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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 ****. 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 **** 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 **** 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
Last edited by lfl215l; 05-02-2021 at 01:54 PM.
Reason: Update
05-02-2021, 01:34 PM
