cancel that question as ive just fully read oze30's postfuzzy wrote:yes it does make sense but how would the unsprung mass of the wheel and brakes adversly effect the handling. as long as both sides are the same then its all balanced?maxfield wrote:Sprung mass is everything that's supported by the suspension. Unsprung mass is everything connected to the suspension rather than supported by it, I.E brakes wheels etc. That make sense?
Will these suit my M3?. Opinions please.
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fuzzy
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gareth
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i think they look fantastic and really suit the car (hard with a E30)
one thing to note with caliper clearance: sliding calipers get closer to the wheel when they have new pads fitted.
one thing to note with caliper clearance: sliding calipers get closer to the wheel when they have new pads fitted.
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LSD rebuilding / modification services provided, PM for details

LSD rebuilding / modification services provided, PM for details
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Rosc0PColtrane
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My pics. I should charge for reproduction. Even if they were n00b pics when I took them!gazza325cab wrote:Thanks Gents.
Indeed they look class.
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Demlotcrew
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Rosc0PColtrane
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It takes more energy to stop or change direction on a heavier rotational force.fuzzy wrote:yes it does make sense but how would the unsprung mass of the wheel and brakes adversly effect the handling. as long as both sides are the same then its all balanced?maxfield wrote:Sprung mass is everything that's supported by the suspension. Unsprung mass is everything connected to the suspension rather than supported by it, I.E brakes wheels etc. That make sense?
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Demlotcrew
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Gyroscope anyone?
Erm.. What's a gyro scope got to do with anything? Yes, both are rotating same direction and ultimately the same speed, so the gyroscopic effect is negligable.Plus, they are connected by a tie rod to each other, so the chances of both sides pointing in different directions is negligable unless you have some major probs with your steering! Remember, we're talking about unsprung mass. The more weight you have the slower the wheel is to respond.Demlotcrew wrote:Gyroscope anyone?
Gyroscopic effect hasmore to do with a single wheel as it will always try to remain upright (or in whichever start position you rotate it in. (hence motor bikes using the leaning effect to turn as opposed to a steering effect. Look at a slow motion video of a motorbike at speed, turning into a corner. you will notice the front wheel turn against the turn slightly before being forced around by the weight of the bike and geometry of the forks/suspension setup.
Rotational mass and the force required to retard the mass is the point in question. The bigger the mass in respect to wight as well, the more energy is required to retard the rotational force, thus more friction required = more heat. (as Rosco said).
Less rotational mass + weight means less friction, easier on the brakes.
Think trying to stop your bike wheel with your hand vs a car wheel at the same speed and stopping it with your hand. Which one is going to:
a) hurt more
b) be easier to stop and
c) less likely to rip your hand off if you grab the thing?
The bike wheel. Less Mass/weight.
ever heard of ackerman angle?
geometry built into the front suspension so the front wheels turn different amounts for a certain amount of lock. obviously the inside wheel has to be turned more as it has to go around a tighter curve than the outside one, therefore you're upseting the 'balanced gyroscope' every time a wheel goes over a bump, or turns even a fraction.
one of the main reasons why cars with heavy wheels and low profile tyres tend to tramline like a bastard and have all sorts of steering feel wierdness going on.
that asside, i quite like the look of the rondels, and was considering getting a set of the 17in versions for my m3. then i realised what a tit i was being and bought some style 5s instead. i can't believe anyone would change from style 5s to rondels

geometry built into the front suspension so the front wheels turn different amounts for a certain amount of lock. obviously the inside wheel has to be turned more as it has to go around a tighter curve than the outside one, therefore you're upseting the 'balanced gyroscope' every time a wheel goes over a bump, or turns even a fraction.
one of the main reasons why cars with heavy wheels and low profile tyres tend to tramline like a bastard and have all sorts of steering feel wierdness going on.
that asside, i quite like the look of the rondels, and was considering getting a set of the 17in versions for my m3. then i realised what a tit i was being and bought some style 5s instead. i can't believe anyone would change from style 5s to rondels
cheers,
harry
harry
True to an extent, but the ackerman has no effect in a straight line.harry_p wrote:ever heard of ackerman angle?
geometry built into the front suspension so the front wheels turn different amounts for a certain amount of lock. obviously the inside wheel has to be turned more as it has to go around a tighter curve than the outside one, therefore you're upseting the 'balanced gyroscope' every time a wheel goes over a bump, or turns even a fraction.
one of the main reasons why cars with heavy wheels and low profile tyres tend to tramline like a bastard and have all sorts of steering feel wierdness going on.
that asside, i quite like the look of the rondels, and was considering getting a set of the 17in versions for my m3. then i realised what a tit i was being and bought some style 5s instead. i can't believe anyone would change from style 5s to rondels![]()
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pacerpete
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gazza325cab wrote:How rude considering the poverty spec, flintstone vehicle at the podpacerpete wrote:They will match your tail lights if nothing else !
Next time i will bring another of my 'woody' jeeps for you peasants to check out ! (i have 3
I would have brought my 63000 km macau evo 2 to the pod but i didn't want to upset all of you who own 'ordinary' M3's !
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Ziggy
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I bet someone, somewhere has tried this; Shaken the bottle up & down, & then tried to pour the milk into their hand to shake it up & down without the bottle! Sorry, just amused me...oze30 wrote: Hold a 2 litre bottle of milk in your hand and try to shake it up and down as fast as you can. Now try it without the bottle. Which one can you do faster?
E30 in need of wiring loom smoke since April '11...
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Chris-W
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I bet someone's manage to infer self-abuse to a passer-by during the second stage of the test.Ziggy wrote:I bet someone, somewhere has tried this; Shaken the bottle up & down, & then tried to pour the milk into their hand to shake it up & down without the bottle! Sorry, just amused me...oze30 wrote: Hold a 2 litre bottle of milk in your hand and try to shake it up and down as fast as you can. Now try it without the bottle. Which one can you do faster?
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Bob_S
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all this talk of bbs copy rims is making me feel dirty.... I feel the need for a pic of a real bbs wheel again!
http://www.bmwpower.hu/gallery/albums/u ... 06%7E5.jpg
http://www.bmwpower.hu/gallery/albums/u ... 06%7E5.jpg
Bollocks to this 24v scrap!












