Thanks, definitely interesting.

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Henry

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I went for a short drive and liked it a lot. I would be nice to try the 2mm springs for comparison. It would probably be an easy swap to change out the springs if you wanted to.

My previous stock shifter had the seine short shift which had spring centering. It was flimsy compared to this. I feel a huge difference in the movement, which makes for precise and deliberate shifting. The resistance and the quick centering action of the 2.5mm springs helps me. The 2mm spring is going to feel better for someone who isn’t looking for that stiffness.

Just fitted the Numeric shifter to my ‘73 911. The fitting process is not difficult, it’s exactly as shown in the video on their website. The only tricky bits are the adjustment and fitting the standard gear knob. If you have the done the adjustment with the standard set up then you know it takes a few goes and lots of trial and error. With the Numeric shifter it’s the same trial and error process but the adjustment is much finer. I got on better when I marked my setting with paint so that I could see how far I had moved it. I got a good enough set up static that worked well driving. I had to shorten the gear knob by 15mm to get it to sit far enough down on the lever for the crush ring to engage. The round section on the lever is 35mm long and the tube inside the knob is 58mm with a step at the top where the crush ring sits. I fitted a standard rubber gaiter. It needed warming up with a heat gun and then slipped over quite easily.
My previous set up was a UJ and Seine gate. Shifting was OK, better when warm. In 2nd I had quite a lot of high pitched chatter from the shifter tube improved a lot by adding fishing weights to the tube with hose clips. I just did a transmission oil change from Kendall to Motul and it reduced the noise a bit more.
The Numeric shifter is completely different. It is very precise, a very short throw and as quick as I think you could get with a 915. Double de-clutching is easy as the spring setting takes the lever easily into neutral. The transmission noise has almost disappeared completely. Downsides: getting used to a completely different gear change experience. I’ve used 915 gearboxes for a bit more than 35 years and getting used to this takes a little while. I haven’t perfected it yet but I would not go back!
The other thing is that it does take quite a lot of physical effort to make the gear shifts. I am going to have a play with extensions to see if there is a sweet spot but I can live with it as it is now and I am sure with more miles I will get used to it. Overall very impressed with the quality and really enjoying the driving experience.
HTH
Steve

PS I have no connection with Numeric Racing just a new customer of theirs

Steve, what is your impression of the stiffness with the 2.5mm spring, or would you have preferred a lighter move between shift planes with the 2mm?

-Scott

Installed mine in my 78 yesterday morning at my shop before getting getting onto customer jobs.

The shifter installed very easily, having an arbor press was great for installing the shift rod bushing into its holder as it holds it square vs using a bench vice. One note about install, the screws for the shift rod bushing holder on my car where shouldered and not fully threaded causing them to not clamp down properly on the thinner flanged Numeric shifter. I just replaced them with fully threaded allen bolts.

Shifter is literally amazing, it does need more muscle to select gears as the leverage ratios have to be changed to make it a shorter throw but it is not excessive. The stiffer centering spring is the go to my opinion.

What I can't believe is how bad the stock shift coupler is. The car is new to me as of a couple months ago and I have a receipt from the previous owner for a new stock coupler that was installed shortly before I bought it and the slop in the factory new one I removed is incredible.

It just takes a drive or two to get used to the shorter throw, it is a much tighter pattern. I’m no expert but I can appreciate the thought and engineering that went into creating this.

I drove into the shop today so I took a photo for the thread.https://uploads.tapatalk-cdn.com/202...431770af7c.jpg

Sent from my Armor 9 using Tapatalk

@Scott difficult to judge the difference between the 2.5 and 2mm springs without trying both. I really like the positive centering from the 2.5mm springs.
I just fitted a 30mm extension to the lever which works really well for me as it reduces the shifting effort and extends the length of the shift. I am really pleased with it now just need to get out and drive
Steve

I have to say there are a lot of aspects I like about the design of this shifter and a few I don't.

Mechanically it looks like a great design. I like the spring setup and the bearings at the pivots. I would like to see a detailed view of how the reverse lockout functions as I haven't been able to get a good view from the pictures that have been posted so far. the machining and attention to detail looks phenomenal, though I'd probably still ring the factory boot and wouldn't be able to see it.

Cosmetically I like a more traditional round profile to the shift lever. I would like to see an extended lever option without having to use a dedicated sift knob, or a joint in the middle where an extension is sandwiched in, and you end up with a square to round profile change half way up the shift lever.

I'm currently running a +2" Rennshift, but have never been overly enthusiastic about the design of the reverse lockout. I'm running the standard spring loaded lockout not the manual one as I am running the factory boot and wouldn't have access to the manual version when I need to get to reverse. Would love to give the Numeric Shifter a try, but can't justify the spend

Well, I literally have one of each of the top end shifters, sadly because of circumstances beyond my control, my 914 is going to be longer getting back together than I thought when I ordered the shifter, and the SC is behind that. Comparing this shifter to my Rennshifter, adding in the coupler, I'm willing to let the Rennshifter go and purchase one of these for my 78 SC.
I really can't wait to put this head to head with my Wevo. When you look at the total value, with the shift coupler, and and company behind it, you really can't go wrong.

What extension did you put on it? Any pics?

I know they are coming out with an extension but it will require, from what I understand, a proprietary knob.

There is an M5 female thread in the top of the shifter so I made the extension from a piece of 15mm rod, drilled a hole down the middle and connected it with a countersunk M5 bolt.http://forums.pelicanparts.com/uploa...1620359193.jpg

The installation video show the reverse lockout, which is adjustable, it is at 10.40 mark in the video.


https://youtu.be/7cR2Y1Je2ro

Reverse lockout

http://forums.pelicanparts.com/uploa...1620428629.jpg

In the video right after the reverse lockout, he talks about installing the main shift rod bushing. Removal of the shift rod “head” (the big metal cup that holds the shifter ball bushing) typically does not come off as easy as his did. That head has a precision machined fit onto the end of the shift rod. It only takes a little bit of corrosion to make removing the head a real pain in the arse. Do yourself a favor and swipe a little bit of grease on the machined rod end before reinstalling the head. The next dude working on the head should be thankful

A suggestion for Numeric. How about cutting a small shallow radius into the top of the housing in 1 place to allow for easier pin installation. It looks like maybe 1/16" +or- is all that is required. Holding those two steel sleeves in place while twisting the shift rod to align the holes was a bit of a PIA. Otherwise everything else looks great, hope to get it installed tomorrow.

That is why I posted about a a drop of glue on the outside of the sleeves to hold them in place, worked great for mine.

Maybe I got lucky, I didn’t have a problem with this, the lever held the sleeves in place and I was able to to rotate the assembly just enough with one hand to slip the pin in with the other.

After watching the Numeric Racing install a few times to prepare, I also had this go well - was straightforward and this first assembly step can be done without glue or a groove. Took about 2 minutes. I would just suggest watch the video and one can prepare for the effect of gravity and accommodate the tight tolerances to install the pin.

Getting to the actual install and connection to the shifting mechanism will probably take a week or two... car is on jack stands at the moment.