scoobyc

iTrader: (2)

Alright chaps.

Well turned out i didnt use my AP's on the weekend track event due to being screwed over a bit, so i used my old 4 pot scooby calipers instead.


Now these brakes are not good enough for me on track anymore it seems (using my new sticky rubber). Dont get me wrong, the car still stops, but i dont have any confidence.

So i want to know. If my problems which im facing will be fixed when i get my AP's working.

Basically my brake pedal gets really long quite quickly. After the 1st flying lap on saturday i could smell my brakes in the car so eased off a bit. Fortunatly half of the lap didnt require much brakes so they had time to cool before the hard braking section again.

So if i get my AP's on. Should my loss of brake feeling, and long pedal dissappear?

My current brakes are subaru 4 pots on newish grooved disk with ds2500's.


Just trying to get some love and belife back into my brake upgrade to decide whether i bin em n carry on with 4pots or put some money in to get em working.

Cheers
Chris

D1CCY

Sounds like major overheating probs, are there smeared deposits on the discs - a sign of exceeding pad temp limits. DS2500 is a bit limited on temperature, I like it for a road pad but for me it doesn't have enough bite for track. Your APs should be much better (which ones?) but as they normally come with DS2500 pads you might consider Pagid RS42 or even 29. I use RS29 in 330mm 6 pots and they work very well.

scoobyc

iTrader: (2)

problem is D1CCY my track excursions are on an uber tight budget. Ive got the 5200's 4pots with 330 disks. however they are all second hand and of very questionable quality.

Just wanna make sure this is a "not up to scratch" problem rather than an inherent "get used to it" problem. So an upgrade should see a significant improvement?

The"kit", and i use the term kit loosly; try piece of **** wreck, i bought came with a new set of Red Stuff. With the cost of pads being rather astronomical i guess ill wear these out first assuming i can get the kit working properly.

Yes i need to rig up some serious ducting to my brakes. But want to do it as subtly as possible.

D1CCY

Cooling will certainly help. If you can't arrange ducting then just try to get some air behind the wheels by having holes in the front of the car (foglight covers off?) and cut holes in the back of the wheel arch liner. Try braking a little earlier to preserve brakes and this allows the car to be more settled in corners, you might even go faster.

scoobyc

iTrader: (2)

yeah my braking is pretty easy at the mo. Could certainly be braking much harder and later if i had the confidence that when i pushed the pedal it wouldnt just hit the floor.

Its generally been ok in the wet at brands(and the snow), at donny in the dry on road tyres without pushing the braking they were ok, a little soft but on the whole just good enough. Marham on the weekend on slicks at 50dec C tyre temp they just couldnt cope so had to be super careful.


So anyone get long pedal with Ap's and 2500's on track?

n8i

iTrader: (3)

hi

4-pot with hardened discs (processed with heat) and pads Carbon Lorraine should be a lot better than Ferodos

cheers
nico

RRH

If you haven't already done it, decent fluid and braided hoses will make a significant difference

Aztec Performance Ltd

iTrader: (234)

What are you using on the rear?

Godspeed Brakes

iTrader: (259)

Chris
If you are using slicks and driving hard on the track , then the DS2500 will never cope , especially with the 294mm discs and Subaru 4 pots , you need to go with a more aggresive pad , I run the subaru 4 pots on my rally car as I run 15" wheels for gravel events , I run either Ferodo DS3000 or Carbon Lorraine , and both are fantastic with no fade whatsoever , the down side is they are very hard on discs , especially the carbon lorraines , and they will make a mess of your wheels , but its horses for courses , running the best set up for track use will have its compromises.

The braking , and coping with heat , will be much better when running the 330mm discs with the AP 4 pots , obviously to a limit as there is only so much they can offer braking wise , but those limits will be greatly increased.

Regarding your brake kit you bought , if you wanted to fit better brackets to it I can sort them out for you , if you wanted to send me a caliper and disc and bell , and I can built it on a hub on my workbench and either see if my brackets I make for my kits would fit , or if not , make some to fit.
Or , adding up what you need to spend , if the discs are shot or near too , the redstuff pads are not something I would use , and it needs new brackets , it might be worth just sticking it back on ebay and buying a complete new kit , I can supply you one of my kit with AP 4 pots , all brand new parts with a choice of pad for £895 , if you were to stick with your existing kit , discs are roughtly £300 , pads £90 , brackets £150 , so around £550 to put your kit right , so for £350 more you get everything brand new , and getting money back from selling your kit on , doubt you would get any bids from anyone on here though

Hope this helps
Cheers Ian

stockcar

have always used RS15 Pagids in the 4pot Subaru calipers...............never found anything that got as near friction/feel wise (competition use anyhows)

alyn

scoobyc

iTrader: (2)

Thanks for the advice guys!

I need to refit the AP's this weekend to see if the disks are shagged or not.

i guess im not after race spec brakes just yet. Just something which copes significantly better and is cost effective. Im only using slicks cos they are dirt cheap and dont go off after two laps.


Ok so my original questions is answered. Upgrading the brakes will somewhat fix my problems with overheating the 4 pots.

The rest.. ill find out on sunday if im well enough...