What Brakes for E30 S50

[10/10ths]

Would you mind giving explanation as to how that would worsen with cross drilled? I would like to hear your theory.

I already posted my theory, read my entire post.

[Brian D]

This is fucking hilarious.

[bimerok]

If this was your theory then.....

As I said, your old, not needed technology is still used by top end manufacturers as Porsche, Ferrari, Lambo, Bugatti, etc...
Look at the size of Bugatti Vyron vent holes....

[cheades]

Stock brake setup on my car with track pads (Porterfield R4's) and ATE fluid has yet to let me down through a bunch of track days (ran both Hoosiers and RA-1's). The biggest thing I hear about drilled rotors is you want to atleast make sure you get them where the holes are CAST into them and not drilled as the drilling creates a stress point.

Make sure your stock cooling ducts are installed and you will be fine on stock stuff.

[10/10ths]

If this was your theory then.....

As I said, your old, not needed technology is still used by top end manufacturers as Porsche, Ferrari, Lambo, Bugatti, etc...
Look at the size of Bugatti Vyron vent holes....

For looks.

You can use them, I'm just saying they dont actually do anything for braking except wear pads a little sooner and eventually crack at the slots.

Using your example, why doesnt Ferrari use slotted rotors on thier Formula 1 RACE car?

[Massive Lee]

4 lug Massive Race kit. 11.75" x 1.25" and 4 pot Superlite forged calipers.
Save on wheels. Save on suspension conversion.

Rear kit with 11.75" x 1.25" rotors and 4 pot forged calipers available.

Front


Rear

[bimerok]

For looks.

You can use them, I'm just saying they dont actually do anything for braking except wear pads a little sooner and eventually crack at the slots.

Using your example, why doesnt Ferrari use slotted rotors on thier Formula 1 RACE car?

Dude,

There is no point to argue your absurd anymore.

You should’ve been a lead engineer for top manufacturers as they have no clue what they are doing.

[bimerok]

Lee,

Who makes these brakes? Where are they sold and how much?

[Farbin Kaiber]

Lee,

Who makes these brakes? Where are they sold and how much?

he does.

[Miasma]

Jesus people.

Some good info i found

Darrick Dong; Director of Motorsports at Performance Friction: "Anyone that tells you that drilling makes the disc run cooler is smoking crack."

Power Slot: "At one time the conventional wisdom in racing circles was to cross-drill brake rotors to aid cooling and eliminate the gas emitted by brake pads. However, today’s elite teams in open wheel, Indy and Trans Am racing are moving away from crack prone, cross-drilled brake rotors in favor of rotors modified with a fatigue resistant slotting process."

Stop Tech: "StopTech provides rotors slotted, drilled or plain. For most performance applications slotted is the preferred choice. Slotting helps wipe away debris from between the pad and rotor as well as increasing the "bite" characteristics of the pad. A drilled rotor provides the same type of benefit, but is more susceptible to cracking under severe usage. Many customers prefer the look of a drilled rotor and for street and occasional light duty track use they will work fine. For more severe applications, we recommend slotted rotors." (Note that even though Stop Tech sells both drilled and slotted rotors they do not recommend drilled rotors for severe applications.)

Wilwood: "Q: Why are some rotors drilled or slotted?
A: Rotors are drilled to reduce rotating weight, an issue near and dear to racers searching for ways to minimize unsprung weight. Drilling diminishes a rotor's durability and cooling capacity."

From Waren Gilliand: (Warren Gilliland is a well-known brake engineer in the racing industry and has more than 32 years experience in custom designing brake systems ...he became the main source for improving the brake systems on a variety of different race vehicles from midgets to Nascar Winston Cup cars.) "If you cross drill one of these vented rotors, you are creating a stress riser that will encourage the rotor to crack right through the hole. Many of the rotors available in the aftermarket are nothing more than inexpensive offshore manufactured stock replacement rotors, cross drilled to appeal to the performance market. They are not performance rotors and will have a corresponding high failure rate"

From Baer: "What are the benefits to Crossdrilling, Slotting, and Zinc-Washing my rotors?
In years past, crossdrilling and/or Slotting the rotor for racing purposes was beneficial by providing a way to expel the gasses created when the bonding agents employed to manufacture the pads...However, with today’s race pad technology, ‘outgassing’ is no longer much of a concern...Slotted surfaces are what Baer recommends for track only use. Slotted only rotors are offered as an option for any of Baer’s offerings."

Grassroots Motorsports: "Crossdrilling your rotors might look neat, but what is it really doing for you? Well, unless your car is using brake pads from the '40s and 50s, not a whole lot. Rotors were first drilled because early brake pad materials gave off gasses when heated to racing temperatures, a process known as "gassing out." ...It was an effective solution, but today's friction materials do not exhibit the some gassing out phenomenon as the early pads. Contrary to popular belief, they don't lower temperatures. (In fact, by removing weight from the rotor, they can actually cause temperatures to increase a little.) These holes create stress risers that allow the rotor to crack sooner, and make a mess of brake pads--sort of like a cheese grater rubbing against them at every stop. Want more evidence? Look at NASCAR or F1. You would think that if drilling holes in the rotor was the hot ticket, these teams would be doing it...Slotting rotors, on the other hand, might be a consideration if your sanctioning body allows for it. Cutting thin slots across the face of the rotor can actually help to clean the face of the brake pads over time, helping to reduce the glazing often found during high-speed use which can lower the coefficient of friction. While there may still be a small concern over creating stress risers in the face of the rotor, if the slots are shallow and cut properly, the trade-off appears to be worth the risk. (Have you looked at a NASCAR rotor lately?)

AP Racing: "Grooves improve 'cleaning' of the pad surfaces and result in a more consistent brake performance. Grooved discs have a longer life than cross-drilled discs."

also from AP: "Cross drilled...can compromise disc life. Radiused drilled...mainly used for aesthetic reasons on road applications."

...I'll keep looking for more. Note that these quotes are from people who are in the racing business, not the poser business.

Quoted from this thread, http://www.r3vlimited.com/board/showthread.php?t=96919

Learn a little about what your trying to preach first next time.
And that is Massive Lee's kit. LRN2TROLL

[Miasma]

Wow only my 3rd post. Hey everyone!

[Massive Lee]

Hi guys. I believe somebody posted, either on this forum, e30tech or s14.net a long list of quotes from chief-engineers working at the leading brake kit suppliers. They all mentionned that drilled rotors are a no-no for performance driving. Weither they are drilled or cast, holes will remove mass from the heat sink that a rotor is. They will also concentrate stress points. Drilled rotors are okay for a daily driver for its "oomph" factor with the ladies. But it is worth no more than chicken shit on the track.

Bimerok. if you have a daily driver, you don't need bigger brakes. Just make sure you run the OEM ATE calipers (not the Girling ones), that you have the right pad compound BOTH front and rear, that pads are not beyond 50% wear, and that the system is properly bled. Brake fluid will suck up the moisture in the air and its quality will change week to week. But if you run your car on a track and don't want to worry about your brakes, then it's a good thing to increase your braking power. Ireland makes a kit with sliding calipers. UUC makes a kit with smallish calipers (Dynalite) that are okay for most of us, and thin 21mm rotors. They will do the work as I also sale a similar kit. But if you want the ultimate race kit with extra stiff race calipers and thick 32mm rotors, then Massive has a kit for that purpose. Nothing can kill it. With the fall of the US currency expect to pay right under $1200 for a complete front kit. It used to be $1000usd. The Race kit is currently used by Club Racers in KP and I only have praises for it. It is not too expensive to buy and dirt cheap to run.

Just email me for a formal quote. Kits are in stock, and rear 11.75" x 1.25" kits are also available for the e30.

BTW Kovacs, a member on this forum, runs an e30 with Euro S52 and front Race kit on the track. I run a similar version of the kit on my e30 M3. And it works great.

[WillisE30]

I was about to say, I have drilled Zimmermans on my car, stock e30 brakes, and they work great. I purchased the drilled rotors STRICTLY for the look. They really don't offer any benefit over regular rotors as many others have said.

Also I was really concerned about my brakes prior to completing my own swap, however, now that I'm finished I don't think I'll bother doing any kind of extreme brake swaps. Looking at how well spec E30s perform with basically stock stuff helped me make that decision. Plus 99% of hard drivers on the street don't drive that hard, they just THINK that they do.

[StereoInstaller1]

Dude,

There is no point to argue your absurd anymore.

You should’ve been a lead engineer for top manufacturers as they have no clue what they are doing.

Apparently you are the clueless one.

The main job of an engineer is to make a car that SELLS.

If it does not SELL, no one has a JOB.

Thus, "Engineer" = "Sales Whore's Bitch", in the major leagues.

Slotted/drilled/fanboi crap sells, even to rich 50 year olds having a midlife crisis.

SO if the post explaining to you exactly what the leading thinking is these days, well, just quit while you are ahead.

Drilled is cheesy rice, unnerstand?

I was disappointed too.

Luke

[10/10ths]

Dude,

There is no point to argue your absurd anymore.

You should’ve been a lead engineer for top manufacturers as they have no clue what they are doing.

Is it ok for me to talk again?

I dont want to look absurd or anything.