m73m95

Couldn't you also cut the strut brackets off of the late struts, and weld them on early struts? (Or just make a new set of brackets?)

MAGK944

I suppose you could, but to mod the early struts is much easier. You just need to fabricate a 2mm spacer as the strut to flange gap is 20mm on the earlys and 18mm on the lates and elongate one of the holes by 4mm on the strut as the strut bolt distance is 58mm on the earlys and 62mm on the lates.

Oddjob

Mike,

Did you end up using late offset N/A or Turbo Spindles on your conversion? Remounted your existing 86T calipers?

Caliper bolt spacing is not the same for the N/A & S spindle (single piston Girling caliper) vs the Turbo, S2, 968 Spindle (4-pot brembo caliper).

xschop

That would be more complicated than cutting the Late strut and welding on an Early screw cap even.
That would also only allow for putting on the late control arms and defeat the purpose of being able to put on Early control arms without having to use camber plates.

You can't safely do the mod to an Early strut without machining a custom insert that lengthens the bolt spreadwith to 63mm(late) from the 58mm (Early) and machining 1mm extra thickness to each side of the adapter to Properly get the Late spindle in the Early strut.

xschop

LATE NA spindles caliper bolt holes are 76mm so are the S, S2,968, 87-upTurbo

The "red-headed step child" is the 86T spindle caliper bolt spreadwidth which is 94mm
The M030 caliper spreadwidth is 130mm, but radially mounted.
I have mic'd all of them personally before drilling and tapping them for Bump-steer kits.

m73m95

Someone remind my whats different about the 86 turbo setup. They are bigger spindles, right? They're early offset.. Will they bolt on to an early strut?

Meaning, could you just bolt in 86 turbo spindles and be done?

Oddjob

I dont know what front brembo calipers would measure the same as N/A calipers, because the 86T and later Turbo small 4-pot brembos have the same bolt spacing pattern. The only difference between the 86 and 87+ front calipers is that the 86 calipers had 38/36mm pistons, the later calipers had 40/36mm pistons. 86T caliper part number is NLA and supercedes to the 87+ part number, so they have to have the same bolt spacing.

You cannot bolt a Turbo Caliper to a late N/A spindle. I have tried. Bolt spacing is too wide on the brembo caliper for the N/A and S spindles. Hubs are the same, spindles are not. N/A and S spindles have the same part number; Turbo/S2 spindles are a different number.

The caliper bolt spacing for the girlings and the brembos is the same for rear trailing arms.

MAGK944

The 86 turbo spindles are smaller. Some good reasons for moving to 87+ spindles is that they are thicker, have bigger bearings running in the hubs, you can get billet hubs for them, you don't have to remove the hubs to get at the brake discs.

m73m95

So the 86 turbo spindle size is the same as the early NA?

xschop

Sorry, I made the assumption about 87-up Turbo bolt spreadwidths being 76mm as well. That's the only one I haven't mic'd personally.
And the only difference I found between NA and S spindles was NOTHING and the S2 spindles probably have a different part # because they are the same as the late NA spindles but are drilled for the ABS sensor.
So to confirm are the 87-up Turbo caliper mounts also 94mm ? (same as 86 Turbo).

M73m95....The 86 T spindles are the same as NA spindles Bearing dimensions except for the 94mm caliper mount holes.

m73m95

Ahh ok ..... I'll forget about the 86 spindles then. Thanks

Oddjob

Yep, the late N/A and S use the same calipers and therefore the same spindles.

I never measured the bolt spacing, so I will take your word that its 94mm. I do know that the 86 951 calipers are interchangeable with any of the later 951/S2/968 calipers.

And the 87+ 951, S2 and 968 calipers, spindles and hubs are interchangeable - but as you mentioned, just be aware that most of the 87-88 951 spindles were not drilled for the ABS sensor and the hubs did not have the ABS ring (only ABS optioned cars). All of these spindles and hubs made in '89 and since are ABS compatible.

xschop

I sent out a set of adapters for the 86T to mate the LS430 calipers and Boxster S rotors to gt1scca over on 944hybrids and he will have to trim the wide caliper ears on them to make them work. The 86T spindle is the worst of them all because the hub is even weaker than the NA hubs because of the smaller webbing......

xschop

Unless I get ahold of a set of 87-up Turbo spindles to mic, I still have doubts about the 94mm spreadwidths on those. I have been told otherwise elsewhere and, I have mic'd S2 spindles and they are 76mm spreadwith which contradicts your quote....
"""I do know that the 86 951 calipers are interchangeable with any of the later 951/S2/968 calipers. """"

http://944hybrids.forumotion.com/gen...ndles-t119.htm

Oddjob

Well, like I said, I never measured any bolt spreads, so dont know what to tell you about 94 vs 76 measurements.

What I do know is that S2/Turbo/968 spindles and calipers are all the same part number. And those calipers are not interchangeable with N/As. Where have you heard this is not the case?

I owned an S, and 951 calipers do not bolt to those spindles. I retro-fitted ABS onto my 87T, and used 968 spindles and hubs (as I needed the ABS mount and pickup ring) and bolted the 87T calipers to them.