a 6 piston front brake setup only or a 4 piston front and 2 piston rear like the stock brembo setup???

TIA for input

 

What is your goal, looks or real track performance?

 

fronts do 90% of your actual braking, which is why the rears really dont matter and thus arent normally packaged.

youve riden a bike, can you stop with the back tire?

 

i would say track performance, kinda like hitting 2 birds with a stone

i've never riden a bike b4, but bikes do have rear brake too rite?

 

You should check with DWNSHIFT from 350EVO. He campaigns a full blown 350Z race team. They use the stock Track model Brembo calipers by choice.

 

The fronts don't do 90% of the braking but they do a lot of the braking.

Jason

 

Wanted to add:

My quick math with real data and two assumptions reveals an 80/20 split between the front and rear brake forces. The two assumptions are:
- Max decel of 1.2G (which is accurate for a car on a set of R-compounds)
- CG height of 24" - This one is a bit of a random guess. If CG is lower the split would decrease (i.e. less braking done by the front axle) if CG is actually higher, the split would get worse (but I doubt CG is more than 2ft off the ground.

Caveat: The calculation I did is just the theoretical grip split between front and rear assuming equal size contact patches front and rear and constant Cf (i.e. Coefficient of friction is static regardless of load). So it's really a quick and easy FBD. However, the reality of these assumptions will throw off the math a little bit (front tires may be different size, but have less camber, Cf decreases with load).

Jason

 

Jason, i appreciate your view, thanks!

How about from experience viewpoint?

 

when I said bike, I meant bicycle like a pedal bike.

 

http://www.stoptech.com/technical/

Check the above. There is an excellent archive of technical articles on brakes and braking, and it will address a lot of what you should know, or want to know.

 

benzz280 - you should read the StopTech articles linked by Eagle1. Those guys do their homework.

However, I'll try to answer your question rather than go off on a random theoretical analysis this time!

The answer to your question is that the execution is more important than whether you have a 4 piston front 2 piston rear or 6 piston front only setup. What I mean is that either system could be designed very well and in a manner that matches the front and rear proportioning or either could be designed poorly and could hurt braking performance. What you're looking for is a company that has done the analysis and testing to match its front and rear bias (as I stated above the weight dist split is about 80/20 under max braking in a Z on grippy, even size tires). If the split is off, the car will get into ABS prematurely. I went with the StopTech 13" front only brake kit and did so because they have paid a lot of attention to brake bias and have matched the design to the existing rear brakes. However, even with this system, I am getting too much heat into the front rotors at the track (no fade, but rotors are stress cracking a little early). So my next step is to install brake cooling ducts. I believe that the simple 13" 4 piston front kit with a proper cooling kit is more than enough for the front of a 350z regardless of what you do with it on the track.

Now, the rear brakes seem to be doing ok from a temperature standpoint and I'm not chewing rotors. However, those stock (enthusiast model) rear pads are so tiny that even aggressive track pads are only good for about 300-400 track miles in my experience. So if you don't feel like using a new set of rear pads every weekend, it may be worth upgrading the rear brakes for that reason alone.

I'm driving on a grippier tire this year also, so maybe I'll reveal further limitiations of the rear brake system. If so, I'll let you guys know on this board.

Jason

 

hmm...after reading the website, a 6 piston up front only would not brake balance the car properly, which may cause the front to lock up early, so how come there are ppl selling just the front and not recommend a set for the rear too?

Jason, i would love a set of Stoptech, but they look so much $$ when compared to the 6 piston wilwood that is being sold here.