R33 Dba Rotors

[BOVed]

Just after some opinions, whats better for everyday street driving?

Xdrilled or slotted? not a big difference in price and cosmetically I prefer the look of drilled rotors like the porsche ones but heard of warping? probably only happens after hard race/drift driving which Im not going to be doing in a hurry but any other pros/cons for either?

[blind_elk]

The x-drilled rotors fitted to R32 GT-Rs had a habit of cracking out from the drillhole.

Much safer with just slotted.

[Abo Bob]

The DBA ones do too. Slotted are fine.

[TurboX]

Even the Porsche ones crack so thats why I went with DBA Slotted and when I came onto the freeway recently slightly faster than I should have and saw what I thought was an unmarked police car pulling someone up about two hundred meters up the road they proved their worth.

Never has my GTS4 stopped so surely and swiftly ever before it nearly turned me on more than the acceleration at the drags;-)

[Busky2k]

Slotted for sure. Cross drilled are for looks (and even then they dont look tuff anyway).

[BOVed]

I knew there must be a reason why everyones got slotted not xdrilled thanks for your replys

[NateR31]

x drilled arent just for looks you know, they do serve a purpose.

the discs cool down alot faster, so less chances of uber brake fade

[scathing]

Just after some opinions, whats better for everyday street driving?

Xdrilled or slotted?

Neither. Plane jane rotors would be the best.

Even putting the slots into rotors introduces a weak point (as I found out the hard way), and since you're not braking hard enough to see the performance gain you're paying for something you just won't use.

[Craved]

i can say this...

the kangaroo paw from DBA work great.

i bought a set of DBA4000 slotted rotors..

and was supplied the wrong ones (GTR ones) which were too thick and wrong offset.. only found this out after installing them. so it marked them and they wouldn't take them back after supplying the wrong ones..

any way..

machined the slots off them to get them to fit, and they still work awesome..

almost no fade after a full 20 minute session at wake field runnin 1m 15s laps.

where as the std ones would produce fade in that time.

so yeah, slotted if you can afford it (noting that it should wear your pads out quicker)

or std replacements using the kangaroo paw design for cooling..

[GTRgeoff]

I'm not happy with the design of DBA slotted so recommend the RDA items.

The original DBA slots went short of the circumference and result in a major wearing of the outer 10mm of circumference (as has happened on Roy's car) so they put a small reverse slot overlapping the long slot. Helps a little but still wears fast in that region as noted on some tracked GTR's. I won't bore you all with the long version. Also the Kanga paw is not aerodynamically or structurally sound in my professional opinion given the reports of failures and my analysis of the design. Perhaps it all stems from poor metallurgy.

Ultimately the choice is yours but I think DBA market share is more advertising and novelty than actual product worth and recommend the RDA slotted or the new slotted and dimpled which cost a bit more. I have the RDA discs on my track GTSt and my GTR33 came with DBA slotted which I am watching closely. I don't track the GTR but still have cause to enjoy it. It still needs braided lines, decent pads and a master stopper to be directly comparable to the GTSt but the discs are the maor cause of concern in their wear characteristics. Pads will make the difference as well with racebrakes.com.au RB74 my choice for road/sprints. there are better track pads though.

[Evil]

i have dba xdrilled rotors at the front (ordered 4000s but got these instead) and have had no problems... if you do the odd track day and mainly do street driving they are great... oh yeah i think pad choice is just as important (using ferodo ds3000)...

[Busky2k]

x drilled arent just for looks you know, they do serve a purpose.

the discs cool down alot faster, so less chances of uber brake fade

Well drilling removes vital mass from the disc, weaking its structure and reducing its heat sinking capabilities. Drilling is fine for the street, but you wont see em on any track car.

[Craved]

i'll agree with the RB74 pads, they are really good on the street and track.

always run these.

do RDA have a similar product to the DBA5000 series ?

ally hat for heat transfer.. only down side is trying to get them machined requires a proper mill to get them flat as there is nothing to bolt em down with.