PCCB on a 56 reg GT3

[ChrisW.]

According to Evo this month, ST is a technical partner to the new Aston Martin Valkyrie --- and BAC Mono use the same CFRC (Carbon Fibre Reinforced Ceramic) discs --- also from ST ?

But I like the sound of the Brembo Al-Li caliper ... ??

To be honest, the other question is, what might be the lightest "affordable" wheels for a GT4 ??

[HokumPokum]

carbon carbon discs?

are they road legal?

[Slippydiff]

ChrisW. said:

According to Evo this month, ST is a technical partner to the new Aston Martin Valkyrie --- and BAC Mono use the same CFRC (Carbon Fibre Reinforced Ceramic) discs --- also from ST ?

But I like the sound of the Brembo Al-Li caliper ... ??

To be honest, the other question is, what might be the lightest "affordable" wheels for a GT4 ??

Look at the AP Radi-Cal or the new Pro 5000 series Chris.....

Light AND affordable rarely make good bed partners when it comes to wheels ....

Would you use 18" or 19" wheels ?

Edited by Slippydiff on Sunday 9th July 17:04

[Slippydiff]

HokumPokum said:

carbon carbon discs?

are they road legal?

They're not carbon/carbon in the manner of F1 discs whereby the disc is sacrificial. The ST discs are carbon/carbon with silicon carbide infiltration. From their website :

"The Carbon Ceramic brakes fitted as standard on many high performance vehicles are constructed in one of two ways – either a core of ceramic material reinforced with chopped carbon fibre with an additional ceramic layer on the friction surface or simply the core of ceramic material with chopped carbon fibre and no outer friction layer. Surface Transforms use a different process, utilising continuous carbon fibre to produce a carbon-carbon which is then infilitrated with carbon silicide before being machined to suit the application"

[Porsche911R]

Slippydiff said:

ChrisW. said:

According to Evo this month, ST is a technical partner to the new Aston Martin Valkyrie --- and BAC Mono use the same CFRC (Carbon Fibre Reinforced Ceramic) discs --- also from ST ?

But I like the sound of the Brembo Al-Li caliper ... ??

To be honest, the other question is, what might be the lightest "affordable" wheels for a GT4 ??

Look at the AP Radi-Cal or the new Pro 5000 series Chris.....

Light AND affordable rarely make good bed partners when it comes to wheels ....

Would you use 18" or 19" wheels ?

Edited by Slippydiff on Sunday 9th July 17:04

wont get 18" over 420mm disks and those calipers,a lot of 19" rub or have offset issues.

BBS make the nicest and one of the lightest wheels and Manthy tested, other wise OZ are a benchmark for lighter cheaper wheels.
Forgeline seem to be one of the rare 19" fitments for GT4

Edited by Porsche911R on Monday 10th July 10:19

[Slippydiff]

Porsche911R said:

wont get 18" over 420mm disks and those calipers,a lot of 19" rub or have offset issues.

BBS make the nicest and one of the lightest wheels and Manthy tested, other wise OZ are a benchmark for lighter cheaper wheels.
Forgeline seem to be one of the rare 19" fitments for GT4

Those F1 R's are what ? £7k plus a set ? Not exactly cheap ! ! But they are stunning.

[gtsralph]

Try DeMan Motorsport for GT4 upgrades including 18" wheels

[HokumPokum]

I looked at the ad on evo which means the pairing of the new brembo calipers with carbon carbon discs. wonder if these are available for road use

[Slippydiff]

HokumPokum said:

I looked at the ad on evo which means the pairing of the new brembo calipers with carbon carbon discs. wonder if these are available for road use

You have me at a disadvantage sir, I no longer subscribe to said comic journalistic tour de force.

[ChrisW.]

The standard wheel size is I believe 20" and even these occasionally trap stones between the rims and the outer edge of the PCCB calliper.

But if minimising unsprung mass for better feel and handling, it would be interesting to look at how much extra could be saved in the wheels ...

Thanks for the suggestions !

[Pookster]

I've plumped for a set of Alcon steel replacements for my PCCB. Nothing wrong with my PCCB, just have track days planned so no point risking them. Also simply can't afford the outlay for Surface Transform.

Put them on the scales and the complete set is 14.2kg heavier than the PCCB, which for steel vs ceramic is actually pretty light, (3.5kg per disc) and lighter than Porsche standard steels. Rear disc is 10mm bigger, calliper is spaced out by 5mm.

Marrying them with PFC 08 pads which I've not run before but decided to give them a go. First outing at Silverstone in two weeks.

From driving on the road the effect on ride is minimal, touch more wooden on broken surfaces but all minor, I have new dampers though which will help. Pedal feel once bedded better than it was, now a case of trying on track.

[ChrisW.]

Interestingly, the BBS 20" wheels in GT4 size save 11Kg's for a mere £6000 ish plus vat.

On the suspension mods and ST's over the last two trackdays and 1000 miles, I've saved myself half a set of tyres and 90% of a set of pads --- so £1000 towards the cost so far ---

My problem with the wheels is whilst they look lovely, they should not save their cost anywhere other than in unsprung mass ...