I am so confused about brakes, now i dont know a huge amount of info on brakes so bear with me...
I currently have a full UK setup which soon is going to be in need of new discs pads etc, when I do this I am going to refurbish the callipers with new seals etc. However I must admit I am drawn to the big brake conversion's and have been researching them when I get a chance now and then.
Now I know this subject has been resurrected time and time again on this forum however I have yet to see any "proof" on some of the claims with regards to performance made between the cheaper and more expensive 2 piece (non monoblock) calliper kit brands (Ksport, D2, Hispec vs AP, Brembo, Alcon etc), please bear in mind that most of us use the supra as fast road or sometimes track use and this post is written with that in mind.
As far as I know one of the major issues with braking is down to how much grip you have on the road, the better grip you have on the road the less chance of the brakes outperforming this grip and causing the wheels to lock.
Now as the stock UK brakes can outperform the amount of grip the tyres have on the road means that the limits of the car braking any more quickly (distance from xMPH-0) cannot be improved by the brakes even if you install a big brake kit.
Now the cheaper end of big brake kits have been mentioned on here as performing the same or slightly worse than UK spec brakes, however I can probably bet that these "cheaper" brakes are just as capable of causing the wheels to lock when braking hard (therefore outperforming grip as mentioned before, and if they didn’t then I am sure we all would of heard about it). So therefore in terms of outright braking performance these have to perform the same as OEM brakes as its the grip that determines this. So I beg to ask what makes the more expensive brakes better?
I assume the only reason why you would purchase a big brake kit is for repeat braking performance (like for use on a track) or for aesthetics.
Now I have seen from the comments on here that the more expensive callipers use better materials in order to decrease the amount of flex on the calliper than the cheaper brands, I cannot see any proof if this "stiffness" makes a huge difference in fast road and light track use and surely if the calliper is stiff enough to apply enough pressure on the pads to cause enough friction on the disc to lock the rotation of wheel when braking hard, then any repeat braking performance is down to the materials used in the pads and the way the discs dissipate the heat. Again in this regard what makes AP, brembo etc different to the cheaper brands when using the same sized discs and the same compound pads?