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Brake Discs: Drilled, Slotted, Both, or Neither?
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Endless products are over priced.
I broke a set of front pads in half on my S13.
I preffer american made Carbon-Metalic pads.
My clutch guy who also does heavy industrial brakes (big rigs, work trucks, etc) has cut down truck brake pads to fit my S13 coupe, 300Z brakes (for the same S13 coupe, and my AE86.
I have broke the rear pads on the AE86 but that was under severe e-braking.
Max
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Originally posted by JunpoweRALso I dont know if any of you knew brake fade is also caused by the pad and rotor heating up to super hot tempatures so when ur braking it creates an air pocket between the rotor and the pads friction surface..with the fluid getting hot and what not but hope someone agrees and knows what im talking about..
So when you have either slotted or cross drilled rotors it helps the air to escape also during hard use but we all have our own opinions about braking systems..
I'll just stick to Slotted ones..
On the issue of cracking rotors, please also be aware that you can crack your rotors more easily than you might think. DO NOT PUT YOUR LUG NUTS ON WITH AN IMPACT GUN. If you let the local tire shop and their minimum wage employee put your lug nuts on with an impact gun at 250lb/ft you can expect cracked rotors sooner than later. For passenger cars you really only need about 85lb/ft on the lug nuts. Most cracks I've seen were the result of overtightening.
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ALso I dont know if any of you knew brake fade is also caused by the pad and rotor heating up to super hot tempatures so when ur braking it creates an air pocket between the rotor and the pads friction surface..with the fluid getting hot and what not but hope someone agrees and knows what im talking about..
So when you have either slotted or cross drilled rotors it helps the air to escape also during hard use but we all have our own opinions about braking systems..
I'll just stick to Slotted ones..
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Those are tight *Censored**Censored**Censored* rotors =)
I think my project car is looking at a set of 6 pot brakes front and 4 rear
($6500 KIT!!) yup but there slotted and vented..
check these out!!
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Originally posted by WhiskyI would advise against big brake kits. Higher torque isn't going to help you if you lock your fronts at 20 mph... If you must do a Z32 swap, do yourself a favor and swap everything, front, rear, and at the firewall.
Well-put about the Z32 swap as well. There have been entire threads documenting the exact forces and the disadvantages of front-only Z32 conversions on both Freshalloy.com and Zilvia.net.
Originally posted by mikesilI can't remember where i saw the test article, but they 'upgraded' the brakes on a car and found that the car had like 8 feet FARTHER stopping distance. sure better fade resistance, more clamping power, etc, etc, but what about when you need them to come to a full stop?
i agree that keeping a stock rotor size and going with better lines, fluids, and better pads are the best performance improvement.
Re: second paragraph- So JGTC cars shouldn't be running big brakes? Signal's time attack R34? Bigger brakes increase surface area. Increased surface area leads to better heat absorption and dissipation, not to mention increased pad friction area. Big brakes ARE important if the car is truly pressed.
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Originally posted by JunpoweRblah blah blah
There all good..
I personaly like the slotted ones..
less prone to cracking at the holes.
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blah blah blah
There all good..
I personaly like the slotted ones..
less prone to cracking at the holes.
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On my car I run Powerstop slotted rotors, Motul 600 fluid, Goodridge SS lines, and Porterfield R4-S pads, all stock sized parts. I have no fade and excellent pedal feel and control, the car brakes equally well at Willow Springs and Buttonwillow. Although I will agree about the Axxis pads, they do have the best cold bite I have found and they are fairly fade-resistant, they also wear absurdly quickly and covered my wheels in brown dust in a matter of a few miles. I have no such problems with the R4-S, but they do take one good stop to really bite well.
I would advise against big brake kits. Higher torque isn't going to help you if you lock your fronts at 20 mph.
Remember, if you put big huge calipers on the front, and the rears are still stock, you have a number of problems, none of which will help you get around a circuit faster. Your master cyl is now too small to properly control fluid pressure at the front pistons. Your bias is also way off now. Since you probably do not have a dual cyl brake setup with a bias-bar, you don't have any good way of adjusting bias. If you must do a Z32 swap, do yourself a favor and swap everything, front, rear, and at the firewall.
Another little pet-peeve I need to set straight... weight transfer is a function of weight, CG location, wheelbase, and track width. The vast majority of weight transfer occurs as a funtion of the leverage created by the difference in height between the CG and the opposite force acting on the tires at the ground level. As a result, the best way to decrease weight transfer is to lower the CG, and the only practical way to do that is to lower the car.
Stiffer springs do not substantially alter weight transfer, as only a small portion of weight transfer can be attributed to the x or y axis movement of the CG. Stiffer springs prevent body roll, and body roll is really only bad because it excessively deflects your suspension.
Ultimately, the tires accelerate, turn, and yes, stop the car. Not the engine, not the suspension, not the brakes.
I also agree that Carroll Smith's books are a must-have if you actually want to know something about racing and race cars.
Just my $.02
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but the pros of a better braking system outweighs (literally <8- ) the cons of a weak system.....but anwyays someone already said if you can lock your tires you should not have to upgrade your brakes right? tires can only handle so much. tires are the most efficient upgrade as we should all know.
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people fail to realize that bigger rotors mean more rotating mass, which equates to more power to move the wheels and more power to stop them.
I can't remember where i saw the test article, but they 'upgraded' the brakes on a car and found that the car had like 8 feet FARTHER stopping distance. sure better fade resistance, more clamping power, etc, etc, but what about when you need them to come to a full stop?
i agree that keeping a stock rotor size and going with better lines, fluids, and better pads are the best performance improvement.
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Random postings won't get you anywhere, bud.
WS6- An article on the Tire Rack's website is not proof.
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