because these front are so cheap, $2000 fitted and tested for k sport 8 piston fronts, 330mm slotted rotors, braided lines and pads, too cheap to pass up imo.

Are they new and ADR approved ?

That is a awsome price for 8 piston calipers AND rotors

They are new, I still havnt checked out whether they are adr approved yet though. Heres a pic of them

I think the handbrake cog thingo is on the inside of the rear disk and the front disk wont have this, so it is defn goodbye to handbrake

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He has only asked if you could fit the 2 spot std caliper not the front rotor as well to replace the 1 spot that's std.

Edited December 4, 200619 yr by rboksic

Will need thicker disc's on the back to go with the front calipar assy as the standard front dics is a lot thicker than the rear disc.

The pads and pistons will have to much travel on the thinner disc causing major problems as the pads and pistons may became dislodged.

Ian

It's intersting FPV use a huge 4-piston caliper and rotor on the front but a single piston on the back.

I would think cost is the reason, dunno why when you consider how much extra is spent on other bits. Just remember (in theory) that a single piston sliding caliper has the same braking force per pedal pressure as a dual piston of the same size I.e. the brake fluid pressure at the single piston is double that at a twin piston caliper. The force is transferred to the sliding side and therefore halved, making it equiv to 2 pistons of the same size.

Saying that though, there must be some loss in efficiency with a single pot setup simply due to friction in the sliding mech. Any thoughts anyone? Whenever I change pads on a "slider" the pistion side pad is ALWAYS more worn than the other - not by much though.

I still reckon you just simply measure your front and rear piston areas to get the ratio. Just remember your single piston caliper is X 2. This will give you some confidence with what you're about to embark on when increasing piston area. Mind you, many multi-piston (6+) calipers have smaller pistons so the new piston area may only be "marginally" bigger than standard, its just the barking area is increased via BIG pads - a GOOD thing!

Thanks for the info, yea those k sport calipers only have quite small pistons so im guessing the overal piston area wouldnt be too much bigger. I should be getting these fittted sopme time after christmas, I will post up how they perform then.

Thanks for the info, yea those k sport calipers only have quite small pistons so im guessing the overal piston area wouldnt be too much bigger. I should be getting these fittted sopme time after christmas, I will post up how they perform then.

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A 330mm rotor is quite small too. The stock F6 front rotor is 355mm and I'd be interested to see how the two compare but I'll say I think the 4-spot F6 setup would work better on these big heavy cars than the smaller 8-spot setup. Most of the Europeans cars I've seen that have 8-spot calipers have massive rotors 0f 380mm+.

The Electronic Brake-force Distribution system should compensate at least to a degree for an improved / changed brake set up, shouldnt it?

BTW Do BAs even have a brake bias valve given that they have ABS + EBD both of which are controlled / varied in real time?

I have the option to get these brakes with a 356mm rotor but they wont fit under my 17s so im opting for the 220mm, which apparently is so tight you cant fit a finger between the caliper and wheel.