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New Manual Shifter Design

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Old 08-18-2016, 01:06 PM
  #16
hans14914
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Prototype is finished. I see a couple areas for improvement before switching over to aluminum. I think I may print a new bearing housing today and try testing a plastic Igus bearing in there too. That would really help with the vibration isolation. There is a bit of play in this ball bearing, not a ton, but think it may actually be more constrained with a plastic bearing, we will have to see.

I am going to try and get it on a torque tube this weekend, and test the shifting out of the car. If all looks good, we will move on to beta testing in the car.








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Old 08-18-2016, 01:22 PM
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Old 08-18-2016, 04:02 PM
  #18
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I'm in ! ......I spend wisely.......that looks like the best one yet
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Old 08-18-2016, 05:28 PM
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Originally Posted by Hacker-Pschorr View Post



HAHAHAHAHA so true
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Old 08-18-2016, 06:06 PM
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Hans what about the motor mounts? Is that a dead project?
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Old 08-19-2016, 10:28 AM
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Cool, functionally very similar to this design which looked good but died when the maker disappeared after the prototype.

https://rennlist.com/forums/928-foru...er-design.html

(Brendan posted about the prototype)

Nice improvement adding the adjustability for throw - good to cater for tastes - especially if the shims can be added/removed without dropping the TT.

Your stuff always makes me want to go buy a 3d printer
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Old 08-19-2016, 10:56 AM
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There was a young machinist from boston that had already made a couple of these up and had one installed and working in his OB. Did you somehow manage to get his plans? He fell off the face of the earth right as we was gauging interest in a production run of them.

Regardless, I like the idea.

Looks remarkably like THIS ONE
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Old 08-19-2016, 12:17 PM
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I agree, the design I propose is quite similar to that design. Its an elegant way of maintaining the stock linkage geometry. There are some differences with the shim system, and I also plan on using a stainless bracket to tie into the old front rod support to keep the clamp from moving.

This design could go to the machine shop on Monday if it tests well this weekend. If anyone has an issue with the similarity to previous designs, I can make something completely different, but given the current workload, I may not be able to get it done for a month or so.
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Old 08-19-2016, 12:29 PM
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Looks good Hans, do it!!


The transmission / TT is coming out of my 79 track car soon, so put me on the list for testing if you need more data points.
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Old 08-19-2016, 02:06 PM
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Originally Posted by hans14914 View Post
If anyone has an issue with the similarity to previous designs
I doubt that anyone has an "issue." While the previous design looked promising, it's been dead for about five years. There are only so many ways to reinvent the wheel....

James
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Old 08-19-2016, 03:39 PM
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Hell yeah, in the words of Nike "Just Do It!"
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Old 08-19-2016, 03:50 PM
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I agree with sponge Bob- Er Hacker.. Just take it.
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Old 08-19-2016, 03:59 PM
  #28
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Originally Posted by hans14914 View Post
I agree, the design I propose is quite similar to that design. Its an elegant way of maintaining the stock linkage geometry. There are some differences with the shim system, and I also plan on using a stainless bracket to tie into the old front rod support to keep the clamp from moving.

This design could go to the machine shop on Monday if it tests well this weekend. If anyone has an issue with the similarity to previous designs, I can make something completely different, but given the current workload, I may not be able to get it done for a month or so.
No issue, was just wondering if you'd been in contact with him about it to continue on with what he was trying to put out to the community. I'm glad something like it will see the light of day. I was really eager to get my hands on one of the other setups.

Do you plan on offering a shifter that's not of the rectangular/flat design like the OE ones for those of us that want to run generic Momo style shifters without having to use that foolish and slopppy adapter? Your design makes it look like that could be an option and easily interchangable.

Does yours utilize the same bushing dimensions of a stock shifter, in case one didn't want the height adjustability? or to keep the cost lower?
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Old 08-24-2016, 03:39 AM
  #29
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Test fitting of the shifter and the action on the test assembly has gone really well. I decided to take the design a bit further. With the deletion of the front rod, I thought I should probably make a mold to cast a new foam insulation block for the new design. This illuminated a latent issue with the arms hitting the insulation. So, the arms have been re-designed and contoured to clear the new foam part.

I also decided to re-design the rear shifter link and trans coupler. One thing I disliked is having to make the adjustment at the rear under the car. The new link will be threaded at the front so both the link length and shifter resting angle can now be adjusted without getting under the car. The coupler will be a modified steering universal joint with sealed needle bearings to remove all backlash. This also eliminates the need to have the pain-in-the-butt boot over the coupler. A simple bellow can be installed on the trans before sliding the coupler on. I also will change the set-screw to a traditional cap screw so it can actually be removed without stripping.

The new rear link will also be compatible with a stock shift lever.

Here are some quick previews of the foam insulation pad and the revised shifter arms.

I am waiting for a quote from Apex on their universal joints before finalizing the design with the current front runner.

Hoping to have parts for show and tell at Frenzy.






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Old 08-24-2016, 11:13 AM
  #30
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Hans, you are one talented son of a gun. Looks great.
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