Nissan 370Z Forum  

7speed---6speed

There are two separate components to the shift speed issues people bring up: control input lag and actual shift execution time. Control input lag is the one that's pretty constant,

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain


 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 12-01-2011, 01:15 PM   #13 (permalink)
A True Z Fanatic
 
wstar's Avatar
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
Rep Power: 3596
wstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond repute
Default

There are two separate components to the shift speed issues people bring up: control input lag and actual shift execution time. Control input lag is the one that's pretty constant, and annoying in low gears. You have to predictively click the button a bit ahead of time if the RPMs are rising very quickly in 1st or 2nd gear. In higher gears the RPMs are moving slowly enough that it's not a significant factor.

As far as actual shift execution time goes, the primary determinant is really engine RPM. The higher your RPMs are the more reliably quick the shift is. It's really a non-issue when driving the car hard, but it can feel a little slow down at pedestrian RPMs.

I've played with the UpRev 7AT torque-map (line pressure) stuff endlessly. If you set the values too high, the shifts get jerky (which isn't a good thing, it just upsets the car's balance and shocks the drivetrain). If you set them too low, the transmission doesn't achieve lockup (or doesn't achieve it as quickly), and you'll lose power and slowly lose your transmission to excess wear. The right value is determined by the power the engine is making. Setting it higher than necessary doesn't help it shift any faster.
__________________
7AT Track Car!
Journal thread / Car setup details
wstar is offline   Reply With Quote
 

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Looking for 10/11,blue roadster, 6speed Zrider79 Nissan 370Z Dealer Inventory 1 09-10-2011 01:04 PM
FS: '09 G37 Coupe 6speed $32k da mayor Other Vehicle For sale 3 05-19-2011 07:19 PM
WTB: 09 370Z 28k max 6Speed TX marcelo929 370Z For Sale 0 11-17-2010 01:58 PM
z34 6speed trans bolt pattern 1uk32 Engine & Drivetrain 1 12-29-2009 08:53 AM
NEW OWNER! 370z sport 7speed AT oo7mech New 370Z Owner 15 12-17-2009 08:38 AM


All times are GMT -5. The time now is 05:40 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2