Zetecinside Race Shop
These are the items that I've developed for my race car. They are race-proven, used by multiple race teams, and worthwhile upgrades.
Hewland FTR fit reluctance ring
£10.00
Designed in-house, this is the 16-tooth Hewland FTR reluctance ring. Laser cut from 6mm steel, with an 81.35mm ID. The design allows a small amount of flex, which allows the rings to be friction fitted over the FTR output flange.
Each 7mm tall tooth provides a 36mm² surface to the sensor.
Weight: 54 grammes
Front wheel trigger disk
£10.00
Designed in-house, this is the 16-hole front wheel trigger disk, laser cut from 2mm steel.
70mm OD
6mm mounting hole
Weight: 40.5 grammes
3D printed GT101 bracket
£1.50
Based on my design, this is the 3D printed plastic GT101 sensor bracket that I use on my Hewland FTR gearbox. It places the sensor directly inline with the reluctance ring. For best results, use an aluminium M6x35mm cap head bolt.
Weight: 5 grammes
3D printed Intrax Bosch LP75 damper mounts
£80.00 for four mounts
The collar clamp fits the Intrax damper body, and the post fits over the 22mm nut on the other end of the damper, and is secured using a cable tie.
Installation
On my car, the FTR reluctance rings are matched with the Honeywell GT101 induction sensors, using the 3D printed GT101 sensor brackets that I sell (above). The printed bracket uses an aluminium socket head M6x35mm bolt and titanium locknuts, to allow the sensor gap to be easily adjusted. In testing, this setup has proved 100% reliable, with zero speed drop outs, set using a ~2mm tooth gap. Using 16 teeth gives the ECU a high resolution, and the GT101 sensors work well with the 36mm² surface area of the teeth.
Fusion 360
I use Autodesk Fusion 360 to draw the items that are found on this page. The drawings for the steel products, are saved in .STEP format and uploaded to Fractory.com for manufacturing. The turnaround is pretty quick, usually in around 1 week the items arrive back, and the quality is really very good. So far I've not used their new CNC service, since the quality and cost of the laser cut items is so good. But as my skills improve with Fusion, I shall try the CNC facility in the near future. I am thinking about designing a 3rd spring setup for the rear suspension, which will probably need a combination of laser and CNC cut parts.
Another manufacturing process is to use a CNC router, which allows materials like carbon fibre to be machined accurately, and in very short time frames. I copied the Mygale camber shim that is used on my car, and had a set of 1mm and 2mm shims machined. These are now in use, and saved a few hundred grammes.
