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Post by bbh on Sept 18, 2017 19:58:41 GMT
Folks,
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.
Andy
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Post by Admin on Sept 19, 2017 12:15:01 GMT
The Frankenhealey has BJ8 discs which I believe are the biggest you can fit with standard diameter wheels. If we go ModSports over the winter then bigger wheels, discs and calipers are on the list.
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Post by healeyneil on Sept 19, 2017 16:02:54 GMT
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
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Post by bbh on Sept 19, 2017 20:03:18 GMT
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. |
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Post by bbh on Sept 30, 2017 8:39:37 GMT
I am in danger of drifting this thread into something else - getting (thicker) BJ8 discs to work on an earlier car. So I will start a new thread on that subject. In the interim, I did a bit of searching of available discs. Brembo would have been my first choice but every-one I spoke to had them on at least 6 - 8 weeks special delivery from Italy. EBC have a choice of three different styles, all readily available and now pre-coated, so if it is going to take some time to get "on the road" they won't rust! Most of the usual supplier appear to buy from the same source with cast bell, as above. However Moss do a disc for the MGC / BJ8 (BTC371) which is fully machined and comes in a bit cheaper than the Healey ones ...... Moss disc on the left, original "Healey Suppliers" on the right  |
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