My Suspension quest! 130i

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THETYRANT
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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 12:01 pm

kas206 wrote:
Mon Jan 08, 2018 11:37 am

Body roll does bother me a little bit. Would I need to change the rear ones only or would I need to change the fronts too? I'm guessing the eibachs come as a set and are shorter than the OEMs. I don't really want to lower the car.
You have a few options imo, switch to the thicker M3 front ARB if not already done so as this helps with body roll and a good mod, fit the Eibach Prokit Rear springs which wont lower the car at all in my experience (despite what Eibach say) and what others have found on here, the Fronts do drop about -10mm on Msport but rears actually lift rear slightly if on old stock springs I found, also being stiffer rate (approx. 410lb vs msport 370lb) helps reduce roll to a degree and improves turn in.

Another option is the BMW Performance springs which are slightly stiffer again but im not sure if these lower car as ive not tried them, im tempted to try them next but like you I don't want to go any lower, part numbers on the BMW springs is a bit of minefield as well, ive got some number from usa forum for 135i which will fit the 130i as well and possibly sit a little higher due to 130i being lighter, however without fitting them its hard to say, they can be bought from Cotswolds on here for around £100 the pair.

Eibachs list individual springs now as well as complete kit on the online catalogue, so in theory im sure a dealer could get just the rears.

Part numbers for 130i Prokit rear spring is F11-20-013-01-HA

Another options is to change the Koni bumpstops for BMWP versions which are only about 10mm shorter than Msport ones, this gives a slight improvement in ride quality but not as much as the Koni ones before they become active.

Food for thought :)
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

kas206
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Re: My Suspension quest! 130i

Post by kas206 » Mon Jan 08, 2018 1:16 pm

THETYRANT wrote:
Mon Jan 08, 2018 12:01 pm
kas206 wrote:
Mon Jan 08, 2018 11:37 am

Body roll does bother me a little bit. Would I need to change the rear ones only or would I need to change the fronts too? I'm guessing the eibachs come as a set and are shorter than the OEMs. I don't really want to lower the car.
You have a few options imo, switch to the thicker M3 front ARB if not already done so as this helps with body roll and a good mod, fit the Eibach Prokit Rear springs which wont lower the car at all in my experience (despite what Eibach say) and what others have found on here, the Fronts do drop about -10mm on Msport but rears actually lift rear slightly if on old stock springs I found, also being stiffer rate (approx. 410lb vs msport 370lb) helps reduce roll to a degree and improves turn in.

Another option is the BMW Performance springs which are slightly stiffer again but im not sure if these lower car as ive not tried them, im tempted to try them next but like you I don't want to go any lower, part numbers on the BMW springs is a bit of minefield as well, ive got some number from usa forum for 135i which will fit the 130i as well and possibly sit a little higher due to 130i being lighter, however without fitting them its hard to say, they can be bought from Cotswolds on here for around £100 the pair.

Eibachs list individual springs now as well as complete kit on the online catalogue, so in theory im sure a dealer could get just the rears.

Part numbers for 130i Prokit rear spring is F11-20-013-01-HA

Another options is to change the Koni bumpstops for BMWP versions which are only about 10mm shorter than Msport ones, this gives a slight improvement in ride quality but not as much as the Koni ones before they become active.

Food for thought :)
Thank you for the lengthy explanation.

I think the best option would be the Eibachs rear springs. Seems to be the cheapest solution at £46. The part number for the Eibachs are for the 130i. Would these fit in a 135i?
2008 BMW 135i - M3 Control arms, Whitelines 2 piece SFB, Koni sports shocks. BMW performance carbon boot spoiler, DEPO V1, Darlines, NBT retrofit. BMW Performance gear knob & handbrake.

M3 front anti roll bar coming soon!

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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 1:23 pm

Sorry forgot you were in 135i, the spring are interchangeable but slight variations in length etc, Eibach prokit rear spring number for E82 135i is F11-20-016-01-HA also I never ran the Pro-kit on my 135i only a 130i so not sure about lowering on 135, will see if I can find any info on that.

Ian
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 1:33 pm

Looked a few 135i Eibach pro-kit installs and they seem to drop around 15mm at rear so maybe not ideal for you, I guess the fat bum on the coupe drops more than the hatch which as mentioned doesn't on these springs, back to drawing board I guess! I would drive it more as is see how you find it over more miles.

Here is 1 thread I found with some good pictures of after Eibach kit - http://www.1addicts.com/forums/showthread.php?t=260665

Ian
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

kas206
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Re: My Suspension quest! 130i

Post by kas206 » Mon Jan 08, 2018 1:40 pm

THETYRANT wrote:
Mon Jan 08, 2018 1:33 pm
Looked a few 135i Eibach pro-kit installs and they seem to drop around 15mm at rear so maybe not ideal for you, I guess the fat bum on the coupe drops more than the hatch which as mentioned doesn't on these springs, back to drawing board I guess! I would drive it more as is see how you find it over more miles.

Here is 1 thread I found with some good pictures of after Eibach kit - http://www.1addicts.com/forums/showthread.php?t=260665

Ian
Thank for the info.

I think I'll go for a proper drive this evening and see how it feels I didn't get chance to drive that long yesterday. Having said that, i hate driving cars that have body roll lol. So I think I might have to go down the performance springs down the line.
2008 BMW 135i - M3 Control arms, Whitelines 2 piece SFB, Koni sports shocks. BMW performance carbon boot spoiler, DEPO V1, Darlines, NBT retrofit. BMW Performance gear knob & handbrake.

M3 front anti roll bar coming soon!

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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 1:53 pm

Yes it could be with some more miles you don't notice it, been looking at the Eibach spring specs and the 130i and 135i springs are the same apart from 130i is 13mm longer so those maybe an option for you, there is also the convertible springs which are stiffer/longer again due to weight in back of those, will have a better look later at that.

Some body roll is good as it can mean lots more traction as it allows weight to transfer onto tyres, going too stiff on springs especially with road tyre can make car twitchy and feel lacking in grip as tyre gets overloaded
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

kas206
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Re: My Suspension quest! 130i

Post by kas206 » Mon Jan 08, 2018 2:30 pm

THETYRANT wrote:
Mon Jan 08, 2018 1:53 pm
Yes it could be with some more miles you don't notice it, been looking at the Eibach spring specs and the 130i and 135i springs are the same apart from 130i is 13mm longer so those maybe an option for you, there is also the convertible springs which are stiffer/longer again due to weight in back of those, will have a better look later at that.

Some body roll is good as it can mean lots more traction as it allows weight to transfer onto tyres, going too stiff on springs especially with road tyre can make car twitchy and feel lacking in grip as tyre gets overloaded
If they are 13mm longer won't that raise the rear slightly?
Same again with the E88. I don't mind a slight 10mm drop but not a rise.

I think my car also needs a alignment. The alignment was done about six months ago when I did the rear SFB. I find myself doing micro adjustments when driving and the steering has gone off centre too.
2008 BMW 135i - M3 Control arms, Whitelines 2 piece SFB, Koni sports shocks. BMW performance carbon boot spoiler, DEPO V1, Darlines, NBT retrofit. BMW Performance gear knob & handbrake.

M3 front anti roll bar coming soon!

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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 2:43 pm

Just been looking over the various Eibach Pro-kit rear spring specs on the TUV certs, interestingly they are all the stated at same rate of approx 415lb (9.25 coils, 14.25mm wire and 99mm OD) but vary in length as below

E82 - 135i Coupe @ 293mm
E88 - 135i Cabrio @ 300mm
E81/7 - 130i Rear @ 307mm

Would be interesting to see the 130i prokit rear spring on a 135i as suspect it will give similar height to stock msport but with higher spring rate, also even a stock 130i rear spring on 135i as the 135 msport rear springs are only 350lb compared to stock 130i msport springs @ 370lb and while not a huge difference I know but as i ran the 135i msport spring for awhile on my old 130i and it did feel a touch softer giving slightly more supple ride, shame i skipped all my stock msport springs last year or someone could of had a play.

The mystery of BMW thinking on springs continues :D

Im still researching which way im going on springs with these konis, have a few options on table from BMWP 135i springs, Swift Spec-R, Eibach Pro-kit, something custom made!...or current fave but most expensive is the coilover conversion kit from HPA in usa which means you can use any 2.5" spring on stock fitment Koni sport dampers, this allows adjustable height front and rear (not that bothered on that really) but main thing is being able to use any rate 2.5" coilover spring allowing fine tuning of ride/handling, i would like to try same spring rate as my 135i Ohlins kit (300lb front / 400lb rear) but on the Koni dampers which would be possible, just a costly way.

Im waiting for my Koni dampers arriving this week so i can measure up and see if i can make make a similar kit to the one HPA offers for less money, even if not height adjustable i wouldnt mind as long as i can get around stock msport ride height.

Ian
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

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THETYRANT
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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 2:45 pm

kas206 wrote:
Mon Jan 08, 2018 2:30 pm
If they are 13mm longer won't that raise the rear slightly?
Same again with the E88. I don't mind a slight 10mm drop but not a rise.

I think my car also needs a alignment. The alignment was done about six months ago when I did the rear SFB. I find myself doing micro adjustments when driving and the steering has gone off centre too.
It will raise the rear compared to fitting the 135i Eibach springs, but as above i think it would probably come out around stock msport height but hard to say for sure.

If you dont mind a drop then you could just go with the 135i prokit but it drops around 15mm.
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

kas206
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Re: My Suspension quest! 130i

Post by kas206 » Mon Jan 08, 2018 2:56 pm

THETYRANT wrote:
Mon Jan 08, 2018 2:45 pm
kas206 wrote:
Mon Jan 08, 2018 2:30 pm
If they are 13mm longer won't that raise the rear slightly?
Same again with the E88. I don't mind a slight 10mm drop but not a rise.

I think my car also needs a alignment. The alignment was done about six months ago when I did the rear SFB. I find myself doing micro adjustments when driving and the steering has gone off centre too.
It will raise the rear compared to fitting the 135i Eibach springs, but as above i think it would probably come out around stock msport height but hard to say for sure.

If you dont mind a drop then you could just go with the 135i prokit but it drops around 15mm.
I'm in two minds. It's either raise the car or lower it lol. I think it will be best if I stay with my current setup and see if I get use the extra roll. If not I'll go with the Eibach pro kit with the koni sports down the line. The main reason for the koni bumpstops for the ride quality. Currently I'm happy with the way the ride quality is. As for the body roll, I think I might be able to live with it for a while. I'll keep an eye on this thread and see what you come up with when you get the koni sports and decide.

Thanks for all your help.
2008 BMW 135i - M3 Control arms, Whitelines 2 piece SFB, Koni sports shocks. BMW performance carbon boot spoiler, DEPO V1, Darlines, NBT retrofit. BMW Performance gear knob & handbrake.

M3 front anti roll bar coming soon!

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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 3:18 pm

No worries, what about M3 Antiroll bar upgrades ? i liked the way the M3 front bar felt on my last 130i and may go same again this time if i find one at right money, i found it just sharpened things up a notch and reduced the roll a little, nice way of improving things without altering ride quality too much.
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

kas206
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Re: My Suspension quest! 130i

Post by kas206 » Mon Jan 08, 2018 3:47 pm

THETYRANT wrote:
Mon Jan 08, 2018 3:18 pm
No worries, what about M3 Antiroll bar upgrades ? i liked the way the M3 front bar felt on my last 130i and may go same again this time if i find one at right money, i found it just sharpened things up a notch and reduced the roll a little, nice way of improving things without altering ride quality too much.
Front or rear one? Did a quick search and doesn't seem like they're are much on sale on eBay.
2008 BMW 135i - M3 Control arms, Whitelines 2 piece SFB, Koni sports shocks. BMW performance carbon boot spoiler, DEPO V1, Darlines, NBT retrofit. BMW Performance gear knob & handbrake.

M3 front anti roll bar coming soon!

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THETYRANT
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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 4:00 pm

kas206 wrote:
Mon Jan 08, 2018 3:47 pm
THETYRANT wrote:
Mon Jan 08, 2018 3:18 pm
No worries, what about M3 Antiroll bar upgrades ? i liked the way the M3 front bar felt on my last 130i and may go same again this time if i find one at right money, i found it just sharpened things up a notch and reduced the roll a little, nice way of improving things without altering ride quality too much.
Front or rear one? Did a quick search and doesn't seem like they're are much on sale on eBay.
Front only as M3 rear is too strong without lots of other mods like LSD etc, there a couple of different M3 ones see below copied from https://www.turnermotorsport.com/t-tech ... -sway-bars

E90/E92 M3 part# 31352283515 @ 26.5mm/Hollow
E93 M3 part# 31352283965 @ 28.0-24.0mm Hollow

They do come up 2nd hand but quickly snapped up these days, I think I paid £50 for my first one but usually £100+now with brackets etc unless getting lucky, another option is the Whiteline 27mm one which is well priced new even from Demon Thieves https://www.demon-tweeks.co.uk/performa ... -front-bar and probably cheaper elsewhere like Clark Motorsport etc -
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

kas206
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Joined: Wed Apr 05, 2017 3:55 pm

Re: My Suspension quest! 130i

Post by kas206 » Mon Jan 08, 2018 4:26 pm

THETYRANT wrote:
Mon Jan 08, 2018 4:00 pm
kas206 wrote:
Mon Jan 08, 2018 3:47 pm
THETYRANT wrote:
Mon Jan 08, 2018 3:18 pm
No worries, what about M3 Antiroll bar upgrades ? i liked the way the M3 front bar felt on my last 130i and may go same again this time if i find one at right money, i found it just sharpened things up a notch and reduced the roll a little, nice way of improving things without altering ride quality too much.
Front or rear one? Did a quick search and doesn't seem like they're are much on sale on eBay.
Front only as M3 rear is too strong without lots of other mods like LSD etc, there a couple of different M3 ones see below copied from https://www.turnermotorsport.com/t-tech ... -sway-bars

E90/E92 M3 part# 31352283515 @ 26.5mm/Hollow
E93 M3 part# 31352283965 @ 28.0-24.0mm Hollow

They do come up 2nd hand but quickly snapped up these days, I think I paid £50 for my first one but usually £100+now with brackets etc unless getting lucky, another option is the Whiteline 27mm one which is well priced new even from Demon Thieves https://www.demon-tweeks.co.uk/performa ... -front-bar and probably cheaper elsewhere like Clark Motorsport etc -
Slightly cheaper here @ £126 https://www.revolution247.com/whiteline ... 5-on-bbf43

I have soo many choices I don't know what to do lol. I might go with this as E93 ones are quite rare
2008 BMW 135i - M3 Control arms, Whitelines 2 piece SFB, Koni sports shocks. BMW performance carbon boot spoiler, DEPO V1, Darlines, NBT retrofit. BMW Performance gear knob & handbrake.

M3 front anti roll bar coming soon!

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THETYRANT
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Re: My Suspension quest! 130i

Post by THETYRANT » Mon Jan 08, 2018 4:50 pm

Haha yes too many choices my apologies for that :lol: , just drive it for awhile longer and see how it goes, if you want to upgrade further then to me i would do dampers and firmer springs as that the basics covered, if still more stiffness is needed the front ARB maybe but you need to ask how far you want to go as maybe coilovers from outset are going be better option longterm if you like it really stiff, but as you know ive tried a few and getting comfort and half decent handling is tricky!
--
Now on my 3rd 130i, this time a nice E81 in Graphite, Previously 2 x 130i and 2 x 135i

Camber plate project - http://www.babybmw.net/viewtopic.php?f=20&t=96465

Suspension Quest thread - http://www.babybmw.net/viewtopic.php?f=20&t=80208

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