steveairdrie

Hi

I'm thinking about changing my alcon 4 pot calipers on my p1 to the k sport 8 pot kit from the group buy. Can anyone tell me if this would be worthwhile in terms of the difference in performance between the two calipers

steve

stockcar

the main problem with both kits IMO is the quality of the rotors in std form.......in terms of caliper quality the Alcon wins hands down

get a good 2pce conversion for your alcon kit and decent pads and it will be transformed in my experience

alyn

every1sgottablue1

I'm running the 2 piece Godspeed discs with the Prodrive Alcon calipers, and prefer them to the STI Brembos

every1sgottablue1

P.S Ferodo 2500 pads aswell!

Saalro

iTrader: (8)

What's up with the K Sports then? Both are alloy aluminum, so light weight, yet K Sport has the advantage of 8 pot.

Thanks,
Sam

malpas1977

know exactly whats going through your mind mate, i had the same long hard thought few weeks ago but came to the conclusion that the alcon calipers are far more superior than the k sports( my opinion) so only need to find a good rotor and pad set up.I'm currently waiting for a price back on some bells and rotors. will let you know how much they cost so you can decide for your self if worth having some made or change to the k sports. hope this helps

172sport

iTrader: (6)

Why do you think more pots is an advantage?????

4 pots are perfectly fine

Godspeed Brakes

iTrader: (259)

Exactly , most people see more pistons so automatically think its more braking power , it isn't , but its good marketing !

When you see 8 pot calipers on a race / rally car , they are nothing like the 8 pot road kits , 8 pots like these are a sales gimick which most fall for , a standard master cylinder can only move so much fluid , you fit over size , or too many pistons in the calipers and the master cylinder can't cope and the pedal hits the floor.

Rally and race car set ups run a bias pedal box set up , which is basically two master cylinders fitted in tandem which is adjustable to set up the braking ballance between the front and rear , a bias pedal box has the two cylinders next to each other , one for the front and one for the rear , these are available in different sizes to suit the application they are going in , so if your fitting big brembo or AP 8 pot calipers the system can be designed to work.

The problem with these road 8 pot calipers , is that they have to have very small pistons for the master cylinder to cope , and the problem in my opinion running small diameter pistons is that you dont spread the pressure from them over enough of the pad , the pressure point on the pads is just a thin line running up the centre of the pads , when running 4 or 6 pot calipers the pistons are wider , so spreads the pressure from the pistons over a larger area on the pad. it would be better if the pistons on these road calipers were staggered as this would spread the pressure over more of the pad.
Otherwise I see no real benifits fitting the 8 pots over Alcon or AP's , other than the price , but as they are made in China , a UK made product will never compete on price , unless you can find some UK workers to work for 25p a day ( if you do find any , send them my way lol )

Hope this helps
Cheers Ian