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968 Brake Question

B

Bass GT3

New member
Hi Guy's,

I'm currently rebuilding my race car, and shall be fitting 968 front hubs, as the ABS ring can be used by my ECU as a Traction Control trigger.
My question relates to the brake calipers i can fit to these hubs. I will be running 16" wheels, so i guess the stock rotors are fine, but which calipers fit? Are there calipers from other models, such as 944 S2 et that are a diret fit? Or am i limited to the stock 968 calipers ith the 16" wheels?

Many Thanks,

Steve
 
ISTR standard S2 and 968 front calipers are the same, a popular upgrade is to fit the M030 type calipers (944 S2/turbo and 968) but this requires an adapter to mount on stock S2/968 hubs. The main difference is a much larger brake pad surface area the disks are different but only marginally. ISTR this caliper was originally standard equipment on the 928 S4 and later prior to the big blacks fitted on the 928 GTS. I believe I am right in saying that for the big blacks one needs to use 17" wheels or bigger but the M030 calipers will clear a 16" rim OK.
 
Dave,

The car is a true hybrid!!! 1985 924(non S) chassis, 944 ali_ABS rear end, 968 front hubs and control arms(charlie type) She is being built into a 924 GTR tpe replica, so no real direct comparison to any model. All up she will tip the scales at about 1000kgs, will run 10" &12" slicks, and has a Tilton pedalbox, so no master cylinder issues and 370bhp on the little 2 litre
So what i am looking to find out is what are the biggest/best brakes i can fit under 16" rims on the 968 hubs, without going to M030 type as these seem very pricey and even more rare or 17" wheels.
Please forgive my ignorance, but "Big Blacks" or M030 means nothing to me. I just want to know the model i should source these parts from.

Many Thanks,

Steve
 
Steve,
A real hybrid there m8....
M030 basically is a "sport" option that Porsche did. It consisted of bigger brakes / 17" wheels + adjustable suspension.
Well the M030 brake package , consists of callipers sourced from a 968/944turbo "M030" car.
OR a 928S4 [standard], car.. The main difference being the 928S4 package has the plain front discs as uposed to the drilled ones[more expensive] on the 968...
So you can get the 928S4 calliper + discs , they should fit under a 16" wheel. BUT im not too sure about the larger calliper from a 928GTS or 993 twin turbo...[ commonly known as,Big black / reds].
Ive been running the 928S4 calliper/disc set up on my 968 for over 4 years now, with no fade ...[ Got to get GOOD pads though]. Although i should think if your car is only 1000kgs itl be pretty nimble...
The above reply from Niel is correct + you will need to source a pair of adapter brackets to fit the S4 callipers to the standard 968 spindles...[ I had a few sets of these made but my stock is all gone]...Just ask around on the 944 forum + you might get lucky....
I wish you well with your project. It sounds promising....
What are you going to use it for.??
 
Dave - i'm not convinced the s4 calipers will fit under 16" wheels. As i recall, they are roughly the same size body as the big reds/blacks, plus of course smaller pistons and smaller pad depth. IF they do fit , it will be VERY VERY close to the inside of the wheel. For the 1000kg weight, S2/968 calipers (without plate lift) should suffice, with of course some good fluid and appropriate 'race' pads; pagid, mintex etc, they will fit to the 968 spindles, and the discs will be cheap (as far as Porsche discs go).

Dave - do the man a favour, go out to your garage and try to fit a 16" wheel ;) to your car, we'll know for sure then.

JP
 
Hi Guy's,

Thanks for the informative responses. I'm leaning towards the stock calipers as they seem to be readily available, cheap and pretty effective. As the car is so light, this will really help. Secondly, the car is going to be used in the PCGB sprinting & Hillclimbing Championship, as well as a local championship. So the time on track will be pretty limited, thus reducing the chance of overheating i guess. If i do venture out on a track day, then i can always fit proper 3" brake cooling ducts as the front of the car is fitted with ducts suitable for this. All the brake lines will be goodridge types throughout, with top fluid used to boot. So based on this, i think the OE items will be fine. Any thoughts?
Now just need to source a set. Any ideas??

Steve
 
JP.
They must fit under the 16" wheels, as they had them fitted to the 944turbo, which only came with 16" wheels....
Steve. Sounds like the standard 968 / 944S2 callipers will be adequate..Especially if you using the car mainly for sprints, as the brake temps dont realy get that hot....Itl also keep the costs down...
Try any of the reputable breakers OR failing that E-bay..., But ide factor in the cost of getting them refurbed, ie plate lift fixed...[try a search about plate lift]....There should be lots mentioned..
 
Steve.. I've got something a little similar ( only 240bhp ) ... although its not running the 968 hubs or front control arms, this is something however that i'd like to rectify so I can get ABS on the car.

Would you be able to post some pics of the underside of your front end or even email them to me?

thanks

Lali
 
Had all 4 callipers replaced at EMC last Sep for the Oulton day, so I have a complete set of standard 968 ones surplus to requirements. The plates were all lifting with the fronts worse than the rears. I was going to refurb them when I got around to it but haven't found time yet. The front discs were also replaced (though only a low mileage on them) and I would probably throw them in if the price was right. Anyone interested?
 
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