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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Jan-10-2019, 02:48:12 PM   #31
OneFastSicilian
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Default Re: What dampers should i buy

ive been debating shopping for new dampers and just pledged for the JRZ group buy... Going with RS1 because I simply don't need more than that and a good damper is worth the money..

I've had so many different suspension set ups and I want that One and done set up.
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Old Fri, Jan-11-2019, 11:05:20 PM   #32
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Default Re: What dampers should i buy

Any one try kw competitions?




Last edited by Jaredomin; Sat, Jan-12-2019 at 04:16:52 PM.
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Old Sat, Jan-12-2019, 02:21:26 PM   #33
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Default Re: What dampers should i buy

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Originally Posted by Kwakjoe View Post
Unsure. I’d ballpark around 3400-3800 with all hardware etc.

I will echo the same sentiment as everyone else though. The best way to advance as a driver is to do as much as you can with as little as possible.
While that is true, blown garbage suspension is counter productive and anything spent on a interim measure is ultimately wasted money.
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Old Sat, Jan-12-2019, 02:25:24 PM   #34
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Default Re: What dampers should i buy

OP. I would read through the Flat Ride thread from FCM (http://www.m3forum.net/m3forum/showthread.php?t=601913) and watch his youtube videos. There is some very valuable info in that thread and in his videos. Some agree with his methods and some don't, he has me seriously re-considering what spring rates to run.

I ran PSS9 (similar to PSS10) on street and track for a couple years and loved them. The front drivers strut started leaking and I didn't have time for a rebuild so I bought some JRZs.

If you have time for a project to rebuild the front struts I am selling the PSS9 kit for real cheap, can use the money saved on seat time. PM me if interested.


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Old Sat, Jan-12-2019, 04:15:19 PM   #35
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Default Re: What dampers should i buy

Quote:
Originally Posted by TheSt|G View Post
While that is true, blown garbage suspension is counter productive and anything spent on a interim measure is ultimately wasted money.
What would you consider interim


Quote:
Originally Posted by eacmen View Post
OP. I would read through the Flat Ride thread from FCM (http://www.m3forum.net/m3forum/showthread.php?t=601913) and watch his youtube videos. There is some very valuable info in that thread and in his videos. Some agree with his methods and some don't, he has me seriously re-considering what spring rates to run.

Ive been subd to it since the first post.
He is undoubtedly a very smart man when it comes to damping and dynamics.


Im starting to like the kw comps. I think theres alot of value to be had for 3k with them. Interested to see if anyone has ran these before.
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Old Sat, Jan-12-2019, 05:42:41 PM   #36
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Default Re: What dampers should i buy

I'm running 300/550 and it's miles better than 440/550 was. You don't have to believe in flat ride, but you at least should be aware that this car's rates, stock, are 143lb front and a very progressive 350-600 rear (forgot exact #s, but something like that).

Why only increase the front rates with aftermarket coilovers like 500/600? Makes no sense to me.
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Evolve-R Alpha N · Evolve CSL CF Airbox · Eventuri Scoop · Supersprint V1 stepped 2.5" · SS V1 S pipes 2.5" + 200 cell HFC · OE sect 2 · SCZA 2.5" sect 3 · Besian · RE pullies · fan/SAP/washer delete · CSL battery

Bilstein HD B6/Eibach 325/600lb + GC "tall" RSMs · Hotchkis front sway (med) · rear strut bar · TMS camber & subframe plates · Eibach alu rear camber arms · RE trans mounts · AKG poly subf/diff 95a · SDW RTAB · weighted ///M knob + ZHP alcantara boot + UUC DSSR + delrin bushing · Mason clutch pedal + brass bushing · TMS black pedals · delrin brake pedal bushing

OE CSL trunk · Sportline 8S 18"x8.5/9.5" · MPSS 245/275 · APEX 75mm Studs · Brembo 996 4 pot 36/40 345mm CSL & 28/30 328mm CSL · ZHP "712" rack · Pioneer/CDT/Eclipse/Kicker
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Old Sat, Jan-12-2019, 10:05:58 PM   #37
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Default Re: What dampers should i buy

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Originally Posted by TboneM3 View Post
I'm running 300/550 and it's miles better than 440/550 was. You don't have to believe in flat ride, but you at least should be aware that this car's rates, stock, are 143lb front and a very progressive 350-600 rear (forgot exact #s, but something like that).



Why only increase the front rates with aftermarket coilovers like 500/600? Makes no sense to me.
T, I think there are 2 problems overall. 1) The industry does not valve aftermarket shocks per Shaikh's flat ride methodology and tries to cater more toward sportier/dual duty/track use cases (per Shaikh this is mostly marketing that stiffer is better), which require stiffer springs to work with the valving produced. 2) Dropping front spring rates creates a few issues with improperly valved/matched shocks for those who hit the track, to the point that you have to start really figuring things out in terms of wheel fitment/bottoming/scraping, raising the ride height, increasing spring preload, etc for when you slam the brakes and dive into corners at 100mph and ride on bump stops, even without aero.

You simply cant take a shock valved for a 500 or 600 spring and drop a 300 or 400 spring rate on it and expect amazingness. Sure on the street it might feel good and give you a flat ride, but the setup starts falling apart a bit when you start pushing it. I'm especially running into some trouble with Ohlins with this methodology since spring preload and ride height are the same adjustment and Ohlins shocks already have limited travel as it is.

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Happy to help with VANOS or any other DIY job around NorCal. Have various specialty tools (VANOS, RTAB, engine bar, valve adjustment, tranny jack, ball joint separator, pilot bearing puller, tap&die kit, etc).
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Old Sat, Jan-12-2019, 11:01:32 PM   #38
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Default Re: What dampers should i buy

Quote:
Originally Posted by mrgizmo04 View Post
T,

You simply cant take a shock valved for a 500 or 600 spring and drop a 300 or 400 spring rate on it and expect amazingness.
If you buy sht dampers that may be the case

Everything in suspension is a compromise.
A jack of all trades is a master of none!!
“Dual duty”=
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Old Sat, Jan-12-2019, 11:21:58 PM   #39
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Default Re: What dampers should i buy

Quote:
Originally Posted by Jaredomin View Post
If you buy sht dampers that may be the case



Everything in suspension is a compromise.

A jack of all trades is a master of none!!

“Dual duty”=
I dont think it has to do with sht dampers and more to do with a range of oscillation frequencies that can be paired with a certain spring rate.

Even high end MCS and JRZ need to be revalved/rebuilt to run spring rates that are drastically different than what comes with them originally. Some will take about +/- 20% spring rate difference, after that shocks need to be re-optimized for a different set of frequencies.

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'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: VANOS, WPC rod bearings, full SS (SS stepped V1 headers, catted S1, stock S2, SS sport), AFD E85 Proflex kit, Ohlins R&T/Hyperco 375f Swift 672r/GC street tops and camber plates, ST40 355 pfc08, 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, Sachs clutch/flywheel, rear main, Beyer driveshaft, valve adjustment, cooling refresh.

Happy to help with VANOS or any other DIY job around NorCal. Have various specialty tools (VANOS, RTAB, engine bar, valve adjustment, tranny jack, ball joint separator, pilot bearing puller, tap&die kit, etc).
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Old Sat, Jan-12-2019, 11:30:45 PM   #40
TboneM3
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Default Re: What dampers should i buy

I didn't say anthing about dampers, just spring rates in relation to the flatride stuff.

Why triple or quad the front rates, but then barely increase the rear rates 110-150% ?
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_


Evolve-R Alpha N · Evolve CSL CF Airbox · Eventuri Scoop · Supersprint V1 stepped 2.5" · SS V1 S pipes 2.5" + 200 cell HFC · OE sect 2 · SCZA 2.5" sect 3 · Besian · RE pullies · fan/SAP/washer delete · CSL battery

Bilstein HD B6/Eibach 325/600lb + GC "tall" RSMs · Hotchkis front sway (med) · rear strut bar · TMS camber & subframe plates · Eibach alu rear camber arms · RE trans mounts · AKG poly subf/diff 95a · SDW RTAB · weighted ///M knob + ZHP alcantara boot + UUC DSSR + delrin bushing · Mason clutch pedal + brass bushing · TMS black pedals · delrin brake pedal bushing

OE CSL trunk · Sportline 8S 18"x8.5/9.5" · MPSS 245/275 · APEX 75mm Studs · Brembo 996 4 pot 36/40 345mm CSL & 28/30 328mm CSL · ZHP "712" rack · Pioneer/CDT/Eclipse/Kicker

Last edited by TboneM3; Sat, Jan-12-2019 at 11:36:08 PM.
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Discussing What dampers should i buy in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)