Just got some JRZ RS dampers in!

Tonester · 02-04-2011, 12:43 AM

I'm happy to tell you guys that there is now another suspension option for the E9xM3 chassis. The JRZ RS and RS Pro is now available and its no damper to be overlooked, these are a race bred damper that has been designed/engineered for street/track use.

The JRS RS/RS pro are both 2-way dampers the only difference is that the RS Pro has external reservoirs that allow the end user to adjust the nitrogen pressure. The JRZ RS also does allow for nitrogen pressure adjustment however they would have to be performed by an authorized JRZ service center. (If purchased from me I can have JRZ set the Nitrogen pressure to a custom spec to suit your driving needs.)

The professional photos from JRZ are for an E9x Non-M, the kit for the E9xM3 will be very similar except for the rear shock mounting style. The photos took are for an E46M3, I know its not something you might be interested but its to show you guys the details/build quality of the JRZ's.

We will have the E9xM3 setup in our hands in a couple of weeks... I'll update the thread later with those photos.

E9X Non-M

E46M3

[/b]

rzm3 · 02-04-2011, 02:40 AM

When will they be releasing their E9x application?

aus · 02-04-2011, 09:23 AM

So pretty... and NICE brakes in the back too!!

Tonester · 02-04-2011, 04:30 PM

Quote:

Originally Posted by rldzhao

When will they be releasing their E9x application?

We're currently waiting for them to arrive, they should be here in roughly 2 weeks.

Auto · 02-05-2011, 01:30 AM

Looks good!

Monkeycheese101 · 02-07-2011, 03:49 PM

how much?

Tonester · 02-07-2011, 05:13 PM

Quote:

Originally Posted by Monkeycheese101

how much?

Can't post pricing here, this thread is for photos/technical information.

I'll PM you.

aus · 02-07-2011, 05:26 PM

Can you at least post MSRP in the Sponsor section?

STALKER · 02-07-2011, 06:05 PM

I ordered a set from RennSpec a few weeks ago. I will post a full review when I have them installed and properly set up.

Jaypod · 02-07-2011, 06:07 PM

Quote:

Originally Posted by STALKER

I ordered a set from RennSpec a few weeks ago. I will post a full review when I have them installed and properly set up.

signes · 02-07-2011, 06:09 PM

Quote:

Originally Posted by STALKER

I ordered a set from RennSpec a few weeks ago. I will post a full review when I have them installed and properly set up.

Can't wait to hear the review. These were the best for the E46.

STALKER · 02-07-2011, 06:17 PM

Quote:

Originally Posted by signes

Can't wait to hear the review. These were the best for the E46.

Hopefully they work just as well on the E9X M3 platform.
I went with 500/700 springs, plus helper springs.

rzm3 · 02-07-2011, 09:07 PM

Quote:

Originally Posted by STALKER

I ordered a set from RennSpec a few weeks ago. I will post a full review when I have them installed and properly set up.

Cool. But do know that the guy who owns Moton co-founded JRZ. Hope you like this set better.

STALKER · 02-07-2011, 09:25 PM

Quote:

Originally Posted by rldzhao

Cool. But do know that the guy who owns Moton co-founded JRZ. Hope you like this set better.

Ya, Im aware of how both companies started. Me too.

rzm3 · 02-07-2011, 09:32 PM

Also just as a comment, 700 in the back may be a bit low and cause more understeer. I have 750 and my car still understeers slightly. If you haven't purchased the springs yet consider something higher.

STALKER · 02-07-2011, 09:36 PM

Quote:

Originally Posted by rldzhao

Also just as a comment, 700 in the back may be a bit low and cause more understeer. I have 750 and my car still understeers slightly. If you haven't purchased the springs yet consider something higher.

Thanks, I will consider it.
What rate you running up front?

rzm3 · 02-07-2011, 10:05 PM

500

aus · 02-07-2011, 10:30 PM

Could you guys share how Moton/JRZ are related?

mastek · 02-08-2011, 03:38 PM

Those are some counter-productive (historically speaking) spring rates.

The e46m3 Race Cars (factory and private) would typically run 1000 front and 350 rear with no rear sway bar.
The idea is that a front engine/rear wheel drive car needs a stiff front end to turn in --- and a soft rear end to hook up.
I ran 850/650 on my stripped (but not race caged) e46m3 with great success.

Not sure about all the "Continental Challenge" e92m3 guys -- but I would bet that they too are running a soft setup in the back as well.
I plan on finding out soon.

HP Autosport · 02-09-2011, 01:14 AM

Quote:

Originally Posted by rldzhao

Cool. But do know that the guy who owns Moton co-founded JRZ. Hope you like this set better.

And one of the JRZ guys used to work for Koni!

Quote:

Originally Posted by mastek

Those are some counter-productive (historically speaking) spring rates.

The e46m3 Race Cars (factory and private) would typically run 1000 front and 350 rear with no rear sway bar.
The idea is that a front engine/rear wheel drive car needs a stiff front end to turn in --- and a soft rear end to hook up.
I ran 850/650 on my stripped (but not race caged) e46m3 with great success.

Not sure about all the "Continental Challenge" e92m3 guys -- but I would bet that they too are running a soft setup in the back as well.
I plan on finding out soon.

Factory race cars would typcially run a coilover in the rear as well so the 350 spring rate is very close to the actual wheel rate.

E9x chassis has a different rear suspension with different motion ratios, what worked well on the E46 chassis doesn't really work well on the E9x cars, a few suspension tuner found out the hard way by trial and error instead of doing the math first to get least somewhat close.

mastek · 02-09-2011, 05:59 PM

Quote:

Originally Posted by HP Autowerks

And one of the JRZ guys used to work for Koni!

Factory race cars would typcially run a coilover in the rear as well so the 350 spring rate is very close to the actual wheel rate.

E9x chassis has a different rear suspension with different motion ratios, what worked well on the E46 chassis doesn't really work well on the E9x cars, a few suspension tuner found out the hard way by trial and error instead of doing the math first to get least somewhat close.

I hear ya -- but this 'difference' in the rear suspension is not a 'dramatic' one.
And these spring rate principles are derived from years of front engined/rwd cars.
It makes sense doesnt it??
What rates are you running on that e90 you accomplished that awesome time @ Laguna with?

HP Autosport · 02-09-2011, 06:18 PM

Quote:

Originally Posted by mastek

I hear ya -- but this 'difference' in the rear suspension is not a 'dramatic' one.
And these spring rate principles are derived from years of front engined/rwd cars.
It makes sense doesnt it??
What rates are you running on that e90 you accomplished that awesome time @ Laguna with?

At that time we(Jeff Tyler and I) were still sorting out the chassis and spring rates to his driving style and get the car ready for RTA. We were still on 400F and 800R with street tire. I believe Jeff did a 1:41, but the car should be able to do 1:39's after some tweaking. I guess we could have tried R-comps and take off a couple of seconds too, but since our racing class only allow street tires with thread wear 140 or higher, that was what we tuned our suspension on.

We eventually went to 500F and 900R after adding a 10cm front splitter and APR GTC-300 rear wing.

02-04-2011, 12:43 AM	#1
Tonester Banned 25 Rep 178 Posts Drives: LSB M3 Join Date: Oct 2007 Location: So Cali iTrader: (0)	Just got some JRZ RS dampers in! I'm happy to tell you guys that there is now another suspension option for the E9xM3 chassis. The JRZ RS and RS Pro is now available and its no damper to be overlooked, these are a race bred damper that has been designed/engineered for street/track use. The JRS RS/RS pro are both 2-way dampers the only difference is that the RS Pro has external reservoirs that allow the end user to adjust the nitrogen pressure. The JRZ RS also does allow for nitrogen pressure adjustment however they would have to be performed by an authorized JRZ service center. (If purchased from me I can have JRZ set the Nitrogen pressure to a custom spec to suit your driving needs.) The professional photos from JRZ are for an E9x Non-M, the kit for the E9xM3 will be very similar except for the rear shock mounting style. The photos took are for an E46M3, I know its not something you might be interested but its to show you guys the details/build quality of the JRZ's. We will have the E9xM3 setup in our hands in a couple of weeks... I'll update the thread later with those photos. E9X Non-M E46M3 [/b]
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02-04-2011, 02:40 AM	#2
rzm3 Moderator 675 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	When will they be releasing their E9x application?
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02-04-2011, 09:23 AM	#3
aus Major General 894 Rep 9,034 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	So pretty... and NICE brakes in the back too!! __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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02-05-2011, 01:30 AM	#5
Auto Captain 173 Rep 714 Posts Drives: MB CLS 63 AMG Join Date: Oct 2006 Location: Sweden iTrader: (0)	Looks good!
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02-07-2011, 03:49 PM	#6
Monkeycheese101 Private First Class 1 Rep 101 Posts Drives: 2008 m3 Join Date: Oct 2007 Location: bay area iTrader: (0)	how much?
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02-07-2011, 05:26 PM	#8
aus Major General 894 Rep 9,034 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Can you at least post MSRP in the Sponsor section? __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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02-07-2011, 06:05 PM	#9
STALKER Brigadier General 169 Rep 3,833 Posts Drives: 997.2 GT3, Golf R Join Date: Feb 2009 Location: Toronto, ON iTrader: (5)	I ordered a set from RennSpec a few weeks ago. I will post a full review when I have them installed and properly set up. __________________
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02-07-2011, 09:32 PM	#15
rzm3 Moderator 675 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	Also just as a comment, 700 in the back may be a bit low and cause more understeer. I have 750 and my car still understeers slightly. If you haven't purchased the springs yet consider something higher.
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02-07-2011, 10:05 PM	#17
rzm3 Moderator 675 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	500
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02-07-2011, 10:30 PM	#18
aus Major General 894 Rep 9,034 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Could you guys share how Moton/JRZ are related? __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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02-08-2011, 03:38 PM	#19
mastek e36s54, e70x5d 151 Rep 1,723 Posts Drives: slow Join Date: Aug 2008 Location: Los Angeles, CA iTrader: (15)	Those are some counter-productive (historically speaking) spring rates. The e46m3 Race Cars (factory and private) would typically run 1000 front and 350 rear with no rear sway bar. The idea is that a front engine/rear wheel drive car needs a stiff front end to turn in --- and a soft rear end to hook up. I ran 850/650 on my stripped (but not race caged) e46m3 with great success. Not sure about all the "Continental Challenge" e92m3 guys -- but I would bet that they too are running a soft setup in the back as well. I plan on finding out soon.
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