How is this even remotely safe?

[Moar]

I'm missing something here..

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&am...

NOTE - DISCS ARE ORIGINAL BREMBO DISCS

THE PERFORMANCE TOUCH IS TAILORED BY OUR APPROVED ENGINEERING WORKSHOP

So essentially this guy takes standard brembo discs, gets a fricken god knows what and cuts out grooves onto the discs...

[grim_d]

I don't know a whole lot about the engineering aspects of something like that but as long as it has been done properly, such as on a cnc mill, and has not been cut beyond the minimum safe thickness of the disc then it can't be that bad can it?

[Moar]

Thats the whole point though, you can trust Brembo themselves to get it safe and right, you can trust EBC etc etc, but can you really trust some person in a warehouse in Dewsbury?

And if he doesn't get it right then surely you're playing with lives..

[grim_d]

Surely manufacturers like Brembo and EBC just cut grooves from solid discs when they make discs grooved though?

Like I said I don't know about how the grooves affect a disc that was solid to begin with but it doesn't look like its been done by a monkey with a grinder.

I'm not sure I would buy them but I'm fairly confident they wouldn't explode violently and kill everybody.

Edited by grim_d on Thursday 19th May 01:11

[defblade]

The seller is a gallant hero of eugenics.

Or a researcher for the Darwin Awards.

Either way, proper grooved discs from people you've heard of are usually about the same sort of price (or less).

[Bill]

They will also zinc plate them

I suspect Brembo would be very interested in this.

[anonymous-user]

Moar said:

Thats the whole point though, you can trust Brembo themselves to get it safe and right, you can trust EBC etc etc, but can you really trust some person in a warehouse in Dewsbury?

And if he doesn't get it right then surely you're playing with lives..

You've not owned any EBC drilled/grooved discs have you?

[300bhp/ton]

Moar said:

Thats the whole point though, you can trust Brembo themselves to get it safe and right, you can trust EBC etc etc, but can you really trust some person in a warehouse in Dewsbury?

And if he doesn't get it right then surely you're playing with lives..

So, don't buy them.

And playing with lives is somewhat an extreme, UNFOUNDED and if honest ridiculous claim. That is, unless you have some evidence to the contrary?

[Huntsman]

I dont believe they do that machining in house, it wouldn't be worth the bother, cost of owning and running and CNC machine, add on the cost of the disc...

[300bhp/ton]

Dave_ST220 said:

You've not owned any EBC drilled/grooved discs have you?

Nobody has, as they aren't drilled

[The Black Flash]

300bhp/ton said:

So, don't buy them.

And playing with lives is somewhat an extreme, UNFOUNDED and if honest ridiculous claim. That is, unless you have some evidence to the contrary?

Indeed, it's only machining a brake disc - hardly something complicated for someone with a cnc mill.

[anonymous-user]

300bhp/ton said:

Dave_ST220 said:

You've not owned any EBC drilled/grooved discs have you?

Nobody has, as they aren't drilled

Must have been fake then!

[Pints]

Huntsman said:

I dont believe they do that machining in house, it wouldn't be worth the bother, cost of owning and running and CNC machine, add on the cost of the disc...

The cost of the disc is not included at the quoted price AFAICT.

[900T-R]

I believe Trent Saab/TSL did this before they got out of the Saab business and concentrated on Scoobies, their reosning being that the Brembo discs are of very high quality, high carbon grey cast iron and there were no grooved (Brembo Max et al) Brembos for the applications they needed.

Although I got plain discs with my Ferodo DS3000 pads as that was what they worked best on according to Graham...

(This was all around the turn of the century BTW).

[300bhp/ton]

Dave_ST220 said:

Must have been fake then!

Apologies. Was getting mixed up with cross drilled... which is what they don't sell.

[R26Andy]

An OEM manufacturer would carry out various calculations, finite element analysis and testing on grooved or drilled discs and if neccesary adjust the manufacturing process, materials and dimensions of the work piece so that they may/may not be different to the standard discs they produce.

The simple fact is nobody knows what modifications the OEM manufacturer has done/would need to do to make them safe and therefore unless this place in dewsbury has its own engineers and testing then the only thing I would fit them to is the bin.

Regards

Andy

[Moar]

Dave_ST220 said:

You've not owned any EBC drilled/grooved discs have you?

First manufacturer that came to my head for some reason. Lets switch EBC to Blackdiamond then or Ferrodo. You get the idea though, you would trust a mainstream manufacturer to do the grooves, not a guy in a shed.

[Moar]

doogz said:

Hmm..

How are grooved discs like that normally made? Cast with the grooves in, or machined afterwards

I'm not a big fan, all of these edges and angles attract stress concentrations and heat. If it's been done properly by someone that's spent some time testing and analysing the heat and stress build up in the disc, fair enough, but as has been said, not so keen when it's been done by some guy in his shed.

I always believed that the drilled ones were made like that. Holes in the cast etc.

Has anyone heard of CRN performance?

[Riley Blue]

300bhp/ton said:

Dave_ST220 said:

You've not owned any EBC drilled/grooved discs have you?

Nobody has, as they aren't drilled

But they are warped - in my experience at least

[Moar]

doogz said:

Yeah, you wouldn't drill them afterwards, that's just asking for trouble, but what about the grooved ones?

I'd assume that the grooved ones are in fact CNC machined tbh.

Is there anyone here who works in the industry?