Why dont people sell big brake kits for all 4 wheels?

[rek916]

I'm in the market for a brake upgrade, and I was wondering, why do all these conpanies sell the big brake upgrades for usually the front wheels?

For guys like me who saved forever just to get to this point, it becomes a real pain not to be able to find a complete set (front & rear Z brakes, together).

Does anyone know where I could purchase a whole package w/o all the shopping around?

[drifter_for_life06]

you could jsut get some brembo's all the way around

to answer the question about why notall 4, i simply have one statemnt:

MOST not all but most of the stopping power is at the front end, hence the need for better and bigger FRONT brakes

[nsrZ32]

Yeah but there's just something strange about only having a big brake kit up front. Like I want the Endless setup for my Z but they don't make a rear kit. Stop Tech does, AP does, Brembo does. Just gotta shop around if you want matching ones I guess.

[drifter_for_life06]

yup, i think there is a company somewhere in Europe that started makin A. Martin, BMW, Porsche products, that sells a 4wheel big brake but i cant fidn the URL

[574-240sx]

Most people are just satified with upgrading the front brakes. Most of the time its a night and day difference for some people.

[golgo13b]

Did you look at heavy-throttle.com? It was either there or PDM. Anyway, my nephew explained to me that back wheels make car go, front wheels make car turn and stop. Everybody thinks he's really my son.

[hybrid_flyer]

70% of your braking comes from the front, if you want a full kit just order fronts and rears. Underground motorsports has a great brake kit available, with 300 calipers and supra rotors, they can send kits for both fron and rear. Cool thing is rears are a direct bolt on, but the front needs a bracket (which comes with the kit). They can also get you a parking brake from japan. Just remember when you upgrade the brakes u usually lose the parking brake.

[BomexS13]

Rotora has big brakes for all 4's.

[D1SR240]

i think another factory about big brake kits being mostly for the front is the cost factor. Companies make a bigger profit if they only sell the fronts becuase more people will buy them, as opposed if they had front and rears, because they would cost more and not everyone has that much money to spend on front and rears.

BTW:Silk Road makes a Rear Big Brake kit for the S13

[drifter_for_life06]

Did you look at heavy-throttle.com? It was either there or PDM. Anyway, my nephew explained to me that back wheels make car go, front wheels make car turn and stop. Everybody thinks he's really my son.

Only a RWD car does the rear wheels make the car go

On antoehr note i would just get Rotora or Brembo all the way around

[fantabulous]

stoptech makes them. 2 sets, require either 18's or 19's to fit though.

[hamsturbation]

it seems like most people dont care or think that upgrading only the front brakes can upset the brake balance.....

[drifter_for_life06]

regardless of balance, if im doing in excess fo 120mph my *** better be stopping real quick, all 4 big brakes is what i want

[rek916]

But ionno, it just seems kinda inconvienient to me- Say you're a guy like me, on a budget, and looking for a big brake upgrade from standard 4-lug.

Company offers you a conversion for the Front wheels, so what, your car is gonna have 5 lug/ big brakes in the front, and 4-lug/stock brakes in the back, unless you really shop around and hustle to get your stuff. Or if you're just 'big ballin', which most of us are not.

[hybrid_flyer]

But ionno, it just seems kinda inconvienient to me- Say you're a guy like me, on a budget, and looking for a big brake upgrade from standard 4-lug.

Company offers you a conversion for the Front wheels, so what, your car is gonna have 5 lug/ big brakes in the front, and 4-lug/stock brakes in the back, unless you really shop around and hustle to get your stuff. Or if you're just 'big ballin', which most of us are not.

Or you could just click on the Underground motorsports link on this site and pick up their Z32 kit for the front, and they drill the rotors for 4 luggers for free

[Hijacker]

if you're on a budget, why are you spending more money for a kit? Budget people should be checking eBay, junkyards, and comparing prices for all the small stuff. Want to know how I'm doing my brakes?

Calipers came from http://www.car-part.com I called around and found two yards willing to ship me calipers for $45 and $50. That's $95 for just the calipers. I bought SPL conversion lines for $45. Rotors came from heavy throttle for $171 (factoring in shipping). KVR pads and new pad hardware came from PDM. I think the grand total there was $95 with shipping.

Total Cost: $406

PDM's cost: $1125 plus shipping

I want to say Heavy Throttle's cost was $599, but their site's down.

Anyways, just because I could, I threw in a Z 17/16" brake master cylinder for $79 shipped off of eBay.

The rear brakes aren't as essential to upgrade. If you compare the contact patch of the rear Z brakes, it's no bigger than the S13's. The only difference is the extra piston on each caliper. Also, unsprung weight is drastically increased if you don't want to tackle the damper issue (Z dampers use a different mounting style than S chassis dampers). Also, the parking brake can be a PITA to do. Lastly, you'll have to get the rotor redrilled to 4 lug if you want to retain your wheels. And make sure you get the e brake shoes with the upright and assembly. They cost A LOT of money to replace.

[NSR_s30]

I'd get the Rotora ones.

[crzycav86]

The rear brakes aren't as essential to upgrade. If you compare the contact patch of the rear Z brakes, it's no bigger than the S13's. The only difference is the extra piston on each caliper. Also, unsprung weight is drastically increased if you don't want to tackle the damper issue (Z dampers use a different mounting style than S chassis dampers). Also, the parking brake can be a PITA to do. Lastly, you'll have to get the rotor redrilled to 4 lug if you want to retain your wheels. And make sure you get the e brake shoes with the upright and assembly. They cost A LOT of money to replace.

The contact patch may be less with the rear z-brakes, but the extra piston, greater leverage(these are 11.7 inch rotors), and greater heat dissipation more than make up for it. And IIRC, the rear z-caliper wasn't much heavier than the stock one.. the main difference was the weight of the new rotors.

I agree with you on the difficulty of implementing the z-upright and e-brake though... I still haven't had the energy to fix the e-brake.

[Nismo_Freak]

regardless of balance, if im doing in excess fo 120mph my *** better be stopping real quick, all 4 big brakes is what i want

You don't want huge rear brakes and this is the main problem with them.

When you deaccelerate faster (ie. more braking torque, assuming you have traction) the amount of weight shifted to the front tires increases. This unloads the rear wheels. If you have a large McNasty brake upgrade back there you will be doing nothing but locking up the rear brakes, and to get them to unlock you need to increase rear traction or lessen the braking torque. This requires you to lift off the brake pedal, which reduces your front braking torque.

That's why for a car like the 240SX that is inheriantly lighter than most of the cars listed above you don't have an equal rear bias from the factory. In fact that's one downside to the Z32 master cylinder upgrade is that you are changing your brake bias as well.

[cdlong]

that's what a prop valve is for.