BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Track / Autocross / Dragstrip / Driving Techniques
 
BPM
Post Reply
 
Thread Tools Search this Thread
      04-01-2020, 02:59 PM   #11727
dparm
World's greatest HPDE driver
dparm's Avatar
United_States
2323
Rep
7,375
Posts

Drives: C7 Corvette Grand Sport
Join Date: Jun 2013
Location: Dallas, TX

iTrader: (1)

Question about R888R lifespan: I'm at the wear bars and am wondering if these can be run down to the cords. From what I've read on various forums, the answer is yes.
__________________
Now: 2017 Corvette Grand Sport
Past: 2011.5 M3 sedan ZCP
Appreciate 0
      04-01-2020, 06:48 PM   #11728
rhyary
Captain
United_States
248
Rep
980
Posts

Drives: 2013 M3
Join Date: May 2015
Location: Albany, NY

iTrader: (0)

Quote:
Originally Posted by dparm View Post
Question about R888R lifespan: I'm at the wear bars and am wondering if these can be run down to the cords. From what I've read on various forums, the answer is yes.
I ran all my tires to the cords, including the R888R.
Appreciate 0
      04-01-2020, 06:54 PM   #11729
Shmelgy
B.E.
Shmelgy's Avatar
United_States
318
Rep
677
Posts

Drives: F80 M3 & 1969 Mustang Fastback
Join Date: May 2010
Location: City of Angels

iTrader: (3)

roastbeef slicer

I picked up my car from Racewerkz yesterday and have some weights for you guys.

Stock radiator fan- 10.62lbs
Spal fan- between 2 and 3 lbs
For those wondering, the Spal fan is part # 30100400

The complete electric power steering pump conversion only saves 4lbs because the electric pump is actually heavier. The electric pump used is from a Mercedes A class (W168) which was impossible to find new. I settled on a refurbished one I found on eBay.

The total savings ended up being 30lbs off the nose because the A/C compressor was finally able to be removed since it shares a pulley with the stock power steering.

I'm going to willow springs on Friday, but from the quick drive around the block, the steering feels heavier. Added bonus-the fan and pump are routed to some new switches on the dash! #race

Pics- new pump with custom bracket, old fan plus weight, new fan's box
Attached Images
   
__________________
Current: 2016 M3 Individual Grigio Telesto Pearl, Sakhir Orange/Black Full Leather w/ CF trim, 6MT, ZCP, CCB, Executive, Lighting, Alex@Alpine coded, 20/15mm BMS spacers, MRG titanium studs, KW Clubsport, Vorsteiner GTS Diffuser, MSR Intake, BBS FI-R, MPE, etc...
Previous: 2011 E92 M3 Melbourne Red on Black 6MT ZCP. --> now 2010 dedicated track car
Appreciate 5
roastbeef6761.50
slicer1612.00
///Mobbin766.00
kayha1252.00
M3MPH1S532.00

      04-01-2020, 07:38 PM   #11730
slicer
Major General
slicer's Avatar
United_States
1612
Rep
6,146
Posts

Drives: '13 E92 M3 - '17 F31 330i
Join Date: Jan 2009
Location: Santa Barbara, CA - Instagram - @slicer_m

iTrader: (37)

Very cool - thanks for sharing
__________________
'13 AW E92 M3 - Ohlins TTX, SPL Susp Arms, AP Racing BBK (Essex), Akrapovic GT4, CSF Cooling, VPhreaks Bat, OE M3 GTS - Lip/RSD/Cage, M235ir Wing, Varis Diffuser, Karbonius Airbox, MFactory DS, M24 Door Cards, KMP Wheel, Sparco Seats w/BK Mounts, BBS E88
INSTAGRAM - @Slicer_M
Appreciate 0
      04-01-2020, 07:46 PM   #11731
tsk94
First Lieutenant
tsk94's Avatar
Canada
164
Rep
332
Posts

Drives: E92 M3
Join Date: May 2017
Location: Calgary

iTrader: (1)

Quote:
Originally Posted by Shmelgy View Post
roastbeef slicer

I picked up my car from Racewerkz yesterday and have some weights for you guys.

Stock radiator fan- 10.62lbs
Spal fan- between 2 and 3 lbs
For those wondering, the Spal fan is part # 30100400

The complete electric power steering pump conversion only saves 4lbs because the electric pump is actually heavier. The electric pump used is from a Mercedes A class (W168) which was impossible to find new. I settled on a refurbished one I found on eBay.

The total savings ended up being 30lbs off the nose because the A/C compressor was finally able to be removed since it shares a pulley with the stock power steering.

I'm going to willow springs on Friday, but from the quick drive around the block, the steering feels heavier. Added bonus-the fan and pump are routed to some new switches on the dash! #race

Pics- new pump with custom bracket, old fan plus weight, new fan's box
Good info - thanks for sharing the weights.
I will note though, you can remove the AC compressor while using the stock power steering pump, you just need to get a shorter belt.
Appreciate 0
      04-01-2020, 07:51 PM   #11732
Shmelgy
B.E.
Shmelgy's Avatar
United_States
318
Rep
677
Posts

Drives: F80 M3 & 1969 Mustang Fastback
Join Date: May 2010
Location: City of Angels

iTrader: (3)

Quote:
Originally Posted by tsk94 View Post
Quote:
Originally Posted by Shmelgy View Post
roastbeef slicer

I picked up my car from Racewerkz yesterday and have some weights for you guys.

Stock radiator fan- 10.62lbs
Spal fan- between 2 and 3 lbs
For those wondering, the Spal fan is part # 30100400

The complete electric power steering pump conversion only saves 4lbs because the electric pump is actually heavier. The electric pump used is from a Mercedes A class (W168) which was impossible to find new. I settled on a refurbished one I found on eBay.

The total savings ended up being 30lbs off the nose because the A/C compressor was finally able to be removed since it shares a pulley with the stock power steering.

I'm going to willow springs on Friday, but from the quick drive around the block, the steering feels heavier. Added bonus-the fan and pump are routed to some new switches on the dash! #race

Pics- new pump with custom bracket, old fan plus weight, new fan's box
Good info - thanks for sharing the weights.
I will note though, you can remove the AC compressor while using the stock power steering pump, you just need to get a shorter belt.
True, we just decided to wait rather than play around with a shorter belt. Excited to see if I can actually feel a difference now
__________________
Current: 2016 M3 Individual Grigio Telesto Pearl, Sakhir Orange/Black Full Leather w/ CF trim, 6MT, ZCP, CCB, Executive, Lighting, Alex@Alpine coded, 20/15mm BMS spacers, MRG titanium studs, KW Clubsport, Vorsteiner GTS Diffuser, MSR Intake, BBS FI-R, MPE, etc...
Previous: 2011 E92 M3 Melbourne Red on Black 6MT ZCP. --> now 2010 dedicated track car
Appreciate 0
      04-01-2020, 08:28 PM   #11733
dparm
World's greatest HPDE driver
dparm's Avatar
United_States
2323
Rep
7,375
Posts

Drives: C7 Corvette Grand Sport
Join Date: Jun 2013
Location: Dallas, TX

iTrader: (1)

Quote:
Originally Posted by rhyary View Post
I ran all my tires to the cords, including the R888R.
To be more precise, I'm trying to figure out how far past the wear bars those cords are located.
__________________
Now: 2017 Corvette Grand Sport
Past: 2011.5 M3 sedan ZCP
Appreciate 0
      04-01-2020, 09:25 PM   #11734
tsk94
First Lieutenant
tsk94's Avatar
Canada
164
Rep
332
Posts

Drives: E92 M3
Join Date: May 2017
Location: Calgary

iTrader: (1)

Quote:
Originally Posted by Shmelgy View Post
True, we just decided to wait rather than play around with a shorter belt. Excited to see if I can actually feel a difference now
I'd be curious to know the HP gain you'd get from the electric pump. I was considering it for my car as well, that setup definitely has it's perks. Also would like to hear if you notice a difference in steering feel and feedback.
Appreciate 0
      04-01-2020, 10:25 PM   #11735
roastbeef
Lieutenant General
roastbeef's Avatar
United_States
6762
Rep
10,400
Posts

Drives: E92 M3
Join Date: Nov 2010
Location: Orange County, CA

iTrader: (2)

Quote:
Originally Posted by kayha12 View Post
Quote:
Originally Posted by roastbeef View Post
Took off the rear bumper today to get at the crash bar and tow base nuts. I need a deep socket 18 to get the nuts. The tow hooks base bolts are three 13mm and one 17mm. The 17mm big boi just spins and doesn't come loose. I need to take off the crash bar to see what's going on back there. Not sure how soon I can get a deep 18mm with this travel ban going on in California.
Hey Roastbeef, with the rear bumper off, can you take a direct shot of the rear? Wondering if there's anything intruding directly behind the wheel well - thinking about shaving that area off the bumper
Here is a few shots with the bumper off and the bumper holder removed. You could easily trim the holder, it's pretty stout. There is what appears to be a charcoal canister a little more inboard, but there is plenty of room for aero improvements.
Attached Images
   
__________________
Instagram; @roastbeefmike
Appreciate 1
kayha1252.00

      04-02-2020, 09:48 AM   #11736
//steve\\
First Lieutenant
//steve\\'s Avatar
United_States
276
Rep
356
Posts

Drives: 2012 E92 M3
Join Date: May 2012
Location: Atlanta, GA

iTrader: (1)

What are most guys finding to be the ideal spring rates for a mixed use car?

My car is a mostly street car (100% right now but would like to do some HPDE in the near future), running Michelin cup2s and would likely stay on this kind of tire for the foreseeable future. It is a weekend toy only though so I don't need something daily comfort compliant either. I've always catered towards what the track guys find ideal and then back off just a hair.

Without any real world experience my reading/gut feeling say go 500/550 front, 800 rear.

Car currently has Bilstein B16 damptronic which are based around 514/799 rates but it's a progressive spring so I know they ride/behave like they are just a little softer than that. All the comfort I could ask for on normal but even on sport+ (or whatever you call it) they just aren't quite as firm as I'd like. Maybe that's just how this car feels, maybe I want more rate. Not sure if anyone has ever attempted to convert those over to linear springs either and see how they do.

I know what each person finds acceptable in terms of NVH is different, I'm probably on the more extreme end of what I find tolerable. I'll also add the car has basically the entire SPL arm catalog, Solid diff and subframe mounts, Vibratechnic engine mounts, and Group-n trans mounts. It's not really any worse in the NVH department than the S2000s I've been driving for the last 10+ years. In fact given how solid everything is I'm surprised it's not far worse in the NVH department. That same list of mods on a S2000 and I'd probably hate the car.

Last edited by //steve\\; 04-02-2020 at 09:54 AM..
Appreciate 0
      04-02-2020, 10:54 AM   #11737
Kelse92
Member
United_States
262
Rep
515
Posts

Drives: 2013 e92 M3
Join Date: Aug 2018
Location: Dallas, TX

iTrader: (0)

Quote:
Originally Posted by //steve\\ View Post
What are most guys finding to be the ideal spring rates for a mixed use car?

Without any real world experience my reading/gut feeling say go 500/550 front, 800 rear.
I have KW Clubsports with 600/800 rates. The car is still my daily driver and is pretty comfortable. I just turn the shocks down to full-soft for the street and then make adjustments at the track. I usually write in a notebook what setups I like at what track/conditions so I'm not guessing every time and then play with it during the day if I need.
__________________

#ladydriven Heavy-spec M3 // KW Clubsports // AA x-pipe // Gintani muffler // Macht-Schnell intake // Gintani tune // Too Many Apex Wheels // Stoptech ST-60 // Cobalt Friction brake pads //
Appreciate 0
      04-02-2020, 02:13 PM   #11738
StripclubDJ
Captain
StripclubDJ's Avatar
United_States
1395
Rep
923
Posts

Drives: e92 m3
Join Date: May 2016
Location: cali

iTrader: (2)

Quote:
Originally Posted by Kelse92 View Post
Quote:
Originally Posted by //steve\\ View Post
What are most guys finding to be the ideal spring rates for a mixed use car?

Without any real world experience my reading/gut feeling say go 500/550 front, 800 rear.
I have KW Clubsports with 600/800 rates. The car is still my daily driver and is pretty comfortable. I just turn the shocks down to full-soft for the street and then make adjustments at the track. I usually write in a notebook what setups I like at what track/conditions so I'm not guessing every time and then play with it during the day if I need.
Full soft?

Umm what
Appreciate 0
      04-02-2020, 02:38 PM   #11739
tsk94
First Lieutenant
tsk94's Avatar
Canada
164
Rep
332
Posts

Drives: E92 M3
Join Date: May 2017
Location: Calgary

iTrader: (1)

Quote:
Originally Posted by StripclubDJ View Post
Full soft?

Umm what
Sounds reasonable to me? That's what I did with Clubsports on my E46 for the street, maybe wasn't full soft but close to it.
Appreciate 0
      04-02-2020, 03:16 PM   #11740
Kelse92
Member
United_States
262
Rep
515
Posts

Drives: 2013 e92 M3
Join Date: Aug 2018
Location: Dallas, TX

iTrader: (0)

Quote:
Originally Posted by StripclubDJ View Post
Full soft?

Umm what
Well, I wasn't wording it very technically, but as turned down as the compression/rebound will go. It's a hell of a lot "softer" to drive around on the street than if they're clicked all the way up to max...
__________________

#ladydriven Heavy-spec M3 // KW Clubsports // AA x-pipe // Gintani muffler // Macht-Schnell intake // Gintani tune // Too Many Apex Wheels // Stoptech ST-60 // Cobalt Friction brake pads //
Appreciate 0
      04-02-2020, 06:51 PM   #11741
PrimeBMW
Major
PrimeBMW's Avatar
No_Country
282
Rep
1,257
Posts

Drives: E46 M3+S62, E92 M3
Join Date: May 2009
Location: Portland, OR

iTrader: (0)

Quote:
Originally Posted by Shmelgy View Post
roastbeef slicer

I picked up my car from Racewerkz yesterday and have some weights for you guys.

Stock radiator fan- 10.62lbs
Spal fan- between 2 and 3 lbs
For those wondering, the Spal fan is part # 30100400

The complete electric power steering pump conversion only saves 4lbs because the electric pump is actually heavier. The electric pump used is from a Mercedes A class (W168) which was impossible to find new. I settled on a refurbished one I found on eBay.

The total savings ended up being 30lbs off the nose because the A/C compressor was finally able to be removed since it shares a pulley with the stock power steering.

I'm going to willow springs on Friday, but from the quick drive around the block, the steering feels heavier. Added bonus-the fan and pump are routed to some new switches on the dash! #race

Pics- new pump with custom bracket, old fan plus weight, new fan's box
I could have sold you both the A class power steering pump and fan. I upgraded to a 991 cup car power steering pump and never installed the fan (going without a fan).
Appreciate 0
      04-02-2020, 08:55 PM   #11742
Adrian g.
First Lieutenant
Adrian g.'s Avatar
152
Rep
346
Posts

Drives: ///M x 2
Join Date: Nov 2011
Location: Dallas, TX

iTrader: (10)

Quote:
Originally Posted by //steve\\ View Post
What are most guys finding to be the ideal spring rates for a mixed use car?

My car is a mostly street car (100% right now but would like to do some HPDE in the near future), running Michelin cup2s and would likely stay on this kind of tire for the foreseeable future. It is a weekend toy only though so I don't need something daily comfort compliant either. I've always catered towards what the track guys find ideal and then back off just a hair.

Without any real world experience my reading/gut feeling say go 500/550 front, 800 rear.

Car currently has Bilstein B16 damptronic which are based around 514/799 rates but it's a progressive spring so I know they ride/behave like they are just a little softer than that. All the comfort I could ask for on normal but even on sport+ (or whatever you call it) they just aren't quite as firm as I'd like. Maybe that's just how this car feels, maybe I want more rate. Not sure if anyone has ever attempted to convert those over to linear springs either and see how they do.

I know what each person finds acceptable in terms of NVH is different, I'm probably on the more extreme end of what I find tolerable. I'll also add the car has basically the entire SPL arm catalog, Solid diff and subframe mounts, Vibratechnic engine mounts, and Group-n trans mounts. It's not really any worse in the NVH department than the S2000s I've been driving for the last 10+ years. In fact given how solid everything is I'm surprised it's not far worse in the NVH department. That same list of mods on a S2000 and I'd probably hate the car.
As you likely already know shocks make a significant difference in the right quality.

I am running 600/900 springs with MCS 3-way adjustable shocks with remote reservoirs and the car rides nicely when I turn the shock settings back to my street settings.

Last edited by Adrian g.; 04-03-2020 at 08:24 AM..
Appreciate 0
      04-02-2020, 10:29 PM   #11743
kyippee
Major
kyippee's Avatar
United_States
686
Rep
1,238
Posts

Drives: 2011 E92 M3 ZCP
Join Date: Feb 2017
Location: San Francisco, CA

iTrader: (0)

Quote:
Originally Posted by //steve\\ View Post
What are most guys finding to be the ideal spring rates for a mixed use car...
I have 550/800 hyperco springs with GC race camber plates, JRZ RS One shocks. Dinan front control arm monoballs, vibra technic fast road engine mounts.

JRZ recommends 5 clicks for street, 10 for track. I find 18 clicks to be about just right for me on track and fastest. For street comfort, I find myself at 2-3 clicks to be bearable. It's still noticeably harsher over some bumps than full stock, but many people have commented that it is incredibly comfortable considering the suspension setup.
Appreciate 0
      04-03-2020, 07:57 AM   #11744
//steve\\
First Lieutenant
//steve\\'s Avatar
United_States
276
Rep
356
Posts

Drives: 2012 E92 M3
Join Date: May 2012
Location: Atlanta, GA

iTrader: (1)

Thanks for all the feedback. Looks like most are running right around what I would have picked/guessed on anyways.

I'm not looking for it to be 100% perfect on the first try just get to a mostly good enough spot based on some research and I'll adapt down the road.
Appreciate 0
      04-03-2020, 05:00 PM   #11745
hayes180
Captain
hayes180's Avatar
United_States
386
Rep
769
Posts

Drives: E92 2013 M3
Join Date: Apr 2015
Location: MRLS, CA

iTrader: (0)

Garage List
2013 E92 M3  [5.00]
I miss the track....
Appreciate 3
tsk94164.00
beats172.50

      04-04-2020, 02:48 AM   #11746
Bartledoo
Just Some F****** Guy
Bartledoo's Avatar
United_States
944
Rep
1,454
Posts

Drives: 2011 E90 M3 6MT
Join Date: Aug 2015
Location: Seattle, WA

iTrader: (0)

Garage List
2003 VW Eurovan  [0.00]
2011 E90 M3  [0.00]
Got some new parts for track season (i.e. to look at my car wearing them in the garage forever).
Attached Images
 
__________________
E90M 6MT Slicktop Single Humper
Appreciate 2
      04-04-2020, 01:39 PM   #11747
StripclubDJ
Captain
StripclubDJ's Avatar
United_States
1395
Rep
923
Posts

Drives: e92 m3
Join Date: May 2016
Location: cali

iTrader: (2)

Quote:
Originally Posted by Bartledoo View Post
Got some new parts for track season (i.e. to look at my car wearing them in the garage forever).
Noice
Appreciate 0
      04-04-2020, 03:15 PM   #11748
Bartledoo
Just Some F****** Guy
Bartledoo's Avatar
United_States
944
Rep
1,454
Posts

Drives: 2011 E90 M3 6MT
Join Date: Aug 2015
Location: Seattle, WA

iTrader: (0)

Garage List
2003 VW Eurovan  [0.00]
2011 E90 M3  [0.00]
Quote:
Originally Posted by StripclubDJ View Post
Noice
The fact that most of us are still dumping the heat exchanger flow out of our undertray is really bothersome. I wonder what the lift difference is with it blocked off vs open. That would be a cool test.
__________________
E90M 6MT Slicktop Single Humper
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:35 AM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST