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Old May 2nd, 2003, 05:28 PM   #1
Boo
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Cool Suspension Upgrades - Part 1 (Using Aus suspension specialist)

Ok, just got the car back from Whiteline today with the first stage of upgrades done...

This is what they have found out thus far....
NB: All changes were tested before and after with a special device to measure the g-forces and cornering speed with both DSC on and off..

* The number on cheapest upgrade to get you car handling better is get the bloody wheels aligned properly It turned out that my S's wheels have quite a bit of "toe in" on the back wheels and one had twice that of the other. The front wheels were also not good, but not as bad as the back..

>>Whitelines Tip: Always take you new car in to make sure the wheels are properly aligned

* After neutralising the cars alignment, they wacked a new 20mm adjustable sway bar on the back and a stiffer one (i gather as it is the same diameter as the original)... The result is very nice.. In fact, i am very keen to get on the track to give it some stick It has resulted in the rear of the car staying much flatter in the corners and seems to make a big difference to the turn in of the front end(early days yet, test driving to QLD over the next couple of days )
G-force testing seems to show that the car has now moved from understeer to neutral and the ability to force a fraction of oversteer.

I thought i would give you guys a taste of what is happening, we really need to get the car on the track to verify but the difference with just sway bars and alignment is very noticable

and better

Will update you some more when i get some more miles and corners on it

The original SWORKS

Last edited by Boo : May 2nd, 2003 at 05:46 PM.
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Old May 2nd, 2003, 05:41 PM   #2 (permalink)
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A side note....
The guys at Whiteline made comments on two things specifically...

1.They were super impressed by how well engineered the car is. They said that they rarely see a new car these days that compared with the quality BMW have used in the chassis of this car.
2.The g-force testing showed that DSC is an exceptional piece of technology and there is no way that you could match the g-forces once you provoked the car in corners when it is off, no matter what you do to the suspension..
However, with better suspension you can get controlled cornering speed and the DSC hopefully won't be used as much. The problem on the track is that you can't get the power down when you provoke the car on purpose as the DSC cuts the power delivered to the front wheels.

Again, more testing required Darn, that means more time at the track

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Old May 2nd, 2003, 06:40 PM   #3 (permalink)
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Hi,

Thanks for the info Boo. I'm looking forward to seeing the car on the track to see the difference.

What did they say about camber? My impression is the car needs a lot more negative camber, especially on the front. My track tyres (rear and front) are completely wasted on the outside, but clean on the inside. My street tyres however are wearing evenly.

You make an interesting point about DSC and the effects of modifications. Ideally if you improve the grip and traction of the car, then DSC should become less intrusive, ie it only comes into play when you lose traction, and hopefully this should be less often. I certainly noticed this in my BMW going from street to track tyres.

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Old May 2nd, 2003, 07:16 PM   #4 (permalink)
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Hi Again,

I thought it is worth making the point :

The mini has absolutely fantastic STOCK suspension. That is one of the main reasons many of us bought the car! For 99% of owners there is absolutely no point changing the suspension. I honestly believe there is no current car for anywhere near the price that has as good handling characteristics or as well sorted chassis. For most people there is no point modifying it. You can have so much fun on the road, without ever stretching the limits of the stock suspension. When I first did a track day in the mini the instructors were blown away by how well the car handled completely stock.

Why would you change it?

For some people it is looks, ie they like a lower car. Go for it! You wont be concerned by camber, caster, toe in, lap times or G-tech readings.

If you are really interested in performance then look at priorities.

For me personally in order my priorities are / were :

1) Driver education : doing driver training schools, club meets etc will improve your times much more than anything else. It will also make you a better and safer driver
2) Safety : harness, fire-extinguisher, helmet etc
3) Tyres : this is by far the biggest gain you can make in perfomance and times.
4) Brakes : it is worth remembering that the faster you go, the harder it is to stop, something that is often forgotten by "street" modders
5) Hard core stuff : this is for people who are competing in timed events, and want to save fractions of a second. Now we are talking about suspension, engine modications, stripping weight out of the car, tyre compounds etc. This is not for everbody, and you have to remember you are probably turning the car into something that is difficult to drive everyday. Also, you are getting into the realm of diminishing returns.

To put it into perspective it is worth remembering that the faster you become, it becomes exponentially harder (and more expensive) to make it faster.

Having said that, I am looking forward to seeing Boo's car in action, and learning from his experience. Once you have been bitten by the "track bug" it is highly dangerous. No doubt I will be saving up my money to do everything I can to the suspension!

Robbo
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Old May 2nd, 2003, 07:43 PM   #5 (permalink)
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Agree with everything you've said.. as they said, they are impressed... The strength of the chassis is way better than a WRX and in fact most bigger cars, so they say..

They have taken all the necessary measurements and will be building camber adjustment plates, springs and custom coilovers next.. Springs and camber adjustments are next and should be on by the end of the month ready for testing...
Definitely more camber on the front apparently..

They are doing all this development so they can export for the world market as they already export a lot of suspension kits for WRX, 200SX etc.. so they are pretty serious about their stuff.. They specialise in us clubbies who like to track our road registered cars therefore build in lots of adjustability

The original SWORKS
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Old May 2nd, 2003, 08:48 PM   #6 (permalink)
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Re: Suspension Upgrades - Part 1 (Using Aus suspension specialist)

Quote:
Originally posted by Boo
* The number on cheapest upgrade to get you car handling better is get the bloody wheels aligned properly It turned out that my S's wheels have quite a bit of "toe in" on the back wheels and one had twice that of the other. The front wheels were also not good, but not as bad as the back..

>>Whitelines Tip: Always take you new car in to make sure the wheels are properly aligned

Why, oh why won't anyone listen to me??

Always take your new car in for a wheel alignment before 1000k, or after the dealers do any suspension work. Surely with $400 tyres, you'd be crazy not to It has just cost Snoopy two front tyres

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Old May 2nd, 2003, 09:23 PM   #7 (permalink)
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Here is vindication(??spelling) for you!!

Also, my Mini weighed in at 1280kg

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Old May 3rd, 2003, 10:22 AM   #8 (permalink)
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Quote:
Originally posted by Boo

Also, my Mini weighed in at 1280kg

Hmm, It would be interesting to weigh one that was sans Sunroof and 17"s. Looks like their base weight of 1140 is pretty accurate.

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Old May 5th, 2003, 06:46 AM   #9 (permalink)
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Re: Re: Suspension Upgrades - Part 1 (Using Aus suspension specialist)

Quote:
Originally posted by swamos
Why, oh why won't anyone listen to me??

Always take your new car in for a wheel alignment before 1000k, or after the dealers do any suspension work. Surely with $400 tyres, you'd be crazy not to It has just cost Snoopy two front tyres

Can't agree more. Also be careful who you use. Found that the tyre centre used by my dealer is hopeless. Had what I thought was the "Left Pull" problem, turns out I had half a degree of toe OUT on the front (found once I took it to someone who knew what they were doing).

As for why you'd mod such a stunning suspension package, all I can say is that after the mods my new suspension makes SS+ feel soft and floaty! (Heaps more turn in and mid corner grip too!)
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Old May 5th, 2003, 09:44 AM   #10 (permalink)
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Thanks for the info Boo.

I must say that a wheel alignment is a good idea even though the car is new. What sought of measurements are we talking about though for the alignment? or should the technician know what he is doing to balance the car out?

Cheers

Nick

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Old May 5th, 2003, 06:27 PM   #11 (permalink)
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My suspension guys set them all to neutral at this point till we sort out what suspension set up is best. I'm no expert so am probably not the one to say what it should be..

The original SWORKS
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Old May 6th, 2003, 09:01 AM   #12 (permalink)
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I had my dealer align my wheels - I hope they did it properly as I never saw any of those results printouts...

Is it just me, or does everyone agree that the runflat tyres (I have 17" Pirelli Eufori) are a HUGE letdown in the car's performance??

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Old May 6th, 2003, 10:05 AM   #13 (permalink)
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I had another wheel alignment done this morning in preparation for my big trip next week. The first alignment at 1000k was when they noted that the back plate that adjusts the toe was loose.

The one this morning was at 10500k, and we found that the rear was toed in 5.8mm , and the front toed out 3.1mm

The specialist has set them to about 2.5mm to 3mm toe in, which allows for a 0 - 0 setup (or nearly anyway) when the car is loaded. The guys who sis it suggested that the movemnet is probably because the car is still settling down, and have recommended another check at 20k. If it isn't stable by then, we'll start worrying.

With $1600 of rubber, a $66 4 wheel alignment is cheap It better have another tyre rotation before it goes away too

I might post all the details (both reports) in another thread in an appropriate area tonight.

Clubman less....
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Old May 6th, 2003, 10:49 AM   #14 (permalink)
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Can anyone in Melbourne recommend a suspension specialist
that would know what they're doing, or is Bob Jane ok?

Regards, ElTel
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Old May 6th, 2003, 04:45 PM   #15 (permalink)
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Hi,

IML337 said :

"Is it just me, or does everyone agree that the runflat tyres (I have 17" Pirelli Eufori) are a HUGE letdown in the car's performance??"

I have to agree!!

The tyres are the biggest dissappointment for me with the car. As soon as they are worn out I will be putting on a set of non-run flat performance tyres.

In my opinion with the run flats you are paying a premium as well as compromising ride and performance.

Robbo
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Old May 6th, 2003, 05:27 PM   #16 (permalink)
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Quote:
Originally posted by robbo mcs
I have to agree!!

The tyres are the biggest dissappointment for me with the car. As soon as they are worn out I will be putting on a set of non-run flat performance tyres.

In my opinion with the run flats you are paying a premium as well as compromising ride and performance.

Robbo

cool - so I'm not kidding myself then. And there's NO WAY I'll be buying runflats again either, for the exact same reasons. And if "normal" tyres don't fit on the rims, then I'll just have to buy different rims too... damn!
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Old May 6th, 2003, 06:40 PM   #17 (permalink)
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I think the mistake that we've all made is to pass over the factory 15's They offer great value, and outside of race rubber you'd be hard put spending much more than $150 a corner, and you get the repair kit included

They are the lightest factory wheel/tyre combo, so slash your 0-100 sprint by two or more seconds. And, just like a good woman, they are great at telling you that they enjoy what your doing by squeeling with delight at the slightest hint of a corner. What's more, they offer that lovely drifting sensation at much lower speeds, so it's likely that you will either..

A) Have more fun at street legal speeds
B) Understeer off into a tree
C) Oversteer of into a tree.
D) Get your car confiscated under QLD's draconian anti-hooning laws for squeeling your tyres.

I also understand that your BMW dealer will give you a free set of steak knives with every blasted set they can get out of the corner of the workshop.

Think outside the square folks

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Old May 7th, 2003, 05:35 AM   #18 (permalink)
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I took my car in for a wheel alignment yesterday and it was spot on....no adjustment needed.
The guy was very impressed with the setup of the car which was good.
I for one am not to fussed about the run flats, they do the job and if i wanted better handling for the car id get semi slicks for the race track ....but for every day driving and constant thumping around corners they are okay.
A set of Bridgestone SO2"S or SO3"S would be bice though........but not in the wet

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Old May 7th, 2003, 06:00 AM   #19 (permalink)
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Quote:
Originally posted by eltel
Can anyone in Melbourne recommend a suspension specialist
that would know what they're doing, or is Bob Jane ok?

Regards, ElTel

I can point you towards a VERY good tyre guy.. he does alignments and such (as far as I know), its a friends place (I don't wan to pimp them 'cause someone on the Mini boards may get upset about free advertising!)

Anyway, these guys specialise in more performance oriented tyres etc, two of them drive Ferraris... So they tend to deal a lot with that end of the spectrum, they are in Richmond.
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Old May 9th, 2003, 09:59 AM   #20 (permalink)
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the only problem with replacing the run-flats with some non-run-flats...is that we Cooper S drivers don't get a spare wheel.

not sure I fancy being stuck on the Freeway for a couple of hours whilst Mr Repairman turns up.

anyone had reason to call BMW assistance? good or bad?

Al.
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