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Can't figure out no-lift-shift feature in my 2014 Z51 non-mag
I keep hearing "all C7s have no-lift shift". Well mine doesn't... I was at VIR this weekend and had the car in track mode with everything off (hold TCS button 5-7 seconds until both lights come on). I tried power shifting at 6500 and as soon as I'd push in the clutch the RPMs would zing up a few hundred RPM higher and it was like the crap I did as a teenager in high school drag racing. When you'd let the clutch out you could feel the driveline take the hit... it was not smooth as there was no rpm/fuel cut when I pushed the clutch in.
Is no-lift-shift only in PTM enabled cars?
For the record I did not test the car in competitive driving mode as I do not use that and I didn't engage launch control as that's not practical on a road course.
Does anyone know definitively? I've done some google searching and the ask tadge says it's on all the time in all C7s. Mine isn't working... and I don't have any codes and active rev match works fine.
I keep hearing "all C7s have no-lift shift". Well mine doesn't... I was at VIR this weekend and had the car in track mode with everything off (hold TCS button 5-7 seconds until both lights come on). I tried power shifting at 6500 and as soon as I'd push in the clutch the RPMs would zing up a few hundred RPM higher and it was like the crap I did as a teenager in high school drag racing. When you'd let the clutch out you could feel the driveline take the hit... it was not smooth as there was no rpm/fuel cut when I pushed the clutch in.
Is no-lift-shift only in PTM enabled cars?
For the record I did not test the car in competitive driving mode as I do not use that and I didn't engage launch control as that's not practical on a road course.
Does anyone know definitively? I've done some google searching and the ask tadge says it's on all the time in all C7s. Mine isn't working... and I don't have any codes and active rev match works fine.
It should work In every mode. Leave tc and stab on and see what happens
It should work In every mode. Leave tc and stab on and see what happens
I tired it 3X yesterday on the straights. Track mode, everything off, foot on the floor near 6500 rpm speed shift. RPMS went up to I guess the 6600 rpm cut-off and you could feel the driveline "thud" when clutch was let out. Felt like I was abusing the car and went back to speed shifting letting off the gas quickly. I grew up drag racing and it felt just like "power shifting" when you keep it floored and shift as quickly as you can. I thought NLS would keep the rpms at whatever rpm you pushed the clutch in over 6K rpms, but it doesn't appear to work that way. The Camaro forums has a detailed explanation with tables by former chief engineer Al Oppenheimer (sp?) and he shows there's a min activation rpm and then a target rpm i.e. it's not active until you're over 5K rpm and then the target rpm is 6400 so if you stab clutch in anything before 6400 it will zing there. I guess It's possible I was shifting at 6300 and it was zinging to 6600, but in my mind I was waiting for the blue shift light to blink.
I tired it 3X yesterday on the straights. Track mode, everything off, foot on the floor near 6500 rpm speed shift. RPMS went up to I guess the 6600 rpm cut-off and you could feel the driveline "thud" when clutch was let out. Felt like I was abusing the car and went back to speed shifting letting off the gas quickly. I grew up drag racing and it felt just like "power shifting" when you keep it floored and shift as quickly as you can. I thought NLS would keep the rpms at whatever rpm you pushed the clutch in over 6K rpms, but it doesn't appear to work that way. The Camaro forums has a detailed explanation with tables by former chief engineer Al Oppenheimer (sp?) and he shows there's a min activation rpm and then a target rpm i.e. it's not active until you're over 5K rpm and then the target rpm is 6400 so if you stab clutch in anything before 6400 it will zing there. I guess It's possible I was shifting at 6300 and it was zinging to 6600, but in my mind I was waiting for the blue shift light to blink.
Wish I could help, I had no issues with my GS, something has to be wrong unless the Z51 isn't equipped. I just looked at one of my video's and the shifts are smooth not like the old style "power shifting" that you've referred to where you feel like the rev's are going to the moon.
Wish I could help, I had no issues with my GS, something has to be wrong unless the Z51 isn't equipped. I just looked at one of my video's and the shifts are smooth not like the old style "power shifting" that you've referred to where you fell like the rev's are going to the moon.
Some are saying you have to have pressure on the shifter... if it doesn't sense that it just goes to redline. Who knows. Hard to test on street.
I was in default mode (turned car off the back on, and didn't realize I wan't in PTM). This shows me NLS on VIR full course at the bridge straight (1:05) and on the back straight (1:35). I was near redline both time and my foot was too the floor and unmoved.
Edit: Just rewatched my clip and towards the end on the front straight NLS worked under approx 6200 RPM.
I was in default mode (turned car off the back on, and didn't realize I wan't in PTM). This shows me NLS on VIR full course at the bridge straight (1:05) and on the back straight (1:35). I was near redline both time and my foot was too the floor and unmoved.
I was in default mode (turned car off the back on, and didn't realize I wan't in PTM). This shows me NLS on VIR full course at the bridge straight (1:05) and on the back straight (1:35). I was near redline both time and my foot was too the floor and unmoved.
Edit: Just rewatched my clip and towards the end on the front straight NLS worked under approx 6200 RPM.
To me the big difference with NLS is what I'm doing with the accelerator and how it sounds. I know for NLS my foot had to be all the way to the floor and steady. When it was the shift sounded like a reverse rev-match.
Heres the full session of the above C7 clip was taken from. Ignore all the taking, it was my first and only time driving a C7 Z06 at track and it was a good one
Pretty sure I responded to you on FB but here is what I think.
I don't believe NLS does anything to control the revs, it just modulates the engine torque so you don't hammer the driveline when you let the clutch back out. The revs definitely jump when you push the clutch in. There is a fuel cut but the inertia will make them jump a bit more - 6700 RPM isn't unusual but there is no load. I can't say I've ever felt a "hit" to the driveline but sometimes there is a brief bog like the TC kicked in.
Pretty sure I responded to you on FB but here is what I think.
I don't believe NLS does anything to control the revs, it just modulates the engine torque so you don't hammer the driveline when you let the clutch back out. The revs definitely jump when you push the clutch in. There is a fuel cut but the inertia will make them jump a bit more - 6700 RPM isn't unusual but there is no load. I can't say I've ever felt a "hit" to the driveline but sometimes there is a brief bog like the TC kicked in.
03-25-2019, 02:16 PM
Can't figure out no-lift-shift feature in my 2014 Z51 non-mag
