Brakes

MightyBoy tech questions and answers.
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fritz
Posts: 711
Joined: Fri Apr 16, 2004 11:21 am
Location: Perth WA

Just a question regarding wet weather braking.

I have just recently noticed (since getting my new mags) that in wet weather my brakes can be awfull in wet weather. I think it is because the pads are at times too cold to evaporate any water splashing onto them (which is happening much more since there is a great deal of open space on the mags), and then there isn't enough pressure heat the brakes (and clear the water) when needed. Basically there is nothing utill all of a sudden it comes on strong.

I am curious to hear from anyone who has got disc rortors which have the water evactuating grooves on them?
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Colin
Posts: 1145
Joined: Tue Apr 13, 2004 8:46 am
Location: South Coast (NSW)

when you know your going to brake apply the brakes lightly pre-braking to dry the rotors
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Brayden
Posts: 9101
Joined: Sun Apr 11, 2004 3:09 am
Location: Canberra ACT
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Well the slots are more designed to prevent glazing and promote heat dissipation, but I could see how they would disperse water.

To be honest after fitting them to my ute I have not noticed a huge difference except under extended use (on the track) where brake fading seemed non-existant. But that is hard to measure seeing as the rotors, pads, and fluid were all upgraded at the same time.

Actually the only thing I have really noticed is that after a trip to car lovers when using their degreaser chemicals the ute will actually stop when I leave, but again that is probably due more to the fact the pads are now a better compound and have contact surface with smooth rotors as opposed to my old grooved up ones.
F8B EFI turbo - Three pots and a snail.
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fritz
Posts: 711
Joined: Fri Apr 16, 2004 11:21 am
Location: Perth WA

Brayden, so you've got the dba 'slotted' rotors as apposed to the 'standard' ones?

Image

I actually thought slotted referred to the gap running down the middle (slot), but it seems that dba uses this terminolagy slightly differently.

I also notice that the 'slotted rotors don't have the groove running right to the edge like some rotors do. I guess if they dont actually clear the edge, they're can't actually be THAT proficient at clearing water? - Probably gives better initial bite though...?
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Brayden
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Joined: Sun Apr 11, 2004 3:09 am
Location: Canberra ACT
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Yes I have the slotted DBA's, although obviously not ventilated due to the thin nature of the disc.

As I mentioned the slots are to prevent glazing and promote heat dissipation, the actual disc itself is no different to a standard unit except for a few slots cut into them - they're made from exactly the same material, so initial bite is no better.
F8B EFI turbo - Three pots and a snail.
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