Possibe FS: Road race shifters

[crxguy]

These were a project for one my engineering classes, and others have expressed interest in them. They bolt onto a steel short throw shifter and produce stock throws, except next to the steering wheel. Here is what the shift pattern looks like in my car:

 

 

Pay no attention to the base, that was a prototype. The final version (that will havea non-marred upper extension) is below:

 

 

I can have a batch of 10 or 20 made, but only if there is enough interest to sell them all. Right now they only bolt to Honda thread pitch, but it could very easily be adapted to other cars. Price would be around 70 dollars shipped, you providing your own short throw shifter (I got my steel one for ~30 on Ebay). So, anybody interested?

[Andrie]

Hi, I have few questions:

 

1. What material is it made from?

2. I assume it is basically two part item, the coupler (or base) and the bent shaft. Is the coupler threaded both sides?

3. Since the bent shaft basically provide a lever arm to torque thread loose, is this ever a problem in testing?

4. Do you have dimension of the parts? I need to know the x and y distance.

[crxguy]

Hi, I have few questions:

 

1. What material is it made from?

2. I assume it is basically two part item, the coupler (or base) and the bent shaft. Is the coupler threaded both sides?

3. Since the bent shaft basically provide a lever arm to torque thread loose, is this ever a problem in testing?

4. Do you have dimension of the parts? I need to know the x and y distance.

 

Its all 6061 Aluminum. The way it all goes together is pretty simple; the base is threaded onto the shifter, then a setscrew goes in from the top (through the base) to press against the shifter. As long as you tighten the base and setscrew down really well, it won't come off. The extension then slips into a smooth hole in the top where a setscrew presses against the extension horizontally.

 

The extension is 7" tall and is bent 2" over. Adding in the base, it probably extends it 7.5" up overall. Since the extension is held in with a setscrew, it can be rotated about the shifter. The extension is bent by myself, so if you wanted something else it wouldn't be hard to do.

 

I have a friend who runs H4 (SE Region) with one of these. Other than his shifter breaking (it was an aluminum Ebay POS, as long as you have steel there isn't an issue), it works flawlessly. I've daily driven with this for over a year now.

 

In case anybody wants to see them in person, I'm at most SE events and VIR when its run in my white CRX.

[Andrie]

I must say, that is a pretty good design and well thought. I much prefer the use of steel or stainless steel for the rod/shaft as like you mentioned the aluminum shifter broke and yourself recommend a steel shifter.

 

I've been thinking of raising my shifter a bit. I run K series, so I had the option of moving the whole shifter box up, or build an extension. Shifting the whole shifter up requires me to move several items I already built, including brake lines and my bias valve.

 

Let me take a measurement to see if this is a possibility for mine. 7" is a little high for my application.

[crxguy]

I must say, that is a pretty good design and well thought. I much prefer the use of steel or stainless steel for the rod/shaft as like you mentioned the aluminum shifter broke and yourself recommend a steel shifter.

 

I've been thinking of raising my shifter a bit. I run K series, so I had the option of moving the whole shifter box up, or build an extension. Shifting the whole shifter up requires me to move several items I already built, including brake lines and my bias valve.

 

Let me take a measurement to see if this is a possibility for mine. 7" is a little high for my application.

 

Thanks

 

The bottom part is the part that I would have made. I still make all the upper parts by hand, so I can make it prett much anything you want (as long as you don't ask for 90* bends )

[drdisco69]

I must say, that is a pretty good design and well thought. I much prefer the use of steel or stainless steel for the rod/shaft as like you mentioned the aluminum shifter broke and yourself recommend a steel shifter.

 

I'm the H4 tester he is referring to, and I love this shifter. You mention preferring to use steel for the extension, which wouldn't hurt, but the place he mentioned mine broke was the base of the threads of the short shifter, not the pieces that he made. The threads of the short shifter are a nasty stress concentration that aluminum is not up to the task of withstanding due to fatigue, but a steel short shifter will do very well. All the parts of the extension are much thicker than the threaded section of the short shifter it threads to, and that combined with it having less of a moment to support means it will probably never be the weakest point along the shifter system. My shifter broke off on a 2-3 shift made in great anger, and probably would have been ok if I hadn't tried to shove it through the firewall.