mossy7 Posted May 26, 2017 Share Posted May 26, 2017 Has anyone tried these discs? They appear to be the correct size and figment to replace the standard discs. Link to comment Share on other sites More sharing options...
Edzup Ezzer Posted May 26, 2017 Share Posted May 26, 2017 True ventilated discs have radial cavities within the core of the rotor to allow air to cool the discs internally. Cross drilled discs without the internal cavities I described are largely a cosmetic ploy to make the discs look ‘better’, and probably increase pad wear and the grooves would be even worse for pad life, so all things considered I doubt these are worth the trip.Ezzer Link to comment Share on other sites More sharing options...
SM25T Posted May 26, 2017 Share Posted May 26, 2017 Second that .... hungry for pads. Link to comment Share on other sites More sharing options...
elie boone Posted May 26, 2017 Share Posted May 26, 2017 They don't really eat pads, the grooves are there for an escape of hot gasses of the friction material while being hard on the braking. So unless you do some track time it's of no benefit. Link to comment Share on other sites More sharing options...
andy couchman Posted May 26, 2017 Share Posted May 26, 2017 Cross-drilling also saves weight and these have radial grooves too. Is that better/worse? Certainly, cross drilling makes the brakes noisier.Was always under the impression that true ventilated discs tend to be very heavy and add width, neither of which you want or need on a 7 (due to our low weight and good cooling for the discs). But not an expert so happy to be corrected!Andy Link to comment Share on other sites More sharing options...
elie boone Posted May 27, 2017 Share Posted May 27, 2017 You can do Spa in a 220 hp VX with solid disc's no problem but a short circuit like Croix en Ternois anything above 150 hp will see you struggling with solid rotors. To lower the rotational weight by a little bit you can go for Hi-spec rotors with an alloy bell. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 27, 2017 Member Share Posted May 27, 2017 ... the grooves are there for an escape of hot gasses of the friction material while being hard on the braking.More please: is that from the pads themselves or the local air?Jonathan Link to comment Share on other sites More sharing options...
mossy7 Posted May 27, 2017 Author Share Posted May 27, 2017 Thanks for the comments folks. Elie, that's really interesting and helpful.As it happens I took mine out yesterday and found a quiet, long well sighted bit of road and tried braking as hard as I could with no one in sight and found I could brake a heck of a lot harder than I thought I could with no hint of locking up. Seems the standard discs, ( with Mintex 144 ) is perfectly good enough for me. Just need to stop being a tart about how the discs look and I'll be fine!! Link to comment Share on other sites More sharing options...
elie boone Posted May 27, 2017 Share Posted May 27, 2017 Here is some explanation about grooves, if you have drilled discs you need to keep an eye out for cracks around the holes, if the crack goes from one hole to another then you need to replace the disc.http://www.quora.com/Why-are-there-grooves-on-disc-brakes And if you want discs with grooves onlyhttp://www.reddotracing.co.uk/discs.asp Link to comment Share on other sites More sharing options...
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