V8 Vantage S 2 piece brake disc replacement

[simon578]

Hi all

I have a 2013 V8 Vantage MY 12.25 that has the 'S' 6 pot calipers and 380mm discs. The car has just been in for its service (22k miles) and the technician recommends disc and pad replacement at the next brake service.

Question for the group:

Considering the 2 piece rotors are really expensive, has anyone consider alternatives? I'm NOT considering downgrading to the 1 piece cast iron discs, but would appreciate if anyone knows if you can source the rotors separately (retain bell), or possibly do a brake disc skim?

Considering these discs have only done 22k miles it seems a bit early for them needing to be replaced?

Thanks in advance!

[bogie]

Ive not seen any cheaper options other than going for single piece rotors.

22k seems a bit low. Id check them myself to be sure. Over the last 13 years and 140k miles ive been getting 30-35k miles out of discs.

Most main dealers seem a bit keen to recommend new discs/pads based on not seeing you for another year. Ive had new pads recommended at £500 an axle fitted, declined and gone DIY. Got them out a few weeks later for inspection and they were barely 1/2 worn.

Perhaps its a lack of hard use and you have some corrosion and they recommend them replacing, when you could get away with a skim ? the only way to know is to inspect yourself. If you can do the labour yourself it could work out cheaper. If you start paying another garage labour to remove/skim/replace it might work out better just to fit new discs.

[V8V Pete]

simon578 said:

Hi all

I have a 2013 V8 Vantage MY 12.25 that has the 'S' 6 pot calipers and 380mm discs. The car has just been in for its service (22k miles) and the technician recommends disc and pad replacement at the next brake service.

Question for the group:

Considering the 2 piece rotors are really expensive, has anyone consider alternatives? I'm NOT considering downgrading to the 1 piece cast iron discs, but would appreciate if anyone knows if you can source the rotors separately (retain bell), or possibly do a brake disc skim?

Considering these discs have only done 22k miles it seems a bit early for them needing to be replaced?

I would be very surprised if the discs needed replacing at 22K miles.

My V8S is a Dec 2013 car and had 12K miles on when I bought it in June 2015 so presumably had its original discs on which were the cheaper co-cast discs as the cost cutting had started by then.

18 months ago when the car/discs had done 34K miles I got new proper 2 piece AML/Brembo discs and kept the old co-cast ones for track use with aggressive Pagid RSL1 pads. They have so far done 4 track days since then and some road miles in between and they still have a significant amount of life left in them.

Discs should be measured with a vernier gauge and this thickness compared to the service limit of the discs (not sure but this might be 32mm). There's no way I would let them change them on the whim of the technician with no hard facts offered. Sounds like you're being serviced at a main dealer who wants to take easy money off you so my advice would be to go to a decent indy and get proper service and advice.

I am not aware of any alternative non-OEM discs available but if they do 40K miles then it's not really an issue. If dealers change them unnecessarily then it is.

Edited by V8V Pete on Saturday 12th December 10:13

[Sydney V8V]

Try racingbrake.com and essexparts.com ; both in USA , Quality brakes and with postage will be cheaper than OEM parts.

[Emilio Largo]

No idea if this helps/makes sense:

[bogie]

Are the Brembo any cheaper than OE discs ?

[JonnyCJ]

https://www.onlinecarparts.co.uk/oenumber/bg331125...

£765 each

[bignoise]

The later V8V, about 2015, moved from the 2 piece floating disc, which are about 900 each, to Cocast discs which are about 1/2 the price and from what I was told a direct replacement

[simon578]

bignoise said:

The later V8V, about 2015, moved from the 2 piece floating disc, which are about 900 each, to Cocast discs which are about 1/2 the price and from what I was told a direct replacement

That's really helpful! Do you have any information on part numbers? When I search on eurocarparts I get a result showing Brembo discs 355mm in diameter, compared to the standard 380mm ones. I wasn't sure if the search I was doing is producing a wrong. The Brembo part number appears to be 09.8780.21.

I wonder if there's a noticeable performance difference between the original and these replacements; has anyone had the chance to compare side by side

[bignoise]

Afraid not

There was a new pair on a while ago but I cannot find them

Try giving HWM parts or scuderia a call?

[bignoise]

Afraid not

There was a new pair on a while ago but I cannot find them

Try giving HWM parts or scuderia a call?

Ps dont forget to verify they fit, Pads etc are all the same

They are similar to the Rapide items but i believe the Rapide has a different stud pattern

[bignoise]

https://www.astonmartinbits.com/models/5-V8-Vantag...

I know you dont need all the calipers etc but this shows the discs

[Emilio Largo]

simon578 said:

I'm NOT considering downgrading to the 1 piece cast iron discs, ...

Aha, there is a misunderstanding , I thought you are ruling out the later "co-cast" discs, too. Bignoise is right, of course, these are considerably cheaper.

Perhaps this brembo part is helpful in any way?

[V8V Pete]

simon578 said:

bignoise said:

The later V8V, about 2015, moved from the 2 piece floating disc, which are about 900 each, to Cocast discs which are about 1/2 the price and from what I was told a direct replacement

That's really helpful!

I wonder if there's a noticeable performance difference between the original and these replacements; has anyone had the chance to compare side by side

As I said in my post above I have had both on my V8S.

I imagine the 2 part ones are a bit lighter than the co-cast ones but don't have the figures.

The breaking surface/area is the same between the two so they feel very similar on the road but Mike at BR reckons the proper 2 part ones will have better heat management so be less prone to fade. On track, I've only used my co-cast ones but can confirm that it is possible to cook them a bit as seen below. They've got into this state three times now (dry Rockingham, dry Blyton Park & dry Donington) and feel pretty ropy with this much pad material deposition on them (noisy & "rough") but have always recovered completely with a couple of hundred miles of road driving and lived to fight another day

[Wafu7]

Thread resurrection:

Has anyone opted for the non-OEM solution offered by DAE - the 2-Piece Girodisc/VAP Lightweight Brake Rotors? I have an MY2016 V8V, so it has the S’s 6 pot callipers and 380mm discs, albeit the one piece co-cast option. The cheapest I can find those for is £590 per disc, whereas the Girodisc/VAP option works out £720 per disc. The latter option seems like an absolute no-brainer - but am I missing something?

Has anyone here had DAE fit the imported US rotors? More importantly, has anyone subsequently had to replace the discs, retaining the Girodisc/VAP bells? In that case, what discs did you go with?

[tom-4hcey]

There’s a firm I believe they are called go racing rotors. I intend on using them for my 2013 vantage s at some point. From memory they were about 800 a pair for 2 piece. If you want OE brembo discs try auto doc when they have 41% off they are about 800 each. Hope that helps

[tom-4hcey]

Sorry they are called RB racing rotors and are £849 a pair delivered. Jamie is the guys name and he is really helpful.

[Wafu7]

Cheers, Tom — much obliged to you.

[bogie]

Ive had the RB racing rotors discs on my 2012 Vantage for about 2 years now. Really good, brembo discs and I have Porterfield pads, near zero dust. Total cost was about £1200 plus fitting (I did myself) which is huge saving when the dealer wants near £3k.

[tom-4hcey]

Just looked on the website and it says £800 delivered. 380mm x 34mm.