Brembo Caliper on stock rotor

[roastbeef]

i'm sorry to say, but you guys both got hosed on these brake kits. rears fit like crap... the damn pistons are on the edge of the rotor. i'll bet you'll see some really weird pad wear.
then there are those weird metal... things that appear to be affixed to the brake pads. it looks like they are trying to use longer pads that aren't as wide, so they attached some huge metal guides to keep the pads centered on the pad retainers. this is some mikey mouse shit guys... sorry, send it back.

[roastbeef]

Originally Posted by martymil

You cant adjust these unless you machine the calliper internal area and totally reengineer the pad, it would be pointless as by bringing the pad further to the inner edge of the discs would decrease the performance substantially.

Its harder to stop the inner edge of the disc than the outer edge

You want the pads centered on the rotor, and the pistons centered on the pads. Proper pad pressure is important. So important that manufacturers of serious calipers taper piston sizes to counteract the first piston having a bias.

[dj_dub]

Originally Posted by roastbeef

i'm sorry to say, but you guys both got hosed on these brake kits. rears fit like crap... the damn pistons are on the edge of the rotor. i'll bet you'll see some really weird pad wear.
then there are those weird metal... things that appear to be affixed to the brake pads. it looks like they are trying to use longer pads that aren't as wide, so they attached some huge metal guides to keep the pads centered on the pad retainers. this is some mikey mouse shit guys... sorry, send it back.

You might be right bro...but I've been running this setup since September and everything has worked fine. No weird uneven pad wear and the setup worked good at Laguna even in the wet. I do agree that the pistons are not 100% centered to the rotor as they should be...but I do know for a fact mine sit closer than the other guy's does.

I'm going to buy some Carbotech XP20s soon before I go to Thunderhill in a month or so...we'll see how they fit on this Mickey Mouse setup and I'll report back. haha

[martymil]

I can't comment yet on this as mine only has been fitted for a day but it already feels and
stops far better than the shitty stock callipers

Once the break in period finishes I'll do some vbox testing to see how much better it is

Maybe the pad location is not ideal but the car is front biased from factory and doing some
reasearch I can't find out how much

At this stage I'm not really worried about it, if it effects braking performance I will address it

Not hosed by any means, not ideal but way better than stock

[Powashiftin]

2006-2010 Jeep SRT8 utilizes 360x32 front and 350x28 rear rotors with brembo 4 piston calipers. These rotors are similar in size to the e9x M3 rotors. The price point on these brembo calipers are around $700. When I said the price point needs to be 50% less, this is what I meant. I'm not saying this is a better fit than the Lamborghini brembo's, but if someone created a retrofit including brackets, lines, and pads with calipers for around $1,000, they would make a lot of money...

[martymil]

the problem with srt8 callipers they are not radial mounted so making brackets for them
would be easy but nowhere as rigid as radially mounted callipers

The brackets would be thin and flimsy and those callipers are a lot heavier than radially mounted ones

But it would be cheap

[martymil]

Ok so after a bit of research I figured out where the rear callipers come from, its from a 2010 Porsche boxster and the front as we already know come from a Audi R8/Gallardo

There is a large range of pads to choose from so sourcing replacements will be cheap



.

[Powashiftin]

Originally Posted by martymil

Ok so after a bit of research I figured out where the rear callipers come from, its from a 2010 Porsche boxster and the front as we already know come from a Audi R8/Gallardo

There is a large range of pads to choose from so sourcing replacements will be cheap



.

Porche boxster front or rear caliper?

[roastbeef]

Originally Posted by dj_dub

You might be right bro...but I've been running this setup since September and everything has worked fine. No weird uneven pad wear and the setup worked good at Laguna even in the wet. I do agree that the pistons are not 100% centered to the rotor as they should be...but I do know for a fact mine sit closer than the other guy's does.

I'm going to buy some Carbotech XP20s soon before I go to Thunderhill in a month or so...we'll see how they fit on this Mickey Mouse setup and I'll report back. haha

Originally Posted by martymil

I can't comment yet on this as mine only has been fitted for a day but it already feels and
stops far better than the shitty stock callipers

Once the break in period finishes I'll do some vbox testing to see how much better it is

Maybe the pad location is not ideal but the car is front biased from factory and doing some
reasearch I can't find out how much

At this stage I'm not really worried about it, if it effects braking performance I will address it

Not hosed by any means, not ideal but way better than stock

i've been told that the brake bias in these cars is somewhere around 80%. i hope you two don't see any weird pad wear from the rear, but doing about 20% of the work, even at the track, it might not be obvious right away. i could be completely wrong and it will be fine.

there is no such thing as pads being positioned on the outside of the rotor for optimum ability. if someone told you this, its nonsense. optimal efficiency is the pad covering the entire rotor face +/- a few MM (centered), with the pistons centered on the pads. a rotor is going to turn friction into heat the highest efficiency when the pad is putting heat into the entire rotor face. this is simply a fact.

there is definitely something different about each of your kits, whether it be pad sizes used, or caliper mounting brackets. either way, i think its bullshit the seller is basically using you guys as test subjects at a premium price point. that last part is just my opinion.

[martymil]

Originally Posted by Powashiftin

Porche boxster front or rear caliper?

Rear

Originally Posted by roastbeef

i've been told that the brake bias in these cars is somewhere around 80%. i hope you two don't see any weird pad wear from the rear, but doing about 20% of the work, even at the track, it might not be obvious right away. i could be completely wrong and it will be fine.

there is no such thing as pads being positioned on the outside of the rotor for optimum ability. if someone told you this, its nonsense. optimal efficiency is the pad covering the entire rotor face +/- a few MM (centered), with the pistons centered on the pads. a rotor is going to turn friction into heat the highest efficiency when the pad is putting heat into the entire rotor face. this is simply a fact.

there is definitely something different about each of your kits, whether it be pad sizes used, or caliper mounting brackets. either way, i think its bullshit the seller is basically using you guys as test subjects at a premium price point. that last part is just my opinion.

Since the other guy is tracking more than I will be, he can comment on this.

I wouldn't say its a premium price tag 1300 dollars for the rear, you could always use a stock calliper as its an overkill on the rear anyway

But I do know what you guys are trying to say, its should be in the centre for racing for optimal heat displacement, not really needed for street use and since the rear is only doing 20% of the work it will be ok for light track duties.

[Powashiftin]

To those who were hammering me for saying price point should be 50% less, do you think $1300 is a good price for the porche boxster calipers package?

No! Ripoff.

[aus]

How much are Stoptech's ST60/40 kits selling for now?
I got mine for $4,500 shipped but that was a few years ago.
There's also Sparta and WP Racing available now too.
.

[martymil]

6k + shipping and taxes

[kamber]

ST60/ST40 kits regularly go for ~$3500 second hand, with less than 5k miles on the set. I think they're a decent value at that price point. I managed to snag a set of ST60/40 trophies for a steal at $2k + shipping, granted they did not come with pads. I find it hilarious that people pay $6K for even ST Trophies when new, considering how many other better options there are out there in that price bracket (granted, it's arguable, but I'd much rather drop $6k on a Sparta, AP, Essex AP, or PFC kit).

[martymil]

For you guys buying sec hand is worth it

I've been burned twice now buying stuff out of the US and it took me months to get my money back, its just not worth it unless the seller is an honest bloke and has lots of rep

The shipping out of the US is almost twice the price of that out of Europe

It really makes it uneconomical to buy stuff sec hand from you guys

[martymil]

BTW made a mistake its not off the Boxster, going of the part number of the rear pad they are from a Porsche Cayenne

http://www.hawkperformance.com/perfo.../hb502f606-170

[nycplumber]

The cayenne swap is common in the vw world. If I remember correctly the front caliper is roughly $600

[r0cketm0nkey]

Damn. Those pics are scary. I knew something was amiss when they had to send "special instructions" for the rears. I'm absolutely OCD, and a fit like that, brake bias be damned, would compel me to back my car into a wall in the hopes that the force would push the caliper back into place. Really want to know what the seller would say about this.

[martymil]

I'm actually on it waiting to see what happens next

[martymil]

To stop the Brake bias argument I worked it out for you guys and here are the results using this calculator

http://www.tceperformanceproducts.com/bias-calculator/

S is stock
B is Brembo

As you can see the bias is shifted towards the front ever so slightly using this kit and not as much as you guys are speculating

Everything is taken into account brake pads, piston sizes, rotor diameters

You can also change the bias with the brake pads you use

I rather have this setup and have a choice of different brake pads and rotors than being locked in to one manufacturer

I'm also waiting on Albert to respond on the rear brake pad size or location ?

[My Schnell]

So, the leg pressure stays the same but you get less rotor torque at the wheels...both front and rear? If I am reading this correctly...

[martymil]

Yes, the calculator is there and if you want to know how its all worked out follow the link.