I was talking to the owner of another website and he says he will cut me a great deal on the big brake kit by brembo for the front of my 8.
First, does anyone have them and if so, do you like them....
2nd- is $2000 too much too pay for the kit.
ive researched it a little but want to hear from you guys. he had the one left and i would like to have it if i can come up with the cash in the next few days..... should i buy it or not?

thanks

 

Theres no need unless you race on a track all day long. They won't make the car stop faster, just prevent fading under heavy use. Waste of money.

 

I dont know if you ever had any big break kits on any of your cars.... If you think the break kits are not gonna make the car stops faster!!!

I'm using AP Racing 4-pot with 355mm break kit... works like a dream!

 

Think about this for a second...

If I stomp on the stock brakes I could lock them up (without ABS) and make the wheels stop spinning. How would bigger brakes help? You would lock your wheels up faster? I think not.

They help with the feel of the brakes and less fading when used excessivley.

 

Upgrading your brakes doesn't just increase feel and reduce brake fade, they will also stop you faster. How fast you lock up your brakes has nothing to do with it, the brembos will have more stopping force before locking up than the stockers which will slow you down faster. Is this necessary for street use? No, but the stock calipers look horrible, especially if you have aftermarket rims that are more open so they increase the aesthetics fo the vehicle, and more braking power never hurts.

 

this car already stops on a dime and you can always paint the stock calipers if you don't like them. noob is right though. if you spend a lot of time at the track, go for it. if not, that money can be spent better elsewhere. if you're made of money, you go boy!

 

Please explain. The limiting factor is the interface between the TIRES and the road, not the brake pad to rotor. If the stock brakes are capable of locking up the tires, ie exceeding the static friction limits of the tire/road interface, then how are bigger brake calipers creating higher static friction limits between the tire/road interface?

The ultimate braking force is controlled by the tires, provided that the brakes can provide enough force to lock the tires. Shorter braking distances come from getting the maximum force from available from EACH tire, or from getting stickier tires. Bigger brakes improve feel (if designed properly) and reduce face, but can NOT magically create more stopping force from the tires than the stock brakes could.

In fact, independent testing by magazines like Car and Driver has often shown that aftermarket big brake kits increase stopping distances compared to stock brakes. There are several reasons for this - putting big brakes on the front only screws up the brake balance, so that maximum force braking isn't keeping EACH tire (ie front AND rear tires) at the maximum deceleration; and often big brake kits screw up the ABS calibration, so they are not capable of getting all the tires to the maximum deceleration.

The stock RX-8 brakes are extremely good - in terms of stopping distances, they are only beaten by a handful of exotic cars. I'd love to see some hard proof that any big brake kits can stop as well as the stock brakes, much less shorter!

Regards,
Gordon

 

even though the road/tire friction is the limiting factor, technically wouldnt that point be reached faster with a BBK than without?

 

You also have to remember...at no point is the clamping force actually increasing. The clamping force is determined by the master cylinder...not the caliper. Having a multi-pot caliper just "distributes the force" more evenly. Aka if you went from a 2 pot, to 4 pot, your now distributing the same force over 4 pistons instead of 2...you didn't double the force, your just distributing it more evenly. This changes the feel of braking, as well as slightly increasing the effectiveness of the pad on the rotor...though these effects have diminshing returns. Though a 4 pot might feel alot different then a 1 pot... a 6 or 8 pot will feel almost no different from a 4 pot.

Larger brake kits also have a similar effect to larger rims...they negatively effect unsprung weight and rotational mass. Though aftermarket calipers are usually lighter then stock ones, the increase in diameter of the rotor increases the effect of its rotational mass, which counter acts any weight loss obtained.

If you ask me, the 8's already got oversized brakes for its application, which is why they are utterly fantastic. The car's what...2950 lbs? And its got 13 inch front rotors? Thats rediculous. Heck you can even fit 17's over them...just perfect.

Want to stop faster? Get some forged 17x8 or 17x9 rims, and put on some Toyo RA-1's...you'll stop so fast you'll get whiplash.

 

2000 too much for the kit...well yes considering tha tmazdarix sells the brembo kit for 1295...i'd say you were getting ripped off if that is the discounted price:p. if you want them then get them..it won't help you stop faster...it'll just help with break fade around a track...so if you don't track your 8 it' srelly just for looks...i'd get the mazdaspeed kit (well some of it it's hella exspensive) for the looks. just my 0.02 though:D

 

Ive found this same kit at 2 other places for over 2500, and one of those places was one of the vendors here. Are we sure we are talking boutthe same kit?

Now you all got me thinking about them again and if he still has them, maybe i can perform our before and after tests. All i need is a big loot that i can give my car hell in without anyone caring

 

i have no idea if it's the same kit since i've only seen one kit by brembo for the 8 (granted i haven't looked for them)...so you tell me here is the one i was talking about. hope this helps http://mazdatrix.com/8brakes2.htm enjoy:D

 

The kit you are talking about, that costs 2400 is the Gran turismo brembo kit.

DO NOT BUY IT. I have it and a weird noise coming from the brakes. Had to put the stock brakes in the car again. Now they are sitting at my house because brembo offers no warranty on them (EVEN IF THEY ARE 2,400 USD)

DO NOT BUY THEM! That is my advice. If you still want them i sell you mines for 1200. They have like 2K miles on them.

 

The mazda trix kit does not come with rotors. It is only calipers.

That is why it cost only half of what the full kit cost.

 

^^ hmm and rotors cost 1200? come on we arent talking about f1 stuff here...you can get rotora rotors for like under 500.....if your calipers are the same as these with out rotors...then that's a waste of money....i'm guessing the 2400 one is a higher big brake kit they make. (the one on mazda trix works with the stock rotors...so it's just a 4-pot caliper..not any bigger). waht size does yoru calipers fit? 355mm or somethign liek that i'm guessing. this woudl help you stop faster...teh mazdatrix brembo kit just clamps down on the rotor more evenly and helps with brake fad (i think).

 

Yep. my rotors are 332 mm and the caliper is huge. Here is a pic BUT DO NOT BUY THEM unless you want to punish yourself for a wrong action u did lately! :D

 

what dont you like about them?