How to get rid of understeer further after coilovers?

[Grinchxvx]

Now is the e93 sway better than say a hotchkis or h&r?

[chris82]

Originally Posted by yllwwgn

OP, dcaron9999 is exactly right in his approach to eliminating the understeer in our cars. And I am sure it involves copious amounts of camber too. THIS is all the stuff you will have to do to mitigate the understeer... as far as getting rid of it, will never happen... we just have to accept it as such.

There is a limit to camber as well as too much will limit the contact patch of the tire

Originally Posted by Grinchxvx

Now is the e93 sway better than say a hotchkis or h&r?

E93 bar has a kink in the middle where it is not as thick as the rest of the bar so exactly how stiff it is is questionable and I have never found a 'solid' answer on whether it is stiffer than the E92 M3 bar.

I don't know much about the H&R or Hotchkis bar or the benefits of doing those over the M3 one. I presume the Hotchkis is stiffer than the M3 bar as it is 32mm diameter. H&R I believe is 27mm.

[Grinchxvx]

Originally Posted by Chrisar82

There is a limit to camber as well as too much will limit the contact patch of the tire

E93 bar has a kink in the middle where it is not as thick as the rest of the bar so exactly how stiff it is is questionable and I have never found a 'solid' answer on whether it is stiffer than the E92 M3 bar.

I don't know much about the H&R or Hotchkis bar or the benefits of doing those over the M3 one. I presume the Hotchkis is stiffer than the M3 bar as it is 32mm diameter. H&R I believe is 27mm.

Sounds like I want the hotchkis if the price is right, the only thing is I think I heard something about bad fit so I'll have to look into that.

[Freon]

Originally Posted by DietTab

8.5 et45 is a poor fit in the front. you'd need a 7mm spacer to put them where they need to be, which would give you very little hub support. VMR doesnt make any 1 series correct fitments, i dont know why people buy them

Huh? Unless his front coilover spring perch is too low I don't see why. You can fit up to a 255/35/18 performance street tire on a 18x8.5 +45 front without hitting the strut. Do you want pictures? This is also the same size Apex produces (ARC-8, EC-7) for the E82 non-M along with their special rear set in +62 or +58. Apex most certainly does produce correct 1 series fitment, one of the only ones that actually produced the special super high offset rears.

Until you jump to something wider than 8.5 (and add a ton of camber), or go wide body, +45 is optimal for the front. It not only maximizes the tire that fits, but keeps the dave point/scrub radius the same as OEM (as long as you keep the OEM control arms at least). Once your tire hits the strut with a 18x8.5 +45, you are probably running a tire that is too wide for a 8.5" wheel anyway.

A front sway bar can help reduce understeer because the car has a front Mac strut, which doesn't do a great job retaining camber when the car rolls too much. The bar reduces roll, thus keeping a better contact patch. It's not something you'd probably do to reduce understeer with a 370Z or Miata which have double wishbones, but people even do this on other understeer prone Mac strut cars like the STI, EVO, etc. The local autocrossers will put crazy front bars on their Subarus... Whiteline makes or made a 32mm solid front bar for the GD Impreza!

[Freon]

Might try reading this for more info:
http://www.motoiq.com/MagazineArticl...and-Scrub.aspx
http://www.motoiq.com/MagazineArticl...and-Scrub.aspx
(and the other pages)

[I35it]

I am running 19x8.5 +35 with my 235/35s RE-11s with no issues. Thats with my fenders rolled of course. Contact patch w/ -2.8 still has plenty of tire contact for DD and great for track use!

Also I am running e93 M3 Sway bar and it just seems like a better fit because its a stock part that does its job well. Most M3 owners really dont change out there sway bars.

[Grinchxvx]

Originally Posted by Freon

Huh? Unless his front coilover spring perch is too low I don't see why. You can fit up to a 255/35/18 performance street tire on a 18x8.5 +45 front without hitting the strut. Do you want pictures? This is also the same size Apex produces (ARC-8, EC-7) for the E82 non-M along with their special rear set in +62 or +58. Apex most certainly does produce correct 1 series fitment, one of the only ones that actually produced the special super high offset rears.

Until you jump to something wider than 8.5 (and add a ton of camber), or go wide body, +45 is optimal for the front. It not only maximizes the tire that fits, but keeps the dave point/scrub radius the same as OEM (as long as you keep the OEM control arms at least). Once your tire hits the strut with a 18x8.5 +45, you are probably running a tire that is too wide for a 8.5" wheel anyway.

A front sway bar can help reduce understeer because the car has a front Mac strut, which doesn't do a great job retaining camber when the car rolls too much. The bar reduces roll, thus keeping a better contact patch. It's not something you'd probably do to reduce understeer with a 370Z or Miata which have double wishbones, but people even do this on other understeer prone Mac strut cars like the STI, EVO, etc. The local autocrossers will put crazy front bars on their Subarus... Whiteline makes or made a 32mm solid front bar for the GD Impreza!

There the clearance I had with 18x8.5 et 45 with 225/40/18 PSS. But this was pretty much as low as I could get it before it touched. I'm sure if I raised it up to stock like height it would help

[chris82]

Originally Posted by Freon

A front sway bar can help reduce understeer because the car has a front Mac strut, which doesn't do a great job retaining camber when the car rolls too much. The bar reduces roll, thus keeping a better contact patch. It's not something you'd probably do to reduce understeer with a 370Z or Miata which have double wishbones, but people even do this on other understeer prone Mac strut cars like the STI, EVO, etc. The local autocrossers will put crazy front bars on their Subarus... Whiteline makes or made a 32mm solid front bar for the GD Impreza!

Yes, right on

[DSSG]

Slow down?