LS1Porch

I could hardly give away my 87+ turbo spindles and hubs, the things are so plentiful. You'd probably spend almost as much on material for machining new hubs as you would on just converting to the late setup. Why bother?

xschop

1. Billet over cast
2. Over the hub rotor(s)
3. Early offset wheels remain
4. These will fit the Early Non-Turbo spindles as well for the BoxsterS rotor upgrade.
5. I have researched a larger outer bearing that matches the load rating of the LATE spindles

xschop

I just re-measured the 87 spindle I have and the locknut threading is M18 x 1.0
You have to ask yourself why is it that the same threading size on the 86T spindle snaps off and Porsche left this the same thread size but beefed up the bearings on the later spindles?

Pdoc are you saying that the 86T spindle broke on the 0.75" (19mm) bearing land or did it break at the base of the machined thread before the bearing land?

PorscheDoc

Just at the base of where it steps up. Basically on the same plane as the threads. In your picture (on an 86 spindle) it would be just to the inside of your red line marked "22mm"

xschop

To confirm, looking at the pic, the breaks happen to the right of the red 22mm line, correct? O.K. I thought you were talking about at the end of the threading before the 19mm bearing land. It makes more sense that the early spindle would break at the end of the land right at the point where it angles up to larger stub shaft Dia. because this is where the entire load/weight of the vehicle rides.

PorscheDoc

Exactly, right where it starts to angle upward.

xschop

Did some calc's and it's amazing that a 2.37mm dia. increase can make a difference on that stub axle land. I believe the 86T is why Porsche went to the large stub axle in '87. I wonder if they were getting more reports of stub axle breakage since all they did was slap on larger dia. rotors and 4-pots to the early small bearing axles.

Ques at P-doc. again. Doesn't the 86T spindle fit right onto the 87-up strut 63mm eye-eye bolt mounting? I thought I wrote that down somewhere.

xschop

Thanks to ALFAPU for confirming those dims on the 86T spindle. 18mm wide and 63mm C2C strut interface

User 52121

Hey xschop - what ever became of this project?

MAGK944

There is already a billet hub produced by Racers Edge that can fit an 86T and provide a better solution. Use the 87+ spindles with the RE billet hubs and you have the better spindles and bullet proof hubs.

xschop

Yes, the 86T spindles are the limiting factor because they snap at the outer bearing land. I have not abandoned the 87-up billet hub project and have something up my sleeve on those. They'll get drilled for 2 different rotor set screw patterns so all 911-944/951-928 and Boxster-S Rotors will bolt right up.

xschop

What do you guys do about the extra 4 degrees of camber when you stick on the late spindle to the 86T ?

MAGK944

Is it that much? I didn't really notice but I have adjustable camber plates fitted and was easily able to get a good street alignmnet. I read here that someone who did this managed to align without adj camber plates, will try and search.

xschop

Early spindles are 11 degrees and Late spindles are 15 degrees from vertical. I bet your camber plates are maxed out towards the engine compartment.

MAGK944

No, still have lots more to go. I think what you are forgetting is that camber plates have to move a lot for a small adjustment due to them being where they are. The camber adjustment at the spindle moves camber a lot with small adjustment. If you measure the displacement difference between early and late at the spindle camber holes it is only about 3mm. The angle will be the same but the distance you need to make a big adjustment on camber is much smaller.

Anyway, I think you can get a roadworthy alignment with the stock adjustment on the spindles but I will have to confirm. I have both types sitting in my garage so I will check and post pics tonight. For a track you would definitely need camber plates to get the required negative.