Well after my epic fail of a track session at castle combe im now on a mission to improve my stopping power.

this is what happened to my discs whoopsy....

 

 

 

these are the puppies.....

:D

 

 

Now....where the hell do i start? do i fit some discs that i like then make the messurements to fit the calipers?

 

I was thinking to fit them on my discs i have at the mo then once i have them fitted buy the same discs but without the drilled holes and just slotted. But i have no idea what discs they are, il give z1 a call soon, maybe they can help. The only prob i had with them discs was the cracking, other than that the brakes always felt responsive and never had any fad even on the track.

 

obviosuly im going to have to clear the wheel spokes.

 

Anyone know of a good enginering shop who can messure and make brackets to fit these? they are brembos at the end of the day.

Edited April 28, 200916 yr by j1mmytt

Jimmy,

 

The reason your discs cracked is NOT because they were drilled, it is because you were using stock calipers/pads on a larger disc. As stated (by yourself) previously, the inside surface area of the disc was wasted. When using the brakes agressively (ie, track day use) the fact that you are only using a small proportion of the disc and poor heat dissipation of the caliper means that there is a much higher propability of the disc overheating. This is especially the case when you come to a stop after a track session and stay on the brakes too long whilst standing still. This will cause local overheating which in turn may cause the disc to crack. I have seen this on one other occassion on a 300 running bigger discs with stock calipers. Drilling/grooving discs introduces "imperfections" and reduces the effective surface area of a disc but it is a compromise between gas dissipation and effective braking.

 

With regard to your new Porsche calipers & discs - the calipers will accept a range of disc sizes. For example, the KSport 8-pot calipers used with their 330mm discs also works with their 356mm discs. Therefore, your best bet is to contact a Porsche dealer/parts department and ask them what size discs that particular caliper accepts. When you get the brackets made up make sure they are made from either mild steel or preferrably aero grade aluminium. Also, make sure you use the highest rated high tensile bolts to secure the bracket to the hub and the caliper to the bracket. You really don't want to be scrimping money here ...

 

Good luck!

 

Dan

Hi danny

hmmmm The porsche discs are 318mm.

So 330 is enough? i think,

 

I did kinda gather the calipers were creating too much heat for the disc.

Anyway i test fitted the calipers just in place to check for any clearance issues. Looks ok to me.

 

 

The brackets will be a job and a half. Will have to have a 90 bend as the caliper mounting holes face to the rear of the car.

 

As someone mentioned earlier i think i should borrow a front hub and send the disc caliper and hub to an engineering shop to be made up.

 

Anyone have one they could lend me?

Dan,

 

Does this mean that you would not recommend larger discs with standard calipers? I thought you used to sell this upgrade (discs and relocation brackets)??

 

Jimmy,

 

The reason your discs cracked is NOT because they were drilled, it is because you were using stock calipers/pads on a larger disc. As stated (by yourself) previously, the inside surface area of the disc was wasted. When using the brakes agressively (ie, track day use) the fact that you are only using a small proportion of the disc and poor heat dissipation of the caliper means that there is a much higher propability of the disc overheating. This is especially the case when you come to a stop after a track session and stay on the brakes too long whilst standing still. This will cause local overheating which in turn may cause the disc to crack. I have seen this on one other occassion on a 300 running bigger discs with stock calipers. Drilling/grooving discs introduces "imperfections" and reduces the effective surface area of a disc but it is a compromise between gas dissipation and effective braking.

 

With regard to your new Porsche calipers & discs - the calipers will accept a range of disc sizes. For example, the KSport 8-pot calipers used with their 330mm discs also works with their 356mm discs. Therefore, your best bet is to contact a Porsche dealer/parts department and ask them what size discs that particular caliper accepts. When you get the brackets made up make sure they are made from either mild steel or preferrably aero grade aluminium. Also, make sure you use the highest rated high tensile bolts to secure the bracket to the hub and the caliper to the bracket. You really don't want to be scrimping money here ...

 

Good luck!

 

Dan

Dan,

 

Does this mean that you would not recommend larger discs with standard calipers? I thought you used to sell this upgrade (discs and relocation brackets)??

 

i think the general consensus would be that they are ok for street use to give you that little extra performance... but for track use (or if you use the streets like a track :rofl:) then you need to think of more serious upgrades. im sure dan will confirm his take on the subject as a trader though.

i think the general consensus would be that they are ok for street use to give you that little extra performance... but for track use (or if you use the streets like a track :rofl:) then you need to think of more serious upgrades. im sure dan will confirm his take on the subject as a trader though.

 

Spot on Joel!

 

Phil - I did used to sell our so-called "budget big brake upgrade kit" but it was strictly for street use only. It was always meant to be a "stop-gap" solution for people who were wanting to upgrade to GTR-33 calipers/discs but either couldn't afford it or couldn't find the calipers at the time. The caliper relocation brackets we sold as part of the kit were made so that you could swap the stock caliper for the GTR-33 Brembo jobbies without having to buy another bracket.

 

I still have a load of relocation brackets left unsold. Ideal for cars running 324mm discs and either standard or Brembo calipers. RRP = £80.00 but will sell to subscribed members on this forum for £50.00 incl. postage and new high tensile bolts.

I had some brackets specially manufactured so that I could fit Aston Martin DB9 callipers (Brembo) - these are fitted behind 19" alloys:)

 

Discs are 355mm x 32mm

 

Done by a company called Sykes Engineering in North Yorkshire http://www.sykoracing.com/

 

They are very good company for this kind of stuff.

Both mine and Mac's wheel hub spacers for the wide arch kits were made by them.

But, i was wondering, if you could

find some Porsche ceramic disks cheap, and if they fit the hub, have them drill/machined, but i dont know if this will be very realistic under heavy use?

 

Would be nice but the 911 ceramic brake option is about £25K from Porsche! :shock:

Right ive spoken to a few engineering shops, One called J G engineers in enfield is close and they seem to be keen for the job, Im dropping off my spare hub 330mm disc and caliper with pad to have it measured up see what they come up with. I mentioned mild steel which he said is fine but will rust, what can be used to keep it from rusting?

Would be nice but the 911 ceramic brake option is about £25K from Porsche! :shock:

 

Pocket change ;)

Right ive spoken to a few engineering shops, One called J G engineers in enfield is close and they seem to be keen for the job, Im dropping off my spare hub 330mm disc and caliper with pad to have it measured up see what they come up with. I mentioned mild steel which he said is fine but will rust, what can be used to keep it from rusting?

 

What about a coat of high temp paint or laqour? Or the sort of stuff they treat bling stuff with after is been polished?

I got a set of ceramic porsche discs im also trying to adapt, were lying around the workshop taking up space.

 

 

Hmmm i might paint them with some high temp piant, il see what i can come up with :D ooo i think i got some somewhere too

Right ive spoken to a few engineering shops, One called J G engineers in enfield is close and they seem to be keen for the job, Im dropping off my spare hub 330mm disc and caliper with pad to have it measured up see what they come up with. I mentioned mild steel which he said is fine but will rust, what can be used to keep it from rusting?

 

Get yourself a tin of red Foliatec Caliper Paint - Halfords sell it but it's cheaper online.

Will match the Porsche calipers in colour and the deep glossy look.

I've used it on my Brembo's and it gives a factory painted finish that never comes off or fades.

Get yourself a tin of red Foliatec Caliper Paint - Halfords sell it but it's cheaper online.

Will match the Porsche calipers in colour and the deep glossy look.

I've used it on my Brembo's and it gives a factory painted finish that never comes off or fades.

 

you cant bloody see the things anyhow, any colour will do lol

 

 

ps i was joking about the having ceramic brakes :D i wish

you cant bloody see the things anyhow, any colour will do lol

 

 

ps i was joking about the having ceramic brakes :D i wish

 

Thought it sounded like the brackets might be visible. Depends how fussy you are! Can certainly say that the Foliatec stuff is the dogs danglies though if you want to do your calipers.

 

I did wonder about the ceramic disks! I'd be selling them straight away! LOL

you cant bloody see the things anyhow, any colour will do lol

 

 

ps i was joking about the having ceramic brakes :D i wish

 

Lol for a minute there i did wonder where you worked!

Thought it sounded like the brackets might be visible. Depends how fussy you are! Can certainly say that the Foliatec stuff is the dogs danglies though if you want to do your calipers.

 

I did wonder about the ceramic disks! I'd be selling them straight away! LOL

 

I got loads of hammerite paint i will probably use, Il just paint them black , Hammerite does the job well

iv painted many calipers in hammerite... does the job a treat :)

I got my brackets chrome plated to prevent rust :D

 

But only my mechanic can see them LMAO

mechanic=mot guy LOL

If the caliper pistons really are bigger then you may have bad pedal travel as the master cylinder piston must travel much further to move the higher volume of fluid when braking. Also the ABS system might similarly have an issue doing the business if they ever lock up.

You can also fit brakes that are too big and lock up all the time.

I find it easy enough to lock my R33 brakes up at 80mph ish if i give them a hard jab and that's with 245's on the front and 295's on the rear :D

295'S!!! shizzle my nizzle!

Indeedy! :cool:

omg. 295 bet they cost a few pennies to replace. lol

 

Don't really cost much more than the 235's I used to have.

If you shop around online there's some good deals.

Think I paid around £110 for Falken FK451's.

The standard size tyres for my Clio Sport were not much cheaper than that.

 

I remember when I ordered my wheels I called in at Kwik Fit on the way home and asked how much for a pair of Bridgestone 285's and they wanted £450 EACH!

They said they would match anyone elses price though LOL

Told them they were taking the piss and left :tongue:

 

 

Well the brackets are made which cost more than the calipers lol, I painted them to protect from rust. with good ol hammerite which will take the heat.

 

 

Bought some heat treated ebc 324 discs, dont know how long they will last before they warp but its a start :D

 

The pads are a perfect fit to the discs surface, what a flook.

 

 

And i got me all the bolts to fit them in :D

 

Just got to pick up the car in a hour from the spray shop, then i can get working on fitting it all together.