Prosport brake discs

[Jackard]

Hi,

I've to replace my brake discs on my prosport.

with kind of discs do you use?

does anyone could give me some manufacturers reference (brembo,ferodo,....)

Regards.

[LCM]

Jackard said:

Hi,

I've to replace my brake discs on my prosport.

with kind of discs do you use?

does anyone could give me some manufacturers reference (brembo,ferodo,....)

Regards.

Good news Jean-Christophe!

Forget Brembo, Ferodo, AP, Performance Friction.

Think instead Ford Escort!

Assuming that you have original Wilwood calipers and you use 240mm vented discs, then what you want is 240mm Ford Escort Mk4 1.4 Vented; if you have 260mm discs then you want 260mm Vented Ford 1.6 RS Turbo. All available from your local Ford dealer. Or if you want a choice of grooved or drilled then try http://www.rallydesign.co.uk/login.php. Think E50 a pair and bless Henry Ford and BIG R............

A bientot mon brave.

[Jackard]

Thanks a lot Lindsay.

you are truly the Prosport's encyclopedia

Have you ever tried Drilled or Grooved brake discs ?

[LCM]

Jackard said:

Thanks a lot Lindsay.

you are truly the Prosport's encyclopedia

Have you ever tried Drilled or Grooved brake discs ?

If you speak to a real brake expert (like Jonathan Lane at http://www.techcraft.co.uk/ or the boys at http://www.rallydesign.co.uk/) they will tell you that grooved AND drilled discs are for Boy Racer cars (I don't know how this translates to French except literally as "jeune conducteur imprudent" but know that there must be an idiom) and are more Show than Go. They therefore suggest either grooved or drilled but not both and as drilling weakens the disc and increasees the risk of cracking the best choice is either plain or grooved. I have plain solid discs on the Force (but it is only 350kg and I use very soft pads), grooved and vented "Big brakes" on the SR8 and I used grooved and vented discs on Black Betty (starting with Ford type discs from Rally Design with Wilwood calipers and Hawk Black pads, then moving on to Hi-Spec "Big brakes" with PF01 pads, which together were at least twice as good as Ford/Wilwood/Hawk).

Allors, c'est tout mon brave.

Bonne Chance!

[splitpin]

As most of us have seen how the OEM 'just grooved' articles (whether vented or non-vented) eventually 'surface craze', I reckon drilled discs on a Rad might actually be a potential recipe for a catastrophic failure; for sure, I'd stick with plains or grooves on such a relatively small diameter disc.

Lindsay, I'd guess the superiority of the Hi-Specs C & Ds & PF01s over Wilwood Cs/Ford Ds & Hawk Blacks would be mostly down to the calipers? I.e. Ws tending to be wooden when cold and flexy when hot/used in anger?

[LCM]

splitpin said:

As most of us have seen how the OEM 'just grooved' articles (whether vented or non-vented) eventually 'surface craze', I reckon drilled discs on a Rad might actually be a potential recipe for a catastrophic failure; for sure, I'd stick with plains or grooves on such a relatively small diameter disc.

Lindsay, I'd guess the superiority of the Hi-Specs C & Ds & PF01s over Wilwood Cs/Ford Ds & Hawk Blacks would be mostly down to the calipers? I.e. Ws tending to be wooden when cold and flexy when hot/used in anger?

You've got it Trev.

Individually, the Ford type discs and Hawk Black compound are OK (in fact Hawk Black is an impressive compound if you ignore the disc wear rates [but, at Ford type replacement costs, this really shouldn't be an issue compared with the rest of your costs]). However, bearing in mind that we are talking top of the range W calipers, for those of us who really use the brakes (late and hard), they just aren't sufficiently rigid to transfer all that leg work to the job of clamping the pads to the rotating discs.

Hi-Spec/PF01 is a different kettle of poissons entirely. PF01 is very linear, so if you want to increase the braking rate you push the pedal harder (this is disconcering at first if you're used to the self-energising feel of a rising rate mu but is easy to adapt to and intensely logical). Plus, the calipers are very rigid and with a bit of tweaking of cylinder sizes one can end up with something that is a bit like a DS19 pedal of blessed memory (solid but responsive and inspiring great confidence). Under competition conditions the braking effect of the HiSpec BIG brakes on Betty and the Force brakes is within - 0.1g (at around -2.0g). However, under test conditions, I did show -4.0g with the HiSpecs which is better than the Force performance under similar conditions. Now, call me smug if you like, but I reckon the -4.0g is pretty impressive for a pile of old Cambridge gas pipe flying in loose formation............