I bought a set of "standard" front discs from one of the usual suspects for the rebuild on my BT7 some time ago. The arrived in a pretty non-descript plain cardboard box in which I left them till the time came to require their presence.
Now having uncovered them and looked in more detail the overall finish of the central casting is a bit rough - fair enough it doesn't do much work. However running a straight edge over the surface shows it up as not entirely flat, further the finishing at the rear where the skimmed surface blends into the internal of the dome is a bit disappointing.
It is not exactly an insignificant item so I am looking to change.
If any-one has a recommendations on a good quality disc (fast road application) would be really helpful.
I couldn't gat BJ8 discs to go on my BT7 when I went to the Wilwood calipers without grinding metal away to clear the stub axle ( having bought nice Brembo ones which will go on the Jamaican in due course ) I used the ones that had already done many miles before the rebuild - sorry this doesn't help much but BJ8 discs aren't a straight fit
Interestingly I found a few sources which claimed that BJ8 discs would fit ....
I have used new heavy duty stub axles (BT7) from Denis Welch, coupled with the original caliper brackets. – so far all OK.
I then tried to fit the hubs together with the thicker BJ8 disc and I am finding that the disc is catching on the caliper bracket..
When I mark the spot on the back of the disc which is catching (apologies for the poor quality of this pic - but you get the gist)
It is only about the first 2mm on the rear face which is the problem. Now the discs I have, haver a diameter of 164mm before the ground face and on my rough calls I would need about 168. Looking at the spec sheet on the Brembo they are at 166.7mm, so better but not quite there. (But look a much better finished disc).
I could go back to a thinner disc (BT7) but as I have the callipers would like to try to get the 1/2" disc to work.