67King

You get a slight anti-dive improvement when they are mounted at the back (I assume this is trailing). It is just because of where the force is applied.

All of the Turbo S and 89+ Turbos had the M030 package as standard, did they not?

etiennekuh

why don't you install the 996 TT calipers, they are cheaper as the BB and BR and look nicer to

Etienne

Chris White

The caliper mounting is usually defined by the location of the steering – front steer get back caliper mounting (like ours) and 911s have rear steer so they have front caliper mounting.

Front / rear steer refers to where the steering rack is located – in front or behind the wheel center line.

docwyte

So remind me what the 88 Turbo S and 89 951 front calipers are again? Aren't they the same as the big blacks?

If not, big blacks and either GTS or 965 rotors are a direct bolt on for my car?

ninefiveone

88TS and 89 951 front caliipers are commonly referred to as S4 calipers since they are the same as mounted on 928S4's. They're the "inbetween" option that came with the M030 package and mount the same as BR or BB calipers.

docwyte

What sort of improvement is it going from the '89 factory stuff to BB and 965 rotors? How much larger are the pads, I assume they don't use the same pad fitment?

I have TONS of pads for the front calipers right now as it's the same fitment as Stoptech ST40's, which I've had on lots of previous cars...

67King

Any Hawk Blues in fair shape you'd be interested in selling for not a whole, whole lot? I've got calipers and rotors for the change, but am planning on holding out until I need to replace either my pads (one event on the fronts) or the rotors (more likely to go first). I already outbrake everyone I've faced in my run group (3 - intermediate solo), so the stock small blacks are still serving me well (and note that guys with ego's as big as their GT3's don't let "slow" 944's go by, even if they are faster).

docwyte

PM sent.

Chris White

The big reds take a pad that is the same length as the turbo s but about ½’ taller. There is a lot more rotor contact area on the rotors for the big reds (larger diameter). Not many 16” wheels will fit over the big reds….

docwyte

I run 17" wheels on track and 18" for the street, so that's not a concern.

Hmm, may have to do this once I run through all my current brake pads...

ehall

what the hell is < that about?

ehall

Thanks for the earlier info Chris. I'll eventually go to some combo of BB's.

ehall

Is the 5/33 valve also necessary?

Nurburger

Yes - otherwise the braking balance would be overly biased towards the front.

Also, my car is an 88...

The only real "mod" required to fit the BB was trimming the dust shield.

ehall

What is the biggest wheel and tire that you've been able to fit on the front, without rubbing? I'm about to pull the trigger on some bigger wheels/tires, and this will be really helpful, considering you're our resident wheel/tire fiend!
TIA