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I have tried the search function but, despite learning lots of other things, I have not been able to find an answer to my question.
My 968 sees some track time and the car has had troubles with rotors warping. I am now planning to convert the standard front brakes to m030 specs, mostly because I get these rotors for free through sponsorship. But what is involved, besides swapping rotors, calipers and lines?
Will the m030 rotors fit the standard hub?
Will the m030 caliper fit the standard spindle?
I know that the m030 hub is stronger than the standard piece but for now I would like to keep the cost to a minimum and go billet once they split.
If I have to replace the hub and spindle, where should I look for parts (will be needing calipers too)?
1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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Well, big reds or blacks would at least look the part and it is as you said a quite common mod. So common in fact that there should be a surplus of M030 calipers out there (or at least that was my plan anyway...).
1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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<!--quoteo(post=71821:date=May 12 2009, 05:34 PM:name=firefish)-->QUOTE (firefish @ May 12 2009, 05:34 PM)
<{POST_SNAPBACK}><!--quotec-->Well, big reds or blacks would at least look the part and it is as you said a quite common mod. So common in fact that there should be a surplus of M030 calipers out there (or at least that was my plan anyway...).<!--QuoteEnd--><!--QuoteEEnd-->
I have found a set of 928 GTS calipers and 911 turbo drilled rotors that came off a 951. These should fit my car right? But I'll need adapters for the calipers, new hoses and another valve (5/33?), am I correct.
What would a decent price for said calipers and rotors be? They are used, some 3000 miles, but look ok.
1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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M030 calipers and 911 turbo rotors are now bought. Big reds would have been sweet but too pricey. I don't really need more stopping power, my problem has been with getting rid of the heat. The bigger rotors should be able to assimilate more energy as well as getting rid of the heat faster (energy vs area vs time) so I hope I'm good. Unless the rotors crack (since they are drilled) but at least they look good.
1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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<!--quoteo(post=72812:date=May 30 2009, 01:35 AM:name=wmuldowney)-->QUOTE (wmuldowney @ May 30 2009, 01:35 AM)
<{POST_SNAPBACK}><!--quotec-->Car just had complete brake job, the feel fine now but as I add more power definitely want to add more braking.
My brother in law works for a major (non dealership) European Mechanic so I can get most parts that I need locally (some even discounted [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img] ), so that helps huge.<!--QuoteEnd--><!--QuoteEEnd-->
A little update.
First of all, to my disappointment, the rotors that I got with the S4 calipers are not as big as I had hoped (seller said 322x32) but they're "only" 304x32. Non cross drilled so perhaps from a 928 S4 or aftermarket ones. Maybe it isn't so bad afterall, it is quite easy to space the calipers outwards should I need bigger rotors - for know I'll enjoy the lower weight. The cooling ducts, or whatever the word is, are curved on the bigger rotors and it is my belief that that design allows for more air to be pulled through, thus improving cooling.
The calipers are the early style S4 caliper, not the one you'd find on a stock M030 equipped 968. The only differences are the dust seals from what I can tell. The newer type has the common style rubber boot where as my calipers have a ring type seal that probably does a worse job in keeping the crap out but in return is much more resistent to heat (better heat transfer to the caliper) and since this car is a summer only car (road and track) and I do not mind regular cleaning I am happy. I have ordered one new 44 mm piston since one was damaged and new trickstuff pads.
Keep in mind that these calipers have different seals and pistons than the later versions so if you get a set of these that needs to be rebuilded, make sure that you get the right parts. I don't know about Porsche in the US but here in Europe they have lowered the price quite much on parts for these calipers so make sure that your parts supplier has the right pricing.
As for the rotors they seem to center via the two screws that you screw in to the hub. The holes are located in the same position on both rotors. There are marks visible on the old rotors and on the hub (non M030) where you can see that the rotor hat has been in contact with, and thus also centered on, the hub. The fit was not what I would call snug so I cannot judge on the importance of this. The bigger rotors will not use this function as the hats are bigger and I am not sure if that is a problem or not. They should center perfectly via the two screws but since the standard hub is known to split maybe hat contact with the hub is a feature that supports the hub and that I, unless I tool up some spacer rings, will add extra stress on the hubs causing them to fail. Input on this would be nice.
I will keep you updated.
1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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Brake swap complete!
Finding the correct adapters for the calipers turned out to be quite a task but eventually I got it right. Having standard spindles has the advantage that you are able to move the calipers with spacers in all directions to accomodate different rotors which is good. On the other hand they are supposedly weaker than the M030 spindle.
I am now running 928 S4 brakes up front and standard brakes in the rear (all solid rotors) with a 928 (5/33) proportioning valve. Pads are Trickstuff (their endurance pads) with a helluva bite, downside being that they are a bit noisy and very very dusty. In addition to this I have also fitted stainless hoses from RS Barn (superior quality btw). Toyo R888's allows me to use the brakes too.
With this combo I find the braking significantly improved as compared to the standard brakes. It is a little looser in the rear with this setup as compared to the stock brakes (with same type of pads and R888). I think it's better this way.
The only downside is that the pedal travel is greater now, due to the greater piston area in the new calipers. I may still have some air trapped in there but I'm not sure, I'll rebleed it again to be sure. Didn't the M030 and the standard cars share the same master cylinder?
1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
