question:s13 Brake upgrade with 4piston caliper

[typex240]

Hi, I am thinking of upgrading my s13 brakes with either300zx or some skyline 4piston calipers. I see many of you have done the front ones, but I didnt get to see the rear one some how.

I would like to know if the rear upgrade is possible without huge modification or it is not worth of money to get done.

If it works, please let me konw how it works.Thanks

[Chingon]

Not many ppl deem it worth the money, but it can be done. It's a pain in the ***, and even greater pain in the *** to get the e-brake working. you must remove the knuckle and hub to dissasemble the original drum+disc assembly. This pretty much involves bolting appart all suspension arms from the knuckle.

Like I said, most ppl w/the setup are happy w/o an ebrake and just transmission brake in the inclines. however, do a google search for importnut 300zx and he has a brake writeup of both front and back w/a working e-brake.

[typex240]

Thanks!!

[navysnail]

sport compact car did the e brake. see if they have any hints.

[gyfer]

typex240... you sure you want both front and rear have same brake power ?

Before we began:" Regardless of your huge rotor diameter, brake pedal ratio, magic brake pad material, or number of pistons in your calipers, your maximum deceleration is limited every time by the tire to road interface. " Which mean, no matter how much bigger or better your brakes are, your breaking capability are limited to your tires contact with the road before your wheels locked up and turn into little piles of molten rubber. Brake power x Tires grip = decerelation

ok, now picture this.In an emergency stop, you slammed your brake. Your car weight distribution goes from 50/50 ( ideally) to 65/35. Which mean your front wheel has much bigger contact surface compare to the rear.The contact surface increase = coefficient of friction of the tire increase too. Since you upgraded your front wheel brake, you are capable to stop better. Brake power x Tires grip = deceleration

But since you upgraded your rear wheel too, you rear wheel going to lock up before you rear wheel does. ( is either front or rear). And this going to cause you to lose the traction on the rear, which kinda like you are pulling your e-brake... if you are not travelling on a straight road, you are going to spin...

My recommendation. Replace your rear caliper with your front one, if you are going to upgrade your front to Z32 brake system.

[Chingon]

A cool post but I'm guesing he meant the rear 300zx calipers.

[navysnail]

ya, like gyfer said, it will throw the balance off. you would have to do the entire z32 system, including the master. bigger brakes really only help with overheating anyway because any stock system is capable of outbraking the tires, unless your running r compound or something.

[typex240]

Thanks for the info guys!! Hmm...but I am still comfusing lil bit. As what gyfer is saying, it doesnt necessary to get the rear z32 caliper. It seems like better idea. I am thinking of just getting the front one done like other ppl. Is this better idea?? But 240kid, r u saying I should get front and rear both??

[fuzion]

I thought I had read somewhere the Z32 MC will help give a firmer pedal feel, but they are both capable of balancing the system ok, ie z32 up front, s13 in the back.. I thought I read somewhere it will balance out ok.....................................................................................................................................com.org.net