Jump to content
SAU Community

Recommended Posts

Hi All,

Shopping for slotted rotors for my R34 GTR.

Was hoping someone could point me in the direction of a supplier that still has the DBA 4000 old wiper slot pattern if possible.

Maybe someone still has old stock etc remaining on the shelf?

Just a personal preference, however if necessary will settle for the new style design.

Thanks.

Old design -

dba4000series03.jpg

New design -

405550551024x387.jpg

When new models come out, like most things, the old stock is returned to the manufacturer or sold on 'special' to clear and rebates given.

You'll have a hard time finding them in most instances. What business wants to carry old stock when customers want new stuff? :)

The old design was prone to cracking when pushed. It makes no sense to try to get the flawed design now that its been superceeded with a better design.

^^^ this

Adam recalls how these were prone to cracking.

Any slots that go to the edge, and at right angles to the edge, are prone to cracking.

It's the same principle where...

* a glass cutter needs to go right to the edge for glass to crack - if it doesn't it's hard to snap

* a tablet that is scored across the middle to enable a 1/2 dose needs the scoring to go to the edge to facilitate cracking

So you wouldn't want to have your rotor slots anywhere near the edge; or worse still, perpendicular to the edge.

The "NEW OLD" model fixed this problem, the slots stop before the edge by around 5mm, on the front anyway, and I never heard of anyone having problems with the rears.

Skylines are far too front heavy for the rears to get the same level of heat/cracking going on.

Most people will replace the fronts twice before even touching the rears once in most cases.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Latest Posts

    • Hope you aren't too sore after that one, might take a day or 2 to notice yet and I guess it is a loooooong drive home. On the bright side, tube frame front end is a thing at superlap, right?
    • https://www.facebook.com/share/p/18rmVb1SKB/ 
    • The chart of front pressure to rear pressure (with one being on the x axis and the other being on the y axis) is not a straight line on a typical proportioning valve. At lower pressures there is a straight line with one slope, and at higher pressures that changes to a lower slope. That creates a bend in the line at that pressure, called the knee point. If you do not change the proportionng as the pressure gets higher, you will suffer excessive pressure (at one end of the car or the other, depending on which way you look at the proportioning action) and then get lockups at that end. The HFM BM57, from my memory of previous discussions, is based on the BM57 from a different car (to a Skyline), with a different requirement for the location of the knee point and the distribution of pressure front to rear, and so is not a good choice for an upgrade on a Skyline. Here's a couple of links to some old posts, one from here, one from elsewhere. A lot of it pertains to adjustable prop valves, but the idea is the same. There are plenty of discussions on here about this issue from al the many years of people wanting a cheap/accessible option. https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/ https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/  
    • Yeah dunno why johhny posted that here with no context, just post on FB/insta bro where he put it up?  Laine had an off at T4 during Thurs prac, he's ok, car is less than perfect, they are done for the weekend, he can fill in the rest. Bando also binned it like 100m up the road.   
    • I feel there must have been a FB/insta post and the weekend did not start well at all I hope everyone is all okay
×
×
  • Create New...