biketeacherdave said:
So let's examine your original comment as its a bit self contradicting, your actually suggesting that they only fit drilled and crossed discs to proper sports cars but your saying their worse than standard discs ERM no their not.
Click to expand...

Again, you fail to 'examine' the comment correctly. It's not self contradicting - it's self explanatory. I'll try and break it down for you:

- Generally speaking a sports car (and I mean sports car, not the crappy euro trash) will be driven faster and harder than a 'normal' car or even a Rangerover.
- Driving faster and harder generally means you'll be braking harder to slow down for the corners.
- Lots of braking from higher speeds = more friction in between the pads and discs
- More friction = more heat
- With the correct pads and discs, more heat = better braking efficiency. (with you loving EBC, look at the 'yellow stuff' and 'red stuff' pads and their efficient operating temperatures - are they wrong too?)

So, just to surmise the points I made previously;

1) Drilled and grooved discs have less AREA to use for friction - by definition, they have metal 'missing' whereas standard discs do not.
2) Brake pads (especially from the likes of EBC) are designed to operate at their best at certain temperatures.
3) If your discs and pads aren't operating at their optimum temperatures (as specified by the manufacturers) then braking efficiency is diminished.

Edit:

Just to add, I'm only being purposely facetious and pedantic here because you suggested I have no idea what I'm talking about. I didn't question your choice or your personality or your technical abilities in my original post, I simply mentioned that drilled and grooved discs on a RangeRover was relatively pointless (i.e. had you spent more money on them it would have been a waste.. unless it was for aesthetics). I may be a new RR owner, asking questions that are specific to these cars (EAS, for example) but I'm more than capable and proficient when it comes to working on cars both high-powered and not. Ask me about my sillyfast OMGWTF Saab.
 
Last edited:
Hairy said:
Well not wrong with a bit of black paint on the old rusty calipers but it seems to offend you, so can only think you just do not look after you cars :eek:, well I like to look after my cars and don't want my RR looking like a shed :D, and wot is it with peeps keep banging on about Mcdonalds car parks then ehh, ive got two grown up lads and three grandkids, and I agree with wot you mean about cross drilled discs, but I still like the look of them.:p
Click to expand...

Shame on you then going to Mcdonalds car parks at your age. We all know that black caliper paint does not make the brakes better, it's the red stuff that does that. All i am saying is if you want to fit drilled and slotted discs for aesthetic reasons please do so, but don't expect the brakes to get better they won't.
 
Reducing unsprung weight is advantageous in the sports car world and you expect to be moving at speed enjoying a ready supply of cooling air. In the range rover world you might be getting the brake hot down a steep incline at low speed banking on the big chunky discs to withstand the heat without warping or cracking - only to be dunked into an ice cold stream at the bottom of the hill. This type of stress requires a different approach to sports cars. Will drilled and grooved discs pick up stones and grit?

It's your car and if you like your discs - great. But big 4x4s - ones actually indended to be used offroad - tend to have solid discs for a reason.
 
wammers said:
Shame on you then going to Mcdonalds car parks at your age. We all know that black caliper paint does not make the brakes better, it's the red stuff that does that. All i am saying is if you want to fit drilled and slotted discs for aesthetic reasons please do so, but don't expect the brakes to get better they won't.
Click to expand...

LOL, well I have to drive through the car park when i take the kids, :p did i say a bit of paint makes the breaks better, No I didn't, but it makes them look better, there in a state, all rusty, and I mean Rusty, and never said im putting cross drilled discs on, standard discs going on, just like the look of them that's all, but don't think your gona like the jet turbine engine that going in the boot.:D
 
Hairy said:
LOL, well I have to drive through the car park when i take the kids, :p did i say a bit of paint makes the breaks better, No I didn't, but it makes them look better, there in a state, all rusty, and I mean Rusty, and never said im putting cross drilled discs on, standard discs going on, just like the look of them that's all, but don't think your gona like the jet turbine engine that going in the boot.:D
Click to expand...

Wammers will love it, he knows about things aviation based.:D:D
 
domino said:
Again, you fail to 'examine' the comment correctly. It's not self contradicting - it's self explanatory. I'll try and break it down for you:

- Generally speaking a sports car (and I mean sports car, not the crappy euro trash) will be driven faster and harder than a 'normal' car or even a Rangerover.
- Driving faster and harder generally means you'll be braking harder to slow down for the corners.
- Lots of braking from higher speeds = more friction in between the pads and discs
- More friction = more heat
- With the correct pads and discs, more heat = better braking efficiency. (with you loving EBC, look at the 'yellow stuff' and 'red stuff' pads and their efficient operating temperatures - are they wrong too?)

So, just to surmise the points I made previously;

1) Drilled and grooved discs have less AREA to use for friction - by definition, they have metal 'missing' whereas standard discs do not.
2) Brake pads (especially from the likes of EBC) are designed to operate at their best at certain temperatures.
3) If your discs and pads aren't operating at their optimum temperatures (as specified by the manufacturers) then braking efficiency is diminished.

Edit:

Just to add, I'm only being purposely facetious and pedantic here because you suggested I have no idea what I'm talking about. I didn't question your choice or your personality or your technical abilities in my original post, I simply mentioned that drilled and grooved discs on a RangeRover was relatively pointless (i.e. had you spent more money on them it would have been a waste.. unless it was for aesthetics). I may be a new RR owner, asking questions that are specific to these cars (EAS, for example) but I'm more than capable and proficient when it comes to working on cars both high-powered and not. Ask me about my sillyfast OMGWTF Saab.
Click to expand...



Hahaha that is all I have to say going now to find this McDonalds car park were wammers hangs out
 
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