Bob4256's SGM Build Thread
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Lexus Champion
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From: Weston, FL
They do cool the brakes faster, but the drilled holes can cause cracking under heavy braking. But as long as your not tracking the car, want it for looks, and can live with less pad life, then you wont have any problems with slotted/drilled rotors
Thats what I said too lol. Then I needed pads, and then found a great deal on 350 calipers so I couldnt wait any longer
If you care to know... generally speaking holes can cause cracking due to a higher stress concentration. A part will be the strongest when the stress can be distributed as evenly as possibly across the area of the part, however geometric discontinuities (such as holes, sharp corners, changes in cross sectional area, etc) result in an increase in stress in that particular area. These areas of increased stress can cause a material to fail if the stress exceeds the strength of that material. Fatigue cracks always start at stress concentration points.
I doubt the cracking seen on most drilled rotors are actually through the entire face of the rotor. I would assume they are more or less surface type defects... just an assumption though as I have no real world experience with them.
I'm no expert in rotors in particular, but at one point in time I did learn about this in various engineering classes, so that is all I can really remember haha
I doubt the cracking seen on most drilled rotors are actually through the entire face of the rotor. I would assume they are more or less surface type defects... just an assumption though as I have no real world experience with them.
I'm no expert in rotors in particular, but at one point in time I did learn about this in various engineering classes, so that is all I can really remember haha
Last edited by zmcgovern4; May 1, 2013 at 07:05 AM.
Originally Posted by dorkacho
on a side note, why would it eat thru faster?
and i thought the drilled ones can disipate heat faster?
and i thought the drilled ones can disipate heat faster?
Honestly, I cant tell you the specific reason. Search for "rotor" in the suspension and brakes section and you can find a couple posts about it.
They do cool the brakes faster, but the drilled holes can cause cracking under heavy braking. But as long as your not tracking the car, want it for looks, and can live with less pad life, then you wont have any problems with slotted/drilled rotors
They do cool the brakes faster, but the drilled holes can cause cracking under heavy braking. But as long as your not tracking the car, want it for looks, and can live with less pad life, then you wont have any problems with slotted/drilled rotors
And as far as dissipating heat, it's not noticeable unless you're doing a lot of prolonged heavy braking. In which case, you'd be better off with rotors that are slotted only. Almost the same heat dissipation, but they're stronger than slotted and drilled rotors.
Thread Starter
Lexus Champion
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From: Weston, FL
If you care to know... generally speaking holes can cause cracking due to a higher stress concentration. A part will be the strongest when the stress can be distributed as evenly as possibly across the area of the part, however geometric discontinuities (such as holes, sharp corners, changes in cross sectional area, etc) result in an increase in stress in that particular area. These areas of increased stress can cause a material to fail if the stress exceeds the strength of that material. Fatigue cracks always start at stress concentration points.
I'm no expert in rotors in particular, but at one point in time I did learn about this in various engineering classes, so that is all I can really remember haha
I'm no expert in rotors in particular, but at one point in time I did learn about this in various engineering classes, so that is all I can really remember haha
Thread Starter
Lexus Champion
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From: Weston, FL
I believe they eat through pads faster because of the uneven surface.
And as far as dissipating heat, it's not noticeable unless you're doing a lot of prolonged heavy braking. In which case, you'd be better off with rotors that are slotted only. Almost the same heat dissipation, but they're stronger than slotted and drilled rotors.
And as far as dissipating heat, it's not noticeable unless you're doing a lot of prolonged heavy braking. In which case, you'd be better off with rotors that are slotted only. Almost the same heat dissipation, but they're stronger than slotted and drilled rotors.
At first, I wanted to get slotted only, but I really liked the look of the slotted followed by two rows of dimples (waited a month for this specific rotor) so I got that instead.
Everything about this build is nice man, but i do have to say the carbon fiber kit you bought looks cheesy to me. the cuts they made dont seem to match up perfectly, how come you didn't just opt out for a sheet of 3m 1080 vinyl and make the cuts yourself? not hating just my .02 cents. sick calipers tho love the upgrade.
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Lexus Champion
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From: Weston, FL
Everything about this build is nice man, but i do have to say the carbon fiber kit you bought looks cheesy to me. the cuts they made dont seem to match up perfectly, how come you didn't just opt out for a sheet of 3m 1080 vinyl and make the cuts yourself? not hating just my .02 cents. sick calipers tho love the upgrade.
This overlay kit looks exactly the same as the 3M vinyl did, not sure about the quality tho, but I have no complaints yet. And yeah I know some of the cuts arent great, but I was expecting that for $40. I mainly wanted the center console overlay so I dont mind the other imperfections
Lexus Test Driver
Joined: Apr 2012
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From: Orange County
sickest picture of your car I've ever seen.. actually, sickest picture of an SGM 2IS I've ever seen. This is STRAIGHT SEX. 
Thread Starter
Lexus Champion
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From: Weston, FL
Thread Starter
Lexus Champion
iTrader: (17)
Joined: Sep 2010
Posts: 4,965
Likes: 11
From: Weston, FL
I believe they eat through pads faster because of the uneven surface.
And as far as dissipating heat, it's not noticeable unless you're doing a lot of prolonged heavy braking. In which case, you'd be better off with rotors that are slotted only. Almost the same heat dissipation, but they're stronger than slotted and drilled rotors.
And as far as dissipating heat, it's not noticeable unless you're doing a lot of prolonged heavy braking. In which case, you'd be better off with rotors that are slotted only. Almost the same heat dissipation, but they're stronger than slotted and drilled rotors.
