K Sport 8 Pot 356mm Brake kit
#31
Scooby Regular
iTrader: (22)
The grooves dont give an indication as to which way the vanes run as they differ across brands.
The grooves serve several purposes. They de-glaze the pads, dissipate heat on the disc surface and it provides a channel for the gases that the pad to disc friction creates. Without these grooves the gases get trapped between disc and pad and thus reduces braking efficiency.
Holed discs are good but wont last very long and crack will start to appear between the holes when used on a road car. Best bet for a road car is grooved discs without holes.
The grooves serve several purposes. They de-glaze the pads, dissipate heat on the disc surface and it provides a channel for the gases that the pad to disc friction creates. Without these grooves the gases get trapped between disc and pad and thus reduces braking efficiency.
Holed discs are good but wont last very long and crack will start to appear between the holes when used on a road car. Best bet for a road car is grooved discs without holes.
#32
Scooby Regular
iTrader: (33)
Join Date: Jul 2007
Location: E Yorks
Posts: 4,791
Likes: 0
Received 0 Likes
on
0 Posts
I'll say this once more. The vanes need to scoop hot air away from hubs not cold air in. If hot air is scooped away from the hubs that hot air is replaced by cold air. If you are scooping cold air in towards the hubs the hot air has nowhere to go and heats the "cold" air up.
Answers from people way more knowledgble than I'll ever be.
22B Bulletin Board: StopTech Calipers Which way up?
Answers from people way more knowledgble than I'll ever be.
22B Bulletin Board: StopTech Calipers Which way up?
#35
Scooby Regular
iTrader: (22)
I thought I'd post up for the benfit of those that don't have the stickers when the discs arrive.
The images below are the correct way to mount your discs for maximum brake cooling.
This is off side front.
The diagram below shows which way the vanes should be angled for maximum brake cooling efficiency.
Let me also clarify that your brakes will still work perfectly well if you have been unfortunate enough to mount them with the vanes the other way it's just they'll heat up more quicky (a benefit in the winter months) but they wont cool as well when on track or braking from high speed.
As said this isn't just me spouting off an un informed opinion I asked the same question last year when I bought a second hand pair of stop tech brakes. I was fortunate enough to be given the right answer from someone whos worked in the motorsport industry in a technical capacity for many years.
The images below are the correct way to mount your discs for maximum brake cooling.
This is off side front.
The diagram below shows which way the vanes should be angled for maximum brake cooling efficiency.
Let me also clarify that your brakes will still work perfectly well if you have been unfortunate enough to mount them with the vanes the other way it's just they'll heat up more quicky (a benefit in the winter months) but they wont cool as well when on track or braking from high speed.
As said this isn't just me spouting off an un informed opinion I asked the same question last year when I bought a second hand pair of stop tech brakes. I was fortunate enough to be given the right answer from someone whos worked in the motorsport industry in a technical capacity for many years.
#38
Scooby Regular
iTrader: (22)
I have no idea which way the vent vanes on the Ksports go in relation to the grooves on the outside friction surface of the disc and to be honest it doesn't matter. It's the orientation of the vanes that matters as the grooves can face which ever direction as they serve their purpose either way.
Have a look at the thread on 22b that I posted earlier. See John Felstead's reply among others. We all know John's excellent motorsport/technical background. I'm just going on what they've said and it makes perfect sense as hot air needs to be vented out to keep the discs and hubs cool. If all the vents are doing is sucking cold air in then that new cold air clashes with, and is heated up by, the heat coming off the hubs.
To be honest this is probably irrelivent for most people as the brakes will be excellent either way. They will however be more efficient and keep cooler (especially on track) if the vanes vent the heat generated by the hubs out.
This is also what AP racing suggest for their discs too.
http://www.apracing.com/info/info.as...ntification_41
Last edited by dazdavies; 17 December 2009 at 01:11 AM.
#40
Scooby Regular
Thread Starter
Join Date: Aug 2005
Location: 392/361 MY04 STi
Posts: 7,638
Likes: 0
Received 0 Likes
on
0 Posts
They're the 356mm ones.
I'm looking forward to getting them bedded in and comparing. I just need to check they're fitted right, as it seems they are catching, like minor ABS, not constant braking. Don't know if that's part of the bedding in or fitted wrong.
#41
Scooby Regular
Thread Starter
Join Date: Aug 2005
Location: 392/361 MY04 STi
Posts: 7,638
Likes: 0
Received 0 Likes
on
0 Posts
#42
Scooby Regular
Thread Starter
Join Date: Aug 2005
Location: 392/361 MY04 STi
Posts: 7,638
Likes: 0
Received 0 Likes
on
0 Posts
Now i just need to check the discs are not catching. Fun n' games.
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM
MightyArsenal
Wheels, Tyres & Brakes
6
25 September 2015 08:31 PM