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So, if x-drill/slotted rotors were so great at fade resistance, why don't a lot of race cars use them!??!




(just so people reading this later don't automatically take me seriously)


Modified by Driven at 10:13 AM 10/22/2003

 

Well, first off, those aren't made of iron.

 

seriously, really dumbass comparison.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Driven &raquo;</TD></TR><TR><TD CLASS="quote">So, if x-drill/slotted rotors were so great at fade resistance, why don't a lot of race cars use them!??!</TD></TR></TABLE>

I think you just proved your point - they're not so great.

Some teams will use slotted rotors for very long endurance races, they say it helps keep the pads from glazing.

 

carbon brakes. big difference.
Rally cars use slotted rotors, and a surprising number of touring cars do too. I personally dont think they are worth anything for the HPDEr or club racer, but for some reason, whether it be marketing or not, many racecars do in fact use them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elgorey &raquo;</TD></TR><TR><TD CLASS="quote">carbon brakes. big difference.
Rally cars use slotted rotors, and a surprising number of touring cars do too.
</TD></TR></TABLE>

Touring cars also run on dubs, I find them a weak example to use when discussing what's right/wrong in racing.

 

I'd don't consider 17-18" wheels to be dubs if they serve a purpose, that being clearing much larger rotors and calipers.

 

They're overkill IMO, used mainly to attract the younger "bling" crowd. You can fit pretty damn big brake setup under 16s, 18s are just a whole new ballgame.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JMU1337 &raquo;</TD></TR><TR><TD CLASS="quote">Touring cars also run on dubs, I find them a weak example to use when discussing what's right/wrong in racing.</TD></TR></TABLE>
I didnt say it was right. The point was made that "real" racecars dont use slotted rotors, when many in fact do. Maybe you missed when I wrote "whether it be marketing or not"

And I personally find "what is right on hondas is right on everything" to be a narrow minded perspective. Many of those touring cars need big wheels to fit over big brakes. (another "not-needed" honda belief)

 

Sorry, didn't read your "marketing" thing. Read above though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JMU1337 &raquo;</TD></TR><TR><TD CLASS="quote">They're overkill IMO, used mainly to attract the younger "bling" crowd. You can fit pretty damn big brake setup under 16s, 18s are just a whole new ballgame.</TD></TR></TABLE>
so you have experience with a 3000+ lb racecar, on slicks? What may hold true for a lightweight honda may not hold true for other cars. Ask Gary Sheehan how well his fits-under-16" brakes performed on a racecar....
here is a hint



Modified by elgorey at 10:18 AM 10/22/2003

 

yeah, if you the sanctioning body you run with allows free range of gear ratio's and final drive, then i'd first find the largest brakes i could, then fit the smallest wheels that will fit over the brakes. more swept area is good

 

Don't forget, touring cars, and just about everyone else that uses slotted/cross drilled rotors in some sort of race series has a NEW set on for each race (or weekend depending on what types of cars we are talking about). Not a real good comparison considering most of us on here hold on to a set of rotors for a season... or maybe half a season.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">seriously, really dumbass comparison.</TD></TR></TABLE>

seriously, really ******* answer. I think it's great that you apparently had all of this knowledge downloaded into your brain as a fetus, put perhaps you should consider that not everybody is so brilliant.

When did this board become so ridiculously rude?

Matt


Modified by speedracer33 at 11:04 AM 10/22/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JMU1337 &raquo;</TD></TR><TR><TD CLASS="quote">They're overkill IMO, used mainly to attract the younger "bling" crowd. You can fit pretty damn big brake setup under 16s, 18s are just a whole new ballgame.</TD></TR></TABLE>


i dont think those interested in bling watch touring car races. and it has been said by teams in touring as well as in rally that (in rally for tarmac) they put the bigest brakes they can up front, then put a wheel on that fits over them.
as for crossdrilleds, do a swarch and ull find out why there not necessary anymore . slots i can see being usefull, esp for the heavier cars at longer races.

-spenc

 

Wow, i didn't think you all would take me seriously. HA!


I guess the joke is on me then. maybe i should add &lt;/sarcasm&gt; at the end. christ you guys need a sense of humour!

 

I didn't sense a bit of sarcasm at all in your original post.

 

i didn't either.

chris - who looks for , or , or some other similar marking usually.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by John &raquo;</TD></TR><TR><TD CLASS="quote">I'd don't consider 17-18" wheels to be dubs if they serve a purpose, that being clearing much larger rotors and calipers.</TD></TR></TABLE>

Dubs are 20 inch rims.
Lets say, for example, some stunna says "w3rd, those dub sixes are off the chizzle." That would be, "Damn! Those 26 inch rims are rad." So on and so forth.

Also, the original picture doesn't have a damn thing to do with BMW. Although PTG knows what is up, so do all the other race teams out there. Hell, I know whats up too, just give me $12k for ONE disk please!
Carbon disks are a whole new ballgame. The only slotting I have seen are the 3 slots that serve as wear indicators so rotor thickness can be checked with a glance.

As previously mentioned, slotting and/or drilling can serve certain purposes. What is NOT good is buying a drilled brembo rotor for Nopi.com, etc. These rotors are not cast with the holes in them, rather are drilled into a blank rotor which severely weakens the makeup of the rotor. Rotors like these will encounter hairline fracture around the holes. Now if you have an OEM Porsche or Ferrari rotor, for example, with holes in them I believe most (if not all) of them are casted with the holes.

And no, I didn't sense a damn bit of sarcasm in your original post, Tyson... how could anyone?

 

Someone should show this thread to Drew M. I miss that bastard. Anyone remember altimas.net?

 

Here is a picture of the PTG, BMW brakes, notice the rotor, Hehe!

 

Well from looking at the wheel in the above pic, I take it that is the car that is running in ALMS, and not Speed GT?

Well, either way, carbon disks are not allowed in Speed GT and im pretty sure are not allowed in GT (or is that GTS?)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by siisgood00 &raquo;</TD></TR><TR><TD CLASS="quote">Also, the original picture doesn't have a damn thing to do with BMW. ...

And no, I didn't sense a damn bit of sarcasm in your original post, Tyson... how could anyone?</TD></TR></TABLE>
this is where... that car has very few "BMW" parts... plus, there are plenty of race cars with x-drill/slotted rotors (plenty of USTCC cars have them)... porsche is notorious for it.


Like i said, joke is on me.

Remind me not to be sarcastic unless it's painfully obvious in this forum

 

Someone I respect in the HPDE universe suggested to me once that some cars use the drilled holes to reduce swept area. They would use a huge, thick rotor for thermal capacity while drilling the rotor to keep from "over-braking" the car. The idea was to have lots of iron inside the rotor, but less against which the pads would generate friction. I'm not sure it's really true, but it seems like a possibility.

Is this issue really so critical that it justifies an online jihad?

-Adam (looking for his carbide and DeWalt... heeeeeerrrre little brake rotor....)

 

Hello Siisgood00,

You are correct the picture I posted is from the ALMS GT BMW