Hi all,
I wanted to share a project I completed over the weekend. I have been having issues with a swinging tach on my 911 for a while now...I contemplated having it rebuild by NHS but opted to go a different route. I purchased a GR4.5-TACH-02-DM from SpeedHut and proceeded to wait a few weeks for the tach to come in.
First impressions, the tach is fantastic looking, matches the original gauges quite well, and they even had the option (not listed on their order form) to add high beam and turn signal indicators on the gauge.
The gauge is slightly smaller than the VDO it replaced but you cannot notice a discernible difference in the overall diameter once installed.
First, I needed a way to mount the tach into the existing hole in the dash, and wanted to use the same mounting as the OE VDO. Drew up a quick adapter ring in SolidWorks and then RP'd the piece.
Once that was done, there are small nubs on the "spin ring" that needed to be filled flush with the adapter ring in order for the original rubber grommet to slide over and seat properly.
Final installation:
Sorry for the poorly lit pictures, I will take more once the sun is in the correct position.
The gauge also features programmable shift lights and can be used with stock distributor ignition or a signal from an ECU (AEM Infinity in my case). I do not have anything with it operating as I am still in the process of wiring my engine and ECU package. I will also post more pictures of the actual assembly a bit later today.
Just thought I would share, I'm really pleased with the results.
