scoobyc

iTrader: (2)

This is a VERY preempting thread people. Dont intend on buying for a good 6 months yet.

But after reading tons of stuff about breaking, which setup/models should i be going for.

If i decided to go brembo, which are the best/best fitting for track/fast road use from what year models? What do look for. Titanium pistons?

If i find some AP's on the go, should i hold out for Ap's? If so which model should i be holding out for?

I assume the biggest disk size i want to go for is 330mm.

Ideally they should fit under 17's too.

Where can decent pads/disks be sourced for reasonable price for each? Is there a difference? Godspeed do all?

Also i will be going for 2nd hand stuff only. Cant afford new and its to fit a clasic. So if there is a ranking of goodness that would be fine. I dont need the top of the range stuff, but need to know what i should be keeping an eye out for.

Thanks

tanyatriangles

iTrader: (2)

I'd drop Ian at Godspeed an e-mail, he does a Brembo conversion for classics, including 2-piece discs, which he guarantees even for trackwork.

AFAIK, no other trader does this, plus the Scooby OE Brembos off later cars don't fit under 17's.

Jamz_

iTrader: (12)

Depends which 17 inch wheels you have... ive got two sets of 17's and they fit over brembo's

scoobyc

iTrader: (2)

True.

Can i get some caliper model numbers/years to look out for? I dont want to hastle Ian yet as i dont intend to purchase for a while yet. Was after some communite advice.

scoobyc

iTrader: (2)

anyone point me some ball park figures?

Any brembo up to 05 fit classic?

Should i be going for the 4 pot or the 6 pot AP's?

Do the differing colourd brembos represent an actual difference in the caliper?

Jamz_

iTrader: (12)

Here's what i have atm... its has brembo's on the car (dunno what year they are from) but im having problems on track with them atm...

It seems that the brembo's must have bigger pistons in then standard, so the rear end locks up under heavy braking (normal for track use)

So now i have to remove the ABS, and fit a brake bias kit into the car to get it working correctly

I would go with AP's or standard with some performance disks/pad combo

scoobyc

iTrader: (2)

surley brembos should increase the bias to the front with the larger pad/pressure area?

Or is it the case the brembo piston size etc is just not designed for the classic setup?

scoobyc

iTrader: (2)

So are any of the Brembo's suitable for the classic STI master cylinder to keep the brake balance and ABS working?

Jamz_

iTrader: (12)

The piston size is not designed for the classic... it takes more push on the pedal to put more fluid into the piston to push the pad on the disk, but pushing more on the pedal sends more down to the rear end which causes the rear to lock up.

To fit a brake bias kit into the classic, this means you have to remove the abs, Tee both the rear brake lines into one, fitting a bias valve and then into master cylinder.

scoobyc

iTrader: (2)

What year/type of brembos have you got?

What car have you put the brembo's onto? STI? what year?

BlueBugEye

iTrader: (12)

I've got the Godspeed AP330mm 4pots on mine and can safely say they are amazing!

Fangoria

iTrader: (1)

JamZ
Does that mean permanently no ABS then?

ScoobyC
Depends on your power

I found on a 260bhp WRX that the standard set up just about coped on Track

sti5 classic with a fair bit of power with several track days a year with a good suspension set up! (Exe-TC)
AP 4 Pots are generally fine and I have 308mm set up to go under 16's
I also have an AP 6 pot 355mm set up to go under 18's

AP 6 pots are too strong at the front and you can easily lock all wheels and it can be squirmy under breaking - tend to find I have to do a soft brake and then a hard brake into corners on track, if I go straight into a progressive instant hard brake it can lock the wheels

With the smaller set up I can go hard onto the pedal at the last minute.

My sti5 has over 450bhp, I think if you have 400bhp or less a 6 Pot kit is a waste of time - I'd probably go for 330mm on AP 4 pots - dont know about wheel sizes as stated I have 16's and 18's

I'm no expert though - I just drive the car and have standard, ap 4 and ap 6 pot
I dont like Pagid - I love DS 2500...............

scoobyc

iTrader: (2)

thanks for the info fang.

Are there differing AP 4pot calipers i should be looking for?

Im running pretty much stock power on an STI and the stock brakes are not up to the job. Im not very hard on the brakes either. They have lasted and lasted well but they are going to need to be replaced at some point. and so upgrade will be a good change.

Fangoria

iTrader: (1)

I think the Calipers are slightly different sizes depending on what disc you have
for instance the 4 pots I have would not be able to accomodate a 355m Disc (I think you can get brackets to space out the Calipers more. You do need the Braided hoses and Dot 5.1, whatever you do, do NOT purchase Pagid Blues, fckin terrible ****ty stuff that cannot take the weight of a car over 1000 kg's

The kits are all virtually the same price.......... - I wouldnt trust 'equivalent' copies, just stick with AP you cant really go wrong

2nd hand you probably cant go wrong if its AP

You probably want the biggest 4 pots you can get under the wheel without the need for spacers

Oddly the 4 pot AP's I have at 308mm to go under 16's are more than up to the Job (I switch between 16 and 18 inch wheels and the only reason I have another kit is that I needed some brakes quickly once and thought bollocks I'll buy a whole new kit as a spare and all that was available at short notice where I was, was the 355m 6 pots, otherwise I'd have gone smaller)...... no comparison with the standard sti set up which quite frankly are terrible

I have single pots on the rear, uprated discs and dont need much more as most of the braking is at the front so upgrading to 2 or 4 pots at the rear is a waste of time - though I will be changing the brake bias to use the rears a bit more and avoid locking them with the 6 Pots

I may sell the 4 pots on, maybe in 6 months time........................... :-) but might not...... need to use up the 16 inch tyres at a track day in August.......(Discs not used)

Jamz_

iTrader: (12)

Aye... not like it works properly anyway...

This was from my last track day:
YouTube - Croft RSOC 2009 - Jamz Spin

scoobyc

iTrader: (2)

Thats pretty shocking stuff Jamz.

Noone else seems to report this witht he brembo setups on the classic?

You got the red or the gold ones? Is there a difference?

scoobyc

iTrader: (2)

Did the car originally come with the 2 pots or the 4 pots up front? Could it be that the large 4 pot standard cars dont have this as the piston area is not too dissimilar to the 4 pots. However is significantly different tot he 2 pot fronts which is causeing this massive brake imbalance?

Jamz_

iTrader: (12)

There are a few people claiming the same type of problem with the brembo's...

Not sure what was on as standard as i purchased the car as is with the brakes that are on it... not sure what colour they are either as they had been painted red (badly) and are now silver.

The only way i see it is to fit two brake bias valves at the rear (to keep the abs) or fit one brake bias valve at the front, removing the abs and connecting the two rear outputs into one.