Quote:
Originally Posted by jeremy
Some of us have used box section across the top of bulkhead and secured pedal box from above to stop flexing....
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I'd say this is essential. The front of the firewall is made from thin guage steel so allows the pedal box to flex when you apply a significant force on the brake pedal. By fixing through the top of the bulk head you triangulate the fixing, which makes it so much stronger. Try to go as far back towards the driver as is possible for the maximum triangulation.
The section of the steel does not have to be particularly great. I found a 10mm flat bar has made a huge difference, provided it is taken to the sides of the fire wall where there is some stiffness to pic up from. I also had a space between the underside of the bulk head and the top of the pedal box, which has to be in-filled to achieve the stiffness required.