Don't like the non-RFT lost precision - BMW Performance Suspension or M3 bushings ?

cstavaru · 08-19-2010, 04:13 AM

Hi,

I switched my RFT tires to non-RFT (Bridgestone Potenza S001) and I don't really like the lost steering precision and rear-end feel. I don't feel the car as secure and predictable as before. I have done about 1000 miles with the new tires (should I allow more for break-in ?).

However, I would like to continue to the non-RFT route in the future, and I was wondering, what are the most important suspension bits that can reverse this behaviour ?

Would BMW Performance Suspension improve this, or do I need to upgrade the subframe bushings ? I would definitely don't want to do both because the suspension would become too stiff and this is one of the reasons I gave up RFTs.

Thanks !

kevin@bavarianx · 08-19-2010, 04:29 AM

M3 control arms, tension arms, and bushings would make a night and day difference. Then some spring & shock combo or coilovers. Also some tires are more precision in steering than others. The Advan Neova AD08 is one the best steerin precision but they are very pricey tires.

GaryS · 08-19-2010, 06:32 AM

Quote:

Originally Posted by cstavaru

Would BMW Performance Suspension improve this, or do I need to upgrade the subframe bushings ? I would definitely don't want to do both because the suspension would become too stiff and this is one of the reasons I gave up RFTs.

Then just upgrade the shocks to Koni Sports, FSD or Bilstein.

stressdoc · 08-19-2010, 09:27 AM

The M3 control arms will improve steering feel without adversely affecting ride quality. The rear subframe bushings tighten things up, but add a tiny amount of harshness.
I suggest that your problem primarily stems from your tire choice. B-stone RE-11s, Dunlop Direzza Z1s, or Yoko AD08/07s would provide much better handling, albeit with a stiffer and noisier ride.

Since you have to live with your S001s for a while, I suggest experimenting with tire pressure to improve handling.

And yes, the BMW Perf dampers and springs will greatly improve roll, dive, etc.

marconi118 · 08-19-2010, 10:06 AM

strange the S001 are brand new ultra sport tires from bridgestone, they are winning all tests... and they are the successor of the famous S-03

I am running S-03, the side wall is so stiff as the RFT and the steer precision is so sharp!

but S001 is still to be discovered....

08-19-2010, 04:13 AM	#1
cstavaru Brigadier General 313 Rep 3,262 Posts Drives: 2009 335i M Sport Sedan 6MT Join Date: Aug 2008 Location: Bucharest, Romania iTrader: (0)	Don't like the non-RFT lost precision - BMW Performance Suspension or M3 bushings ? Hi, I switched my RFT tires to non-RFT (Bridgestone Potenza S001) and I don't really like the lost steering precision and rear-end feel. I don't feel the car as secure and predictable as before. I have done about 1000 miles with the new tires (should I allow more for break-in ?). However, I would like to continue to the non-RFT route in the future, and I was wondering, what are the most important suspension bits that can reverse this behaviour ? Would BMW Performance Suspension improve this, or do I need to upgrade the subframe bushings ? I would definitely don't want to do both because the suspension would become too stiff and this is one of the reasons I gave up RFTs. Thanks ! __________________ Mods(click): Cobb + RB Turbos \| Aquamist HFS-4 Meth \| Drexler LSD \| Bilstein B12 Pro-Kit \| Custom K&N Apollo Intake \| Wagner Intercooler \| Macht Schnell Downpipes \| BMW Performance Power Kit \| BMW Performance Exhaust \| BMW Performance Short Shifter \| M3 Subframe Bushings \|
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08-19-2010, 04:29 AM	#2
kevin@bavarianx Banned 33 Rep 812 Posts Drives: E36 M3 Join Date: Jul 2010 Location: Brea, CA iTrader: (3)	M3 control arms, tension arms, and bushings would make a night and day difference. Then some spring & shock combo or coilovers. Also some tires are more precision in steering than others. The Advan Neova AD08 is one the best steerin precision but they are very pricey tires.
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08-19-2010, 09:27 AM	#4
stressdoc Moderator 618 Rep 10,855 Posts Drives: BMW i8; Toy 4runner TRD pro Join Date: Jun 2005 Location: Waco TX iTrader: (0)	The M3 control arms will improve steering feel without adversely affecting ride quality. The rear subframe bushings tighten things up, but add a tiny amount of harshness. I suggest that your problem primarily stems from your tire choice. B-stone RE-11s, Dunlop Direzza Z1s, or Yoko AD08/07s would provide much better handling, albeit with a stiffer and noisier ride. Since you have to live with your S001s for a while, I suggest experimenting with tire pressure to improve handling. And yes, the BMW Perf dampers and springs will greatly improve roll, dive, etc. __________________ My recent ED photos: http://f80.bimmerpost.com/forums/sho....php?t=1026808 my not-so-recent ED: http://www.e90post.com/forums/showthread.php?t=31829 Please join BMWCCA http://bmwcca.org/index.php?pageid=c...&ref_by=300279
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08-19-2010, 10:06 AM	#5
marconi118 Major 94 Rep 1,184 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	strange the S001 are brand new ultra sport tires from bridgestone, they are winning all tests... and they are the successor of the famous S-03 I am running S-03, the side wall is so stiff as the RFT and the steer precision is so sharp! but S001 is still to be discovered....
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