MINI2

BMWF1 · May 15th, 2007, 06:06 PM

If the sport suspension includes firmer sway bars and stiffer springs and/or shocks then what they are charging (at least here in the US) is very fair. But if it is only thicker sways then I can get it done much cheaper (and with thicker bars) than what MINI charges. It would be very interesting to know the exact spec differences if anyone knows them.

cristo · May 15th, 2007, 10:41 PM

Quote: Originally Posted by BMWF1 (original)

Do you have any confirmation of this? If so, what are the spec differences?

as per post 16 on this thread

copying from a previous thread (post#63):
http://www.mini2.com/forum/2nd-gen-w...ml#post2898293

According to the realoem site, ( RealOEM.com Online BMW Parts Catalog )
the Cooper R56 has
a 23.5 mm front bar and 18 mm rear bar for Sport Suspension, and
a 21.5 mm front bar and 16 mm rear (same part number here as the 1st Gen SS bar)
for regular (non-Sport).

The Cooper S R56 has a
a 23.5 mm front and 18 mm rear bar for Sport suspension, and
a 22.5 mm front and 17 mm rear bar for regular (non-Sport)

They also list different strut part numbers for the regular vs. sport suspensions.

realoem doesn't list spring applications, but I'd be willing to bet they're different
for the Sport vs. the regular for the R56.
They're different for the R53 MC vs MCS vs One as per my BMW/MINI ETK cd-rom.

BMWF1 · May 16th, 2007, 12:37 AM

Thank you for the information, however, I am looking specifically for the spec differences between the claimed firmer shocks and springs rather than the spec differences between the anti-roll bars.

Bhatch · May 16th, 2007, 01:51 AM

Hi,

I just wanted to let you all know that 1mm on the outer diameter does alot for stiffness of the suspension.

twist = (2 x torque x length)/(p x diam4 x material modulus)

if we assume the same material is the same, we can basically say that the torsional rigidity is a function of the diameter to the 4th power..

So on the sports suspension on a MCS;
22.5^4 / 23.5^4mm = 84% stiffer.
and for the rear
17^4/18^4 = 79% stiffer.

Which i am sure they put alot of engineering into knowing that this is the correct amount of sway bar for the car. From my experience As a person who used to SOLO2 (autocross) short wheel base civics i think that 19mm is the most you should go anyway on that wheel base.

Anyway when i order my MCS at the end of the year i will get the sport package and put Koni Yellows on it.

cristo · May 16th, 2007, 02:43 AM

Actually,

23.5^4 / 22.t^4 = 1.19 or 19% stiffer

18^4 / 17^4 = 1.26 or 26% stiffer

Regarding data on shock performance, I have seen a bunch of shock dyno curves
on vwvortex.com (mostly about aftermarket shocks, but some stock curves),
but never on a MINI site.

Spring rate data on MINI stock and aftermarket springs is also quite sparse.

May 15th, 2007, 06:06 PM	#21
BMWF1 Zoom Zoom Join Date: May 2007 Local Time: 10:28 PM Posts: 22 Offline	If the sport suspension includes firmer sway bars and stiffer springs and/or shocks then what they are charging (at least here in the US) is very fair. But if it is only thicker sways then I can get it done much cheaper (and with thicker bars) than what MINI charges. It would be very interesting to know the exact spec differences if anyone knows them. Very Proud Owner of a 2006 Mazda MX-5 GT 6-Speed Manual Mods: RoadsterSport exhaust, MAZDASPEED intake and springs, Aluminum dash and pedals, Voodoo

May 16th, 2007, 12:37 AM	#23 (permalink)
BMWF1 Zoom Zoom Join Date: May 2007 Local Time: 10:28 PM Posts: 22 Offline	Thank you for the information, however, I am looking specifically for the spec differences between the claimed firmer shocks and springs rather than the spec differences between the anti-roll bars. Very Proud Owner of a 2006 Mazda MX-5 GT 6-Speed Manual Mods: RoadsterSport exhaust, MAZDASPEED intake and springs, Aluminum dash and pedals, Voodoo

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May 15th, 2007, 10:41 PM	#22 (permalink)
cristo BLIKSEM (my brg/brg mc) Join Date: Mar 2003 Location: york, pennsylvania Local Time: 12:28 AM Posts: 2,213 Offline	Quote: Originally Posted by BMWF1 (original) Do you have any confirmation of this? If so, what are the spec differences? as per post 16 on this thread copying from a previous thread (post#63): http://www.mini2.com/forum/2nd-gen-w...ml#post2898293 According to the realoem site, ( RealOEM.com Online BMW Parts Catalog ) the Cooper R56 has a 23.5 mm front bar and 18 mm rear bar for Sport Suspension, and a 21.5 mm front bar and 16 mm rear (same part number here as the 1st Gen SS bar) for regular (non-Sport). The Cooper S R56 has a a 23.5 mm front and 18 mm rear bar for Sport suspension, and a 22.5 mm front and 17 mm rear bar for regular (non-Sport) They also list different strut part numbers for the regular vs. sport suspensions. realoem doesn't list spring applications, but I'd be willing to bet they're different for the Sport vs. the regular for the R56. They're different for the R53 MC vs MCS vs One as per my BMW/MINI ETK cd-rom.

May 16th, 2007, 01:51 AM	#24 (permalink)
Bhatch MINI2 Newbie Join Date: May 2007 Location: My heart is in MTL Local Time: 12:28 AM Posts: 1 Offline	Hi, I just wanted to let you all know that 1mm on the outer diameter does alot for stiffness of the suspension. twist = (2 x torque x length)/(p x diam4 x material modulus) if we assume the same material is the same, we can basically say that the torsional rigidity is a function of the diameter to the 4th power.. So on the sports suspension on a MCS; 22.5^4 / 23.5^4mm = 84% stiffer. and for the rear 17^4/18^4 = 79% stiffer. Which i am sure they put alot of engineering into knowing that this is the correct amount of sway bar for the car. From my experience As a person who used to SOLO2 (autocross) short wheel base civics i think that 19mm is the most you should go anyway on that wheel base. Anyway when i order my MCS at the end of the year i will get the sport package and put Koni Yellows on it.

May 16th, 2007, 02:43 AM	#25 (permalink)
cristo BLIKSEM (my brg/brg mc) Join Date: Mar 2003 Location: york, pennsylvania Local Time: 12:28 AM Posts: 2,213 Offline	Actually, 23.5^4 / 22.t^4 = 1.19 or 19% stiffer 18^4 / 17^4 = 1.26 or 26% stiffer Regarding data on shock performance, I have seen a bunch of shock dyno curves on vwvortex.com (mostly about aftermarket shocks, but some stock curves), but never on a MINI site. Spring rate data on MINI stock and aftermarket springs is also quite sparse.

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