Directfreak

iTrader: (2)

Allright. I have made up my mind. I want to get some:
crossdrilled rotors or
crossdrilled and slotted rotors (haven't found these.)

I want to know where you got them, what price,
and how how happy you are with them.

I already have Hawk Racing Pads and Stainless Steel brake lines. I will replace the fluid in the line when I change the rotors and re-bleed the system with racing fluid.

So Far, using the search function, I have found the following:

Mazdatrix at $170.89 per rotor
NOPI Power Slots at $141.04 each
Mariah Motorsports KVR Performance Slotted at $215 (a pair)
Pure Performance (KVR Performance)@ $215 a set with crossdrilling and cadmium plating

I know the stock brakes are fine, but I want to go the best I can without going Wildwoods or Brembos.

Anybody have other recommendations? Prices? Locations?

MIKE-P-28

iTrader: (1)

you just want your sig longer than mine , just admit it man

Directfreak

iTrader: (2)

You got me...

851stgen12a

I dont know any other places to purches some rotors. But what I do know is I ordered the x-drilled rotors from Mariahmotorsports 3 weeks ago and havent seen them et. So I called em this morning and they informed me that they were still in canada and would take at least 4 days to get to Cali. And another week or so for them to get to me. This deffinetly the last time I buy from Mariah!! There goes my track day this weekend..

jr69187

here look at this and see if it works for you
http://www.precisionbrakescompany.co...geo_mazda.html
http:///brakerotors.html
jr
still looking for a better price

Manntis

Have you tried Stoptech?

Directfreak

iTrader: (2)

http://www.brakerotors.com/

Sure did.. Mo'Money, Mo'Money, Mo'Money!

Manntis

nerts.

joelwahid

rx7.com has Bonez x drilled rotors, and bonez slotted rotors. check em out.

rx7passion

any reason you want cross drilled rotors? all my vast knowledge supposedly it didnt really do much and was just for looks, actually promoting cracking. vented and slotted was what all the racers ive talked to told me to get. btw i have heard nothing but good things about kvr rotors.

Manntis

Just draw some black dots on your rotors with a Sharpie when you park...

MIKE-P-28

iTrader: (1)

LOL

Directfreak

iTrader: (2)

There you go.. a simple and affordable solution.

Kill No Cone

iTrader: (6)

It only works when you’re parked, and you look stupid drawing them in again.

RACavanaugh

Check this out....


http://www.autospecialty.com/main.htm


Hope this helps!

Ron

MyRxBad

KVR out of Ottawa, Ont Canada sells crossed drilled rotors. I don't know if they have a website.

851stgen12a

Yea Kvr has a Website. they are like $135 USD for the front rotors. Im not sure if there each or for the pair. If you wait ill tell you what I think about the rotors. Have an auto-x next saturday and a track day next Sun. (Busy Weekend)

Dyre

All you are doing is spending more money to decrease your brake performance while you decrease pad and rotor life-

bLiNG bLiNG y0!!

Manntis

drilled rotors are great for high-po applications (which is why MacLarens and Ferraris have them) and they look great, but for the cost/benefit for street driving the benefits are negligable to detrimental.

That said, they look great especially in open rims. If cost weren't such an issue I'd have 'em myself.

Dyre

Why are they so great? Becuase the reduce mass and DECREASE surface area while greatly increasing cracking on a rotor??? Sure sounds like a good deal to me.

The veins on between the faces of the rotor are there to increase the surfac area, and are where 90% of the heat is radiated away from the rotor. The rotor faces are there to contact that pad and convert energy (movement) into heat. The purpose is two fold. Create massive amounts of friction with the pads, and move and store the heat away from the pads to keep the pad material from overheating.

Once those two conditions are meet, then you can think about reducing rotating mass via casting holes into the rotor. Rotors that have trully been drilled are beyond stupid. Your just asking for catastrophic brake falure. The ONLY reason to 'crossdrill' rotors is to reduce unsprung, rotating mass. Thats it. In the 70's it helped vent gasses created under extreme heat with asbestos pads, but modern pads don't gas out anymore. Sloting is usefull in rally aplications where the pads get excessivly dirty, and the slots help to scrape and clean the pads. Both setups cuase the pads to where out much faster.

McLarens, lambos, and porches have them soley for bling factor.

Directfreak

iTrader: (2)

Bling-Bling for me..

Manntis

reduced mass is a good thing, especially unsprung weight like brake rotors

true

Under extreme prolongued braking, this sometimes happens. Very extreme.


Huh?

heat is radiated from any surface contacting air; this is why GSL-SE brakes are vented, increasing the surface area of the brakes exposed to air.

yup

Nope. Surface area does that, not neccessarily rotor faces. Crossdrilled rotors actually have greater surface area because they expose the metal ******* the drill hole.

In addition, cross-drilling helps to prevent warping, similar to the frost-holes in the floor of your car.

Metal expands when heated, and dramatically so with brakes. They go from being in a cool airsteam to friction-generated temperatures in the hundreds of degrees in a fraction of a second.

If the metal is a solid slab, it can warp. as central areas push on outer areas. Metal with holes in it, however, tend to expand more evenly as central areas are allowed pressure relief via expanding into the holes.

This dimensional stability issue is true of virtually any material, to varying degrees. Bridges have expansion joints running across them (that steady thump......thump.....thump you hear driving over a span) so constant heating/cooling can be relieved without cracking or warping the surface.

It's not all about mass, but quick and even cooling. Warped brakes lose races, and brake failure due to heating/fading kill street drivers pushing their solid brakes too hard.

Phone up CART racers or any modern exotic car manufacturer. Count the chuckles before they hang up on you.

It can happen, but only under extreme conditions. Cars that often face these extreme conditions often have carbon fibre brakes. Cross drilled, I might add.

Nope. See above.

Yup. And cool faster.

The bling factor doesn't hurt, but do you seriously think high-po exotics would create safety devices with "catastrophic failure" as inherently certain as you claim?

Not for marketing in litigation happy USA, the prime market for all such cars you listed..

rx7passion

damn manntis i couldnt even read all of which you quoted and wrote but DAMN thats alot of quoting, how long did that post take you?

Manntis

not long @ all Cut & paste is your friend

jeremy

iTrader: (1)

damn manntis hit that on the head. it is a cooling aid and generally not needed. i have only encountered brake fade once on the street and that was pushing my 91 camry on a backroad rallying for 15 minutes straight. you won't want slotted as averytime the **** passes the pad it shaves a bit off to keep fresh pad surface. that will grow expensive. i'd say go with the magic marker technique.