Lowering spring comparison from IND.

IND-Distribution · 10-23-2015, 06:28 PM

The F8x M’s in-cabin adjustable dampers provide a tremendous range of driving experiences, and can transform the car from comfortable to sporty at the push of a button. Although most springs are a lateral move at best from a performance standpoint, many M owners choose to add lowering springs for a simple, low cost solution of lowering their car and simultaneously retaining the original BMW damping adjustment.

In order to shed some more light on the myriad of available spring options, we’ve created a simple comparison of each. IND has each type of spring in stock and measured the overall length, coil count, and coil diameter of each spring. We also tested the spring rate of each on Fall Line’s spring rate tester, to see what the actual measured rate is.

A few notes:

The springs shown here may have a variance in material. It is not possible for us to know the metallurgical makeup of the springs, and this will obviously have an impact on spring rate, ride quality, and other factors.
It is my hope that this thread will improve in depth and scope in the future, as IND gathers more information and data.
In the near future I will also measure compressed length of all of the springs, to give a clearer picture of how each spring functions.
Calculating spring rate based on OD/ID of the springs is not necessarily possible, because nearly every spring set has a complex shape, with the exception of the KW rear springs.

revolutioN99 · 10-23-2015, 06:40 PM

nice comparison

x.shell · 10-23-2015, 06:46 PM

So good. Thanks Ilia. Will link to this from the master thread.

AsiaKid · 10-23-2015, 06:48 PM

are eibach's numbers reversed for F and R..wouldnt R be super low then given that it is already lower than the front?

but this is very helpful..too bad we cant see actual compression/spring rates stats

Brosef · 10-23-2015, 11:05 PM

Awesome post. So how did the tested spring rates compare with the stated specs for each?

x.shell · 10-23-2015, 11:14 PM

I imagine most of these springs won't have a singular spring rate due to their progressive nature.

yuKon22 · 10-24-2015, 05:48 AM

Great info thx

CanAutM3 · 10-24-2015, 11:36 AM

Very informative post as usual. You guys are great contributors to the forum

.

yellowssm · 10-24-2015, 01:44 PM

nice

stranger · 10-24-2015, 01:51 PM

Great thread but no acs springs?

M4 CSL · 10-26-2015, 04:59 AM

Quote:

Originally Posted by stranger

Great thread but no acs springs?

Or Dinan ?

Worm25 · 10-29-2015, 12:09 PM

I dont think IND carries those brands.

nicknaz · 10-29-2015, 02:26 PM

Thanks for the info

notoriousjje · 11-11-2015, 12:39 PM

What is the diameter of the KW HAS front springs? Trying to figure out for the right GC camber plates.

Thanks,

Irishsig · 11-18-2015, 03:47 PM

What happened to Swift in the list?

10-23-2015, 06:28 PM	#1
IND-Distribution BimmerPost Supporting Vendor 9607 Rep 10,891 Posts Drives: G82 M4 / G87 M2 Join Date: Oct 2006 Location: Chicago iTrader: (3)	Lowering spring comparison from IND. The F8x M’s in-cabin adjustable dampers provide a tremendous range of driving experiences, and can transform the car from comfortable to sporty at the push of a button. Although most springs are a lateral move at best from a performance standpoint, many M owners choose to add lowering springs for a simple, low cost solution of lowering their car and simultaneously retaining the original BMW damping adjustment. In order to shed some more light on the myriad of available spring options, we’ve created a simple comparison of each. IND has each type of spring in stock and measured the overall length, coil count, and coil diameter of each spring. We also tested the spring rate of each on Fall Line’s spring rate tester, to see what the actual measured rate is. A few notes: The springs shown here may have a variance in material. It is not possible for us to know the metallurgical makeup of the springs, and this will obviously have an impact on spring rate, ride quality, and other factors. It is my hope that this thread will improve in depth and scope in the future, as IND gathers more information and data. In the near future I will also measure compressed length of all of the springs, to give a clearer picture of how each spring functions. Calculating spring rate based on OD/ID of the springs is not necessarily possible, because nearly every spring set has a complex shape, with the exception of the KW rear springs. __________________ IND DISTRIBUTION \| 866-963-4520 • INSTAGRAM • YOUTUBE • FACEBOOK • FLICKR
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10-23-2015, 06:40 PM	#2
revolutioN99 Banned 49 Rep 231 Posts Drives: BMW M4 (coming soon) Join Date: Mar 2009 Location: Los Angeles, CA iTrader: (0)	nice comparison
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10-23-2015, 06:46 PM	#3
x.shell ▆ ✚✚ ▆▆▆▆▆▆ 6586 Rep 5,305 Posts Drives: ▋ ▉▉ Join Date: Nov 2012 Location: ▆▆▆ ▆▆▆ ▆ iTrader: (3)	So good. Thanks Ilia. Will link to this from the master thread.
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10-23-2015, 06:48 PM	#4
AsiaKid Lieutenant 54 Rep 560 Posts Drives: GTR/Gallardo Spyder/X5 Join Date: Jul 2011 Location: Hong Kong iTrader: (0)	are eibach's numbers reversed for F and R..wouldnt R be super low then given that it is already lower than the front? but this is very helpful..too bad we cant see actual compression/spring rates stats
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10-23-2015, 11:05 PM	#5
Brosef Brigadier General 881 Rep 3,454 Posts Drives: e92 M3 Join Date: Aug 2009 Location: Chicago iTrader: (4)	Awesome post. So how did the tested spring rates compare with the stated specs for each?
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10-23-2015, 11:14 PM	#6
x.shell ▆ ✚✚ ▆▆▆▆▆▆ 6586 Rep 5,305 Posts Drives: ▋ ▉▉ Join Date: Nov 2012 Location: ▆▆▆ ▆▆▆ ▆ iTrader: (3)	I imagine most of these springs won't have a singular spring rate due to their progressive nature.
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10-24-2015, 05:48 AM	#7
yuKon22 Private First Class 43 Rep 139 Posts Drives: F80 M3 Join Date: Jul 2013 Location: Melbourne iTrader: (0)	Great info thx
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10-24-2015, 11:36 AM	#8
CanAutM3 General 21132 Rep 20,742 Posts Drives: 2021 911 turbo Join Date: Jan 2012 Location: Montreal iTrader: (1) Garage List 2022 Audi RS6 [10.00] 2021 Porsche 911 turbo [10.00]	Very informative post as usual. You guys are great contributors to the forum . __________________ Porsche 911 turbo 2021 992 GT Silver Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black
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10-24-2015, 01:44 PM	#9
yellowssm Captain 237 Rep 838 Posts Drives: 16 M4 Join Date: Dec 2007 Location: las vegas iTrader: (1)	nice __________________ 19 MBB M5C 16 Yas MarinaM4 (gone) 05 E46 M3 HPF/ProEfi Stage 2.25 (Gone )
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10-24-2015, 01:51 PM	#10
stranger Captain 235 Rep 982 Posts Drives: BMW M3 Join Date: Sep 2014 Location: London iTrader: (0)	Great thread but no acs springs?
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10-29-2015, 12:09 PM	#12
Worm25 Private First Class 205 Rep 138 Posts Drives: 2016 M4 Join Date: Jun 2012 Location: Las Vegas, NV iTrader: (2) Garage List 2016 BMW M4 [0.00]	I dont think IND carries those brands.
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10-29-2015, 02:26 PM	#13
nicknaz Lieutenant General 3189 Rep 10,509 Posts Drives: C6Z Join Date: May 2008 Location: NorCal iTrader: (0)	Thanks for the info
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11-11-2015, 12:39 PM	#14
notoriousjje Enlisted Member 2 Rep 43 Posts Drives: Clipping apexes Join Date: Mar 2012 Location: Florida iTrader: (1)	What is the diameter of the KW HAS front springs? Trying to figure out for the right GC camber plates. Thanks, __________________ 11 GT3 RS 15 F80 M3 6spd 99 E36 M3
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11-18-2015, 03:47 PM	#15
Irishsig In Hoc 315 Rep 626 Posts Drives: 2016 M4 6MT MG/SO Join Date: Jul 2013 Location: SoCal iTrader: (1) Garage List 2016 BMW M4 [0.00]	What happened to Swift in the list? __________________ 2016 M4 MG/SO 6MT- Max PSI Intakes - BMS Stage 1 - Swift Spec R - CG Precision Valve controller - 20" DPE Flowtech 5S - AA Midpipe & all the external CF goodies.
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