Removed Posted June 2, 2006 Share Posted June 2, 2006 oopsie daisy.... these are DBA slotted disks... now who said only drilled disks crack and one should go slotted as they don't crack? Quote Link to comment Share on other sites More sharing options...
Baptist Posted June 2, 2006 Share Posted June 2, 2006 I dunno, who did? Quote Link to comment Share on other sites More sharing options...
Removed Posted June 4, 2006 Author Share Posted June 4, 2006 not me, that's for sure I guess people should be quite careful on what they recommend and make bold statements that are not really supported by any hard evidence. I say go with what you think is best for your car and especially considering what use you actually make of it in the first place, but no need to preach inaccurate information Quote Link to comment Share on other sites More sharing options...
Baptist Posted June 4, 2006 Share Posted June 4, 2006 Who's preaching?? I dont get it. Quote Link to comment Share on other sites More sharing options...
Removed Posted June 4, 2006 Author Share Posted June 4, 2006 I'm sure you'll do, soner or later. I can't help but think all those supercar manufacturers with drilled disks have equipped their superfast machines with disks that would crack if used on a track. So, drilled or slotted? or drIlled AND slotted? I just say any of these 3 types can end up cracked, and there's no evidence that one type more than another one is more prone to cracking under extreme conditions. Now the fact that specific manufacturers do or do not recommend their disks for a specific application doesn't allow for saying that ALL those types, from other manufacturers need to abide by those rules Quote Link to comment Share on other sites More sharing options...
StephenG Posted June 4, 2006 Share Posted June 4, 2006 I was of the mind that the drilled and slotted discs were all about heat and brake-dust dissipation. Is that the case? Quote Link to comment Share on other sites More sharing options...
Removed Posted June 5, 2006 Author Share Posted June 5, 2006 yeah, the theory is there. Then the discussion rages on about the 3 types of them available ie drilled, slotted and drilled+slotted. Quote Link to comment Share on other sites More sharing options...
teddyonholiday Posted June 5, 2006 Share Posted June 5, 2006 Ok my penworth.... If I am looking for a strong item that has ventilation then I would look for specific characteristics. Round windows on a boats hull, round windows on the space shuttle and round windows on deep sea pressure vessels. This indicates to me round holes have to be "stronger" in the stress bits than square or slots. Surely following this then the drilled disks would be far stronger than the slotted disks, although sure the increase in leading edges from having slots in the face would improve the breaking forces surely for strength and reliable ventilation the holes would be better. OK flame me I am immortal anyway....... Quote Link to comment Share on other sites More sharing options...
Zzzz... Posted January 11, 2007 Share Posted January 11, 2007 OK my opinion and query Rounds ALWAYS distibute the stress applied to that hole evenly. Sharp corners are always stress concentrators, so a groove probably is rounded at the bottom but where it meets the top surface will have a corner. I guess in principle even drilled holes should have radius edges to prevent stress concentrations in the top surface, but that is more expensive and maybe the cheaper disks will not consider this. Also bare this in mind, drill and slot means you actually reduce the effective friction surface, so yes, you are going to allow gas to escape and prevent overheating, but at the same time by having less effective surfaces (because of all the holes and slots etc), aren't you going to require more energy (i.e heat) to have the similar braking effect. ? Then there is the issue of heat cycling and distortion, and judder, due to extra heat input, lower amount of metal, etc...but all this gets into areas where I am a complete novice and would not even dream to comment... captain sensible says keep as much friction surface as you can... Quote Link to comment Share on other sites More sharing options...
stuey Posted January 11, 2007 Share Posted January 11, 2007 oopsie daisy.... these are DBA slotted disks... now who said only drilled disks crack and one should go slotted as they don't crack? crackin that.........!! Quote Link to comment Share on other sites More sharing options...
sinbad Posted January 11, 2007 Share Posted January 11, 2007 Ive seen this pic before quite a while back...if memory serves me right i believe the crack was down to the slot being incorrectly cut. I believe it was that the slot should not go near to the edge of the disk and as you can see from the picture it deos on two accounts - the small slot goes to the top outer edge of the disc and the larger slot goes into the inner red bit. TheMinel - where did you get the picture from? Quote Link to comment Share on other sites More sharing options...
captint Posted January 11, 2007 Share Posted January 11, 2007 Plus if they are drilled they need to be factory cast drilled brakes and not aftermarket drilled like tarox Quote Link to comment Share on other sites More sharing options...
Removed Posted January 11, 2007 Author Share Posted January 11, 2007 a US Z forum. Thread is ovr 6 months old btw Quote Link to comment Share on other sites More sharing options...
sinbad Posted January 11, 2007 Share Posted January 11, 2007 Oh yeah didn't notice? Doh.. With someone posting on it today i thought it was a recent topic. Im pretty sure i read it on a honda website. anyway sorry. Quote Link to comment Share on other sites More sharing options...
lomoto Posted January 11, 2007 Share Posted January 11, 2007 Oh yeah didn't notice? Doh..With someone posting on it today i thought it was a recent topic. Im pretty sure i read it on a honda website. anyway sorry. you got that exhaust yet Ruby?? Quote Link to comment Share on other sites More sharing options...
Baptist Posted January 11, 2007 Share Posted January 11, 2007 Might be worth putting into perspective that this is only 1 disc that has cracked. How many others do we know that have gone???? component failure can happen in any brand/type of disc, this one just happens to be a DBA. Unless it was something that was common place, I wouldnt let it put me off buying them. My AP discs are slotted, no problems with cracking. Loads of people with DBA's with no problems. Quote Link to comment Share on other sites More sharing options...
Removed Posted January 11, 2007 Author Share Posted January 11, 2007 my original post was to show that slotted disks can crack too, and to stop people being put off drilled, for no apparent reason (apart from hearsay and no first hand experiences) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.