DBA slotted/drilled rotors on Range Rover Classic

[Tawayama]

Installed a pair of DBA slotted/drilled rotors on the front axle of my Range Rover Classic ('94) today.

Went on slick as a whistle, no problems, no rusted bolts, no surprizes (for a change). I had to paint the drive flange metalic gold to match the rotor of course.

/forum/emoticons/shocked.gif

I'm using the pads I had in the calipers previously, from NAPA. I will probably change out to factory (Lockheed) pads when these wear out (at least 70% left).

Just curious if any others are using the DBA rotors.

Here's a pic:

Michael Slade
Tawàyama Safaris Inc.
http://www.tawayama.com

[BajaTaco]

Wow - that came out looking pretty snazzy. http://www.4wdtrips.net/forum/emoticons/cool.gif Sometimes I wish I had some groovy brakes...


http://www.bajataco.com

[JackSilb]

> Just curious if any others are using the DBA rotors.

Nop here.
Since we talking about breaks. What is the deal with the 'new' ceramic pads? Will they work on any rotors?

What kids of nice break upgrade one should consider doing? My 4Runner is running on the heavy side these days.

I am sure people will be able to use this discussion in the future.

Thanks for the replies in advance.
-JACK


So much to see, so little time. Try using your 4WD tosee and do more.
Tread Lightly! empowers generations to enjoy the outdoors responsibly...
http://www.4wdtrips.net

[GoodTimes]

Nice! Those look like a direct knock-off of the TRW (A-spec.) rotors (which are still made up in Carson, CA). Or maybe it is the other way around? Not to many companies are double disk grinding (equipment cost is pretty high). Are the cross drilled holes counter sunk, or do they have a actual radius cut into them?

I always liked the drilled AND slotted rotors. You get to cooling of cross drilled, and the better particulate removal of the slotted rotors. Of course the plating is always a good idea. If [the plating was] done properly, the vents will stay clean for years to come, adding to the cooling of the rotors.

Jack, what brake problems do you have?


olllllllo <---- If you can read that, roll me over.

KG6OWO

Price is soon forgotton, quality is not.

[Tawayama]

Here are some detail shots of the rotor. I don't think they're knock offs. I know DBA has been making rotors for a LONG time, so maybe they just look similar because of evolution?

/forum/emoticons/biggrin.gif

Michael Slade
Tawàyama Safaris Inc.
http://www.tawayama.com

[JackSilb]

Hey, talk to us about the details you guys are comment on. Why are these important?

-JACK


So much to see, so little time. Try using your 4WD tosee and do more.
Tread Lightly! empowers generations to enjoy the outdoors responsibly...
http://www.4wdtrips.net

[GoodTimes]

Those look like TRW rotors. It almost seems like we used to package some of them as DBA--maybe not.http://www.4wdtrips.net/forum/emoticons/headscratch.gif I never really got into the marketing end of the business.</div>



Jack, "Double Disk Grinding" is a process that is used to put the finish on the friction surface of the rotors. It is just like it sounds, you use 2 big grind wheels to grind each side of the rotor at the same time. It gaurentees virtually zero run-out and near perfect parallelism of the friction surfaces, as well as providing a surface that promotes fast bed-in time of the pads. In addition, most consumers find the asthetics of the double disk ground rotors to be appealing, compared to the other common method, which is straddle cutting. A good double disk grinding machine will cost you about $850K, plus the cost of the support equipment (another $100K), and the grind wheels run about $300 each (we would go through 1 - 2 sets per 10 hour shift). http://www.4wdtrips.net/forum/emoticons/freaked.gif </div>



The holes are on those rotors are definately countersunk, which is just what it sounds like. The holes are countersunk with a 60* bit. This is easy to do, but it leaves sharp edges which can be prone to cracking under high heat situations. Cutting a radius is more resistant to cracks, but it is very expensive to do, because the cutter has to be custom made, and they are easy to break. The countersink is very inexpensive in relation to a radius cutter. TRW countersunk all their cross drilled rotors, as did pretty much everyone (I can't think of anyone who still cuts a radius).</div>






olllllllo <---- If you can read that, roll me over.

KG6OWO

Price is soon forgotton, quality is not.

[GoodTimes]

After thinking about it for a couple of minutes, those are not TRW rotors. Those were drilled, slotted and ground after they were plated. We did ours before we plated them.


olllllllo <---- If you can read that, roll me over.

KG6OWO

Price is soon forgotton, quality is not.

[Tawayama]

yeah, I wondered about that too.

I saw a lot of surfaces that really did need the plating. Unfortunately it was removed on final machining. Wish they would have done it after.

/forum/emoticons/headscratch.gif

Michael Slade
Tawàyama Safaris Inc.
http://www.tawayama.com

[blupaddler]

So...</div>
It has been two weeks now. What are your impressions with the new rotors?</div>
I have been told/read that the slotted rotors wear out quicker than others. Do you also feel you have better stopping power- or -any noticable benefits?</div>
I ask b/c my Landcruiser will be needing some soon, and I was looking into the DBA's as an option. Every little bit counts trying to stop that beast.http://www.4wdtrips.net/forum/emoticons/biggrin.gif </div>

WHERE 2 NEXT


robb

[JackSilb]

Any replies to Robb and I here?

We need stopping power.
-JACK


So much to see, so little time. Try using your 4WD tosee and do more.
Tread Lightly! empowers generations to enjoy the outdoors responsibly...
http://www.4wdtrips.net