The Triumph Dolomite Club - Discussion Forum

xvivalve wrote: ↑Sun Sep 10, 2023 6:05 pm The studs sit just inside a shoulder of the hub casting and extending outwards even by only 2.375 mm may encroach onto the chamfered area…

Carledo wrote: ↑Sun Sep 10, 2023 9:25 pm

xvivalve wrote: ↑Sun Sep 10, 2023 6:05 pm The studs sit just inside a shoulder of the hub casting and extending outwards even by only 2.375 mm may encroach onto the chamfered area…

I'm aware the tolerance is tiny on an original steel hub, even an original 3/8" stud at 95.25mm looks, to my eyes, perilously close to the edge. However, since i've loaded my 7/16" studded standard hubs quite considerably over many years without a sniff of trouble, i'm willing to believe appearances are deceptive!

But my comment, or suggestion was more aimed at the Sprintspeed alloy hubs, which, being alloy and therefore more malleable under stress loads, might be made with a bit extra reserve metal that could be worked with!

Steve

ian.stewart wrote: ↑Sat Sep 09, 2023 6:44 am

sprint95m wrote: ↑Fri Sep 08, 2023 11:23 pm

ian.stewart wrote: ↑Fri Sep 08, 2023 10:53 pm I am hoping to get somewhere in the 300mm disc size, I have a pair of aftermarket discs for a cosworth 295mm I think, and a pair of ambassador 4 pots too, not shedding weight but better than some alloy bembros I have had,

Not sure about this...
Ambassador calipers are a four piston version of a T2000 caliper, offering no more braking force.

If you are not bothered by their weight,
Jaguar XJ12 have bigger four piston calipers intended for bigger discs.....



Ian

First thing I will say is the clamping force is variable by altering the master cylinder bore size, fitting a servo, how hard you push the pedal or altering the pedal ratio to do so, they will all have an impact on clamping pressure, in reality its a balance between locking the wheels and knowing when they are about to lock.
Brakes, Generally, the area of pad is one of the benefits of 4 pots, by fitting big pads this gives more clamping area, and better heat dissipation. a bigger disc gives you more leverage against rotational forces and better heat dissipation, IMHO I will fit the biggest disc feasable just for that reason which in turn gives better feel too. for that reason. I never fit a servo either, they reduce pedal pressure but also reduce feel. and as they dont change the swept area of pad, or disc size, they dont actually improve your brakes ability to stop, just pedal pressure, and often forgotten in the equation, the final element of a braking system is tires, have small, skinny, hard, under or over inflated, that dont grip the road, the worlds best braking system aint worth a toss if the car is not gripping the tarmac. fit the best tires you can get.........
Princess callipers, they were the well known budget calliper that gave you bigger brakes, over the years I have had various brake setups, including princess callipers, which were superb, I, looking for a lighter setup changed the callipers to Porsche Bembros, almost the same swept area of pad and same piston displacement , the brakes went from stop on a sixpence ooooh im not liking this..........we eventually found out the Bembros flexed massively under load, where the cast iron princess ones did not,
Princess callipers,why I like them, they dont flex, there is a comprehensive range of pad material available, the pads are fairly big, piston volume is the same as a m16, so calculations for master cylinders is relatively easy, and the mounting the same as the M16
Braided brake lines normally have a impact too, as thy dont expand anywhere near as much as rubber ones,