nelsonian101 Donating Members 961 Member For: 16y 11m 16d Gender: Male Location: Sydney Posted 20/09/12 06:34 AM Share Posted 20/09/12 06:34 AM (edited) They had a very hard life with maybe 6 track days (on Michelin Slicks/ Project Mu Race pads) and about 30,000kms road driving but they died yesterday at Sydney Motorsport park. Down to about 30mm.I am usually VERY careful with cooldown laps (even drive out on the road for 5km at Wakefield) but the red flag came out late in the session too many times yesterday and didn't allow adequate cooldown.I usually dont hit the brakes in the pit garage (and leave handbrake off on rears), just coast the last metre but in neutral then put in park.Even use my idustrial fan on them sometimes too.Anyone else seen cracking like this? Edited 20/09/12 06:35 AM by nelsonian101 Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/ Share on other sites More sharing options...
ScatterBrain Donating Members 316 Member For: 16y 8d Gender: Male Location: Brisbane Posted 20/09/12 08:23 AM Share Posted 20/09/12 08:23 AM yeah I've seen cracks like that, obviously the rotors are getting way too hot. Are you running 6 or 4 pots on the front? Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297786 Share on other sites More sharing options...
bjc Donating Members 2,823 Member For: 21y 9m 6d Gender: Male Location: Townsville Posted 20/09/12 08:24 AM Share Posted 20/09/12 08:24 AM I doubt there are many cases of cracking unless there was a dodgy batch! You are one of a few on here that use your car for track racing but I'd say that you must be the most regular on here at track days no? Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297787 Share on other sites More sharing options...
nelsonian101 Donating Members 961 Member For: 16y 11m 16d Gender: Male Location: Sydney Posted 20/09/12 09:31 AM Author Share Posted 20/09/12 09:31 AM On 20/09/2012 at 8:23 AM, ScatterBrain said: yeah I've seen cracks like that, obviously the rotors are getting way too hot. Are you running 6 or 4 pots on the front?4 pots.How do your PBR upgrades cope?Maybe I need AP's but also need a new diff too and don't want to spend the 2013 budget just yet! Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297810 Share on other sites More sharing options...
nelsonian101 Donating Members 961 Member For: 16y 11m 16d Gender: Male Location: Sydney Posted 20/09/12 09:32 AM Author Share Posted 20/09/12 09:32 AM On 20/09/2012 at 8:24 AM, bjc said: I doubt there are many cases of cracking unless there was a dodgy batch! You are one of a few on here that use your car for track racing but I'd say that you must be the most regular on here at track days no?Rosie, Scatterbrain and a few others have been doing track days for a few years too. Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297811 Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,332 Member For: 19y 8m 18d Gender: Male Location: Perth Posted 20/09/12 09:53 AM Share Posted 20/09/12 09:53 AM 1st set I've seen crack but that aint saying much because I dont track my car. I would get onto DBA( I reckon they would be quite keen to get there hand on a set that have cracked) they are supposed to be "club spec" so should handle club spec racing! Out of interest what is minimum thickness for them? Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297826 Share on other sites More sharing options...
Rosie Member 361 Member For: 18y 2m 2d Posted 20/09/12 10:09 AM Share Posted 20/09/12 10:09 AM On 20/09/2012 at 6:34 AM, nelsonian101 said: They had a very hard life with maybe 6 track days (on Michelin Slicks/ Project Mu Race pads) and about 30,000kms road driving but they died yesterday at Sydney Motorsport park. Down to about 30mm.I am usually VERY careful with cooldown laps (even drive out on the road for 5km at Wakefield) but the red flag came out late in the session too many times yesterday and didn't allow adequate cooldown.I usually dont hit the brakes in the pit garage (and leave handbrake off on rears), just coast the last metre but in neutral then put in park.Even use my idustrial fan on them sometimes too.Anyone else seen cracking like this?Had lots of quality Rotors do this!Just jam the biggest and fattest Hats and Rotors in there you can, if you're bashing the Track regularly. Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297836 Share on other sites More sharing options...
ScatterBrain Donating Members 316 Member For: 16y 8d Gender: Male Location: Brisbane Posted 20/09/12 11:52 AM Share Posted 20/09/12 11:52 AM On 20/09/2012 at 9:31 AM, nelsonian101 said: 4 pots.How do your PBR upgrades cope?Maybe I need AP's but also need a new diff too and don't want to spend the 2013 budget just yet! My PBR's are great I've never had any problems with them. Ap calipers are good but I've never liked the idea of not having dust boots around the pistons. On 20/09/2012 at 10:09 AM, Rosie said: Had lots of quality Rotors do this!Just jam the biggest and fattest Hats and Rotors in there you can, if you're bashing the Track regularly.It not just rotor size but pad size too, The more pad area you have the less concentrated the heat is. Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297909 Share on other sites More sharing options...
freeze_dk I am dissatisfied with my current employment situation Donating Members 8,610 Member For: 18y 8m 13d Gender: Male Posted 20/09/12 01:44 PM Share Posted 20/09/12 01:44 PM Check your thermographic temp marking to see if theyve changed color Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1297970 Share on other sites More sharing options...
nelsonian101 Donating Members 961 Member For: 16y 11m 16d Gender: Male Location: Sydney Posted 21/09/12 12:16 AM Author Share Posted 21/09/12 12:16 AM Minimum thickness is 30mm and they were right on it.Also maxed out the colour changes a long time ago. Asmentioned had done a lot of track days on these rotors.To clarify, I am still very happy with this product and I am definitely using them again.Just use my car to the limit and the particular circumstances in this instance (slicks, warm track, long circuit and sessions, minimum disc thickness, little cooldown, and Race only pads) forced them to die.Customer Service from DBA has been fantastic, and I still highly recommend their products. Link to comment https://www.fordxr6turbo.com/forum/topic/82010-cracked-my-355mm-dba5000-t3s/#findComment-1298081 Share on other sites More sharing options...
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