Are drilled and slotted rotors worth buying? WRX2003

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Nov 16, 2003 | 07:26 PM

WRX1138

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Are drilled and slotted rotors worth buying? WRX2003

I've had some performance modifications with power and now I'm looking for some stopping power. I'm still running on the WRX's stock sixteens and I'm waiting a while to get some Volk rims since they cost a fortune. I was wondering if anyone who had bought the Drilled and Slotted Rotors would recomend them. I know they enhance breaking and keep the brakes from overheating but I would like to know if it is really worth the $250 to get them. Any comments would be appreciated.

Nov 16, 2003 | 09:32 PM

Akiata

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Just buying slotted or drilled rotors alone will not do anything for your braking. Unless you NEED or want the bling factor of a big brake kit just by replacing the brake pads, stainless steel brake lines and using good fluid will make your car stop and feel much better.

Nov 16, 2003 | 10:33 PM

Uncle Scotty

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Drilled rotors are more prone to cracking, drilled and slotted are more prone, yet. Most drilled rotors are NOT recommended for the track.
I have slotted, front and back, and that is one of the small bits of bling I allow myself for my car...subtle.

Dec 14, 2003 | 08:05 PM

EJ20T

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what is the difference between drilled and slotted?....

.....whats better?

Dec 15, 2003 | 04:29 AM

Wingless Wonder

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Quote:

Origami posted by EJ20T
what is the difference between drilled and slotted?....

Pic shows slotted rotor in background, drilled and slotted rotor in foreground.

Quote:

Origami posted by EJ20T
.....whats better?

I think others have already answered your question but here's a FAQ on StopTech's site. They also address your question about slotted and drilled brake rotors.

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Dec 15, 2003 | 10:45 AM

InfamousDX

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If you really want stopping power, unless you go AutoX or track racing, pads, lines and fluid are all you'll need.

Dec 15, 2003 | 09:32 PM

hashiriya

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Good lines make a BIG difference. People have all kinds of different opinions on who makes the best pads, personally I am a fan of either Endless or Project Mu.

But yeah, drilled rotors can crack.

Dec 19, 2003 | 02:20 AM

1fastGC

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go w/ slotted if you do a lot of track events and autox. but like someone mentioned, pads and lines are all you need really.

Dec 19, 2003 | 04:22 PM

mmboost

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I also said this in the follow thread:

https://www.i-club.com/forums/showth...threadid=40867

Quote:

FYI - there are studies that claim slotted/drilled are a waste of money. My personal take is its not as big a benefit as many believe. Its quite the visual modification so lots of people will do it first over say putting in SS lines. For me, slotted/drilled rotors would be the last thing I do. I believe it ups efficiency (in terms of heat dispersion) but not to a degree that matches the cost of new rotors. Were I to change rotors, it would be for strength and durability."

So I agree with 1fastGC. You'd want strength and durability at track events. Sav yer $.

jason

Dec 19, 2003 | 07:09 PM

#10

EtchyLives

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When it comes to brake fade on my wagon, I noticed a nice improvement from one track day to the next by adding slotted rotors. I got the DBA's. The driving force behind this was that I'd scored my rotors at the previous track day and needed new ones anyway, but the slotted ones were a definite improvement over stock.

Dec 19, 2003 | 08:33 PM

#11

Wingless Wonder

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Car Info: 02 Impreza WRX sedan

Sti Brembo and DBA rotors are vented differently than the stock WRX rotors, IIRC. Conventional rotors use cast vanes to channel air flow through the rotors, whereas the DBA and Brembo rotors use a segmented vane design (DBA calls it 'kangaroo paw') which is supposed to help out a bit more in the cooling department. Every little bit helps, I suppose.

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"…axles of evil…" - george w. bush

Dec 22, 2003 | 07:46 AM

#12

redrex

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To help improve braking on my rex, I took this route:
-changed the brake fluid (Motul RBF 600)
-changed the lines (steel braided lines)
-changed the front pads
-changed the rotors (DBA slotted)

Big difference in pedal feel and braking overall. With all that power the WRX is capable of (not to mention the weight of the car), upgrading the brakes should be on top of your list. Out of all four components of the upgrade I did, IMO the lines, brake fluid and pads were the most effective. Don't get me wrong, the slotted rotors are great, but if you only had $300, get the lines, fluid and pads first.

Dec 30, 2003 | 07:57 AM

#13

t-wrexxx

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AEM makes replacement rotors for the WRX and they are drilled. So they are really worthless without doing pads/fluid/lines first?

Dec 30, 2003 | 08:34 AM

#14

Wingless Wonder

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Pretty much answered in the second post by Akiata. The other mods make a much more noticeable difference.

--
0==WW==0
"…axles of evil…" - george w. bush

Jan 14, 2004 | 01:29 AM

#15

dbasteve

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Re: Are drilled and slotted rotors worth buying? WRX2003

Quote:

Originally posted by WRX1138
I've had some performance modifications with power and now I'm looking for some stopping power. I'm still running on the WRX's stock sixteens and I'm waiting a while to get some Volk rims since they cost a fortune. I was wondering if anyone who had bought the Drilled and Slotted Rotors would recomend them. I know they enhance breaking and keep the brakes from overheating but I would like to know if it is really worth the $250 to get them. Any comments would be appreciated.

Key word = Performance modifications.

Stay with slotted or bigger.

Drilled rotors are fine on stock cars but when you start upgrading power then you need something heavy duty.

S/Steel lines and Motul RBF600 will make a difference too.

Steve

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