Linear springs for KW V1 / ST

1speedbike · 03-25-2013, 12:24 PM

I know HPA sells linear swift springs that work with KW V2 and V3, but have to be machined down by 1 mm to install correctly.

http://www.hpashop.com/KW-Swift-Spri...conversion.htm

Anyone know if these work with KW V1 or ST coilovers (which I assume are the same) as well?

If not, anyone know of any other linear springs that could work with STs?

If it can work what would be a good spring rate for our cars that's more aggressive than the stock KW progressive ones, but not too much for the shocks to handle?

ParkNuts · 03-25-2013, 10:32 PM

I'm also interested. I've seen Harold report that swift springs are much more durable, more consistent and better performers than the stock units for those. I wasn't aware of the machining needed tho. Hope your question gets addressed by those in the know.

Zombie1 · 03-26-2013, 05:34 AM

I'd like to know as well

HP Autosport · 03-27-2013, 09:52 PM

Quote:

Originally Posted by 1speedbike

I know HPA sells linear swift springs that work with KW V2 and V3, but have to be machined down by 1 mm to install correctly.

http://www.hpashop.com/KW-Swift-Spri...conversion.htm

Anyone know if these work with KW V1 or ST coilovers (which I assume are the same) as well?

If not, anyone know of any other linear springs that could work with STs?

If it can work what would be a good spring rate for our cars that's more aggressive than the stock KW progressive ones, but not too much for the shocks to handle?

Yes, the conversion can work with V1 and ST, but you will need to run lower rates so not to under damp the suspension. I recommend 280F and 560R.

Remember, ST and V1 have progressive front springs, the upgraded Swifts will be linear rate so you will get more consistent performance just from that aspect alone.

Let us know if you have further questions via PM or email as it is hard to keep track all the threads we have responded to.

1speedbike · 03-28-2013, 11:02 AM

Thank you so much for the response! At first I was looking at 448f/616r but I guess that's too much for the calibration on the shocks to handle :P

Would you recommend getting just the fronts, or is there really that big of a performance difference when getting both?

03-25-2013, 12:24 PM	#1
1speedbike Brigadier General 732 Rep 3,274 Posts Drives: 2022 X4 M40i, 2008 135i Join Date: Jun 2008 Location: MKE iTrader: (15)	Linear springs for KW V1 / ST I know HPA sells linear swift springs that work with KW V2 and V3, but have to be machined down by 1 mm to install correctly. http://www.hpashop.com/KW-Swift-Spri...conversion.htm Anyone know if these work with KW V1 or ST coilovers (which I assume are the same) as well? If not, anyone know of any other linear springs that could work with STs? If it can work what would be a good spring rate for our cars that's more aggressive than the stock KW progressive ones, but not too much for the shocks to handle? __________________ 2022 X4 M40i - 2008 135i - 2015 F700GS On Order - 2024 i4 M50 Scruffy's gonna die the way he lived... Mmhm.
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03-25-2013, 10:32 PM	#2
ParkNuts First Lieutenant 99 Rep 370 Posts Drives: 2021 Tesla Model 3 Performance Join Date: Apr 2011 Location: Dallas iTrader: (0)	I'm also interested. I've seen Harold report that swift springs are much more durable, more consistent and better performers than the stock units for those. I wasn't aware of the machining needed tho. Hope your question gets addressed by those in the know.
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03-26-2013, 05:34 AM	#3
Zombie1 Colonel 172 Rep 2,347 Posts Drives: BMW 135i 2010 Join Date: Jul 2012 Location: Island long iTrader: (6)	I'd like to know as well __________________ Mods:-Berkexhaust -alpinaB3flash -CobbAP -Cobb FMIC -ER charge pipe tialQ bov -M3 front sway bar -M3 subframe bushings -M3 front upper and lower control arms -M3 guide rods -M3 rear upper control arms -Mfactory LSD -defiv lockdown kit -TC Kline SA coilovers /camber plates- HP rear toe arms
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03-28-2013, 11:02 AM	#5
1speedbike Brigadier General 732 Rep 3,274 Posts Drives: 2022 X4 M40i, 2008 135i Join Date: Jun 2008 Location: MKE iTrader: (15)	Thank you so much for the response! At first I was looking at 448f/616r but I guess that's too much for the calibration on the shocks to handle :P Would you recommend getting just the fronts, or is there really that big of a performance difference when getting both? __________________ 2022 X4 M40i - 2008 135i - 2015 F700GS On Order - 2024 i4 M50 Scruffy's gonna die the way he lived... Mmhm.
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