I know this should be worked out once the engine is fitted but what is a comfortable width for the drivers side footwell?
I dont want to have to take off my shoes to drive!
does this not depend on the size of your feet? why dont you do i mock up on the floor and see what your feet need?
You do not say what chassis you are referring to so I assume it is a book chassis.
tube "C" is 823 mm divide by 2 = 411.5
Minus tunnel 107 mm and 20 mm tube = 284.5
Plus the 25 mm to the ali side = 309.5
Moving your pedal box 75 mm back and it is a little more.
Measure the width of your shoes. Multiply by 2. Add the width of the brake pedal rubber plus a small gap so you don't hit it when pressing either of the other pedals. Make sure you can press brake and clutch pedal without interfering with each other or the throttle.
A book chassis footwell is a bit tight for my plates of meat but then they're size 14 and therefore quite wide.
I have to drive wearing Converse boots (no rim round the edge of the shoe) and even had to go as far as making sure there were no bolt heads
protruding into the footwell otherwise my foot will catch.
On the plus side, heal + toe action is quite easy- sometimes too easy 
I calculated mine to be 36cm!!! this means that
2x identical footwell = 72cm
adding the tunnel width for the gearbox 48cm
120cm in total!!!!!!!!!
only nearly 32cm wider!!!!!!!
than the one in the book
[Edited on 24/7/08 by l0rd]
At a rough guess just under 3 feet wide... 
[Edited on 28/7/08 by stevebubs]
quote:
Originally posted by smart51
Measure the width of your shoes. Multiply by 2. Add the width of the brake pedal rubber plus a small gap so you don't hit it when pressing either of the other pedals. Make sure you can press brake and clutch pedal without interfering with each other or the throttle.
If it looks like an issue, I've offset the engine and box 50mm off centerline to give a bit more room for wide feet, its not an issue as long as
they are parallel to the centerline of the chassis (i.e. you don't point the gearbox yoke at the diff) so the angles of universals of the
driveshaft remain equal and opposite. It also gives me a lot more knee room around the trans tunnel. Since I'm using dedion, the diff head is
also off center with different length axles, this gives me more bum room, the passenger side is a bit snugger, but it stops them flying around as
much since they don't have a steering wheel to hold on to