Shifting into gear while moving???

edub370 · 07-27-2012, 01:53 PM

Quote:

Originally Posted by Davey

Yes, if you double clutch and rev match so the synchros don't have to be overworked, you can downshift into 1st at 30, but if you did that then you won't feel any additional resistance and you wouldn't be posting this thread.

double clutching really hasnt been needed since like the 40's. the advent of synchros eliminated that from common practice. theory being, double clutching matched gear speeds. but now u got synchros to do that for u

robones · 07-27-2012, 02:06 PM

Quote:

Originally Posted by edub370

double clutching really hasnt been needed since like the 40's. the advent of synchros eliminated that from common practice. theory being, double clutching matched gear speeds. but now u got synchros to do that for u

Tward · 07-27-2012, 03:18 PM

What is SRM? Not familiar with that abreviation.
To give you guys the exact scenario i go through every day driving home; my street is off of a highway at which i am going 55 to 60 mph, before i get to the turn, i engage the clutch, put it in 3rd, start braking and when i make the turn begin to release the clutch and continue on my way. Well when i shift into 3rd it feels like there is a massive wall

Davey · 07-27-2012, 03:20 PM

Quote:

Originally Posted by edub370

double clutching really hasnt been needed since like the 40's. the advent of synchros eliminated that from common practice. theory being, double clutching matched gear speeds. but now u got synchros to do that for u

Correct, the synchros do that. And in doing that, they wear out. Especially if you are trying to cram the car into 1st gear at 30 mph, or 2nd gear at 60 mph. The more they have to synchronize the speed due to different rotational speeds, the more they have to work, which is why it's difficult to push the shifter into 2nd at 60 mph, etc.

So you can either not shift into 2nd at 60/1st at 30, or you can double clutch and rev match to assist the synchros and avoid excessive wear, or you can wear out your synchros, it's up to you.

edub370 · 07-27-2012, 03:21 PM

Quote:

Originally Posted by Tward

What is SRM? Not familiar with that abreviation.
To give you guys the exact scenario i go through every day driving home; my street is off of a highway at which i am going 55 to 60 mph, before i get to the turn, i engage the clutch, put it in 3rd, start braking and when i make the turn begin to release the clutch and continue on my way. Well when i shift into 3rd it feels like there is a massive wall

srm = synchro rev match. the system that blips the throttle for u on downshifts on the sport models. wait so 3rd is difficult to get in? i thought it was 1st at speed?

Tward · 07-27-2012, 03:24 PM

I have the nav model, not sport, sorry i didnt clarify that. So i dont have SRM.
In my first post i wasnt really thinking, and was just generalizing, i never use first unless i am starting off.
To make it clear i am basically just asking if down shifting hurts the clutch and flywheel?

kenchan · 07-27-2012, 03:37 PM

Quote:

Originally Posted by Tward

To make it clear i am basically just asking if down shifting hurts the clutch and flywheel?

not if you blip and rev match

robones · 07-27-2012, 04:26 PM

The worst thing you can do for your clutch is depressing it slowly to go into gear. You want the clutch and fly wheel to have a quick and almost immidiate contact at the lowest possible RPM to avoid added wear. The more practice the better you become and the feeling will almost replicate the smoothness of an automatic.

High RPMs shifting and downshifting will prematurely wear the clutch regardless whether or not you rev match.

Footloose301 · 07-27-2012, 04:31 PM

Granny shifting. Not double clutching like you should.

robones · 07-27-2012, 04:32 PM

Quote:

Originally Posted by Footloose301

Granny shifting. Not double clutching like you should.

hadokenuh · 07-27-2012, 05:31 PM

Quote:

Originally Posted by robones

The worst thing you can do for your clutch is depressing it slowly to go into gear....

Can you explain "depressing it slowly to go into gear"? Are you saying it's bad to depress the clutch slowly while in gear?

kenchan · 07-27-2012, 05:33 PM

perhaps he means riding the clutch

hadokenuh · 07-27-2012, 05:34 PM

Quote:

Originally Posted by Davey

So for example if you are on the highway going 60 mph and you take an off ramp with a sharp turn at the end and you say "OK, I will need to be in 2nd for that turn, so I will just push the clutch in now and shift to 2nd at 60 mph" you are going to feel significant resustance and doing this often will cause a lot of wear on your synchros.

So what would be the best way? Turn, then downshift to 2nd and accelerate?

This is what I usually do on sharp turns. The thing I don't like about it is I can't accelerate right away after that.

kenchan · 07-27-2012, 05:36 PM

brake and rev-match downshift to 2nd while straight (setting up for the turn), turn with partial throttle open, once you're through of the apex, open it up.

guys, you are scaring me... you dont know how to drive MT and bought a sports car?!!!

hadokenuh · 07-27-2012, 05:43 PM

Quote:

Originally Posted by kenchan

brake and rev-match downshift to 2nd while straight (setting up for the turn), turn with partial throttle open, once you're through of the apex, open it up.

guys, you are scaring me... you dont know how to drive MT and bought a sports car?!!!

Lol I'd like to take turns at 40+mph if possible

But yeah, I learned to drive MT on this car so there are lots of things I still need to learn.

07-27-2012, 03:18 PM	#18 (permalink)
Tward Enthusiast Member Join Date: Feb 2011 Location: North Little Rock, AR Posts: 318 Drives: 09 Nissan 370z BS M6 Rep Power: 14	What is SRM? Not familiar with that abreviation. To give you guys the exact scenario i go through every day driving home; my street is off of a highway at which i am going 55 to 60 mph, before i get to the turn, i engage the clutch, put it in 3rd, start braking and when i make the turn begin to release the clutch and continue on my way. Well when i shift into 3rd it feels like there is a massive wall __________________ Nismo S - Tune Body Kit/ UAM Fenders / Fast Intentions CBE 12/ Stillen CAI/ PWD JDM Shift Knob/BlueBat Vinyl' R.I.P Garrett Uekman

07-27-2012, 03:24 PM	#21 (permalink)
Tward Enthusiast Member Join Date: Feb 2011 Location: North Little Rock, AR Posts: 318 Drives: 09 Nissan 370z BS M6 Rep Power: 14	I have the nav model, not sport, sorry i didnt clarify that. So i dont have SRM. In my first post i wasnt really thinking, and was just generalizing, i never use first unless i am starting off. To make it clear i am basically just asking if down shifting hurts the clutch and flywheel? __________________ Nismo S - Tune Body Kit/ UAM Fenders / Fast Intentions CBE 12/ Stillen CAI/ PWD JDM Shift Knob/BlueBat Vinyl' R.I.P Garrett Uekman

07-27-2012, 04:31 PM	#24 (permalink)
Footloose301 A True Z Fanatic Join Date: Apr 2010 Location: Naples, FL Posts: 2,659 Drives: 40th Rep Power: 21	Granny shifting. Not double clutching like you should. __________________ 2010 40th Anniversary 370Z

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07-27-2012, 04:26 PM	#23 (permalink)
robones Enthusiast Member Join Date: Mar 2011 Location: Miami Posts: 357 Drives: 2011 - Nissan 370 M6 Rep Power: 14	The worst thing you can do for your clutch is depressing it slowly to go into gear. You want the clutch and fly wheel to have a quick and almost immidiate contact at the lowest possible RPM to avoid added wear. The more practice the better you become and the feeling will almost replicate the smoothness of an automatic. High RPMs shifting and downshifting will prematurely wear the clutch regardless whether or not you rev match.

07-27-2012, 05:33 PM	#27 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	perhaps he means riding the clutch

07-27-2012, 05:36 PM	#29 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	brake and rev-match downshift to 2nd while straight (setting up for the turn), turn with partial throttle open, once you're through of the apex, open it up. guys, you are scaring me... you dont know how to drive MT and bought a sports car?!!!