Rotor Over Brake Setup - What diameter to machine MS65 hubs to?

**WDE_BDY** · 03-07-2009, 10:50 AM

After some serious digging I have found the following which relates to the Skyline discs, very useful and plus rep to that man.

Originally Posted by CrUZida

Take one standard hub.
Machine the outside down to 143mm (stock is about 156mm)

I need to know though if this is the same inside diameter for the AUIII or BA Falcon rotors, does anyone have these measurements to confirm?
I have 3 sets of MS65 hubs (may be getting a 4th set) and would like to get them all machined at once but will be using different discs on them so will machine them all to the the smallest diameter. Other discs are Altezza but have those here to measure and will post dimensions once I have them in case they may be of use to others.

Callum

**YLD-16L** · 03-07-2009, 10:52 AM

Originally Posted by WDE_BDY

After some serious digging I have found the following which relates to the Skyline discs, very useful and plus rep to that man.

I need to know though if this is the same inside diameter for the AUIII or BA Falcon rotors, does anyone have these measurements to confirm?
I have 3 sets of MS65 hubs (may be getting a 4th set) and would like to get them all machined at once but will be using different discs on them so will machine them all to the the smallest diameter. Other discs are Altezza but have those here to measure and will post dimensions once I have them in case they may be of use to others.

Callum

The Brembo website has schematics of their rotors and will give you the dimension you are after

**WDE_BDY** · 03-07-2009, 11:16 AM

Nifty, found the Altezza (listed as Lexus) at 143.5mm so 143 is looking good. Can't seem to find the Australian Ford stuff in their catalogue though, will keep digging.
http://bremboaftermarket.com/En/Car_...ue_Search.aspx

Callum

**timbosaurus** · 03-07-2009, 07:57 PM

Just measured a (non genuine) BA 298mm rotor, and the maximum hub diameter that it will fit over is roughly 160mm.

**WDE_BDY** · 04-07-2009, 06:59 AM

Awesome, will get them all machined to 143mm and should be fine for all of the discs.

Callum

**rsdeo** · 13-07-2009, 01:15 PM

You should source a set of later front Z31 hubs ('88-'89). No machining required. Pcd. 5x114.3, center bore 66.1 and same bearings. Floating disc design.

**WDE_BDY** · 13-07-2009, 01:18 PM

I pay about $100NZ a set for the MS65 hubs and know where a few sets are, the Z31 is a lot rarer in NZ so simply not worth chasng.

Callum

**takai** · 13-07-2009, 01:22 PM

Originally Posted by rsdeo

You should source a set of later front Z31 hubs ('88-'89). No machining required. Pcd. 5x114.3, center bore 66.1 and same bearings. Floating disc design.

Z31s are much harder to find over here.

**CrUZida** · 13-07-2009, 04:40 PM

Just a note Callum, all disc manufacturers have slighty different dimensions.

When I measured the ~143mm, that was with (presumably) a factory Nissan disc.

I've currently got R33 GTR discs on my MS65 hubs, and from memory they only needed to be machined a few mm to fit the disc (down to say 150mm or so).

If I remember I'll check tonight.