New Manual Shifter Design - Rennlist Discussion Forums



New Manual Shifter Design

Reply
 
Thread Tools Search this Thread
Old 08-15-2016, 02:38 PM   #1
hans14914
Addict
Rennlist Member
Thread Starter
 
hans14914's Avatar
 
Join Date: Aug 2003
Location: Indianapolis
Posts: 2,220
Default New Manual Shifter Design

I have been digging out some of my old projects recently, and I went back and updated an old shifter design. Some of you may notice some of my old design in there, as well as some influences from past designs.

The shift lever itself is completely compatible with stock linkage, and can be installed without dropping the torque tube. What makes it different from any of my previous designs, or any that I am aware of, is that it allows for shortening the actual lever in 10mm increments from stock height to 30mm shorter. The pivot point can be adjusted from stock to any increase in ratio in 10% increments by using machined 2.5mm spacers (stock pivot distance is roughly 25mm). I measure that you may start hitting the torque tube at any pivot point beyond 50% reduction, but I will need to test this in the real world. It may be possible to add additional adjustment by raising the front pivot point. It would be possible to do this with similar shims by separating the bearing block from the clamp in the front--rod removal system as shown.

There are some other small updated, including replacing the stock shifter pivot bushings with uprated Igus bearings for increased isolation and less friction.

I am printing test parts today to check clearances and make sure everything works as intended. I will keep everyone posted as to progress.

If all works out well, i will machine a test level and toss it in the GTS-4 for some real world testing.

Here is the webviewer model for those who are interested in taking an in-depth look:

http://cloudviewer.spaceclaim.com/12...0702510f2.html








hans14914 is offline   Reply With Quote
Old 08-15-2016, 03:57 PM   #2
ltoolio
Addict
Rennlist Member
 
ltoolio's Avatar
 
Join Date: Mar 2015
Location: Lisle, IL
Posts: 1,285
Default

ltoolio is offline   Reply With Quote
Old 08-15-2016, 03:59 PM   #3
Ducman82
Quacker McBoobs
Rennlist Member
 
Ducman82's Avatar
 
Join Date: Nov 2009
Location: San Pedro CA
Posts: 6,581
Default

Another thing you make that i need........
Ducman82 is offline   Reply With Quote
Old 08-15-2016, 04:15 PM   #4
Livio928
Addict
Rennlist Member
 
Livio928's Avatar
 
Join Date: May 2003
Location: Hamilton, Ontario, Canada
Posts: 652
Default

Hi Hans,

Just a curious question... Why would i want to adjust for variable heights of the shifter handle. Does it feel differently or solve any specific issues between the stock and the shortened shifter? I have the short shifters on both of my 5 spds and I do find the through is tighter but feels more notchier. Would this allow for me to find an in-between area of long smoother throw and shorter notchier feel?
Livio928 is offline   Reply With Quote
Old 08-15-2016, 04:37 PM   #5
hans14914
Addict
Rennlist Member
Thread Starter
 
hans14914's Avatar
 
Join Date: Aug 2003
Location: Indianapolis
Posts: 2,220
Default

Livio,

There are two adjustments in this design. One is to change the overall height of the shifter ****. The second is for the lower pivot point. Increasing the distance between the two pivot points will reduce the throw. By using a stack of shims, each shim inserted will reduce total throw by 10%.

By shortening the **** and increasing the throw, you can create whatever the best shift geometry is right for your driving preference.

With existing designs, there are fixed throw reductions, and there is no ability to change this in the car.
hans14914 is offline   Reply With Quote
Old 08-15-2016, 04:45 PM   #6
hans14914
Addict
Rennlist Member
Thread Starter
 
hans14914's Avatar
 
Join Date: Aug 2003
Location: Indianapolis
Posts: 2,220
Default

After receiving some very helpful feedback (thanks Colin), I modified the front clamp to be two pieces. The bearing is now located 12.5mm higher than stock, so is centered at the 50% reduction point. Having it a separate part allows for installation of shims for even more aggressive throw reductions in the future if necessary. This design assumes that anyone who would drop the tube to install the front rod replacement bearing would likely want aggressive shift geometry.

Here is a picture with the modified bearing block, and 50% reduction shims installed and the shifter height dropped to a position 7.5mm below stock lever height (the overall height reduction is limited as the bearing has moved up 12.5mm - this would be easy to modify by including a shorter shifter lever with the front bearing upgrade.)

hans14914 is offline   Reply With Quote
Old 08-15-2016, 11:18 PM   #7
SwayBar
Addict
Rennlist Member
 
SwayBar's Avatar
 
Join Date: Feb 2006
Location: Chicago Bears
Posts: 1,333
Default

I am certainly interested in this.

Any idea on timeline?
SwayBar is offline   Reply With Quote
Old 08-15-2016, 11:34 PM   #8
RFJ
Addict
Rennlist Member
 
RFJ's Avatar
 
Join Date: May 2010
Location: SW FL
Posts: 914
Default

Din-o-mite This looks great ,I believe I would be in for at least one. Ray
RFJ is offline   Reply With Quote
Old 08-15-2016, 11:54 PM   #9
davek9
Addict
Rennlist Member
 
davek9's Avatar
 
Join Date: Jul 2006
Location: Bloomfield, MI
Posts: 3,626
Default

Looks good Hans, nicely done.
I'm in for one, still love n you're speakers

Dave
davek9 is offline   Reply With Quote
Old 08-16-2016, 12:27 AM   #10
hans14914
Addict
Rennlist Member
Thread Starter
 
hans14914's Avatar
 
Join Date: Aug 2003
Location: Indianapolis
Posts: 2,220
Default

A couple last minute updates this evening before leaving the office. Prints should be done when I get in tomorrow so I can see how it feels in hand.

I removed alot of the unnecessary material from the bottom to allow for more clearance at higher pivot spacign.

I also re-designed the front pivot arm for reduced size to help with fit under the foam if the bearing block was spaced tall.

Finally, I removed 2.5mm of height from the bearing housing, so the default height with the front rod delete is centered at 30% reduction in throw, and I will just machine a stack of 2.5mm spacers for the bearing to match the shifter lever spacers. This way, the bearing block can be spaced the same as the shifter so much of the standard bind, experienced from standard short-shift designs, can be removed.

Here are a couple screen shots:




hans14914 is offline   Reply With Quote
Old 08-16-2016, 12:33 PM   #11
Chris Lockhart
Addict
Rennlist Member
 
Chris Lockhart's Avatar
 
Join Date: May 2001
Location: Taylors, S.C.
Posts: 1,603
Default

Damn nice Hans.
Chris Lockhart is offline   Reply With Quote
Old 08-16-2016, 05:32 PM   #12
DKWalser
Addict
Rennlist Member
 
DKWalser's Avatar
 
Join Date: Oct 2013
Location: Mesa, Arizona, USA
Posts: 432
Default

What I cannot understand is why Hans is working on this when there is a critical shortage of Hans T-shirts! We need priorities people!

/sarcasm
DKWalser is offline   Reply With Quote
Old 08-17-2016, 07:18 AM   #13
Bilal928S4
Addict
Rennlist Member
 
Join Date: Apr 2011
Location: New Canaan, CT
Posts: 2,835
Default

Quote:
What I cannot understand is why Hans is working on this when there is a critical shortage of Hans T-shirts! We need priorities people!
I totally agree, especially as this will not work with a rogerbox.
Bilal928S4 is offline   Reply With Quote
Old 08-17-2016, 05:21 PM   #14
atb
Addict
Rennlist Member
 
atb's Avatar
 
Join Date: May 2001
Location: Puyallup, WA
Posts: 4,798
Default

Is the head of front mounting bolt (green w/bearing) accessible through the shifter tunnel opening?
atb is offline   Reply With Quote
Old 08-17-2016, 05:41 PM   #15
RFJ
Addict
Rennlist Member
 
RFJ's Avatar
 
Join Date: May 2010
Location: SW FL
Posts: 914
Default

If I remember right there was a guy from mass. that was on to a design very similar to this and he never came back so this will be a sure winner,I really like this design if I could afford a milling machine I would have done this long ago,just keep going!!!
RFJ is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2014 991 c2 with great options CPO 991carrerac2 Vehicle Marketplace 1 04-20-2017 05:59 PM
FS: Smoked LED tail lights for 997.1 from Maxspeed Motorsports Nate Tempest Parts Marketplace 3 03-10-2017 05:26 PM
Porsche Tysons Brunch - Panamera Dan Nagy 991 4 02-28-2017 01:35 PM
WTB: Fan knob surround for HVAC controller traxtar928 928 Forum 0 02-21-2017 06:21 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -3. The time now is 09:46 AM.


Copyright ę 1998 - 2017 Rennlist.com
 
  • Ask a Question
    Get answers from community experts
What's your question?
Send