That’s a point, but given that there are already flexibles in the system, adding more doesn’t make it any less reliable. They’re a well proven product anyway.
Though I would agree that the rigid pipes work well enough, at least in my experience, I haven’t had any issues with callipers not moving etc.
I have had no issues with the rear solid pipes into the rear calipers on all three of my Sevens going back to 1994. But the idea to change did attract me from an engineering point of view as well as esthetically.
You could say that the number of times that the solid pipes would cause a problem are minimal. Changing pads one - but how often does that happen when the average Seven mileage per year is around 3000 - 4000? Unless of course you are a track junky or racer. The other is caliper overhaul. With a bit of luck both actions could be factored in to the fluid change unless things occur out of phase.
The jury is still out on whether I will go for modification this winter.
Flexible hoses are great where the there is a high degree of movement (front wheels) or an awkward pipe route. The only time the rear calipers get pulled about a lot is when the pads are changed so are definitely a good idea for racers but I'm not so sure about anyone else.
But the idea to change did attract me from an engineering point of view
IMO, that is the key reason for doing it. Like 7WotW and others, I'm amazed that DVSA haven't already mandated that CC use flex hoses.
I ordered the flexi kit from CC when I was building my car last year, but after much faffing about, I wasn't happy the braided hoses were long enough to be routed without the chance of fouling and mine is a non-Watts linkage car. I ditched the idea and reverted to plan A, using the solid pipes supplied with the kit. Being a noob at the time, I was unaware there were other options to go braided.
There are two issues I had with the rigid pipes that the flexibles solved:
- Uneven inner to outer pad wear due to the pipe acting like a weak return spring
- Need to bend the pipe when bleeding the caliper correctly and the ensuing risk of fracture, bearing in mind I change my brake fluid annually and bleed at least once a year, sometimes several times a year, depending on the amount of track use.
+1 I find the only way to ensure bleeding is successful is having a flexible brake line so the caliper free to be moved.
Changed all my lines over to flexible braided, housed inside a clear sleeve.
Mmmm - not sure about fitting them everywhere. They have an in service maximum life where copper pipes are almost fit & forget. Looks nice though.
Changing from an almost zero maintenance item to a relatively high maintenance item as a way of reducing maintenance only makes sense if that item is getting pulled about a lot or it is noticeably affecting performance.