Ok, I don't mean to sound dumb but, I installed Power Slot rotors on all 4 corners of my 2004 SE about 2 months ago. I followed the directions to the T, I installed them in the direction that the arrow labels were pointing. When everything was done, the slots on the rotors were facing to the front of the car ( like this: / ). But now, looking at other Bonneville's on this site running these rotors I've noticed that the slots are facing rearward ( like this: \ ).

Which direction is the correct one?

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2004 Bonneville SE: Dark Ming Blue Metallic (1 of 778), Bench seats, Cloth Interior, Beldin wires, Power Stop Rotors, 274724...... RIP

On mine they go / facing the front.


Also, FWIW, I only run these rotors up front, so they may be different for the back but shouldn't be.

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

when i did my vette mine are like the ones in the pic above. the top of the slot faces forward (makes contact with the pad 1st) per the directions IIRC. they should be labled with a L and a R to indicate left/right.

S

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Shane "RedZMonte"
2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...

Most sweep back, but some don't.

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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights

Cool! Just wanted to make sure that I didn't screw something up. Thanks everyone!

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2004 Bonneville SE: Dark Ming Blue Metallic (1 of 778), Bench seats, Cloth Interior, Beldin wires, Power Stop Rotors, 274724...... RIP

If the slot doesn't go all the way past the outer edge, it doesn't matter. The slot doesn't really do you any good anyway in that case. If the slot goes all the way to the edge, you want it the opposite of the picture above.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

So what you're saying is that that slots on these rotors are just a sales gimmick and won't do anything for dispersing heat?

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2004 Bonneville SE: Dark Ming Blue Metallic (1 of 778), Bench seats, Cloth Interior, Beldin wires, Power Stop Rotors, 274724...... RIP

They've never been about dispersing heat, it's about removing gas from between the pad and the rotor, and helping pad material have a place to escape as it wears. However, if the slots don't go all the way to the edge of the rotor, they really don't do a whole lot for de-gassing and removing material...

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Bye Bye:

RIP sandrock

And if they go all the way to the edge, they also aid in shedding water.

The problem lies in manufacturing technique. In order for the rotor to be as strong and not prone to cracking with slots all the way to the edge, they have to be hardened after slotting. This is more expensive than not.

Yes, non-edge-relieved slotted rotors do help with pad gasses better than non-slotted, but they're not nearly as good as fully-relieved to the edge, which is how Powerslot USED to make them. Yours will be no advantage on rainy days, either.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

don't the slots help "Clear/clean" the pad as well to help prevent glazing and what not?

S

_________________
Shane "RedZMonte"
2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...

Sure, until the slots plug up with pad material and can't clear themselves out because they're not relieved to the edge of the rotor. After about the first or second week, the slot is useless (unless relieved to the edge).

Think about how it works. Make sense?

_________________

Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

I understand how it works... to be honest with you my Power Slot rotors have never plugged on my vette and i have done a few good solid stops... Maybe i don't hammer then hard enough. Lol i know what your saying, we had 4 Lotus Evora's (pre-production models) stop in at our Lexus dealer and the drilled holes were plugged 99% and had hair line stress cracks on them, i guess they were in AZ doing some hard driving testing the cars (had all kinds of testing equipment hooked up to the cars, taped to the bodies and what not).

S

_________________
Shane "RedZMonte"
2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...

After 4 months now of some crazy dusty pads, my slots are still clear. FWIW

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

Depending on pad material, driving habits, and environment, don't plan on them staying clear in the long term. I've had 2 sets of slotted rotors in the past, and both had problems in varying degrees. I use a screwdriver to clear the slots at least once a year.

_________________

Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers