Anyone have the technical drawing of the 86 Turbo front rotor?

 

BUMP

 

Here you go:

 

THANK YOU! I've looked everywhere. This confirms what I thought about the 86 Turbo hubs. If anyone has pics of the 86T hub failures, please post 'em.

 

What are you thoughts about the hubs ?

All I know is they fail on the track some times because the hollow spindle on the left (for speedo cable) is weaker.

This is a normal 944 type 1:

 

The hollow spindle is on the non turbo early cars correct?
I'm talking about the 86T hubs that break at the cast alloy base. Since they share the same inner and outer bearings as the Early stronger hubs, I'm going to kill 2 birds and build billet hubs for the 86T that mount the 87-up turbo rotors on the front face of them. I needed that 45mm dim confirmed, thanks.

 

The late 87- spindle is thicker then the 86 ones. That makes them stronger, got nothing to do with the rotors/ hubs. The late rotors are just easier/ faster to replace.

 

I know the 87-up spindles are stronger than the pre 85.5 and 86Tspindles. It's the cast alloy hubs that crack and break at the inner bearing seats. I'm going to build billet alloy 6061-T6 hubs that are 7X stronger for the Early 944's and 86 Turbo's that also mount the rotors to the front but retain the early bearings so the spindles/suspensions don't have to be swapped. Stay tuned

I've started on a set of billet hubs for the 928 and will confirm the final dims for the 86T hub that is being sent to me.
I had this same thing happen on an '88 car I owned and the hubs are stronger than the 86T....

 

I almost have all the info in hand, particularly the 86T wheel face to rear rotor face dimension. I will machine the 87-up hub O.D. (155mm) and rotor offset onto the 86T hub dimensions with the Early inner and outer bearings. So instead of being the weakest cast hub of the bunch, it will be the strongest.....

 

The 86T spindle is weak ans is usually what brakes why not just put 87+ spindles on and machine them for the correct camber adjustment? I have converted several cars fro 86 to 87+ spindles with no problem, used 87+ spindles and hubs can be had for $150-$200.

 

Pre 85.5 spindles on the driver's side are hollow (for speedo cable) and break, but not as often as the Hubs (they all seem to break at the race seat and are worse on the Later ABS hubs even) The camber angle is machined differently into the spindles. A set of billet hubs will fix both problems and get the rotor stress off the back of the hub where it is affixed with 5ea 8mm bolts to 5ea 14mm bolts... Add bigger brakes to the hubs and they will really head south.

 

I would like to see the math that proves that your hubs will be "7X" as strong as the factory hubs. In my observations, it is the spindle that breaks, not the hub.

 

I still have not seen a pic of a non-hollow spindle that broke. I'm building these for the 86T non-hollow spindles. When I'm done they will be about that strong, there is no ABS ring to machine at the base so they will be even beefier there and through-out the bearing channels. I'm going to take it a step further and machine the set screw PCD's for all the 944/968/and the 928 rotors and even the 318x28 BoxsterS rotors.

 

FWIW, I have seen a ton of 86T spindles break, quite a few 86 hubs disintegrate, as well as maybe 2-3 M030 hubs shatter. Also have seen a lot of hubs where the inner bearing race area was so worn the race would just spin in the hub.

 

Racers Edge has been selling 87+newer billet hubs for several years.