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Slotted vs. Drilled

 
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Old 03-04-2009, 12:43 AM
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Slotted vs. Drilled

i was checking out new rotors for christine and of course scoped out the brembo section. For the fronts the slotted and drilled came out to the same price. so, any pros on drilled rotors compared to slotted?
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Old 03-04-2009, 01:06 AM
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Re: Slotted vs. Drilled

Drilled cracks.
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Old 03-04-2009, 01:40 AM
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Re: Slotted vs. Drilled

^^^ I've heard and read the same about drilled rotors cracking, that's why I went with slotted.
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Old 03-04-2009, 06:28 PM
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Re: Slotted vs. Drilled

I would think they would only crack if they were cheap.
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Old 03-04-2009, 06:43 PM
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Re: Slotted vs. Drilled

It's a risk I'd rather not take.
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Old 03-04-2009, 06:57 PM
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Re: Slotted vs. Drilled

that article from blaze really helps. forget the drilled, slotted for life!
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Old 03-04-2009, 09:09 PM
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Re: Slotted vs. Drilled

Yes, Drilled have had a tendancy to be weak under certain conditions. What you should look for is DIMPLED and slotted rotors. They don't have the weakness that drilleds can have. I think EBC makes some nice dimpled and slotted rotors.
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Old 03-04-2009, 09:25 PM
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Re: Slotted vs. Drilled

yea dimpled and slotted FTW!!!!!! thats what my dad has on his vette all teh way around and havent had a problem with them
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Old 03-04-2009, 09:37 PM
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Re: Slotted vs. Drilled

I have both...you guys are scaring me now. lol
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Old 03-04-2009, 09:38 PM
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Re: Slotted vs. Drilled

Nice i didnt realizy the drilled cracked damn one of my friends was going to get him done.
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Old 03-04-2009, 09:54 PM
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Re: Slotted vs. Drilled

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Originally Posted by runtingz View Post
I have both...you guys are scaring me now. lol
I say don't worry about it till yours cracks. Until then, just keep an eye on them rotors.
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cocaine is only a problem with the 4th gens tho, the long dash makes a great place to do a line.

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Old 03-04-2009, 09:58 PM
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Re: Slotted vs. Drilled

Sometimes the drilled is cracking...
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Old 03-04-2009, 10:11 PM
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Re: Slotted vs. Drilled

i heard from somewere that the brembo drilled rotors werent drilled but molded that way?
dont know if its true but if research wants to be done then go for it.
id go with slotted and avoid all risks though.
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Old 03-04-2009, 10:34 PM
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Re: Slotted vs. Drilled

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Originally Posted by pr0d1gy9 View Post
i heard from somewere that the brembo drilled rotors werent drilled but molded that way?
dont know if its true but if research wants to be done then go for it.
id go with slotted and avoid all risks though.
When it comes to stuff like Brembo, you don't really have to worry cause they really do their homework on every thing they produce.
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cocaine is only a problem with the 4th gens tho, the long dash makes a great place to do a line.

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Old 03-04-2009, 10:41 PM
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Re: Slotted vs. Drilled

if you get quality such as brembo you wont have any issues... its the idiots that get ebay knock offs that have problems then post on sites complaining. sry but drilled rotors cracking is BS as long as you pay to play. also the slotted ones will generally wear out your pads faster also. thats B.c they are made to cut into the pad more and vent gasses away

my 2 cents
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Old 03-04-2009, 10:58 PM
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Re: Slotted vs. Drilled

http://jdmultimate.com/Store/Product...&Model=PRELUDE
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cocaine is only a problem with the 4th gens tho, the long dash makes a great place to do a line.

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Old 03-04-2009, 11:33 PM
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Re: Slotted vs. Drilled

It's true. You gotta pay to play. Ive got fully Drilled rotors on my car and i do alot of hard braking with aggressive pads. No cracks at all, even after extremely rapid cooling due to rain. u cant settle for that garbage they sell off of ebay. Ap racing makes excellent quality big brake kits. Check em out...

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Old 03-04-2009, 11:45 PM
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Re: Slotted vs. Drilled

There are a lot of variables to it. As some have said a pos low grade cast brake that someone getting paid $.50 an hour to knock holes through a jig with no reguard for heat dissipation or even knows what heat treatment is MAY (synonymous with could, possibly, might, and potentially) crack. Now along the same lines a poorly vented rotor won't vent beyond the brake pad causing gas build up between the pad and rotor and thus, less braking ability. (Margianally, probably not measureable) same with cross drilled rotors that don't vent radially.

Both of these wear pads faster. And neither can be turned. Some good pads are (for most people) all you need.
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Old 03-04-2009, 11:46 PM
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Re: Slotted vs. Drilled

yeah id say go for slotted, ive heard drilled do crack more often, but it all depends on the quality.

i got drilled and slotted on my car, but the place i got mine has a lifetime warranty from cracking.
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Old 03-04-2009, 11:49 PM
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Re: Slotted vs. Drilled

i have hawk hps pads and brembo blanks and im very happy.
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Old 03-05-2009, 10:23 AM
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Re: Slotted vs. Drilled

i would stick to regular rotors, but if i could afford it. i would just get bigger rotors and calipers.
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Old 03-05-2009, 10:47 AM
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Re: Slotted vs. Drilled

Diameter is the biggest improvement you can make. The larger the rotor the better it will harness the inertia of the wheel and tire better. Same principle as using a longer wrench to break loose a bolt. More leverage.
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Old 03-05-2009, 11:19 AM
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Re: Slotted vs. Drilled

brembo cross drilled rotors are molded with the holes. i've never had one crack on the ones on my m3 for the 6 years i've had them. and believe me, i drive that thing hard. another thing: brembo does not make cross drilled and slotted rotors. if you see people (i.e. ebay) selling brembos that are both cross drilled and slotted, that should be a red flag to you.
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Old 03-05-2009, 01:57 PM
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Re: Slotted vs. Drilled

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Originally Posted by nevrdun View Post
Diameter is the biggest improvement you can make. The larger the rotor the better it will harness the inertia of the wheel and tire better. Same principle as using a longer wrench to break loose a bolt. More leverage.
larger rotors equal larger calipers though. maybe i'll hunt for some vtec calipers for a slight upgrade.
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Old 03-05-2009, 02:00 PM
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Re: Slotted vs. Drilled

i had brembo drilled and they cracked on me within six mths - the slotted ones make too much noise!
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Old 03-06-2009, 01:35 AM
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Re: Slotted vs. Drilled

the drilled rotors that are ACTUALLY drilled are prone to cracking since the drilling process creates stress concentrations in the rotor.
molding them with the holes in them (the way brembo does) are much stronger and do not create these concentrations.
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Old 03-08-2009, 04:06 AM
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Re: Slotted vs. Drilled

Cryo-frozen slotted rotors are the best. Powerslots are the baddest. ask prelude13 he's rockin a set that were going to be for my 3rd gen. he loves them. DBA are another option to resolve the heat issue without actually having to drill the rotors (my next set for the GTO) the general "discount" drill/slot rotors are brembos (if your lucky) and cnc'd. the drilling damages the integrity of the overall structure of the rotor and then heating and brake vibrations would gradually make the rotors do one of three things

1.warp
2.crack
3.break

cars that come with oem slotted/drilled rotors are made by brembo. Advice, get stainless steel brake lines, and DOT5 fluid and axxis deluxe or AEM pads.
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Old 03-08-2009, 02:45 PM
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Re: Slotted vs. Drilled

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Originally Posted by 94ludeguy View Post
also the slotted ones will generally wear out your pads faster also. thats B.c they are made to cut into the pad more and vent gasses away
Brake pads don't generally out gas until you've reached the thermal limits of the pad. During normal usage, there is no out gassing. If out gassing occurred during normal usage, you would likely have issues with a solid rotor!

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Originally Posted by ~SpiritCrusher~ View Post
Ap racing makes excellent quality big brake kits. Check em out.
Very true, if you don't mind spending close to $4k for a brake kit and $200 to $400 for a replacement rotor. :) I really like Alcon's products, but $1,500 for a good caliper is a bit steep for me. I've had very good luck with Wilwood, but the new setup I'm trying out uses rotors that run $185 each. :(

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Originally Posted by nevrdun View Post
Now along the same lines a poorly vented rotor won't vent beyond the brake pad causing gas build up between the pad and rotor and thus, less braking ability. (Margianally, probably not measureable) same with cross drilled rotors that don't vent radially.
What do you mean by a poorly vented rotor?

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Advice, get stainless steel brake lines, and DOT5 fluid and axxis deluxe or AEM pads.
DOT5, really? Are you sure?
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Old 03-08-2009, 03:11 PM
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Re: Slotted vs. Drilled

One in which the flutes in the rotor don't vent beyond the contact of the pad. Thus, venting no gas away. I'm not saying that any of these thing have an effect on day to day driving that anyone could notice. Judging from your sig I'm going out on a limb and saying you use brakes harder than most. For a daily, spitired driver I can't see needing more barking than what the car comes equipped with.
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Old 03-08-2009, 04:58 PM
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Re: Slotted vs. Drilled

I say brembo blanks and save your money to do a legend dual piston conversion.

and i have never heard of our cars running dot 5 fluid. our cars weren't designed for it. I could be wrong...
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