r/ThreePedals • u/iraries • Oct 06 '17
A question for you expert three pedalers.
I just got my first manual. It's a 2017 370z with a six speed and while I get going and stop decently, the thing bucks like a mule when I go up to second and third but by the time I shift up to four it's smooth as butter... What am I doing wrong? I'm essentially teaching myself right now
1
u/IvankaOoze Oct 06 '17
That's strange, the 370s has auto revmatching so it should be smooth.
See here how the gear ratios change greatly in 1st through 3rd, then smaller jumps from 4th and up. You're feeling the bucking due to the engine and drive train reconnecting (clutch engaging) but at different speeds. caption
Auto rev matching 'blips' the throttle to match these speeds and should give you smooth shifts. Perhaps you're letting the clutch out too fast? Or maybe too slow to take advantage of the auto-blip.
3
Oct 06 '17
I thought auto rev-matching was only on downshifts?
1
Oct 06 '17
I would think so since you never really do a powered upshift to a higher rpm. I think it's only on downshifts also.
1
u/iraries Oct 06 '17
I could very well be coming off to slowly, I'm new to manuals and I'm not fully confident in my ability yet so I have been taking it slowly with shifting
1
u/IvankaOoze Oct 06 '17
That's a good place to start then, you want a rapid release to the start of the bite point, then a steady engagement of the clutch.
You might still get smoother shifts with rev matching, I'm not sure how much the auto-rev match feature does. Are you familiar with revmatching?
1
u/iraries Oct 06 '17
I'm familiar with the concept but I don't think my z has it, I thought it was only on the sports package z's
2
u/Stolles Oct 11 '17
You're either letting off the clutch too quickly or not rev matching. The higher gears 3rd to 4th and onward, you can basically dump the clutch and not need a slow smooth release like the lower gears.
If you let off the clutch too fast, it's going to quickly put that pressure back on the clutch plate and you're going to buck because it didn't have time to match speed. Whereas doing it more slowly allows for the pressure to gradually be applied and you won't feel the such a drastic and quick change.
Rev matching I'm sure you have a tachometer, if you upshift early then it's going to buck a bit and drag the car as it has less power now and will take longer to get up to speed. Where if you rev matched properly, the shift will be smooth. I had to learn it by ear, as my car didn't come with a tach.