My Suspension quest! 130i

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kas206
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Re: My Suspension quest! 130i

Post by kas206 » Thu Jan 11, 2018 1:37 pm

THETYRANT wrote:
Thu Jan 11, 2018 12:06 pm
kas206 wrote:
Thu Jan 11, 2018 11:44 am
6 variations? BMW going about OTT lol.

So would it be best to go with the 420lb/in T2 version then? I'll send a message to Cotswolds and see what they say.

Thanks
Haha yes at least 6 from what ive seen possibly more!.... i would and most likely will go myself with T2 rears and also for me the firmer T3 fronts as well.

Will be interesting to see what bmw give for your car, i imagine it will be the softer ones as it does seem more common from what ive seen.
Sent Cotswolds a PM. Let's see what they come back with. Hopefully they're not too hard and cause the ride to get too hard or it will be back to square one, trying to improve the ride quality :lol:
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 » Thu Jan 11, 2018 1:48 pm

kas206 wrote:
Thu Jan 11, 2018 1:37 pm

Sent Cotswolds a PM. Let's see what they come back with. Hopefully they're not too hard and cause the ride to get too hard or it will be back to square one, trying to improve the ride quality :lol:
Ive used very similar rate spring in rear without an issue when I had Eibach Prokit on my last 130i, you do feel its firmer at first but nothing like the harsh/bouncy feel from the stock bumpstop. I actually had upto 570lb rear springs in that car when I tried the KW SC coilovers and surprisingly the rear didn't feel bad at all as being well matched to damper helps, im sure with Koni dampers I could go 500lb in rear without impacting ride quality too much, just not sure which way to go yet but Koni's are due tomorrow so will have t make up mind!

When I contacted Cotswolds about those firmer BMWP springs there were about £100 a pair but had to come from Germany so small delay, another options is could just get 130i Eibach Pro-kit or just the rear springs which would give you pretty much same thing looking at the specs if you cant wait.
--
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 » Thu Jan 11, 2018 3:03 pm

THETYRANT wrote:
Thu Jan 11, 2018 1:48 pm
kas206 wrote:
Thu Jan 11, 2018 1:37 pm

Sent Cotswolds a PM. Let's see what they come back with. Hopefully they're not too hard and cause the ride to get too hard or it will be back to square one, trying to improve the ride quality :lol:
Ive used very similar rate spring in rear without an issue when I had Eibach Prokit on my last 130i, you do feel its firmer at first but nothing like the harsh/bouncy feel from the stock bumpstop. I actually had upto 570lb rear springs in that car when I tried the KW SC coilovers and surprisingly the rear didn't feel bad at all as being well matched to damper helps, im sure with Koni dampers I could go 500lb in rear without impacting ride quality too much, just not sure which way to go yet but Koni's are due tomorrow so will have t make up mind!

When I contacted Cotswolds about those firmer BMWP springs there were about £100 a pair but had to come from Germany so small delay, another options is could just get 130i Eibach Pro-kit or just the rear springs which would give you pretty much same thing looking at the specs if you cant wait.

Let's see what Cotswolds comes back with. As eibach as slightly longer I would rather go with the performance ones as they are the same length. Or are they?
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 » Thu Jan 11, 2018 3:15 pm

kas206 wrote:
Thu Jan 11, 2018 3:03 pm

Let's see what Cotswolds comes back with. As eibach as slightly longer I would rather go with the performance ones as they are the same length. Or are they?
Eibach pro springs are a shorter than those BMWP (how much depending which ones you get) and also slightly softer rate as well, to keep all info together see below for info copied off me earlier post, as you can see 130i rear Eibach are close to BMWP if all published data and TUV cert etc is correct.

E82 - 135i Coupe Eibach Prokit Rear spring @ 293mm ~ 415lb
E88 - 135i Cabrio Eibach Prokit Rear spring @ 300mm ~ 415lb

E81/7 - 130i Hatch Eibach Prokit Rear spring @ 307mm ~ 415lb

E82 - 135i Coupe BMWP T2 Rear spring @ 310mm ~ 420lb


Actual spring rate to the wheels is a lot less due to where the spring is located on wishbone which alters motion ratio, on rears ratio is 0.563 so for example a 420lb spring only works out around 236lb at the wheel, still pretty soft for a 1500kg car really.
--
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 » Thu Jan 11, 2018 3:41 pm

THETYRANT wrote:
Thu Jan 11, 2018 3:15 pm
kas206 wrote:
Thu Jan 11, 2018 3:03 pm

Let's see what Cotswolds comes back with. As eibach as slightly longer I would rather go with the performance ones as they are the same length. Or are they?
Eibach pro springs are a shorter than those BMWP (how much depending which ones you get) and also slightly softer rate as well, to keep all info together see below for info copied off me earlier post, as you can see 130i rear Eibach are close to BMWP if all published data and TUV cert etc is correct.

E82 - 135i Coupe Eibach Prokit Rear spring @ 293mm ~ 415lb
E88 - 135i Cabrio Eibach Prokit Rear spring @ 300mm ~ 415lb

E81/7 - 130i Hatch Eibach Prokit Rear spring @ 307mm ~ 415lb

E82 - 135i Coupe BMWP T2 Rear spring @ 310mm ~ 420lb


Actual spring rate to the wheels is a lot less due to where the spring is located on wishbone which alters motion ratio, on rears ratio is 0.563 so for example a 420lb spring only works out around 236lb at the wheel, still pretty soft for a 1500kg car really.
So is the BMWP spring shorter than the OEM I have now or longer?
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 » Thu Jan 11, 2018 3:50 pm

kas206 wrote:
Thu Jan 11, 2018 3:41 pm


So is the BMWP spring shorter than the OEM I have now or longer?
It should be shorter as they quote car being lowered when fitting BMWP pacakage, but i havent got a stock msport spring here to measure (stupidly skipped them all last year!) to say how the different, only way to be sure is to take a spring out and measure it which isnt a big job really, also the stock spring is only 350lb in the rear of 135i so will sag more under weight of car.
--
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 » Thu Jan 11, 2018 4:19 pm

THETYRANT wrote:
Thu Jan 11, 2018 3:50 pm
kas206 wrote:
Thu Jan 11, 2018 3:41 pm


So is the BMWP spring shorter than the OEM I have now or longer?
It should be shorter as they quote car being lowered when fitting BMWP pacakage, but i havent got a stock msport spring here to measure (stupidly skipped them all last year!) to say how the different, only way to be sure is to take a spring out and measure it which isnt a big job really, also the stock spring is only 350lb in the rear of 135i so will sag more under weight of car.
Thanks alot for all the info. Just waiting for Cotswold to get back to me. I'll post back on what they recommend.
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 kas206 » Fri Jan 12, 2018 1:10 pm

Just got a quote from Cotswold for £93.50 for the rear performance springs. So some weird reason they're refusing to give the part number :? So I'm not sure if it the 420lb ones or not. Sent them a message back asking them to supply me the spring rate details.
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 » Fri Jan 12, 2018 1:24 pm

BMW don't publish spring rates so don't think you will get joy with that, if you want the 420lb ones use the part number I gave you :)

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 kas206 » Fri Jan 12, 2018 2:12 pm

THETYRANT wrote:
Fri Jan 12, 2018 1:24 pm
BMW don't publish spring rates so don't think you will get joy with that, if you want the 420lb ones use the part number I gave you :)

Ian
Yeah, I'll get a quote from them now with that part number. Thanks
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 kas206 » Fri Jan 12, 2018 2:38 pm

Just got quoted £99 for 420lb ones from Cotswold (part number 33536788899) I'm guessing they're different to the ones they quoted me for £93.50 I sent them my Vin and that's what they recommend me. He also said that there is only 1 version for my car. Not sure what the difference is between the 2.
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 marco_polo » Fri Jan 12, 2018 2:44 pm

I'm not knocking Cotswold (or BMW for that matter), but just because they will tell you E90 M3 / 135i / etc parts aren't listed for your VIN, it doesn't mean they won't physically fit.

If you're going off piste, you have to ignore them occasionally.
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THETYRANT
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Re: My Suspension quest! 130i

Post by THETYRANT » Fri Jan 12, 2018 3:12 pm

kas206 wrote:
Fri Jan 12, 2018 2:38 pm
Just got quoted £99 for 420lb ones from Cotswold (part number 33536788899) I'm guessing they're different to the ones they quoted me for £93.50 I sent them my Vin and that's what they recommend me. He also said that there is only 1 version for my car. Not sure what the difference is between the 2.
The ones for you vin are probably one of the softer variants, as Marco says if your willing to go off piste they wont be able to help with fine details like this, they generally only know what the parts system tells them and they are correct that it only 1 lists for your vin which is what BMW recommend for options fitted to your car when new, as in the weight of car, if your worried about going off piste you can stick with what the recommend but there are at least 5 others that will fit (probably a lot more with all the E90 models also fitting onto E8x chassis) including the numbers ive quoted.

All depends if your willing to try it or stick with BMW recommendation to your vin number

Im going to be fitting the same springs and thats on a 130 :)

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 » Fri Jan 12, 2018 3:54 pm

THETYRANT wrote:
Fri Jan 12, 2018 3:12 pm
kas206 wrote:
Fri Jan 12, 2018 2:38 pm
Just got quoted £99 for 420lb ones from Cotswold (part number 33536788899) I'm guessing they're different to the ones they quoted me for £93.50 I sent them my Vin and that's what they recommend me. He also said that there is only 1 version for my car. Not sure what the difference is between the 2.
The ones for you vin are probably one of the softer variants, as Marco says if your willing to go off piste they wont be able to help with fine details like this, they generally only know what the parts system tells them and they are correct that it only 1 lists for your vin which is what BMW recommend for options fitted to your car when new, as in the weight of car, if your worried about going off piste you can stick with what the recommend but there are at least 5 others that will fit (probably a lot more with all the E90 models also fitting onto E8x chassis) including the numbers ive quoted.

All depends if your willing to try it or stick with BMW recommendation to your vin number

Im going to be fitting the same springs and thats on a 130 :)

Ian
Sorry, but what is piste? :lol:

Think I'll go for the harder ones @ 420lb than what BMW recommend. I'll order them next week. Thanks
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 » Fri Jan 12, 2018 4:00 pm

kas206 wrote:
Fri Jan 12, 2018 3:54 pm
Sorry, but what is piste? :lol:

Think I'll go for the harder ones @ 420lb than what BMW recommend. I'll order them next week. Thanks
off-piste = so as to deviate from what is conventional, usual, or expected. :D
I think they are best ones for you to firm up the rear of car, its a shame its not easier to get 500lb rear springs for these as im sure it would be a good setup with decent dampers, currently to get 500lb its Spec-R springs which need to come from USA and are quite pricey and possibly a little low, or get the HPA coilover conversion kit which allows normal 2.5" springs in rear, might see if i can fab something up :D

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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