Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

Is my '85 auto up-shifting correctly? ***video***

Thread Tools
 
Search this Thread
 
Old 10-28-2017, 10:26 PM
  #1  
OTR18WHEELER
You can call me Otis
Rennlist Member
Thread Starter
 
OTR18WHEELER's Avatar
 
Join Date: Feb 2013
Location: Terre Haute, Indiana
Posts: 6,662
Likes: 0
Received 10 Likes on 10 Posts
Default Is my '85 auto up-shifting correctly? ***video***

Poor audio, window halfway down, left hand on the wheel, right hand holding the phone.





Old 10-29-2017, 05:57 AM
  #2  
The Forgotten On
Rennlist Member
 
The Forgotten On's Avatar
 
Join Date: May 2012
Location: Thousand Oaks California
Posts: 4,931
Received 299 Likes on 247 Posts
Default

Upshift points seem normal, even with the rear tires spinning like crazy in yours

They normally shift ~5600-5400 rpm under full throttle.

Maybe time to upgrade the tires.
Old 10-29-2017, 01:31 PM
  #3  
kombatrok
Pro
 
kombatrok's Avatar
 
Join Date: Feb 2010
Location: Portsmouth VA
Posts: 505
Likes: 0
Received 0 Likes on 0 Posts
Default

Seems ok, mine shifts slightly closer to redline maybe...

Are you getting wheelspin at 30+ mph?
Old 10-30-2017, 01:29 AM
  #4  
DeWolf
Three Wheelin'
 
DeWolf's Avatar
 
Join Date: Oct 2004
Location: Australia
Posts: 1,697
Received 44 Likes on 22 Posts
Default

clearly not stock
Old 10-30-2017, 01:40 AM
  #5  
GregBBRD
Rennlist
Basic Site Sponsor
 
GregBBRD's Avatar
 
Join Date: Feb 2005
Location: Anaheim
Posts: 15,221
Received 2,458 Likes on 1,460 Posts
Default

Originally Posted by DeWolf
clearly not stock
If not stock, shifts way too early.

If stock, either despirately needs new rear tires or to not be launched in water.
Old 10-30-2017, 02:04 PM
  #6  
OTR18WHEELER
You can call me Otis
Rennlist Member
Thread Starter
 
OTR18WHEELER's Avatar
 
Join Date: Feb 2013
Location: Terre Haute, Indiana
Posts: 6,662
Likes: 0
Received 10 Likes on 10 Posts
Default

Thanks for the replys, here are the facts...
car is totally stock, (except for tires, and RMB )
Road is dry, asphalt, strait
Tires are sumitomo
255/40 ZR 17 94W (rears)
about 40% tread
limited slip differential
no brake torque used
gear selector in D
rear wheel spin to 50mph
ambient air temp was 45
Old 10-30-2017, 02:11 PM
  #7  
Weissach
Burning Brakes
 
Weissach's Avatar
 
Join Date: Jun 2001
Location: Miami, FL
Posts: 1,152
Likes: 0
Received 1 Like on 1 Post
Default

Take a picture with the car off, to see where the rpm needle sits. The fact that you're odometer works means it's been opened up, needles sometimes get nudged up or down
Old 10-30-2017, 02:29 PM
  #8  
OTR18WHEELER
You can call me Otis
Rennlist Member
Thread Starter
 
OTR18WHEELER's Avatar
 
Join Date: Feb 2013
Location: Terre Haute, Indiana
Posts: 6,662
Likes: 0
Received 10 Likes on 10 Posts
Default

Originally Posted by Weissach
Take a picture with the car off, to see where the rpm needle sits. The fact that you're odometer works means it's been opened up, needles sometimes get nudged up or down
yes, I did replace the gear a few years ago.
It could be off a hair, but the speedometer is correct when compared to roadside speed radars, and my GPS.


Key off^


Key on^


Running at idle^
Old 10-30-2017, 04:45 PM
  #9  
kombatrok
Pro
 
kombatrok's Avatar
 
Join Date: Feb 2010
Location: Portsmouth VA
Posts: 505
Likes: 0
Received 0 Likes on 0 Posts
Default

Wheel spin to 50mph?

I don't doubt you, but I've never heard of anyone with a 32v that wasn't supercharged being able to do anything like that... Mine sure won't with a limited slip and moderately sticky Firestone Firehawks and I have Porkens chip, no cats and a tweaked vacuum/emissions system.

Mine shifts all the way at redline when I have the pedal down. I did have to play around with the bowden cable to get it shifting where I wanted it though.



Quick Reply: Is my '85 auto up-shifting correctly? ***video***



All times are GMT -3. The time now is 11:33 PM.