The Motor Forum

Dr. Hfuhruhurr · Posted: Fri Feb 20, 2009 8:53 am Post subject:

What's the advantage of them not being round?

"him" · Posted: Fri Feb 20, 2009 10:25 am Post subject:

GonnaBreakABuggy · Posted: Fri Feb 20, 2009 7:22 pm Post subject:

Well, they can deglaze the pads, although modern pads don't suffer as much these days from glazing anyway.
Weight is the main advantage - the standard discs weigh 7.4kg each, these weigh 2.95kg each, big saving of unsprung and rotational weight.
Even though the mass and braking area of the disc is reduced, the extra pressure from the reduced contact area isn't a big worry, as brake pads are specifically designed to be insensitive to pressure changes, otherwise you're brakes would be unpredictable.
So there's not as big a problem as it first appears;

Firstly, the interrupted cut on the pads allows air to be pumped across their surface, so the pad temperature remains similar to a standard disc, even though the peak disc temperature will be higher.

Secondly, the alloy bells in the centre transmit heat away from the disc to the alloys far faster to offset some of the mass loss.

Thirdly, the discs can now pump far more air through their internal vanes, so cooling is increased there too.

If you look at the shape of the disc, a lot of weight is lost from the inside which is unswept anyway, and the shape is designed so it actually moves the effective braking radius outwards slighty.
Anyway, the shape of them means the full surface area of the pad is still swept, but with an interupted cut
They don't suffer from hydroplaning after hitting standing water like a plain disc can either.

The discs and pads wear faster but I can live with that.

Blarno · Posted: Wed Feb 25, 2009 1:42 pm Post subject:

Some new weight-saving measures...
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Arms held out, in the Jesus Christ Pose.

"him" · Posted: Wed Feb 25, 2009 1:45 pm Post subject:

They should be on the other side to counteract the mass of the driver...
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Remember - A gym without chalk is a heath spa...

Dr. Hfuhruhurr · Posted: Wed Feb 25, 2009 2:05 pm Post subject:

That Bentley Supersports would need rather more than that ...

"him" · Posted: Wed Feb 25, 2009 2:17 pm Post subject:

Jasper · Posted: Sun Mar 08, 2009 12:51 am Post subject:

I had the bucket and sponge out today and I have to say, the Bora is in great condition for a car in it's tenth year.

And a couple of the Golf

Don't worry about the dinked wing. Look at the size of my foot!

TimR · Posted: Sun Mar 08, 2009 10:28 am Post subject:

Are you going to replace the Golf with a Renault 5 at some point?

The Bora looks to be in better nick than the Golf

Martin · Posted: Sun Mar 08, 2009 10:38 am Post subject:

The Bora looks great, I loved mine and can't believe it's 10 years since I got it!
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Matt · Posted: Mon Mar 09, 2009 10:30 pm Post subject:

Had a chance to snap both cars properly today

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Small car, big heart.

Jasper · Posted: Tue Mar 10, 2009 2:13 pm Post subject:

Wow. Great shots. Matt.
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Matt · Posted: Tue Mar 10, 2009 6:44 pm Post subject:

Couldn't help but get fiddling today! The V-grille came off quite easily with only one broken clip :D

The body shop looked at the mirror today and will be sending me the repair quote (Some little shits had kicked it during the night a few weeks back

). I've still got the cover, so they'll re-use that one.
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Small car, big heart.

Boxer6 · Posted: Sat Mar 21, 2009 5:53 pm Post subject:

Just a few gratuitous Leggy shots - mostly, because it's clean!!

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Just keepin' on keeping on.

Dr. Hfuhruhurr · Posted: Mon Mar 23, 2009 9:41 am Post subject:

Those alloys are really smart. And also first-hand evidence that Subaru can make an attractive car when they put their mind to it.

Blarno · Posted: Mon Mar 23, 2009 2:05 pm Post subject:

I've said it before and I'll say it again, the Legacy is the best looking estate car on sale.
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Arms held out, in the Jesus Christ Pose.

SpecB · Posted: Wed Mar 25, 2009 5:59 pm Post subject:

Just for you Blarno - more Leggy porn.

It got a t-cut last week so I sealed it today.
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Mark

Dr. Hfuhruhurr · Posted: Wed Mar 25, 2009 6:09 pm Post subject:

What's the significance of the pattern of circular indentations on the right of the trim strip (above the "LEGACY" badge)?

Blarno · Posted: Wed Mar 25, 2009 6:10 pm Post subject:

SpecB · Posted: Wed Mar 25, 2009 6:14 pm Post subject:

Actually, the rear fog is LED and the one on the left is the reversing light.
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Mark

Blarno · Posted: Wed Mar 25, 2009 6:17 pm Post subject:

Ah right, never seen an LED foglight before.
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Arms held out, in the Jesus Christ Pose.

SpecB · Posted: Wed Mar 25, 2009 9:14 pm Post subject:

You can get aftermarket LED rear light clusters as well but they are a fortune.
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Mark

"him" · Posted: Thu Mar 26, 2009 5:46 pm Post subject:

SpecB · Posted: Thu Mar 26, 2009 6:08 pm Post subject:

I omitted to say that they are nasty as well.

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Mark

Blarno · Posted: Thu Mar 26, 2009 6:11 pm Post subject:

The Clio ones aren't too bad. The only difference is that the side/brakelight lens is clear and not red.

I'm investing in some strip LEDS pretty soon and I'm going to butcher my old cracked rear light to see if I can retro fit LED side, brake, indicator and reverse lights.
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Arms held out, in the Jesus Christ Pose.

Jasper · Posted: Thu Mar 26, 2009 6:13 pm Post subject:

I noticed the new Honda Jazz has them fitted.

Not really something all the local Grannies would wont on their cars I would have thought.

I'm very impressed that your Black car looks so shiny and clean, SpecB. I'll wait until it's dark before going near the Golf.
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Big TC · Posted: Fri Mar 27, 2009 11:58 am Post subject:

Pkh72 · Posted: Sun Mar 29, 2009 3:28 pm Post subject:

Some piccies from my journey back to the midlands from Llan Festiniog earlier today, the last 3 pictures were taken on the B4407, everybody needs to try it at least once.

The ST was built for these roads - narrow, twisty & bouncy with lots of sharp corners.

gonnabuildabuggy · Posted: Sun Mar 29, 2009 11:37 pm Post subject:

Seeing as I've got Photobucket open a few pics of the Golf from before. 328 and FRV to follow another day.

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Aint no substitute for cubic inches.

Jasper · Posted: Mon Mar 30, 2009 1:47 pm Post subject:

Stop it, you big tease!
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LittleSwill · Posted: Mon Mar 30, 2009 7:38 pm Post subject:

I thought it was part of a clutch!

I did think making your own clutch a bit ott.
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the old man · Posted: Tue Mar 31, 2009 12:32 am Post subject:

Blarno · Posted: Sun Apr 05, 2009 11:40 am Post subject:

I'm officially without car for at least 2 weeks, as this was the sight that greeted me when I removed the front brakes earlier on:

^^This one's stuck until I can get a drill. The bloody stupid retaining screw is stuck solid and rounded off. I don't understand why retaining screws are needed, the wheel holds the disc in place. It's not like it's going to fall off, is it?

I knew they were getting bad, but I wasn't expecting broken pads!
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Arms held out, in the Jesus Christ Pose.

GonnaBreakABuggy · Posted: Sun Apr 05, 2009 12:30 pm Post subject:

Stop them falling off on the assembly line.

I think those were a little past due!
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*Innocent Whistle*

SpecB · Posted: Sun Apr 05, 2009 1:13 pm Post subject:

Bloody hell. No wonder you were having problems stopping!
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Mark

Blarno · Posted: Sun Apr 05, 2009 2:43 pm Post subject:

The funny thing is that the brakes have felt brilliant for ages, even on the Evo Triangle. I just thought they were fading because I'd been braking hard on the downhill sections so I could turn round for another drive-by.

They were squeaking like buggery on Friday on the way home from my exhaust check. One look at the state of them this morning was enough to make me decide to decomission the car until they get replaced. There's no way I'd contemplate carrying on driving with just me in the car, let alone carrying the Missus and little 'un.

I'm now rolling around in a 1997 Astra 1.6 Arctic Estate that belongs to my Stepdad. Not a bad motor, if I must say.
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Arms held out, in the Jesus Christ Pose.

Blarno · Posted: Wed Apr 15, 2009 8:51 pm Post subject:

Blue Beastie has had a name change:

Introducing....Blue Frog.

Why? Dunno, just felt like it.
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Arms held out, in the Jesus Christ Pose.

DaveGibson · Posted: Wed Apr 15, 2009 11:06 pm Post subject:

Blarno · Posted: Sun Apr 19, 2009 2:16 pm Post subject:

Picked up my new brakes today and...............they've sent the wrong sized discs. Looks like they missed a letter out on the order pick and they've sent 255mm discs for an Astra Van. The pads are right, though. Mintex, too.

Who knows how long this is going to take to sort out...
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Arms held out, in the Jesus Christ Pose.

Matt · Posted: Sun Apr 19, 2009 3:02 pm Post subject:

Blarno · Posted: Sun Apr 19, 2009 3:04 pm Post subject:

Bastards. It's just childish jealousy. They don't have a licence or a car so they damage other people's.
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Arms held out, in the Jesus Christ Pose.

Blarno · Posted: Wed Apr 22, 2009 3:39 pm Post subject:

Well, they've sent the right discs this time, just need to buy a couple of HSS drills to get the old disc off and Blue Frog is back in business.

Just in time for payday and a full tank of V-Power, because I feel like it.

Happy days.
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Arms held out, in the Jesus Christ Pose.

Blarno · Posted: Thu Apr 23, 2009 4:08 pm Post subject:

Mmmm, shiny!

I'm keeping the calipers matt black from now on.

Now I just need to bolt up the pesky ARB bushes and it's driveable again.
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Arms held out, in the Jesus Christ Pose.

GonnaBreakABuggy · Posted: Wed May 06, 2009 1:00 am Post subject:

Mmm shiny:

Work in progress...
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*Innocent Whistle*

Matt · Posted: Fri May 22, 2009 12:26 am Post subject:

The advantage of having a sunroof if you like to take photos!

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Small car, big heart.

Blarno · Posted: Fri May 22, 2009 7:28 am Post subject:

^^^^ I like that!
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Arms held out, in the Jesus Christ Pose.

Jasper · Posted: Mon Jun 01, 2009 5:12 pm Post subject:

Nice photo Matt.

The Bora has it's first clean of the year on Saturday.

The 4motion spoiler, lower suspension and fatter tyre help beef up the front a bit

Chav enough for you TimR?

Matt · Posted: Mon Jun 01, 2009 6:41 pm Post subject:

That's looking lovely.
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Small car, big heart.

TimR · Posted: Mon Jun 01, 2009 6:44 pm Post subject:

Star69 · Posted: Mon Jun 01, 2009 9:24 pm Post subject:

Those new wheels on there Jasper? Not the Skoda ones are they, suppose you've got to have some privileges working for the manufacturer...

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