400 braking improvements

[Geoff Dowdle]

Superfine ,
I have disc brakes fitted to my two 400's .

400 chassis 650 has a 405 front cross member with 406 discs and 406 anti roll bar .The 406 bar is shorter overall and has a kinked vertical link to give clearance with the caliper on full lock.
Wider 401 - 405 and 175 x 16 tyres fit without a problem .
On the rear I fitted 7/8in diameter wheel cylinders with the STD drums . It was then not necessary to fit a brake bias valve .
The master cylinder was modified by removing or making the valve at the front of the cylinder inoperative.
A servo/booster is necessary.
The inner wings/guards have to be trimmed for clearance with the telescopic front shock absorbers.
New flexible hoses are needed
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400 chassis 452 has a 403 front cross member with telescopic shockers ,
405 stubs , steering arms & tie tubes , 406 hubs & discs and anti roll bar, Cooper craft calipers .(for many years it was fitted with 405 12 inch Alfin drums and STD drums rear,which were a big improvement over the STD 11inch drums ).
The rear is converted to disc using 406 rear calipers , modified BMW rear disc 11inch and custom made caliper bracket .
A servo/booster is fitted.
The master cylinder valve needs to be inoperative.
The car now has outstanding braking , as good or better than most modern cars
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Another option is using the standard 400 front cross member stubs & hubs with modified rear 11inch BMW disc , custom made caliper carrier, Cooper Craft caliper , servo , brake bias valve .
This will be a major improvement to the cars braking and probably the cheapest and easiest option.

Pls advise the chassis details of your 400 ??

Geoff Dowdle
Joint 400 Registrar