to drop rpm's slightly while you engage the next gear,making the transition and clutch engagement correlate to the correct rpm for the next gear. It's not noticeable when power shifting quickly (not to be confused with no lift shifting) and dumping the clutch.

Except you can no lift shift at just about any rpm. You don't have to be on the floor with the gas. I do it all the time when accelerating under normal driving conditions. At part throttle, don't lift right foot, press clutch, rpms drop and hold for smooth transition to next gear, release clutch.

 

[Silver Bullitt]

Except you can no lift shift at just about any rpm. You don't have to be on the floor with the gas. I do it all the time when accelerating under normal driving conditions. At part throttle, don't lift right foot, press clutch, rpms drop and hold for smooth transition to next gear, release clutch.

For some reason, I thought I remembered reading no lift shift only engages above 5000 rpm. That's certainly a different take on no lift shifting that I'm thinking about. My brain won't let me shift without lifting anyway. You can have your foot completely off the throttle and it will drop rpm's slightly and then hold them momentarily waiting for the shift before it lets rpm's drop all the way to idle. Do you have an '18 or '19 or a power pack for an earlier model year that allows no lift shifting?

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