Pedal Box


Ive decided to make a new pedal box that carries the standard GM throttle pedal in normal location ie.  alongside the brake. The picture above shows the Standard GM fly by wire throttle (to the right) with its mounting bracket (middle) removed. The new throttle pedal frame (to the left) will accommodate the ls3 or any standard GM throttle pedal.

Getting everything dialled in geometrically was the main challenge here. Andy was kind enough to loan me one of the castings he presently uses as a starting point. Ive made quite a few changes including moving the pedal pivot point further towards the driver to minimise the thickness of the spacers needed on the rear of the bulkhead.C:UsersmkbulDesktopMarks COBRApedal boxPedal Box profiles

I also plan to cut in a footwell extension box on the accelerator side of the inner wing – similar to the engine side footwell extension molding provided by GD, but for the opposite side. I cut an area out with a hole saw just to the right of where the throttle pedal will be, then removed the foam inner wing filling and realised there is an extra 40mm of width to be gained here! more if I do the extension box in Aluminium and leave it without carpet. Ill get this new footwell extension fabricated over the next week or so and get some pictures taken. That will give me a generous 360mm across the footwell in the pedal area, which is pretty good and


First prototype, I’ve incorporated some adjustment at the pedals for angle height and offset, and there is adjustment on the GM pedal. Think I’ll make some stainless steel pedals next week, more pics to follow. I want to get the pedal box installed soon so I can get the body back on and make progress with the power steering.

After a couple of modifications… Final Model


A few changes but Im finally happy with the whole box. I have made the actual pedal faces removable so I can modify this part easily once installed, which will allow a bit of fine tuning of the pedal geometry without the need to remove the majority of the pedal box from the car.Before I fit the pedal box I have to decide what to do with the cut out in the right side of the footwell.

This sequence of photos shows the cut out in right hand of footwell and the 40mm extra width that can be achieved by this butchery! The final photo shows the cut out glassed back in – I used some West System Epoxy resin and glass sheet to overlap the edges then coated with a black pigment resin gelcoat (or flowcoat). This way the structural integrity of this side panel is probably improved rather than weakened. I did consider making a fabricated panel to fit into the cutout but in the end i think the glass-up is the better solution. once it dries tomorrow ill fit the pedals for the final time.




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