[Manxman1950]

Originally Posted by Jsoboti

Did you notice the exhaust sitting lower after installation of the inserts due to extra material causing the subframe to sit lower?

No.

[whinojosa]

Originally Posted by AWDBooSTIn90

-Front M3 sway bar
Reduces understeer and much better turn in

Thanks for the concise list. However one quick correction: the M3 front sway bar (ONLY) will do the exact opposite and PROMOTE understeer.

[Viorage]

In for knowledge

[Fundguy1]

I would also amend the list and say with regards to subframe bushings from weakest to strongest
stock
inserts (more of a refresh than an enhancement )
M3
Yellows
purple
black
derlin or full aluminum. Derlin if entering sanctioned autocross, full aluminum if you aren't

And add rear toe arms and rear diff lockdown.

[rulonger]

Originally Posted by Viorage

In for knowledge

+1

[AWDBooSTIn90]

Originally Posted by whinojosa

Thanks for the concise list. However one quick correction: the M3 front sway bar (ONLY) will do the exact opposite and PROMOTE understeer.

It actually doesn't. Its been proven many times that by going with the stock E92 or even E93 M3 front sway bar, you reduce understeer and get better turn in.

The only reason people dont uograde to M3 sway bars is because reducing flexibility in the rear, reduces grip. So if you dont have an LSD, then keep stock rear sway bar or maybe increase slightly with a non-M E93 stock rear sway bar

[rulonger]

Originally Posted by AWDBooSTIn90

It actually doesn't. Its been proven many times that by going with the stock E92 or even E93 M3 front sway bar, you reduce understeer and get better turn in.

The only reason people dont uograde to M3 sway bars is because reducing flexibility in the rear, reduces grip. So if you dont have an LSD, then keep stock rear sway bar or maybe increase slightly with a non-M E93 stock rear sway bar

Should not the front and rear sway bars be matched / compatible? If you only upgrade one, I would think that you would create an out-of-balance situation. I ask because I just ordered a Bilstein B12 Pro-kit for my E90. I am hesitant to swap out the front sway bar without also upgrading the rear.

I do not have an LSD, for what it is worth.

Cheers

[AWDBooSTIn90]

Originally Posted by rulonger

Should not the front and rear sway bars be matched / compatible? If you only upgrade one, I would think that you would create an out-of-balance situation. I ask because I just ordered a Bilstein B12 Pro-kit for my E90. I am hesitant to swap out the front sway bar without also upgrading the rear.

I do not have an LSD, for what it is worth.

Cheers

The B12 kit is great you'll love it. After you install and still want more precise steering get the M3 front sway bar and M3 front control arms.

Save the rear m3 sway bar for when you get an LSD

[Fundguy1]

Ok all you sway bar fans. I have an e93. I'm installing:
KwV2
AKE black subframe bushings
Wavetrac LSD
rear diff lockdown
M3 Strut brace
Possibly rear toe arms Or M3 front control arms

I know the e93 has a bigger rear sway. To upgrade handling would you swap to M3 sways? Front or rear or both? Is there a difference on M3 vert sways? If there is which would I use? I've been told only use front M3 sway but maybe the LSD would help. Thx

[mojobmw_e90]

Alright guys I have the zsp suspension kit on my e90 335 with m3 control arms and tension struts. Also have spacers all around with ps2 tires. I'm looking for a more responsive front feel on the steering wheel. Will a front sway bar help here? I had oem endlinks that are brand new installed

[neoduffer]

Originally Posted by Fundguy1

Ok all you sway bar fans. I have an e93. I'm installing:
KwV2
AKE black subframe bushings
Wavetrac LSD
rear diff lockdown
M3 Strut brace
Possibly rear toe arms Or M3 front control arms

I know the e93 has a bigger rear sway. To upgrade handling would you swap to M3 sways? Front or rear or both? Is there a difference on M3 vert sways? If there is which would I use? I've been told only use front M3 sway but maybe the LSD would help. Thx

Read The Hack's dissertation on the suspension upgrade progression and why front sway bars helps front grip.

rear bar? The Hack chimes in...

[Fundguy1]

Good info but idk if it answers my question. I get that a larger sway bar can lower traction by transferring away too much pressure from a tire lowering traction. However I don't think they added larger sways to the M3 to lower the traction. I'm looking to be balanced front to rear, and be planted solidly for acceleration. It seems the best solution may be an M3 front sway and stock rear. I plan on running one of 3 rear setups at different times. 295-305 Bridgestone Potenza RE -11, 275 Michelin PSS, or 275 hoosier R6 drag tires depending on the situation. Matching 235-245 fronts except tiny fronts for drag mostly Which is straight line and once or twice a year max. Would the wider rears with my upgrades make adding a front sway balance the car for 4 wheel drifts in corners and make it feel more planted?;

[chris82]

Originally Posted by whinojosa

Thanks for the concise list. However one quick correction: the M3 front sway bar (ONLY) will do the exact opposite and PROMOTE understeer.

I'm not following. Why does it promote understeer?

[neoduffer]

Originally Posted by Fundguy1

Good info but idk if it answers my question. I get that a larger sway bar can lower traction by transferring away too much pressure from a tire lowering traction. However I don't think they added larger sways to the M3 to lower the traction. I'm looking to be balanced front to rear, and be planted solidly for acceleration. It seems the best solution may be an M3 front sway and stock rear. I plan on running one of 3 rear setups at different times. 295-305 Bridgestone Potenza RE -11, 275 Michelin PSS, or 275 hoosier R6 drag tires depending on the situation. Matching 235-245 fronts except tiny fronts for drag mostly Which is straight line and once or twice a year max. Would the wider rears with my upgrades make adding a front sway balance the car for 4 wheel drifts in corners and make it feel more planted?;

I would only swap the front to an M3 sway bar and keep the rear stock.

Another one of The Hack's gems here. Upgrade Front Sway Bar Effectiveness from The Hack

Cliff Notes version: Once the front suspension travel goes pass the roll center, camber begins to decrease. Stiffer front bar adds corner stiffness and keeps the front from going pass the roll center. Too thick of a front bar and you'll lose traction.

It sounds like you're at the stage to introduce a change in sway bar and a stiffer front should help balance out the wider rear tires you're looking to use.

[techlogik]

Which M3 sway? Aren't their two? A 26mm and a 28mm (Performance)?

Also, anybody know the stock 335is sway diameters?

Lastly, is there a section or some photos of people on the B12 setup with 313 19" or similar wheels to show the actual drop/stance?

Thx

[Fundguy1]

I see one. The 28mm maybe you're thinking Msport.

[ashmostro]

Originally Posted by techlogik

Which M3 sway? Aren't their two? A 26mm and a 28mm (Performance)?

Yes there are two. 26.5mm is from the M3 sedan and coupe. 28mm is from the convertible. I recommend the 26.5 particularly if you are not touching the rear.

This is a helpful page: http://www.turnermotorsport.com/t-te...sway-bars.aspx

The 335is uses the m sport suspension parts.

[techlogik]

So what is the M Sport? Is that a 26.5 that tapers to 23mm? Or 26.5mm all the way through? Can't find that anywhere.

[Fundguy1]

I'm thinking an M3 e93 front for me, stock e93 rear. Just a nudge in the right direction. Or anyone think e93 M3 front? Thoughts?

[chris82]

Originally Posted by Fundguy1

I would also amend the list and say with regards to subframe bushings from weakest to strongest
stock
inserts (more of a refresh than an enhancement )
M3
Yellows
purple
black
derlin or full aluminum. Derlin if entering sanctioned autocross, full aluminum if you aren't

And add rear toe arms and rear diff lockdown.

I've heard the M3 RSFB are on part with the Powerflex Black and that he yellows are softer than the M3 . . . that's what I heard "on the street" lol

[Fundguy1]

Originally Posted by chris82

I've heard the M3 RSFB are on part with the Powerflex Black and that he yellows are softer than the M3 . . . that's what I heard "on the street" lol

They're rated lower like yellow status. there's a post somewhere on this.
http://www.e90post.com/forums/showthread.php?t=1055253

[chris82]

Originally Posted by Fundguy1

They're rated lower like yellow status. there's a post somewhere on this.
http://www.e90post.com/forums/showthread.php?t=1055253

Malek@MRF said the M3 were about the same as Powerflex Black FWIW