2008 Polo GTI 9N3 brakes and brake master Cylinder upgrade - ESP question

[pologtiforfun]

using insert image icon....is there any restrictions on size etc

[sambb]

um not sure. most of mine are straight off the phone. sometimes it'll let you just copy and paste.

[pologtiforfun]

yeah i'll try again when i have a bit more time...under the pump at work at the moment so running out of hours in the day / week

[pologtiforfun]

put the rear brake calipers, and discs on today, the new 2003 Bora v5 carriers worked a treat.....will bed in the new seals, pads and discs in and see how the brake pedal feels. Will also see if i can attach the pics correctly

Had gentle reminder maybe weight one side of disc and caliper to compare.....difference was about 1kg so not alot in the scheme of things.

forgot to weight the fronts so didnt know the difference on those....does anybody else ?

[pologtiforfun]

Pic of rear brake upgrade

[pologtiforfun]

Another pic

[pologtiforfun]

Hopefully got the pics sorted....tried uploading them from my phone.. sorted out the previous pics too

[pologtiforfun]

So will give it a week or 2 for the rear brakes to bed in.

in the meantime now thinking of the next little projects to do

Have 2nd O2 sensor on it way, computer threw up the error so will be fixed shortly

upgrade divert valve - maybe GFB anyone have experience of thoughts this or other options ?

shortshift kit

downpipe is on the radar too alon with highflow cat

will also do light upgrade thinking the white lights for parkers, headlights and fog as oppose to the current yellow coloured globes

[simon k]

intercooler, then downpipe and cat - I'm on that path now

Basically the way I figure, you can't really go downpipe and cat without a stage 2 tune, you need the intercooler to be able to go stage 2, so the intercooler comes first. It's still worthwhile having the intercooler while on standard tune, and it's a good idea for stage 1 tune.

Do you mind summarising the front and rear brake parts and the best/cheapest VW/Audi models to get them from?

[pologtiforfun]

Hey Simon,

I missed adding the bits....i have already done the TIP, Front mount intercooler,(forge) and throttle body pipe upgrade....also done the suspension, kw3....sorry i was lucky just kept working away and looked online when things were onsale often get 20 to 30% onsale plus the 20% vat discount as outside the UK ends up a good buy at times.

My logic is always upgrade the handling and stopping....upgrading the suspension first as you can always enjoy the upgrade to the handling, then its always great to be able to stop !!!.....then onto upgrading the power.

As for the brakes my quick summary, and i am referencing a bit of Gav's here......so Gav feel free to correct me if i am wrong.

If i did it again i would go the 125kw Bora V5, believe thats the 2001 onwards as they have the 256mm rear ventilated discs. The rear calipers and carriers bolt straight on. I did buy a piston and seal kit.....just as they are used brakes so may as well rebuild them while i can. If i did it again i would have pulled the pistions and checked, if nothing wrong just order the seal kit then rebuild them.

( I have a spare pair of rear calipers minus the carriers if anyone wants a pair going cheap )

Fronts i believe on the bora are the same 312mm as the audi 8N TT ( gav can correct me if i'm wrong) Gav said "the Polo, which I would identify as 9N3. That includes, Bora, 8L S3 and 8N TT" again same in regards to the piston and seal kit as per the rears

Also highlight that the brakes take a week or so to come up to speed as new seals take awhile to bed in and come good. the brake pedal feels long until they do.

I think the S3 are twin piston calipers on the front still the 312mm.....not sure about the rears though.
the 8L i have no idea about that one.

Again hunt around on gumtree or ebay and wreckers....

[h100vw]

Corrections , The front calipers on the S3 etc are in fact the same part as the MK4 GTI, it only the caliper brackets that turn them into 312mm. The Golf is 288mm.

Its important to know that the std Polo calipers will NOT fit the S3 brackets.

[pologtiforfun]

All Good Gav..... i expected you to chime in with corrections

by the way Gav, which calipers are the twin piston ones ?

[h100vw]

Some oldAudis had them, nothing in the MK4 chassis did.

[sambb]

I read somewhere that S2 calipers were twin piston. Think I read it in a 6N track car blog- are they even available?
Oh and he was able to fit them under VR6 BBS 15's!

[pologtiforfun]

i think they fit under 16's but dont seem to have that good a reputation, the S2's from reading were under braked.

I'm away for work, so will be back for the weekend to get a few more km's up over the weekend and bed in the pads and seals