All Things Mk5 > Performance Modifications
Rear Brake Pad Upgrades....
jabbalad:
In my opinion i would just stick some decent pads in the back, front wheel drive cars shouldnt use much rear braking... when your trying to do everything through the front wheels the last thing you want to do it to make the back too stable!
In a mid engine car it is possible to have more rear braking... because thats where the weight is!
For front engined front wheel drive its alwase going to stand on the nose when braking, no matter what suspension setup you have... so the front wheels have the most amount of grip to put the braking force through!!
at the end of the day when VWR (or any touring car team) build a car if there was an advantage to fitting huge rear brakes on a front wheel drive car dont you think they would use it?
Thats my part anyway, and i dont really need to justify this...
QD MBE:
--- Quote from: RedRobin on September 02, 2009, 01:14:58 pm ---....
Just thinking aloud, but both the oem R32 and S3 rear brakes will surely have been designed to work on 'driven' rear wheels (be it Haldex or quattro).
Does this suggest that fitting them on the rear of the FWD Mk5 GTI may be overkill?
Please note that I'm only raising the question and not saying that this is the case.
--- Quote from: stokeballoon on September 02, 2009, 11:31:53 am ---
Since i fitted my S3 rears the car is a joy to drive, the car feels balanced under braking, and the rear never gets "tail happy" under braking.
i was asked by an independent engineer as to what brakes I have fitted, he was impressed by the overall feel of the car, and he has the pick of any braking system, being in the 'race preparation' enviroiment.
I therefore rate the S3 rears was the 2nd best mod behind fitting my RNS510.
This is my opinion, and I would do the same again.
--- End quote ---
....But didn't you also fit S3 front brakes? So how are you able to judge the benefit of fitting only rear S3 brakes to a GTI/Ed30 as a mod?
--- End quote ---
Robin,
The way I judged is that the car feels far more stable. Sat in the drivers seat, you can feel the rear being braked, front brakes do not give that feeling. Thats how I judged.
RedRobin:
--- Quote from: stokeballoon on September 02, 2009, 01:53:45 pm ---
Robin,
The way I judged is that the car feels far more stable.
--- End quote ---
....I would suggest this is mainly due to the improved (S3 rather than oem GTI) front braking.
--- Quote from: stokeballoon on September 02, 2009, 01:53:45 pm ---
Sat in the drivers seat, you can feel the rear being braked. Thats how I judged.
--- End quote ---
....Then you must have a much more sensitive arse than I have! :laugh:
Janner_Sy:
to be fair i think even if the rear discs only cope with 15% of the overall brake bias moving from 256mm to 312 discs and bigger pistons and pads etc will still make a huge difference in the overall stopping power available.
I also agree that if the brakes were increased on the rear as well as the front(albeit not to the same extent) then the weight transfer and balance would be much improved especialy if braking mid corner, which does happen sometimes. ie coming around a bend to find stand still traffic, or carrying too much speed into a corner on a track and having to brake. both have happened to me before and ive felt the back step out a little.
However guys who have used the DS2500 on the std front 312 discs commented on the huge difference the pads made. So maybe that would prove to be more cost effective
RedRobin:
--- Quote from: simonskerton on September 02, 2009, 05:10:46 pm ---
I also agree that if the brakes were increased on the rear as well as the front(albeit not to the same extent) then the weight transfer and balance would be much improved especialy if braking mid corner, which does happen sometimes. ie coming around a bend to find stand still traffic, or carrying too much speed into a corner on a track and having to brake. both have happened to me before and ive felt the back step out a little.
--- End quote ---
....Having to slam on the anchors extremely hard when coming round a blind bend has happened several times to me and I've been very glad to have the AP's - How my rear oem brakes behaved I have absolutely no idea! It was furthermost from my mind.
However, on a faster bend with open visibility or roundabouts, I tend to get all my braking done while the car is still straight even if I'm not going in as fast as I could be. At least with the Quaife it helps me get back on the power very early. But as you say, we can still get caught out.
--- Quote from: simonskerton on September 02, 2009, 05:10:46 pm ---
However guys who have used the DS2500 on the std front 312 discs commented on the huge difference the pads made. So maybe that would prove to be more cost effective
--- End quote ---
....I'm looking forward (I think!) to seeing how just the DS2500 pads work on my oem rears at The Ring, if indeed I can feel a difference.
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