Ever since I finished my R400 late last year, it has annoyed me that I can't heel and toe because the throttle pedal is too far away from the brake pedal.
I've read a lot of the discussion on here, so I thought I'd write up my modifications and share the pictures in case they're of interest to others.
Searching through the old threads it seemed that there were about 3 approaches to modification
1. Bending the brake/throttle pedal
2. Fixing an aluminium pedal extension
3. Make up an extension from PVC waste pipe (I think this was Roger Heeley's idea initially?)
I started off with approach 1 since it's the simplest. I was pretty happy with the throttle pedal position as it was, so I first tried bending the brake pedal. Even in a decent vice I couldn't bend this easily, so I tried bending the throttle pedal (which much easier to bend). I'd already had to bend this a lot during the build to get the throttle cable to fit, so it was already a long way from it's initial shape. Bending it to the left however interfered with the whole geometry of the mechanism, and meant that the pedal could no longer rest on the pedal stop. With a bit of manipulation, it would just about work (and touch the stop) but it was so far out of square with the stop I was worried it would get trapped beneath it's whilst driving. So I bent the pedal back to it's original shape and thought again.
I considered option 2, having seen some nice pictures of JetSepter's modification. But it occured to me that this was a better option for people who wanted a longer pedal. What I needed (for the way I roll my foot over from the brake to the throttle during my version of heel and toe) was a throttle pedal closer to the brake in the "left/right" plane; I was quite happy with the length as is. I'd also seen TangerineDream's similar approach with a wooden extension, but a couple of people had mentioned the waste pipe approach.
Finally then, I settled on option 3 since I had some offcuts of waste pipe lying around, and one was a perfect, snug fit round the circular part of the pedal. It didn't sound like it ought to work, but since it was free to try I decided to give it a go anyway.
These pictures are pretty much self explanatory, but I did the following :
1. Cut the piece of pipe initially to 2.5" long
2. Drilled a 10mm hole for the pedal stem and made it into a slot with a hacksaw
3. Filed out the slot in small increments so that the pipe was a nice snug fit on the pedal
4. Mounted the pedal in the car for a test fitting. The initial feel was actually very good, but the extension was a touch too wide and it felt like I'd be catching the accelerator when I didn't want to, so I shortened the pipe to 2"
5. Having settled on a size of extension I wanted a mechanical fixing to ensure that it wouldn't move about or even worse come loose whilst driving
6. Marked and drilled a 4mm hole in the back of the pedal (so that it the soles of my shoes wouldn't catch on it) and riveted the extension in place
7. Fitted pedal back to car and adjusted cable and pedal stops
I've not driven the car yet, but just sitting in it, the whole setup feels very natural to me. The pedal operates nice and smoothly and I can roll my foot over when braking and just catch the edge of the pipe with the side of my foot when I want to. Perfect.
Hope this is of help to someone
Cheers
Mark