8 December 2020
More research and thought after a post in the Replicar Facebook group prompted me to do some investigation into the braking system. As I am using an aftermarket ECU the ABS control system will be deleted. My original thought was to reuse my master cylinder and simply connect that direct to the brakes. This would mean the master cylinder and servo would still be matched to the calipers so should work effectively. However the ABS master cylinder doesn't include a proportioning valve (this is managed inside the ABS control) so if I followed my plan the rear brakes would lock up before the fronts under heavy braking. I had thought I could simply put in a brake proportioning valve, however the IVA rules don't allow any sort of adjustable proportioning valve and they seem to be the only ones available. Since the mandatory introduction of ABS on production cars not many cars have them fitted anymore so obtaining a second hand one is difficult (at least at a viable price!). So I found a secondhand non ABS servo and master cylinder on ebay with the proportioning valve still attached for less than I could buy a proportioning valve on its own. I just hope its the right bore....alternatively I could revert to my original master cylinder and use the non-ABS proportioning valve.
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