My 312mm Brake Upgrade

[Dave 77]

As the title says i upgraded my 288mm brakes on my Boca to some 312mm ones

What u need is a set of carriers, caliper, disks and pads (the stock calipers that come with the cupra/boca are not quite right unlike i first thought)

I found out the hard way half way thought and had to try get a pair on a sat morning...fun (had to go to the TT shop in bedford, thx dave for driving me there and ur help )

Here are a few photos i took

New disks and carriers

New disk and old

Before

After

Only run a few miles so far but they already feel alot better than the old ones

I have also added a pair of Ferodo 2500 pads and they do now rip ur face off

 

[techie]

I hadn't thought about the springs sorry about that, didn't realise they were different but makes sense they would be. Done loads of 312mm conversions before but always used the complete set up.

 

[FR_Rob]

Can you do this upgrade with the standard Cupra barkes?

Where can you get the complete kit from Techie?

 

[Dave 77]

DW didnt think of that either at least we no now

 

[Octane2097]

may be upgrading my FRs brakes then now
im guessing this is the same or being an FR do i need anything diffrent?

id also be intrested in putting bigger disks on the back too, i know majorty of the brakeing is done by the front, but the back ones look tiny! want to upgrade for aesthetic reasons really

 

[dan_wilson87]

im geussing tht these are the standard calipers not the seat sport added extra ones...would i be right? if so tht makes it one hell of and easy conversion

 

[Dave 77]

yea standard calipers just need disks, carriers and spring thing

 

[dan_wilson87]

proper quality tht, i had a little race last night, had to stop quiackly as a local residant jumped in the middle of the f@*$ing road, nearly killed the fool and thn thought the car could do with some extra anchor power, how much better are the 312 discs, also could u put up a link. cheers

 

[Dave 77]

Still bedding them in will let u no as i put the miles on them

As for a link, where i brought them? If so its from Sere Motors http://www.seatcupra.net/forums/forumdisplay.php?f=249
But u can get them from anywhere really, same brakes as an S3, TT, mk1 leon, Octavia VRS a few golf and prob more

 

[Biker]

Excuse my ignorance here as I have probably misunderstood the post.

If you are using the same callipers and (assuming) the same pads, surely you are applying the same braking force to the disc as before so there would be no gain in braking performance. Possibly with a bigger disc it would dissipate heat better but in normal driving conditions how does this improve braking?

 

[Dave 77]

http://www.seatcupra.net/forums/showthread.php?t=259946&page=2

Check out post 22

With the bigger discs you will see better braking as there's a greater surface area for the pad to bite onto and they provide more leverage and also reduce fading.

 

[Biker]

http://www.seatcupra.net/forums/showthread.php?t=259946&page=2

Check out post 22

With the bigger discs you will see better braking as there's a greater surface area for the pad to bite onto and they provide more leverage and also reduce fading.

Fully agree that fade will probably reduce with the bigger disc.

But I am struggling to see how you have a "greater surface area for the pad to bite into" as this is the same size pad as before so the surface area has not changed.

The leverage thing, have I got this right. You are saying applying the same braking force but move it further away from the hub, will improve brake performance?

 

[Dave 77]

Its hard for me to exsplain.

Techie im sure will be able to exsplain better than me

 

[mardon]

This has me confused too. Wont you need a bigger caliper with bigger pad size to fully utilize the wider disk area?

 

[techie]

The disc isn't wider it's just further away from the centre of the wheel.

Flip the situation in reverse, try to start something spinning, is it easy to spin holding onto the centre or the outside edge? It's called mean effective radius.

 

[jc_boc]

WOOHOO!!! Higher Grade subjects this morning, too early hahahahahaha. The conversion does look good though, i love the way the bigger disc fills the wheel so much better.

 

[Dave 77]

Thx techie

It does look so much better then the 288mm ones

 

[mardon]

Oh I get it now!

Nice, its good you dont have to buy more expensive calipers. Are these any calipers with more bite other than going the whole 4-pot route?

 

[ibizaracebrake]

increased unsprung weight? prob not important, but worth understanding.

 

[techie]

Not really. Only option would be mk4 R32 brakes which are huge, but only twin pots and very expensive for new genuine discs.