a bit of brake judder advice required

[Dynion Araf Uchaf]

Hello

I am currently using a Renault Twingo RS for track days.
It is a great car for this, however I am going through pads and discs at an alarming rate. So far in 6 track days and 1000 track miles I am on my 4th set of discs and 3rd set of pads.

Discs - used slotted ebc and green stuff. Lasted less than 200 miles, the discs warped massively and the slots acted like a cheese grater and sliced the pads to 1mm.

Since then I have used, OE discs, and OE pads, Mintex Discs and OE pads and Mtec discs and OE pads. All result in the same significant judder under hard braking after a days hard lappery. My most recent set of pads have done 300 track miles and are 50% worn which I don't think is too bad. But the discs/pads on the car are undrivable at race speeds.

So I am assuming that the soft pad compound is transferring material to the discs to make them warp. But I might be wrong.

Would a race pad like a ds2500 Ferodo limit this effect?
Should I get my existing discs skimmed/skimmed to the hub?

Anything else you can think off that will reduce that amount of braking parts I am currently using.

I would like to think that a skimmed disc would allow me to use a Ferodo pad for 4-5 track days, with the pads maybe lasting 2-3. Or am I dreaming?

tia.

Edited by Dynion Araf Uchaf on Wednesday 15th January 07:54

[Dynion Araf Uchaf]

there are few pad options available beyond green stuff ebc and OE or OE equivalent. ferodo are the only other option, I've used them before on the race car and I thought they were ok. They may be ok on lighter cars.
Discs are vented, I could maybe look at some cooling, but I might try in the first instance a home attempt at skimming the disc.

[Dynion Araf Uchaf]

the car doesn't have any backing plates. At the moment the issue is using standard pads, they are too soft and transfer material onto the discs. Carbon Lorraine do a pad for the Twingo but they are £200, which is the cost of 5 pairs of discs. And I suspect may stop warping but may not last longer enough to justify the price.

I am inclined to continue with the standard set up and the current upgraded brake fluid, I don't get any fade. But I have purchased a wire wheel to grind the imperfections off my old discs as they are still up around 24mm thickness, if it works then I may be able to recycle my collection of discs for sometime. I'll know in a month or so.

Edited by Dynion Araf Uchaf on Wednesday 15th January 07:55

[Dynion Araf Uchaf]

update, have purchased some new mintex discs and CL rc5 pads. Initial use whilst bedding them in yesterday on the road is comical. Sooooo, much more stopping power, maybe 50%. ABS much easier to trigger, Was not expecting that!

Looks like pad is not sitting right in the calliper as only about 50% of the disc face appears to be be used. Will be interesting to see how it goes on track