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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Coilovers needed - faster and stronger, NOT lower



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      08-29-2007, 11:46 AM   #23
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Quote:
Originally Posted by FourPtDrift View Post
You know, while you may have posted in this thread to "help" all you've succeeded in doing is offend. The RE-01R is the highest specific performance street/track tire on the market today.... nothing cheap about it. There are hard and fast procedures for DOT approval and ratings... and tire sizing is NOT arbitrary. And Bridgestone, the exclusive tire manufacturer for F1 and a dominant provider throughout the FIA is a technology leader, both for commercial and competition application.

Don't confuse an aggressive blocked shoulder and tread pattern with a poorly sized tire - or suggest that someone who makes a selection for said product doesn't know what they're doing.

-Daniel
1) I never said the tire was "CHEAP" .... I called it a "CHEATER TIRE" (cheater as in when road racing you can stick to the "legal" sizes that your limited to ... but are actually running something with more rubber) becuase just like Advans its sizing is bigger then pretty much every other tire manufacture. I know this because on my old Evo I use to run Advan A048s in 265/35/18 as they are the fastest dot R compound tires on the market and they are really like a 275 yet allow me to stay within the 265 classification. Also Im VERY familiar with the Bridgstone RE01Rs .... they are what I ran in Street Class time attacks as they have the lowest treadwear rating for a "street" tire and I too could get them in 265/35/18 and still stay in the street class sizing. Its also a known fact that the tire is bigger then standard sizing just like the Advans ...... so before you so quick to jump down someones throat you should read a little more carefully.

2)My point is your having problems because your 275s are really like 285s because of the brand of tire. Never did I once say they are bad tires ... because they are one of the best street tires on the market IMO .. the only thing that comes close is the Advan Neovas but those are not as good as the Bridgestones.

If you dont believe me on sizing go find someone else running 275s and go park your car next to them ... you will see your tires look "fatter" on the rims then their's do. I would be willing to bet $100 on it. In fact I think I have pics of Toyo T1Rs on a set of rims and then the Bridgestones on the same rims ... so I'll go find those and post them up.
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Last edited by Vegas_Sirk; 08-29-2007 at 12:06 PM.
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      08-29-2007, 12:54 PM   #24
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Why do you want stiffer springs? Reconsider HDs. They make the ride firm without touching springs. And if you prefer even more stability you can have sways.
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      08-29-2007, 01:55 PM   #25
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Quote:
Originally Posted by bnj View Post
Why do you want stiffer springs? Reconsider HDs. They make the ride firm without touching springs. And if you prefer even more stability you can have sways.
At the end of the day, springs are stress bearing members and as such they are the ones that take loading force. And under acceleration, breaking and cornering, spring rate will keep the car level. Sway bars are not exactly stress bearing as much as they focus on weight transfer and translation. HDs deal with oscillation and related dampening rates.

When I track a car, I tend to be very aggressive, very hard, and I need the car to keep up.

-Daniel
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      08-30-2007, 08:35 PM   #26
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Quote:
Originally Posted by M3This View Post
You can "tighten it up" with any of the popular coilover set ups ... The reason your rubbing is the Bridgestones are not really true to size .... your 275s are really like 285s .... Bridgestones are a bit of cheater tire just like Advans.
Quote:
Originally Posted by FourPtDrift View Post
You know, while you may have posted in this thread to "help" all you've succeeded in doing is offend. The RE-01R is the highest specific performance street/track tire on the market today.... nothing cheap about it. There are hard and fast procedures for DOT approval and ratings... and tire sizing is NOT arbitrary. And Bridgestone, the exclusive tire manufacturer for F1 and a dominant provider throughout the FIA is a technology leader, both for commercial and competition application.

Don't confuse an aggressive blocked shoulder and tread pattern with a poorly sized tire - or suggest that someone who makes a selection for said product doesn't know what they're doing.

-Daniel
Holy cow buddy... relax..

I'm not sure how anything M3this said was offensive in the least. He gave you a firsthand fact about the tires you chose. Said nothing about you making a mistake or that you dont know what you're doing.

As far as your "problems" I would think rolling your rear fenders and shaving your fronts should solve any/all rubbing issues.
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      08-31-2007, 08:48 AM   #27
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Quote:
Originally Posted by FourPtDrift View Post
You know, while you may have posted in this thread to "help" all you've succeeded in doing is offend.
-Daniel
I wasn't offended. Your response sounds pretty corporate PR to me.
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      08-31-2007, 11:30 AM   #28
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Quote:
Originally Posted by davig View Post
I wasn't offended. Your response sounds pretty corporate PR to me.

Maybe he works for Bridgestone ...... but then again if he did he would know his tires run big. I've talked with the Bridgstone guys at the track and at SEMA and they always admit they run a little big. Most likely a fan boy who reads all the marketing materials.
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      09-04-2007, 10:03 AM   #29
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Get some new high quality aftermarket shocks and slap some H&R sport springs from a heavier 335XI on there and you'll be all set!!
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      09-04-2007, 10:40 AM   #30
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Quote:
Originally Posted by stressdoc View Post
I think the OP asked a simple, clear question:
What is the minimum drop on the Bilstein PSS9 and the KW2/3?
[edit]: 30mm for both in front.

There are published stats on this. The Bilstein/Krupp site states 30-50mm for the PSS9s. As I remember this question from a long distant thread, the KWs had a bit more of a mandatory drop. [edit: apparently my memory sucks, the published stats indicate that they both have a minimum drop of 30mm] But no one has provided the data that the OP asked for.

Surely KSfrogman or Don or Sam know the answer to this off the top of their heads.

Edit: Ok here are the data from the KW site:

Model Year of Constr
Type Engine Lowering (F/R)
mm
Inches MSRP
( $ )
Coilover Variant 1
3series (E90) Sedan 06+(390L) 30-60/25-55
1.2-2.3/0.9-2.1 1395
Coilover Variant 2
3series (E90) Sedan 06+(390L) 30-60/25-55
1.2-2.3/0.9-2.1 1725
Coilover Variant 3
3series (E90) Sedan 06+(390L) 30-60/25-55
1.2-2.3/0.9-2.1 1995
I never thought I'd be answering this question, so I wasn't doing measurements. I had adjusted the rear coilovers on the KWV2 at least three times in the past. At the rear, the threaded sleeves sit atop the KW springs, and are now adjusted to twelve complete turns from maximum drop on my car.

Without removing my wheel and checking,I would guess that I can still raise the rear another inch before the threaded sleeve portion would unscrew completely off the "arm."

So anecdotally I would say that the max ride height of the KW would be similar or lower than that of a ZSP E90. A 30 mm minimum drop sounds reasonable; 30 mm is slightly more than an inch.

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      09-04-2007, 11:08 AM   #31
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Here's a link and some additional info:

http://kw-suspension.com/en/30_Produ...BMW&gruppe=all
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      09-04-2007, 11:12 AM   #32
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By comparison, Mark (Admin) had posted these...

Quote:
Originally Posted by MarkE90M3 View Post
Well, there are already some aftermarket suspension out there for the E90, and although BMW come with great handling cars from the factory, a simple spring/shock change can turn a great handling car into a sick handling car



I tried to compile it all into one list for now so we can all use it for reference.. hope this helps, and if anyone has suggestions or finds new products please post them here, it would help everyone out !



For those that don't know, its always better to get a matched spring/shock set for a car in terms of handling performance, ie. a coilover set will be better then just springs, but it may also be overkill for the street, depending on what you use your car for..





I'll try to organize these by the amount of lowering they offer from least agressive to most agressive. ALL LOWERING MEASUREMENTS ARE BASED ON THE STANDARD SUSPENSION, NOT SPORTS SUSPENSION. Obviously, if you have the sports suspension, then these options will lower the car a bit less then listed here.



----------------



Springs:



0.6" --> OEM Stock BMW Sports Suspension

1.2" / 1.0" --> Eibach Pro-Kit (part # 2085.140)

1.2" / ???? --> KW Automotive Springs (part # 25020058)

1.2" / ???? --> Hartge Sport Springs

1.3" / 1.2" --> H&R Sport Springs (part # 50490)

1.35" / 0.8" --> H&R Sport Springs (part # 29187-1) (** Europe-Part# ** this is aparently the same spring as the 50490 but with different lowering listings for some reason.)

1.57" / 1.3" --> Hamann Progressive Springs (part #20 090 120)

1.8" / 0.8" --> H&R Race Springs (part # 29183-1) (** Europe only **)

2.0" / 1.4" --> Eibach Sportline (part # 4.0285)



----------------



Shocks only:



Non-adjustable Shocks:



Bilstein B12 Tuning kit shocks (part # SE5-C043) -- Lowering Range--> 35mm

Bilstein B6 sport shocks (part # VE3-C037 / VE3-C038) -- Lowering Range --> retains stock height





----------------



Matched Sets/Coilover Sets:



Non-adjustable Matched Springs+Shocks:

Eibach Pro-system (part # 70-20-014-02-22) -- Lowering range--> Front/Rear: 1.2"



Height Adjustable:

KW Variant 1 coilovers (part # 10220032) -- Lowering range--> Front: 1.2-2.3" Rear: 0.9-2.1"

H&R Coilovers (part # 29177-1) -- Lowering range--> Front: 1.58-2.78" Rear: 1.19-2.38"

Eibach Prostreet-S (part # 65-20-014-01-22) -- Lowering range--> Front: 1.38-2.57" Rear: 1.38-2.57"

Bilstein B14 PSS coilover (part # HE5-C047) -- Lowering range--> 30-50mm

Hamann Coilovers (part # 20 090 105) -- Lowering range--> Front: up to 2.36" Rear: up to 1.57"



Height Adjustable + Rebound Adjustable Dampening:

KW Variant 2 coilovers (part # 15220032) -- Lowering range--> Front: 1.2-2.3" Rear: 0.9-2.1"



Height Adjustable + Rebound Adjustable + Compression Adjustable Dampening:

KW Variant 3 coilovers (part # 35220032) -- Lowering range--> Front: 1.2-2.3" Rear: 0.9-2.1"

Bilstein B16 PSS9 coilover (part # GM5-C051) -- Lowering range--> 30-50mm







---------



Anti-roll bars:



Eibach: 28mm / 15mm (part # 2085.320)

H&R: 27mm / 20mm (part # 33211-1)
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      09-04-2007, 11:33 AM   #33
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You have the ability with the TCKline CO's to run at stock ride height, or higher if you wish, as well as lowering the car as low as you want due to the unique ability of this system over the others in utilizing 60mm ID springs.
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