[BMW Steve]

E93 335i coilovers

As it says above, this one is for the e93 boys with coilovers.

I need some 1/Advise 2/Recommendations

I am replacing my coilovers again, the 1st set were JOM,s and on the car for not many months, In June I replaced them with a set of HSD MonoPro Coilovers that I just don't like, the rear springs are not stiff enough and I just don't like the ride also when I accelerate the rear end just drops and the wheels disappear in to the wheel arch, I have asked the question at Driftworks and they are saying the kit fits the complete E9X range, but I think I need stiffer rear springs due to the extra weight.


So they will be removed after a rolling road day I am attending on the 25th.

I am now looking at some thing else, possibly B14's or some KW's but would like to know if your e93 is on coilovers then what product, and how dose it feel/ride on the roads...

[Hibbyfor]

I'm running KW's and have the same problem and I'm on my second set of uprated springs on the rear, the first set were simply not useable. Kits that are listed as fitting any E9X are not correctly advertised IMO. There's no way the same springs can take the extra weight of the E93. If you go with KW I'd spec the rears up 2 levels. Give the boys at KW a phone, I found them very helpful.

[BMW Steve]

Originally Posted by Hibbyfor

I'm running KW's and have the same problem and I'm on my second set of uprated springs on the rear, the first set were simply not useable. Kits that are listed as fitting any E9X are not correctly advertised IMO. There's no way the same springs can take the extra weight of the E93. If you go with KW I'd spec the rears up 2 levels. Give the boys at KW a phone, I found them very helpful.

What are they like at the front end for bumps, dips, hole's etc, I found the HSD,s to be hard and I feel every thing,,, although the hold the road superbly

[Hibbyfor]

They're really good Steve infact when fitting the kit I only had time to do the fronts one day and the rears the next, I drove the car with only the fronts fitted and found it perfect, turn in was vastly improved and the ride didn't really have a noticeable difference. It was when the rears were fitted the ride became harsh but I'm at full adjustment on the rear and it's still too low I suspect if I uprated the springs again ride quality and handling would really improve. These things need a bit of height on the rear.

[Digitalize]

You need to start researching spring ratings and spec'ing something yourself.

I'd be starting by looking at something around 8/18k to try and give the rear the stiffness it needs to match the front.

Most coilover kits are 8/12k as standard which is too soft on the rear for any of the bodyshapes due to motion ratio, which means the rear is 2-3x softer than the front if the springs were the same rating, due to their placement on the control arm and leverage.

I've never thought much of HSD's, they just seem like cheap coilovers that have got a bit of a name for themselves through Japanese stuff.

I'd look at custom spec'ing some BC's or speaking to Bilstein and seeing what they suggest.

[Chappers 71]

Steve have you fitted shortened drop links?

[BMW Steve]

Originally Posted by Chappers 71

Steve have you fitted shortened drop links?

NO, they were not required, I did ask the Q when purchasing the HSD's

I am looking at some Blistein B14 or KW ST XA Coilover, I just need to make sure the spring rating is going to make it,,,,,,,

[BMW Steve]

Bit of a update on this...

After some emails and then a conversation with Driftworks its been agreed that the springs provided are not stiff enough to support the e93,

I have been offered a set of e93 M3 Adjusters and 18k springs

"They Said"

This kit is not proven in this assembly yet but we strongly believe it will all work together and can supply these parts to you for free if you can confirm the fitment of them into the non-M3 version of the car. All we ask from you is a confirmation of fitting and a couple of photos of these in the car for our own records.

As for the front end, it seems I have the dampers down to low/soft hence the spring topping out or the bang I feel when hitting bumps etc, So, going to try the M3 bits and raise the front dampers and see how that go's...

[Digitalize]

If the damper is bottoming out it's too short, either because the damper body is too long or it's the type where you lower the spring seat to adjust height and it's too low/the spring too soft.

I'm confused on the M3 adjusters, unless the springs are a different diameter? The lower control arms are different on the M3 but I'm not sure if the spring seat is different inside the arm.

[BMW Steve]

Originally Posted by Digitalize

If the damper is bottoming out it's too short, either because the damper body is too long or it's the type where you lower the spring seat to adjust height and it's too low/the spring too soft.

I'm confused on the M3 adjusters, unless the springs are a different diameter? The lower control arms are different on the M3 but I'm not sure if the spring seat is different inside the arm.

I will know more on Sunday...

[BMW Steve]

So, Its sorted,,,,,,


After a hearty breakfast yesterday I went and replaced the rear springs and adjusters for the M3 adjusters and 18k springs. The adjusters were a direct fit so no issues there, the 18k springs are loads better, no more bouncing around and dropping the rear end when I boot it. TBH, it feels lots better at the rear end so happy with the result...

[Digitalize]

Yeah an 18k spring will bring it much closer to the original front/rear ratio, especially on the E93.

Looks like the 'M3' adjusters are just longer threads.

[BMW Steve]

Originally Posted by Digitalize

Yeah an 18k spring will bring it much closer to the original front/rear ratio, especially on the E93.

Looks like the 'M3' adjusters are just longer threads.

Yep, longer as the spring is a little shorter, the worry there was weather they would fit in the same spring cup as the 335,,,, No problems there.

[chrismb]

Originally Posted by BMW Steve

So, Its sorted,,,,,,


After a hearty breakfast yesterday I went and replaced the rear springs and adjusters for the M3 adjusters and 18k springs. The adjusters were a direct fit so no issues there, the 18k springs are loads better, no more bouncing around and dropping the rear end when I boot it. TBH, it feels lots better at the rear end so happy with the result...

any update on the ring so far?

[Chappers 71]

Originally Posted by chrismb

any update on the ring so far?

Steve sold his 35i a while ago

[chrismb]

Originally Posted by Chappers 71

Steve sold his 35i a while ago

ahh just noticed this is an old thread

I have an e93 335i non sport and i want to lower it but wondering would KW street comfort would be best for me....i only care about handling for sharp corners and smoothness but also....however i definitely want to lower my car from it already being stocked...i dont want it slammed or anything

trying to figure out my best options...willing to spend up to 2500

[Phil325i]

Originally Posted by chrismb

trying to figure out my best options...willing to spend up to 2500

IMHO don't forget to consider Ohlins Road & Track. Excellent handling with a super smooth ride...

[chrismb]

Originally Posted by Phil325i

IMHO don't forget to consider Ohlins Road & Track. Excellent handling with a super smooth ride...

my car will be for street use only. I never use the track

I was considering the Ohlins R&T as well but I live in WDC where the roads can be salted pretty heavily. When reading, I heard KW SC are good for winters unlike the Ohlins

[Phil325i]

Originally Posted by chrismb

my car will be for street use only. I never use the track

I was considering the Ohlins R&T as well but I live in WDC where the roads can be salted pretty heavily. When reading, I heard KW SC are good for winters unlike the Ohlins

Don't be put off by the '& Track' in the name. I use them only for road use. Don't know where you got the idea Ohlins can't cope with road salt. The majority of the parts are aluminium and have been corrosion tested to ISO 9227. We get plenty of road salt in the UK and yes, the tubes do loose their 'shine', but don't rust...