I need ROTORS: Slotted vs. Drilled vs. OEM ?????

Originally Posted by Rob Levinson * UUC Motorwerks

It will cost you $200K. That's what I'll need to cover setup fees and for you to buy an entire production run for the part numbers (left and right), because the "regular" price would be infeasibly high for other purchasers. But, since I don't see the point in wasting time, I'm not actually going to produce them.

I guess that's a roundabout way of agreeing that rotors with cast in holes don't exist as a real option even if we continue to hold different opinions on their existence as a theoretical option.

Glad you finally came around.

Originally Posted by jpr

I guess that's a roundabout way of agreeing that rotors with cast in holes don't exist as a real option even if we continue to hold different opinions on their existence as a theoretical option.

Glad you finally came around.

Damn, you got me to comment. Twisting my words will get a response.

The rotors that we've been discussing are the OEM floating rotors made for the German car manufacturers. Obviously, I don't make those.

The plain and slotted rotors that I am referring to that we do currently make are 1-piece. We do not make them cast-perforated, but could. The cost for me to make them would exceed the OEM perforated offerings, therefore it does not make sense for me to make them.

Can we please have a moratorium on misinterpreting or twisting my comments, hmmm?

- Rob

'twas not my intent to do so. I thought it clear that we have been discussing much more than just the SHW floating rotors.

The general question was - if I want to buy rotors with cast in holes, who do I call and how do I know what I am getting?

Is there a different answer than what you posted before?

Originally Posted by jpr

'twas not my intent to do so. I thought it clear that we have been discussing much more than just the SHW floating rotors.

The general question was - if I want to buy rotors with cast in holes, who do I call and how do I know what I am getting?

Is there a different answer than what you posted before?

Diret Fit OE-size for your car? None that I know of.

Maybe that's the disconnect you and I are having... I am only saying that cast-perforation technology exists. I am also agreeing that the aftermarket companies you listed previously do not use that technology, but are machine-drilled.

- Rob

How about -
(1) for any E46
(2) for any car (assuming cast iron rotors, not the exocitc carbon/ceramic/kryptonite rotors)

Originally Posted by jpr

I guess that's a roundabout way of agreeing that rotors with cast in holes don't exist as a real option even if we continue to hold different opinions on their existence as a theoretical option.

Originally Posted by Rob Levinson * UUC Motorwerks

Diret Fit OE-size for your car? None that I know of.

Maybe that's the disconnect you and I are having... I am only saying that cast-perforation technology exists. I am also agreeing that the aftermarket companies you listed previously do not use that technology, but are machine-drilled.

- Rob

Now doesn't that sound like we agree?

Originally Posted by jpr

How about -
(1) for any E46
(2) for any car (assuming cast iron rotors, not the exocitc carbon/ceramic/kryptonite rotors)

Again, you're asking questions we've discussed before. That doesn't make for scintillating conversation.

Originally Posted by Rob Levinson * UUC Motorwerks

Again, you're asking questions we've discussed before. That doesn't make for scintillating conversation.

Just wanted to make sure I understood you correctly - I take you previous answer applies -

None that I know of...I am only saying that cast-perforation technology exists. I am also agreeing that the aftermarket companies you listed previously do not use that technology, but are machine-drilled.

So even if we grant for arguments sake that cast-perforation technology exists, there is not one single example of anybody actually using it to produce a rotor you can buy for any make or model of car.

Originally Posted by jpr

Just wanted to make sure I understood you correctly - I take you previous answer applies -

So even if we grant for arguments sake that cast-perforation technology exists, there is not one single example of anybody actually using it to produce a rotor you can buy for any make or model of car.

Why are you asking leading questions like that when you know that the cast perforated rotors as used by the various manufacturer's motorsport divisions are the source of your ongoing tirade?

It really is amusing that you think you've "discovered" some great cover-up and keep making new posts about it. Oh well, I don't see that it's exactly accomplishing anything useful.

- Rob

Originally Posted by Rob Levinson * UUC Motorwerks

Why are you asking leading questions like that when you know that the cast perforated rotors as used by the various manufacturer's motorsport divisions are the source of your ongoing tirade?

I promise you I am actually totally ignorant of that.

The closest I can come was the earlier mention of SHW as the manufacturer of the BMW Motorsport, Porsche, and a few other high-end rotors. But I believe we established, and you concurred that those are drilled ( "I am also agreeing that the aftermarket companies you listed previously do not use that technology, but are machine-drilled." )

So I'm back where I started, still trying to find an actual real live example of a cast perforated rotor.

Originally Posted by jpr

I promise you I am actually totally ignorant of that.

The closest I can come was the earlier mention of SHW as the manufacturer of the BMW Motorsport, Porsche, and a few other high-end rotors. But I believe we established, and you concurred that those are drilled ( "I am also agreeing that the aftermarket companies you listed previously do not use that technology, but are machine-drilled." )

So I'm back where I started, still trying to find an actaul real live example of a cast perforated rotor.

Ah, then maybe THAT is the true source of the disconnect! SHW, etc., are not "aftermarket"... they are OEM.

- Rob

Originally Posted by Rob Levinson * UUC Motorwerks

Ah, then maybe THAT is the true source of the disconnect! SHW, etc., are not "aftermarket"... they are OEM.

- Rob

Okay - and SHW rotors are drilled - see post #44 - http://forum.e46fanatics.com/showpos...0&postcount=44

So I'm back where I started, still trying to find an actual real live example of a cast perforated rotor

Originally Posted by jpr

Okay - and SHW rotors are drilled - see post #44 - http://forum.e46fanatics.com/showpos...0&postcount=44

So I'm back where I started, still trying to find an actual real live example of a cast perforated rotor

Me too. Anyone out there have any?

Originally Posted by Rob Levinson * UUC Motorwerks

Diret Fit OE-size for your car? None that I know of.

Maybe that's the disconnect you and I are having... I am only saying that cast-perforation technology exists. I am also agreeing that the aftermarket companies you listed previously do not use that technology, but are machine-drilled.

- Rob

but in one of your first posts on pg 1 the assertion is that the OE Motorsport brakes are in fact cast...you sell those. your tune has changed from pg 1 to 5

http://www.bb-automobiltechnik.de/bb...msen/index.php
http://www.928gt.com/p-1841-big-brak...ece-rotor.aspx
something about cast-hole rotors with their BBKs

Originally Posted by BrianJ1888

http://www.bb-automobiltechnik.de/bb...msen/index.php
http://www.928gt.com/p-1841-big-brak...ece-rotor.aspx
something about cast-hole rotors with their BBKs

Couple of interesting things to note about that -
Both links are to distributors, not manufacturers. It is unclear who actually makes the rotors. It's a reasonably safe bet that the Porsche rotors in the second link were originally made by SHW. And as noted earlier, SHW drills their rotors. FWIW, you will frequently see Porsche crop up as having rotors with cast in holes, but the more you look in to it, the less you will find. My guess for how the rumor started is that Porsche does in fact make some rotors with holes without a subsequent drilling process. These however, are their high end carbon/ceramic/I-really-don't-know-what rotors. However, they aren't exactly cast in the same way you would think of casting in terms of normal rotors. Anyway, my supposition is that what started out as true for some specific exotic rotors, came to be misinterpreted as applicable to all Porsche rotors.

I applaud your efforts and encourage you to continue. But I'll give you the hint to start looking a little deeper at who is actually making the rotors and what they claim, as opposed to what is claimed by people merely selling them.

I saw something about the Porsche rotors being cast with dimples, and then the dimples being drilled out, but I'm no expert on their stuff. Regardless, I don't think you really get your money's worth when trying to get "cast-hole" rotors vs buying regular drilled and/or slotted rotors off the shelf. If you want something you know will hold up to extreme abuse, get carbon-ceramic Porsche brakes, or one of the equivalent aftermarket kits that are now being released.

Originally Posted by BrianJ1888

I saw something about the Porsche rotors being cast with dimples, and then the dimples being drilled out, but I'm no expert on their stuff. Regardless, I don't think you really get your money's worth when trying to get "cast-hole" rotors vs buying regular drilled and/or slotted rotors off the shelf. If you want something you know will hold up to extreme abuse, get carbon-ceramic Porsche brakes, or one of the equivalent aftermarket kits that are now being released.

I think I may have read that same (or a similar thread) as well. If I recall correctly, the story went something this -
* Porsche rotors are cast with holes!
* Well, maybe they aren't really cast with holes, but they're cast with dimples!
* Well, okay they aren't cast with either holes or dimples after all....
But it took a lot longer to get there in real life.

For those that may be interested in looking in to this further, here's some links to manufacturers and high profile aftermarket companies.
So far as BMW OEM's - it is the Textar division of of TMD Friction that supplies most of the pads, with Jurid supplying a specific few. While Balo and Zimmerman are the most frequently cited as providing the OEM rotors, I wouldn't be surprised if Textar provided some or of all of them. SHW, as mentioned before, makes the M floating rotors.

http://www.apracing.com/car/site.htm
http://www.ate-na.com/generator/www/...rotors_us.html
http://www.balo.de/index.html
http://www.brembo.com/US/
http://www.dba.com.au/2006/dba_company.asp
http://www.*********.com/
http://www.eurac-group.com/index.php
http://www.frozenrotors.com/
http://www.fte.de/Homepage_en.FTE
http://www.movit.de/htm/homefut2.htm
http://www.pbr.com.au/
http://www.performancefriction.com/pages/products.htm
http://www.powerslot.com/
http://www.autospecialty.com/
http://www.racingbrake.com/Default.asp
http://www.rotora.com/cgi-local/Soft...html?E+scstore
http://www.shw.de/index.php?28
http://www.stoptech.com/
http://www.textar.com/index.jsp
http://www.tmdfriction.de/index.jsp
http://www.wilwood.com/
http://www.otto-zimmermann.de/