Talk Morgan Forums Morgan Sports Cars Morgan Plus Four, Supersport & Plus Six (CX & CXV Generation Vehicles) My23 brakes

The MY23 brake system cannot be retrofitted, I believe that the ABS unit is by Bosch. I would hope that on the MY23 Plus Four it would be twin pots on the front rather than the single pot as on my MY21 Plus Four.

Didn't the factory try flipping the existing front calipers to a reverse (upside-down) orientation on the early Plus range if owners complained of poor brake feel / squealing ?

Apology for not having the ability to answer any of the logical questions and thanks for posting the pic Clemens. Interesting that the brake fluid reservoir is remote from the master cylinder, perhaps selected relative to maintaining the lowest possible bonnet line.

Another worthwhile question might be related to whether or not the ABS unit has a pump and if it`s ECU is built into the unit.

I did a bit of web wandering and was surprised to find a variety of faults related to Bosch ABS control units some where it affected speedometer read out, though found NO Bosch unit on the site below listed as being fitted to Morgan.

Bosch ABS Pumps & modules (ecutesting.com)

Seems the only mention of the brake rectification process carried out by the MMC has been related to a soft pedal and master cylinder replacement... No mention of MMC carrying out known work on any other part of the brake system..or have I picked that up wrong..?

Having noted the Litchfield comments...To further expand in the theme of modification for those interested in such pastimes and that Morgan might even have made use of something like this..? :-

ABS M5 Kit | Bosch Motorsport (bosch-motorsport.com)

A neighbour had two Nissan GTR`s from different eras, and told me he had planned to have the underside of the older one ice blasted and returned to look as new, the quote for all the work was reported as circa £10k with quite a few months to wait before they could take the car in.... Could all just be neighbourhood chat, though the cars were very real.

I think that was just to stop the squealing at low speeds Jon. After the mod they then only squealed in reverse

This is what I understood by the mod.

DOT (in brake fluid) comes from the US standard Department of Transportation test for boiling point

Can be confusing for the UK users as DOT (in roadbuilding specs) is Dept of Transport, and even MOT which was Ministry of Transport

Luddite as far as I can see the ABS has an ECU and certainly a pump on the other side of the block as I know ABS systems. Have unfortunately no better photo ... which I made during my visit four weeks ago in the factory

thanks Thierry for the picture

So there could be software issues with the ABS ecu or the main ecu, assuming they talk to each other, both or either of which could be causing excess pedal travel and/or inefficient braking. You will need someone cleverer than me to sort that lot out IF that is the case!