question for Guy / Henry
question for Guy / Henry
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dds1

Original Poster:

1,407 posts

284 months

Wednesday 10th November 2004
quotequote all
Chaps,

Did either of you switch from ceramic to steel discs?

I am looking at the Carnewal kit for the GT2 which appears to fit my needs, just wanted to know if anyone had had any experience of it.

TIA

Dean

dazren

22,612 posts

287 months

Wednesday 10th November 2004
quotequote all
Just in case they take a while, I discussed this with Henry at Brunters a few weeks ago. Guy is currently still running on PCCB. Henry is running steels on the front and PCCB on the rear.

DAZ

dds1

Original Poster:

1,407 posts

284 months

Wednesday 10th November 2004
quotequote all
Cheers Daz,

It's getting ridiculous, just shelled out the best part of £1k for new pads after one trackday melted the old ones, and the discs are starting to show discolouration / degradation as well (hopefully cleaned up by new pads)

at £3k including fitting this kit seems like it might be a reasonable solution, just trying to find out if the kit is all it's cracked up (no pun) to be..

dazren

22,612 posts

287 months

Wednesday 10th November 2004
quotequote all
If the Carnewal kit is the one I'm thinking of and I owned a GT2 I would have already got the kit installed. Seems a logical alternative before moving onto an expensive big disc aftermarket system from the likes of Brembo etc...

From memory for anyone reading and curious. The Carnewal kit uses original porsche parts and you end up with the same size steel discs (GT3 mk 2 front discs) using the original calipers on the front axle, on the back axle they give you slightly smaller steel discs (the ones fitted to 966tt) with a new caliper painted yellow to match the original calipers still on the front.

DAZ

>> Edited by dazren on Wednesday 10th November 18:47

GuyR

2,534 posts

308 months

Wednesday 10th November 2004
quotequote all

To re-summarise and somewhat repeat what is already written............

Henry is running the GT3 steel discs up front with the PCCBs at the rear. The main brake wear is taken at the front and the GT3 steel discs are really cheap and fit straight in. The reason for not replacing the rears is that the rear discs are hardly worn and you need to go smaller on disc and caliper as no-one makes 350mm steel rears (yet). He has done a lot of miles with this setup and says it's good (better than PCCB).

I am still running PCCBs front and rear. My first set of front PCCBs were replaced by Porsche at 9,000 miles. The subsequent set have lasted another 11,000 mile, but are showing signs of wear. They also feel crap on the road, with no initial bite and poor feel. I will almost certainly be switching the fronts to steel soon.

There are many aftermarket brake kits available (including a 380mm, four pad ultra-lightweight titanium brembo kit thats about £15,000!), but the fact is that the stock brakes are good enough, with the right pads.

Your discs will not get better, they will only continue to degrade further.

Guy

PS Check you have yellow sport pads fitted, not the black comfort pads as supplied on the Turbo, that are specifically not recomended for Track-use (my dealer twice ordered the wrong ones)........

>> Edited by GuyR on Wednesday 10th November 19:09

Henry-F

4,791 posts

271 months

Wednesday 10th November 2004
quotequote all
The wrong Henry I know but I do get through a few GT3 brakes. One of the strengths of a GT3 is it`s ability in the braking zone, not much can compete. Given my strong reliance on those little bits of metal, particularly somewhere like Castle Combe where the proximity of the tyre wall at Tower does mean any failure will result in a very short wheelbase GT3 cup car, I keep a close eye on how they perform.

There seems to be 2 problems with the ceramic product. It`s cost and it`s "experimental" status. It`s great if you want to run flat out for 6, 12 or 24 hours then chuck them away but over a long period how do they fare ? That question has already been answered elsewhere. The prohibative cost means owners are unlikely to toss them away an replace them too often which may mean they don`t function as the motherland intended.

There is nothing wrong with Porsche`s steel product. I have never suffered any warping or brake fade in the GT3. In fairness one of the reasons for that is because they aren`t that expensive to replace (well relatively anyway !) and so we don`t run them to within an inch of their life.

My advice, unless you want a talking point for the golf club bar, is to take the ceramics off, (very carefully), wrap them up in cotton wool and fit steel gear which you can then use and enjoy. 6 pot callipers and GT3 discs would seem the perfect choice. Don`t quote me but if you order 2003 motorsport callipers they should even come in yellow ! (the 2004 ones are red).

GT3 motorsport discs will set you back around £160 a piece, pads around £220 - £280 a set. Callipers are around £300 each.

You could replace them every other trackday (which you shouldn`t have to ) and still be quids in. Not only that but if you`re at all unsure of how a set are performing just chuck them in the bin and slap a new set on.

Obviously the one disadvantage is greater unsprung weight but I wonder how many of you will spot the difference, I doubt if you are to within 5 seconds of a good man at the wheel of a GT2 round somewhere like Donnington, (and I mean no disrespect in saying that -I include myself as well !).

Keep smiling

Henry

GuyR

2,534 posts

308 months

Wednesday 10th November 2004
quotequote all
Well said Henry (the other one),

You don't even need to buy new front calipers though.

The GT3 Mk2 calipers for the 350mm steel discs are the same as the GT2 calipers except for the colour. The GT3 Mk2 350mm steel front discs fit straight into a GT2 caliper, even my OPC recomended it.

Only the rear is different, where the choice is either leave ceramics on or fit smaller Turbo calipers and 330mm discs (as per the Carnewal kit).

As Henry said it's a no-brainer really - Steel Discs at Under £200 each vs Ceramics at £2,500-£7,000 each.........

Guy

granville

18,764 posts

287 months

Wednesday 10th November 2004
quotequote all
Fascinating thread, chaps.

However, what're the 'squeak quotients' like with these various options?

Also, for ultimate retardation, did anyone experience/recall Adam's (six pot?) set up in the R-Turbo? I seem to remember them being astounding.

dds1

Original Poster:

1,407 posts

284 months

Thursday 11th November 2004
quotequote all
I discussed the situation at length with the dealer principal at the OPC last night, they met some of the cost of the pad replacement. What I am annoyed about isn't the wear rate, the pads still had lots of material left on them. It was the fact that after 1 trackday of maybe 60 track miles including making sure I did a warm up lap, 3/4 laps then a cooldown lap and plenty of time cooling in the pits, the pads had effectively fried themselves (they were yellow pads)

I am hoping the discs are fine (porsche technical think they should be, which isn't exactly filling me with confidence).

I intend to run the car through the winter with the new pads on, and next trackday season, get the carnewal kit (as said new discs x4, new rear callipers, pads etc.) and if the ceramics are still fine, put them in a box until resale time.

thanks for the advice chaps.

Henry-F

4,791 posts

271 months

Thursday 11th November 2004
quotequote all
The later GT3 callipers, and by implication your GT2 units are 6 pot as standard (the earlier GT3 units were 4 pot).

Henry