E9X M3 JRZ RS PRO track guys

[kaiv]

Please share the following:

1) your spring rates
2) your compression settings
3) your rebound settings
4) your alignment

Note: No understeer por favor

THANKS!

[admranger]

Originally Posted by kaiv

Please share the following:

1) your spring rates
2) your compression settings
3) your rebound settings
4) your alignment

Note: No understeer por favor

THANKS!

1) stiff
2) as much as I can but not so much that the car skates
3) soft enough so the car doesn't jack down, stiff enough to control the spring rates quoted in 1.
4) -2 (though you can go to -2.7 for track time), -1.8, zero, 1/16th each side (though I'm trying a bit less than that to see what happens...)

HTH.

[kaiv]

Not all at once please -_-

Originally Posted by admranger

1) stiff
2) as much as I can but not so much that the car skates
3) soft enough so the car doesn't jack down, stiff enough to control the spring rates quoted in 1.
4) -2 (though you can go to -2.7 for track time), -1.8, zero, 1/16th each side (though I'm trying a bit less than that to see what happens...)

HTH.

Just ordered the little engineer in your pocket to keep with my track gear :-)

[AriuSen]

my turn to try your coilover! Haha.....i was goin to get one, but I wanted to test before to see if its really worth it.
anyway great acquisition!
might contact you soon for rear sway bar sub diff bushing installation =)

[AriuSen]

Originally Posted by admranger

1) stiff
2) as much as I can but not so much that the car skates
3) soft enough so the car doesn't jack down, stiff enough to control the spring rates quoted in 1.
4) -2 (though you can go to -2.7 for track time), -1.8, zero, 1/16th each side (though I'm trying a bit less than that to see what happens...)

HTH.

couldnt be less specific? LOL

[kaiv]

Guess I'll start:

1) 550F / 800 R (stock rear spring location)
2) don't know yet
3) don't know yet
4) Starting with -3F 0 toe, -2R 1/8th total toe in

I have yet to take the car to the track with this setup but I did a preliminary mountain test run. Some rough roads, I set the damper settings at 3 click from full soft (all 4 corners, both compression and reb) and the car remained composed, never skipped, and handled all the imperfections incredibly well.

Now with that said I don't drive like crazy on public roads so far it appeared the car rotated properly just as I like it, despite being on the skinny OE tires on that one run.

So everything looks promising thus far (as far as balance is concerned) but some basic/proven track settings "to start with" would be helpful. I remain mostly clueless about tuning the dampers

[PrimeBMW]

Didn't the vendor you bought them from have a base setting to work off of?

[kaiv]

Originally Posted by PrimeBMW

Didn't the vendor you bought them from have a base setting to work off of?

I bought them second hand from a private party. The original vendor I would not trust since they apparently had the previous owner's car setup with coilover rear type of spring rates in the original spring location!

So ya, I need you guys' help ^^

[admranger]

Originally Posted by m3SennA

couldnt be less specific? LOL

Maybe.













While it was posted as a joke, it does contain a significant amount of information on how to set the car up. There's a ton left out too (like actual spring rates) b/c I just don't know on the E9xM3 chassis...

[kaiv]

Why do I feel like people are seeing this thread but choosing not to reply?

[Sleeper519]

Originally Posted by kaiv

Why do I feel like people are seeing this thread but choosing not to reply?

maybe because most who read this aren't E9X JRZ RS PRO track guys and can't provide the specific info you are seeking.

[M3 Number 86]

Originally Posted by kaiv

Why do I feel like people are seeing this thread but choosing not to reply?

OPEN TEST. THIS FRIDAY. BUTTONWILLOW.

SUSPENSION SETUP DAY. I'm going to play/adjust my clubsports.

Sorry for all caps. Let's GO!

[kaiv]

Originally Posted by Sleeper519

maybe because most who read this aren't E9X JRZ RS PRO track guys and can't provide the specific info you are seeking.

I tend to forget this isn't anything like the E46 community

Originally Posted by M3 Number 86

OPEN TEST. THIS FRIDAY. BUTTONWILLOW.

SUSPENSION SETUP DAY. I'm going to play/adjust my clubsports.

Sorry for all caps. Let's GO!

I would love to but after the last time I said never again. Took me 4-5 hours to get back to SD. Weekday traffic is terrible!

[///Mobbin]

I would contact Bryan Hise at JRZ, he'll know what other people have done on e9x and is regarded as quite helpful on other platforms (so I've heard).

http://www.jrzsuspension.com/contact/usa.html

[kaiv]

Originally Posted by ///Mobbin

I would contact Bryan Hise at JRZ, he'll know what other people have done on e9x and is regarded as quite helpful on other platforms (so I've heard).

http://www.jrzsuspension.com/contact/usa.html

Thanks, I appreciate the reply.

I've actually been in contact with Bryan via email.
His replies tend be short and somewhat vague. He admittedly didn't know the difference between a helper spring and tender spring (I do ha). My last email asking about specs remains unanswered despite me following up once.
With all due respect to the COO of JRZ USA, it doesn't seem like he knows much about suspension or setup

[///Mobbin]

Originally Posted by kaiv

Thanks, I appreciate the reply.

I've actually been in contact with Bryan via email.
His replies tend be short and somewhat vague. He admittedly didn't know the difference between a helper spring and tender spring (I do ha). My last email asking about specs remains unanswered despite me following up once.
With all due respect to the COO of JRZ USA, it doesn't seem like he knows much about suspension or setup

That's surprising as I thought he had a good rep and I've heard JRZ is very much on top of their customer support (perhaps try and give him a call?).

Also, check out Bryan explaining the JRZ RS Pro's at about 3:10 in this YouTube video:
https://www.youtube.com/watch?v=4SvIcrfKG2I

I had previously decided on a JRZ suspension setup for my last car before I scrapped the plan and sold my car. Curious to hear how it goes for you as I know I'll be shopping suspensions again soon. Good luck and please keep us posted!

[italyix]

OP, if you are looking for recommended spring rates, do yourself a favor and calculate your optimal spring rates using your corner weights. I went though this exercise and figured out that my Nitrons had to be 450 front and 550 rear (I am switching to true rear coil over, hence the low rate). You first need to figure out what spring frequency you need to be at, I chose 2.0 hz/sec for the front and 2.2hz/sec for the rears. From there use the calculations (Eibach has a nice technical breakdown on how to do this) to determine your spring rates. I posted how to do this somewhere on the forum as well.

Hope this helps you!

[Exclusivs]

Kaiv reach out to Platteforme AG / & Fall-line to get some perspectives. Both seem well versed in JRZ applications on the E9X platform and may be able to guide you in the right direction on your setup. Keep us posted!

[chris82]

Originally Posted by kaiv

Thanks, I appreciate the reply.

I've actually been in contact with Bryan via email.
His replies tend be short and somewhat vague. He admittedly didn't know the difference between a helper spring and tender spring (I do ha). My last email asking about specs remains unanswered despite me following up once.
With all due respect to the COO of JRZ USA, it doesn't seem like he knows much about suspension or setup

When I tried to ask him about whether or not I should change my spring rates for my RS Two from the rates I had with my RS1s, he kept saying "if you like them then stay with them" and I did so I didn't change them. but with all due respect, he was incredibly helpful with my JRZ purchase, and he knows his stuff. You're better off calling him, because when I dealt with him his email responses were also very short, but talking with him he provides whatever you need to know.

Originally Posted by Sleeper519

maybe because most who read this aren't E9X JRZ RS PRO track guys and can't provide the specific info you are seeking.

Exactly, I don't have an M3 lol

[okusa]

I've been on RS Pro for 18 months or so. They have always performed well but the smartest thing I did was to get a proper height adjustment and alignment over at West End in Gardena. That totally transformed my car. My specs are:

3,746 lbs with me and 1/3 tank
Springs are 550 front 750 rear
Front -3.2 and 0 toe
Rear -2.5 and 3/32 toe in
I have absolutely zero understeer

After that I ran 1:54:08 at BRP 13CW

Hope that helps

[kaiv]

Originally Posted by ///Mobbin

That's surprising as I thought he had a good rep and I've heard JRZ is very much on top of their customer support (perhaps try and give him a call?).

Also, check out Bryan explaining the JRZ RS Pro's at about 3:10 in this YouTube video:
https://www.youtube.com/watch?v=4SvIcrfKG2I

I had previously decided on a JRZ suspension setup for my last car before I scrapped the plan and sold my car. Curious to hear how it goes for you as I know I'll be shopping suspensions again soon. Good luck and please keep us posted!

Originally Posted by chris82

When I tried to ask him about whether or not I should change my spring rates for my RS Two from the rates I had with my RS1s, he kept saying "if you like them then stay with them" and I did so I didn't change them. but with all due respect, he was incredibly helpful with my JRZ purchase, and he knows his stuff. You're better off calling him, because when I dealt with him his email responses were also very short, but talking with him he provides whatever you need to know.



Exactly, I don't have an M3 lol

Alright, I'll call Bryan (he's no longer replying to my emails anyways ah >.< )

Thanks guys.

Originally Posted by italyix

OP, if you are looking for recommended spring rates, do yourself a favor and calculate your optimal spring rates using your corner weights. I went though this exercise and figured out that my Nitrons had to be 450 front and 550 rear (I am switching to true rear coil over, hence the low rate). You first need to figure out what spring frequency you need to be at, I chose 2.0 hz/sec for the front and 2.2hz/sec for the rears. From there use the calculations (Eibach has a nice technical breakdown on how to do this) to determine your spring rates. I posted how to do this somewhere on the forum as well.

Hope this helps you!

I'm good with spring rates for now. Thanks!

Originally Posted by Exclusivs

Kaiv reach out to Platteforme AG / & Fall-line to get some perspectives. Both seem well versed in JRZ applications on the E9X platform and may be able to guide you in the right direction on your setup. Keep us posted!

Will do!

Originally Posted by okusa

I've been on RS Pro for 18 months or so. They have always performed well but the smartest thing I did was to get a proper height adjustment and alignment over at West End in Gardena. That totally transformed my car. My specs are:

3,746 lbs with me and 1/3 tank
Springs are 550 front 750 rear
Front -3.2 and 0 toe
Rear -2.5 and 3/32 toe in
I have absolutely zero understeer

After that I ran 1:54:08 at BRP 13CW

Hope that helps

Helps very much! Thanks! I guess a fast local tracker with the same suspension is exactly what I was looking for. Judging by that lap time I have no doubt your car is setup extremely well, not to mention you must be a hell of a driver!! When are you going back out there?

YGPM!

[okusa]

Originally Posted by kaiv

Helps very much! Thanks! I guess a fast local tracker with the same suspension is exactly what I was looking for. Judging by that lap time I have no doubt your car is setup extremely well, not to mention you must be a hell of a driver!! When are you going back out there?

YGPM!

Glad to help. 11/20 with Speed District.