Slotted Rotors

[AzzurrA]

Just a really quick/simple question for you all...

Slotted rotors - are they cast with the slots, or do they have the slots machined into a blank disc?

Reason i ask is i'm chasing some DBA4909 (DBA4000 Slotted rotors for R32 GTS-t) at the moment, and DBA have told the guy sourcing them for me that the only ones the have left in Stock in Australia is one pair of non-slotted DBA4000 rotors, and that they'll send them off to be slotted, and bobs your uncle... DBA 4000 Slotted Rotors?

does this sound right to you, or are they being dodgey?

[Roy]

You wouldnt bother casting the solts in them as they would only need to be machined anyway. The rotors are machined when they come out of the casting/ So if they were cast with the slots they would soon disappear during post casting machining.

[AzzurrA]

cheers

i thought that would be the case, as if they cast the slots they would have dags/roughness in them, but i just wanted to make sure they weren't trying to pull a dodgey

[ellie]

So what about standard rotors? All for of my rotors are practically new so are you able to get them slotted?

[tacker]

Do your self a favor and check out the RDA discs, not DBA is a different company. Dont get me wrong the DBA product is very good just pricey.

[SteveL]

does this sound right to you, or are they being dodgey?

It's fine. I just buy standard rotors and have them slotted by a friend...much cheaper and exactly the same result.

[GTRgeoff]

Some slotted are cast in and then deburred. Gives a different material structure to resist cracking but most are just machined.

[OMG 101]

is it cheaper to buy blanks and get them drilled? any idea on price?

sorry to bring this up from the dead, but search function brought me here.

[Duncan]

why do you want them drilled?

[GTR-N1]

why do you want them drilled?

...wants to pay more for less

[BLACK BEAST]

slotted is better than drilled

[central coast person]

Even better all up get slotted and dimpled from RDA!!!

DBA are a great brand and RDA aswell and i cannot tell the difference but RDA do slotted with dimpled rotors which are a one of a kind and if you get them off Ebay in the UK they will be here in a week and VERY! cheap. If you want them in australia be prepared to pay

I also think they are zinc plated to iliminate rust.

[Duncan]

lol RDA = Rotors and Drums Australia. How crazy that they ship to the UK, sell it there and ship it back for less than you can buy locally. Having said that check the RDA group buy in the group buy section the prices are excellent

[gslrallysport]

He's probably getting confused... RDA make the zinc passivated slotted and dimpled in Australia under license to EBC in the UK. The rotors he's seen are probably just EBC's. There's NO WAY that RDA rotors are exported to the UK.

[central coast person]

yeah i did mean to type EBC but i get the two mixed up just check ebay!

Edited May 4, 2010 by central coast person

[OMG 101]

sorry im really new to everything with cars, I have spent time and money buying different Rotors for my 4door 34 ive had my rotors machined twice so im going to need to get new ones, ive tried 4 different sets, from RDA the ones they suggested i use and then ones off the actual measurements off the old ones, we got close on the last set, which im sure was 265 x 30 but i needed 265 x 25.

I was thinking of getting a blank set in the size and getting them drilled thats why i asked about drilling, but now im being told they dont do one off blanks. it was a year or so ago, just trying to remember the actual size, will get them measured in a few days once i get paid, all i know is RDA in the end couldn't help me, they went through their books and we tried what they had, i read another post a while back someone had posted up the measurements of a few different skyline rotor sizes but mine was not on them, so i left it for a while as the machining cleared up my shuddering again, all is still well at the moment but im sure within 6 months i will definitely be needing to change the rotors.

anyone ever heard of this problem, or know a solution?

whats an upgrade to GTT Brakes worth?

[Deano 1]

any idea where you can get the rotors sloted? is there a workshop in sydney that dose it?

[jjman]

rda slotted rotors are sweet and great value for money. Only thing is that the zinc coating is crap n mine started to get that rusty colour pretty quick. Iv since removed them all again and paointed them all up with caliper paint on those sections (now also matches wheels n body colour)

so if you get the RDA ones make sure u do this unless you like the 'rugged rusty look'.