Race Car Tech Discuss anything related to road racing and auto X.

mmm looking to improve shifting

Old 12-04-07, 11:48 PM
  #1  
Rotary Enthusiast
Thread Starter
iTrader: (36)
 
rotary#10's Avatar
 
Join Date: Aug 2005
Location: Oakland, CALI = O
Posts: 868
Received 7 Likes on 7 Posts
mmm looking to improve shifting

mmm im not sure where to post this but the parts are set for the track.
i have a 91 n/a rx7 with a 12lb racing Beat flywheel and a ACT street and Strip clutch... i have been able to shift well. about 3 smooth shifts today. but some were jerky and Im looking to some advice from the folks here on how to improve on that. Im all open ears
rotary#10 is offline  
Old 12-05-07, 12:22 AM
  #2  
Lives on the Forum
10 Year Member
 
Black91n/a's Avatar
 
Join Date: Sep 2003
Location: BC, Canada
Posts: 5,707
Likes: 0
Received 1 Like on 1 Post
How are your drivetrain mounts? How about the driveshaft U joints and half shaft CV joints? Slop in the driveline can make it hard to be smooth.

Subarus are bad for that, they use really soft mounts and it's really easy to be jerky with them.
Black91n/a is offline  
Old 12-05-07, 12:24 AM
  #3  
Rotary Enthusiast
Thread Starter
iTrader: (36)
 
rotary#10's Avatar
 
Join Date: Aug 2005
Location: Oakland, CALI = O
Posts: 868
Received 7 Likes on 7 Posts
thanks Black91n/a i'll check my hanyes manual and read up on it and check those out tomorrow.
rotary#10 is offline  
Old 12-05-07, 09:56 AM
  #4  
The Silent but Deadly Mod
iTrader: (2)
 
Roen's Avatar
 
Join Date: Aug 2003
Location: NYC/T.O.
Posts: 4,045
Likes: 0
Received 1 Like on 1 Post
understand the basics of rev matching both up and down
Roen is offline  
Old 12-05-07, 01:57 PM
  #5  
Lives on the Forum
10 Year Member
 
Black91n/a's Avatar
 
Join Date: Sep 2003
Location: BC, Canada
Posts: 5,707
Likes: 0
Received 1 Like on 1 Post
That too, but the rest will still help. If the mounts are stock still then they're probably old, oil soaked and weak, sagging or broken anyway, and should be replaced. If you do replace them then I reccomend the Mazda comp ones, they look like stock but are stiffer. You'll notice the extra stiffness, but I don't find that they transmit any more vibrations really.
Black91n/a is offline  
Old 12-05-07, 02:39 PM
  #6  
The Silent but Deadly Mod
iTrader: (2)
 
Roen's Avatar
 
Join Date: Aug 2003
Location: NYC/T.O.
Posts: 4,045
Likes: 0
Received 1 Like on 1 Post
Second Mazdacomp,

I have Mazdacomp engine, tranny and front diff mounts......they feel like the same as stock.
Roen is offline  
Old 12-10-07, 01:18 AM
  #7  
Rotary Enthusiast
Thread Starter
iTrader: (36)
 
rotary#10's Avatar
 
Join Date: Aug 2005
Location: Oakland, CALI = O
Posts: 868
Received 7 Likes on 7 Posts
thats what im running with on my fc. from mazdatrix i got the comp motor, tranny and rear end.. turns out its just me.. although im getting the better sense of rev matching so as not to over rev the engine. but im getting a better feeling of the car as i drive it more. i guess somethings get better with age... haha but not all..
rotary#10 is offline  
Old 12-10-07, 09:11 AM
  #8  
The Silent but Deadly Mod
iTrader: (2)
 
Roen's Avatar
 
Join Date: Aug 2003
Location: NYC/T.O.
Posts: 4,045
Likes: 0
Received 1 Like on 1 Post
practice makes perfect.....the key to smooth shifts is to be as accurate with the throttle as possible, while minimising time on the clutch so that the car downshifts smoothly, as well as being patient but accurate with the clutch on upshifts.
Roen is offline  
Old 12-10-07, 11:15 AM
  #9  
Moderator
iTrader: (7)
 
dgeesaman's Avatar
 
Join Date: May 2002
Location: Fort Kickass
Posts: 12,298
Likes: 0
Received 4 Likes on 4 Posts
What aspect of shifting are you looking to improve? Does it grind? Does the shifter not want to slide into the gear you're looking for? Is the car lurching too much? These are all different issues.

Are you holding the shifter **** with correct technique?

Dave
dgeesaman is offline  
Old 12-10-07, 09:11 PM
  #10  
Panda Bear
10 Year Member
iTrader: (4)
 
Turbo23's Avatar
 
Join Date: Nov 2001
Location: Lititz, PA
Posts: 1,724
Likes: 0
Received 0 Likes on 0 Posts
You need a shifter like mine! It will fix all your problems, including cancer.

Turbo23 is offline  
Old 12-10-07, 09:54 PM
  #11  
Lives on the Forum
10 Year Member
 
Black91n/a's Avatar
 
Join Date: Sep 2003
Location: BC, Canada
Posts: 5,707
Likes: 0
Received 1 Like on 1 Post
I've been thinking of doing that myself, short shifter plus extension rod right? You'd need the short shifter to keep the throws from being too big (maybe smack your hand on the dash).

Extensions are available here: http://miataroadster.com/interior.html
Black91n/a is offline  
Old 12-13-07, 06:17 PM
  #12  
Panda Bear
10 Year Member
iTrader: (4)
 
Turbo23's Avatar
 
Join Date: Nov 2001
Location: Lititz, PA
Posts: 1,724
Likes: 0
Received 0 Likes on 0 Posts
i just used a engine dowel pin on a mazdatrix short shifter. Works great, throw isnt long, and everyone givess me the "wtf" face all the time
Turbo23 is offline  
Old 12-13-07, 09:54 PM
  #13  
GET OFF MY LAWN
10 Year Member
iTrader: (1)
 
jgrewe's Avatar
 
Join Date: Feb 2005
Location: Fla.
Posts: 2,838
Likes: 0
Received 0 Likes on 0 Posts
Which ACT clutch( model number) do you have? Does it have springs in the disc or is it a puck type? No springs or a four or six puck clutch will force you to work hard at being smooth. Both designs transmit forces NOW and make the clutch feel more like an on/off switch.
jgrewe is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
distr0
Canadian Forum
3
10-07-15 08:17 AM
Rotafuzz
New Member RX-7 Technical
3
09-30-15 09:55 AM


Thread Tools
Search this Thread
Quick Reply: mmm looking to improve shifting


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: