[DrRobert]

Originally Posted by cpie168

Thanks again ashmostro and DrRob. I'll do a search for Koni FSD to find out more.

Have a good one!

If you do a Google search you may come across an oft-cited review comparing Koni Yellow and FSD (Here, I'll do it for you:http://www.tirerack.com/suspension/tests/koni_fsd.jsp). I would STRONGLY advise you to COMPLETELY DISREGARD this article. Those tests were done on an E46 330Ci and are COMPLETELY IRRELEVANT to the E9x platform IMO. I drove an E46 330Ci for 13 years before getting my E90 and all I ever replaced were the tires. That car had a great suspension right off the dealer's lot. This E90 suspension has been a nightmare compared to that car, but it is possible to make it at least as good if not better than the E46. Be very careful though if you are on a budget - once you start changing things with the suspension one mod can quickly lead to another and it can get very expensive. You have been warned!

[DrRobert]

Originally Posted by ashmostro

Should be. Check out tire racks spec sheets they will tell you allowable rim width ranges for every tire in every size!

Dang. It says the rim width range for the the RE-11s in 265mm width is 9-10.5", so I guess that tire in that width won't work on my 8.5" rims. Thanks for the tip.

[ashmostro]

Originally Posted by DrRobert

Dang. It says the rim width range for the 265s is 9-10.5", so I guess that tire in that width won't work on my rims. Thanks for the tip.

Crap. Well at least you know...

[mlifxs]

Originally Posted by ashmostro

All of this also assumes we are talking about really high rate linear springs. If you're not then the comparison has even less meaning and linear springs can be just as comfortable cruising down the highway as mlifxs so aptly put it.

Yeah my experience is with Dinan and I really don't think the spring rates are high. I took some measurements before install and along with data on the sticky, concluded they were Eibach <= Dinan < BMW Perf yellows. Thus spring rates are not real high and the feedback effects on rough surfaces are reasonable. A passenger may not even notice. Because I know my car, I notice.

Edit: I would note that my car does behave much better on hard acceleration in turns, particularly a transition or s type curve, compared to zsp. DSC light doesn't flash nearly as often. So I think there's some positive benefit coming into play, either from an increase in spring rate over zsp or the linearity (or both? ). So I think there are some improvements even at low spring rates, but mainly when pushing the car hard.

[MIL.SPEC]

Originally Posted by DrRobert

Any issues running that size tire on your 335? I'm thinking of bumping it up a notch to those sizes, but with Bridgestone RE11s on OEM rims.

Zero. Zip. Nada. In the ARC-8 thread, they state that those tire sizes will work fine without rubbing or needing to roll the fenders. I think in the past 10,000 miles, I heard one sound for a split second that might have been the rear tire rubbing on the fender liner...and that was with a trunk load of stuff. So yeah, they're great.

Originally Posted by DrRobert

Dang. It says the rim width range for the the RE-11s in 265mm width is 9-10.5", so I guess that tire in that width won't work on my 8.5" rims. Thanks for the tip.

The ARC-8 18" rims they sell for the e92 are 8.5" in the front and 9.5" in the rear for a staggered set up.

[DrRobert]

Thank you. The ARC-8s are nice for sure, but I kinda want to keep my OEM rims to maintain a stock look. My buddy has the RE-11s on his 335 and loves them, I drove it last week and liked them too. I think I will probably keep my stock rims for now and try the RE-11s in 225/255. Appreciate the help!

[robc1976]

I run 295's with no issue

[cvc 22349a]

Originally Posted by DrRobert

Any issues running that size tire on your 335? I'm thinking of bumping it up a notch to those sizes, but with Bridgestone RE11s on OEM rims.

235 on an 8" wheel is ok; 8.5 is ideal. 265 on a 8.5 wheel is pretty wide; your sidewalls may roll more than they should; 9.5 is ideal for a 265 tire.

[Ramsey]

Originally Posted by cpie168

Thanks for your input mlifxs. What are the advantages of linear springs vs non-linear ones? If I already have ZSP springs, is it worth the extra to get a set of linear ones as replacement?

Guys, I have the M sport stock suspension, is this what you are calling the ZSP springs? Want to make sure I understand the terminology correct....

[ashmostro]

Yeah, ZSP is the option code for sport/M sport suspension

[AWDBooSTIn90]

Originally Posted by Ramsey

Guys, I have the M sport stock suspension, is this what you are calling the ZSP springs? Want to make sure I understand the terminology correct....

If your in USA, then yes M-sport gets sport package ZSP suspension.

[AWDBooSTIn90]

After reading this thread and a bunch of other thread like this.

Here is a mod list i made for DD/weekend spirited driving people: (in order)

-Rear subframe bushings
Either inserts or full solid bushings. Delrin bushings dont increase NVH.
Absolutely necessary for any E9x being driven hard

- Front M3 control arms
Tightens up front end. Sharpens steering dramatically

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

-Tires
If you have RFT's. Nows the time to get rid of them. Maybe this should of been forst on the list. Most likely actually

-Suspension
I will always recomend the Bilstein B12 kit. Cant beat it in every way. If you need/want coilovers. I would either get KW street comforts or something more expensive like TC Kline.

Another thing i recomend is dinan upper and lower rear shock mounts. Upper mount actually adds 10mm of travel.

Front Dinan Camber Plates also have been recomended by alot of people who run them.

If your still not happy. Look into the rest of the stock bushings. For example:
Rear diff bushings
Rear suspension arms (m3 arms or replace bushings)
Sway bar bushings
Strut mounts

Last but not least: LSD

[cpie168]

So the Dinan shock mounts change the ride height at all? Thanks.

[cvc 22349a]

Originally Posted by cpie168

So the Dinan shock mounts change the ride height at all? Thanks.

No but they do introduce a little more road noise into the cabin.

[cpie168]

Hmm, the increased road noise would be a concern. In what ways are they better than the stock ones?

[mlifxs]

Originally Posted by cpie168

Hmm, the increased road noise would be a concern. In what ways are they better than the stock ones?

my understanding is they add roughly 1/2" in suspension travel

[cvc 22349a]

Originally Posted by cpie168

Hmm, the increased road noise would be a concern. In what ways are they better than the stock ones?

They reduce the deflection that occurs with oem mounts and add 1 cm of compression travel. The former is important to me.

[ashmostro]

If it's the rear Dinan shock mounts we're talking about here, the noise increase is minimal at best, in my experience. I'm quite pleased with mine.

[Chicanery]

Originally Posted by MIL.SPEC

From someone who has upgraded about everything on their other car (Evo), I would suggest the KISS school of thought. The Bilstein B12 kit is a good kit. I'm going to get it for my 335 here in the next month.

You start messing with coilovers, you get into a whole new universe of stuff that needs to get upgraded...camber plates, bushings, rebuilding shocks...etc.

Not to mention, most of the lower level priced coilovers are garbage. If you put them on a shock dyno, you wouldn't like what you saw. I have a remote reservoir setup on my Evo. It handles fantastic. But unless you plan on seriously autocrossing or tracking your car, just going with something simple like the Bilsteins is probably the "best" choice. Otherwise, you start playing Russian Roulette with the slippery slope of car modifications.

Final reco:

Buy Bilstein B12 kit. http://www.turnermotorsport.com/p-22...n-package.aspx

Get new suspension components for install: http://www.ecstuning.com/BMW-E92-335...its/ES2622813/

Buy Whiteline rear subframe insert kit: http://www.whitelinesuspensionparts....FUeBfgodHmYAbg

Then see how you like everything. Of course do more research if you want, but that is a good starting point for a DD.

Are the suspension components from ecs necessary to be able to install the b12 kit? E90 lci 335i.. looking at getting the B12 kit specifically for the 335i

[Chicanery]

Bump.. would love to know the answer to question above...

[neoduffer]

Originally Posted by 335inthe305

Bump.. would love to know the answer to question above...

The ECS kit is totally optional and not necessary since you can transfer all of those items over from your current suspension. It just makes it a bit easier since you or the installer wouldn't have to disassemble all of the existing parts and reinstall on the coil overs. This makes the front install extra easy since the installer won't have to compress the springs to remove and reinstall the top mounts. If you've had substantial miles on your car (>60,000 miles), then you can also look at the ECS kit as a refresh of the bushings and mounts.

[MIL.SPEC]

I bought the ECS kit and didn't really need to. I had 35,000 miles on the OEM suspension, and everything essentially looked brand new.