The a1rms are another level of sharp now I bedded them in. Like hitting a wall.
Above Forum Ad
Collapse
Announcement
Collapse
No announcement yet.
Rear brake upgrade
Collapse
X
-
-
Originally posted by Blue9N3 View PostBigger brakes are usually to reduce fade, to brake more consistently , not necessarily brake harder (although larger brakes would probably allow you to stop quicker from a very high speed, say 200++?)
Originally posted by Blue9N3 View PostMore than likely, stock or larger brakes would stop in the same distance on the first stop from 100kph, but by the 10th stop, I know which one id want
Even on track, brakes are one of the least important components in achieving ultimate lap times - I got within a second of my best lap time at Sandown (which is very hard on the brakes) after air got into the system and the pedal was almost going to the floor. It's unnerving but as long as the brakes still work you don't actually go that much slower.
If you are RACING (as opposed to doing timed laps, happy laps, hill climbs), then braking becomes much more important for the TACTICAL advantage when passing or preventing a pass but as long as they don't fade right out, the effect on ultimate lap time is actually quite small since you just don't spend that much time braking.
Originally posted by louis19 View PostI can assure you my stock sized brakes don't compare to Gav or Seans bigger brake setups. I find the Remsa and DBA T2 rotor combo a good upgrade over the stock rotors and pads, but they simply can't stop the car anywhere near as quick as Gav or Seans regardless of if its the 1st or 10th time.
Originally posted by h100vw View PostThe a1rms are another level of sharp now I bedded them in. Like hitting a wall.Resident grumpy old fart
VW - Metallic Paint, Radial Tyres, Laminated Windscreen, Electric Windows, VW Alloy Wheels, Variable Geometry Exhaust Driven Supercharger, Direct Unit Fuel Injection, Adiabatic Ignition, MacPherson Struts front, Torsion Beam rear, Coil Springs, Hydraulic Dampers, Front Anti-Roll Bar, Disc Brakes, Bosch ECU, ABS
Comment
-
I absolutely understand your position, it all comes down to the lowest common denominator, which is typically the tyre grip. The difference in lap times between my silver car and red car also supports your position that brakes don't save significant time on the track.
With all that said, when I'm coming into a hair pin at ~190kph with an apex speed of ~80kph, it's nice to know that when I go for the brakes, I'm going to have a pedal, it's hugely confidence inspiring. I guess it's about feel and confidence. There ability to slow you down immediately as you apply at that high speed is much greater than I've experienced on a small rotor, part of it is purely down to leverage too.
On a 288mm set-up with Remsa (not a track pad), I was exceeding their performance window. I couldn't put the car on it's nose on successive laps. On the 312mm with Remsa, they lasted and felt better, great when new, but were deteriorating in feel after track time, or particularly if I'd overcommitted to a corner, the pedal took half a lap to come back. The A1RM's are operating in their designed temperature window (at the lower end according to my rotor temps) and maintain feel for the drive home. Perhaps a track suitable pad on the 288's would be suitable, though you also can only get a DBA T2 rotor, not a T3... relevant or not I don't really know. I do get the occasional squeal with the A1RM's when cold, but feel is still fine.
Though we've probably hijacked the hell out of the OP's thread, sorry dude.
In short, IMO, it's a waste of money if you aren't utilizing the upgrade, or currently reaching limits of the factory set-up, which, with good fluid and pads, can be quite effective to run hard.Track Car: 06 Polo GTI Red Devil mkII
Daily: 2010 VW Jetta Highline
Gone but not forgotten: 08 Polo GTI
** All information I provide is probably incorrect until validated by someone else **
Comment
-
Unless fade is singularly your biggest problem I dont really see the point of having braking power way beyond what your tyres can handle or the point at which ABS will kick in. eg time attack cars pull up from F1 speeds on tiny little brakes. Fade avoidance over time is not their enemy but unecessarily high rotating weight and unsprung weight is. They certainly have the braking power to do it though even with relatively small brakes.
Why shell out for the lightest rims and then fill them with excess braking weight. Then you're still at square one in the unsprung weight department and end up with arguably more or less the same braking power especially if your on more streety track tyres.
Comment
-
Originally posted by rgvlee View PostI'm more thinking of doing it 'because I can'
Make it happenTrack Car: 06 Polo GTI Red Devil mkII
Daily: 2010 VW Jetta Highline
Gone but not forgotten: 08 Polo GTI
** All information I provide is probably incorrect until validated by someone else **
Comment
-
Well they were lot closer than I thought, trackday yesterday finished them off.
Will try to source on Monday otherwise I'll have to throw stock gear on.
Chasing some early audi tt leads.
There is a thread on another forum listing rotor sizes for the various models that fit mk4 golfs, I'll post up the details later interesting reading.08 9n3 Polo GTI
Mods: heaps
Comment
-
Sorry to all who may have thought i was saying a bbk is a waste of money. It does have real benefits in the right circumstances but I'm trying to put the focus on where these real benefits are as opposed to what some people may assume without thinking through the underlying physical factors and limitations.
Rgvlee, that's as good a reason for the upgrade as many of the things we do. Eg last night I used a trim sealant on my tyres and the nut caps.Resident grumpy old fart
VW - Metallic Paint, Radial Tyres, Laminated Windscreen, Electric Windows, VW Alloy Wheels, Variable Geometry Exhaust Driven Supercharger, Direct Unit Fuel Injection, Adiabatic Ignition, MacPherson Struts front, Torsion Beam rear, Coil Springs, Hydraulic Dampers, Front Anti-Roll Bar, Disc Brakes, Bosch ECU, ABS
Comment
-
On a Polo there may not be enough rubber on the road to gain a lot more braking but I would still expect more capable braking with lower pedal pressure
On my Octavia I have 6 piston calipers and 357mm floating rotors - with good rubber ( Goodyear F1A1 225/40/18 ) it certainly brakes significantly harder than a standard Octavia
(In order to get that extra braking I had to get into VCDS and set the anti lock braking to low/late because the car could now brake harder/faster than the onboard computers though was possible)
Around town and during rush hour driving it's less fatiguing because much less brake pressure is required - yet modulation control is still good
2012.1 Skoda Octavia VRS DSG Wagon - Carbonio cold air intake and pipe - HPA Motorsports BBK 355mm rotors 6 pot calipers
APR Stage II ECU - APR 3" exhaust down pipe & high flow catalyst
APR/HP Roll bars - Eibach springs and Bilstien shocks
Supaloy lower control arms - Enkei 18*8 Wheels
Comment
-
This is the thread I was talking about
The Mk4 Brake Upgrade - Sizes/Info
Heres all the brake sizes on the VAG range, and what they are fitted to as standard.
VW Golf R32 | Audi TT 3.2 Quattro
The Front brakes are 334mm x 32mm Vented 2-piece Discs, Twin piston(32mm/42mm) calipers
The Rear brakes are 256mm x 22mm Vented Discs, 38mm Lucas singles
Seat Leon Cupra R
The Front brakes are 323mm x 28mm Vented (grooved/drilled option) discs with 4 piston(34/38mm) Brembo calipers
The rear brakes are 256mm x 22mm Vented , with 38m Lucas single piston calipers
Audi TT-Quattro (225hp) | VW Golf anniversary | Golf GTI AUQ | Skodá Octavia VRS | VW Golf V5 170 | VW Golf V6 4 Motion
The Front brakes are 312mm x 25mm Vented Discs, 54mm ATE single piston calipers
The Rear brakes are 256mm x 22mm Vented Discs, 38mm Lucas single Piston calipers
Audi TT (180hp)
The Front brakes are 312mm x 25mm Vented Discs, 54mm ATE single piston calipers
The Rear brakes are 232mm x 9mm Solid Discs,
Golf GTI 1.8T | Golf 130/150 TDI | Golf V5 150 | Seat Leon 130/150 TDI and 20VT
The Front brakes are 288mm x 25mm Vented Discs, 54mm ATE single piston calipers
The Rear brakes are 232mm x 9mm Solid Discs
Golf 2.0 8v | 1.8 | TDI 115 | TDI 110 | TDI 100 | TDI 90
The Front brakes are 280mm x 22mm Vented Discs, Single piston calipers, caliper carrier integrated into hub (FS III's)
The Rear brakes are 232mm x 9mm Solid discs
Golf 1.4 16V | Golf 1.6 16v | Golf 1.6 8v | SDI
The Front brakes are 256mm x 22mm Vented Discs, single piston calipers, carriers integrated into hub (FS III's)
The Rear brakes are 232mm x 9mm Solid Discs08 9n3 Polo GTI
Mods: heaps
Comment
-
OK I've managed to find a set of calipers off a 2000 S3 as well.
What's the best way to ensure any of these will fit? They are all on the otherside of the country so I can't pop in an check before I hand over coin.08 9n3 Polo GTI
Mods: heaps
Comment
-
They will fit Lee. You need the calipers and brackets.
Comment
-
Originally posted by rgvlee View PostThe 2000 S3
or 99 TT quattro?
or Both?
Both are about the same price.
And yeah I'm onto the calipers and carriers.
When ordering rotors/pads, do you just order them for a 2000 S3?
If you get pads from GSL/Brakes Direct Matt knows what you need. Otherwise, correct S3 pads.
Gavin
Comment
2025 - Below Forum
Collapse
Comment