Improved shifting for side shifters, bolt on? Maybe., Experimenting tonight. |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Improved shifting for side shifters, bolt on? Maybe., Experimenting tonight. |
Dr Evil |
Apr 14 2014, 10:14 PM
Post
#1
|
Send me your transmission! Group: Members Posts: 23,034 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
I have had this though for a long time to try and remove as much slop as I can in the shifting system. The tail shifter is a bit trickier, but not impossible. I have a side shifter in my new 914 and so, while I build up a transmission for it to drive to Hershey this weekend (this will be the raffle transmission, BTW. Trial by fire!), I decided to see how simple it would be to remove some of the slop.
First, see how much of a gap there is between the shift selector comb and the rod. This is a huge amount so any bit that can be removed should be an improvement. Step one was to add material to the sides of the comb faces (Yes, Scotty, I welded). Then, I hand filed the faces and re-formed them to a specific profile. The metal that was added was hardened and a real bitch to file. I figured it was worth it. The end result was a much tighter fit. There are a few parameters that I will not go into that need to be respected to get this to work, but the preliminary results were nice on the bench. With the material added and profiled on the faces, the stick throw fore and aft to select gears decreases significantly. There is still refinement that needs to be done on the profile, but so far the preliminary results are encouraging. Next, I will build a jig so I can directly observe and adjust my profile. And I will also be able to see where I can add material to take up the slack that one feels when they are in gear and can wiggle the stick back and forth. Once I get this prototype done and tested, I can do this treatment to any side shift console on an exchange basis and it will be a quick bolt on improvement (I hope). (IMG:style_emoticons/default/happy11.gif) |
Dr Evil |
Sep 6 2014, 05:22 PM
Post
#2
|
Send me your transmission! Group: Members Posts: 23,034 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
OK, I have some great news! Unfortunately my 2006 mini cooper S died a most horrible death due to oil pump failure (my primary diagnosis) which has rendered the engine no good. This has prompted me to get the 914 street legal (inspected) as I need a car sometimes. So, while I was chasing down a speedo issue which turned out to be the wrong angle drive on the tranz, I changed the speedo cable and decided to install the short shift kit. I already love the short shift kit and would fully recommend such as an upgrade that is bolt on, but coupled with the rebuilt tranz and my little modification the shifting is so good it is freaky! I need to find another 914 driver local, with RUNNING car experience that could drive it and give an independent observation.
I still need to put a shim of yet undetermined thickness on the part of the rod that is on the outside of the shift console. This will protect against missing first due to over extension when moving stick to the left. JMalone is gonna be one happy SOB if he puts this in with a short shifter. IF not, he will still be really happy, but WOW. I need to mount my phone above the shifter and take a vid. It feels as good as a cable shifter and almost gated feel as well. |
HalfMoon |
Sep 6 2014, 07:46 PM
Post
#3
|
Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
OK, I have some great news! Unfortunately my 2006 mini cooper S died a most horrible death due to oil pump failure (my primary diagnosis) which has rendered the engine no good. This has prompted me to get the 914 street legal (inspected) as I need a car sometimes. So, while I was chasing down a speedo issue which turned out to be the wrong angle drive on the tranz, I changed the speedo cable and decided to install the short shift kit. I already love the short shift kit and would fully recommend such as an upgrade that is bolt on, but coupled with the rebuilt tranz and my little modification the shifting is so good it is freaky! I need to find another 914 driver local, with RUNNING car experience that could drive it and give an independent observation. I still need to put a shim of yet undetermined thickness on the part of the rod that is on the outside of the shift console. This will protect against missing first due to over extension when moving stick to the left. JMalone is gonna be one happy SOB if he puts this in with a short shifter. IF not, he will still be really happy, but WOW. I need to mount my phone above the shifter and take a vid. It feels as good as a cable shifter and almost gated feel as well. (IMG:style_emoticons/default/biggrin.gif) Guess I wouldn't have to worry about shimming for first gear, eh? (IMG:style_emoticons/default/popcorn[1].gif) |
Lo-Fi Version | Time is now: 28th December 2024 - 01:16 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |