Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...
Sponsored by:
Sponsored by:

Recent picture of my car at a lapping day, is this rear roll normal?

Thread Tools
 
Search this Thread
 
Old 08-14-2013 | 10:34 AM
  #1  
Hungry-R's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2012
Posts: 65
Total Cats: -2
Default Recent picture of my car at a lapping day, is this rear roll normal?

https://fbcdn-sphotos-a-a.akamaihd.n...15384301_n.jpg



I just saw this picture from recent track day, and the rear driver side tire is being tucked really bad giving more camber than front. Is this normal?

I am running xida 700/400, front rb thick tubular on soft, super miata race alignment, and 4.25 ride height front and rear.


Also, when you start setting your dampers, do you guys start at softest settings and start limiting traction by making them harder or do you start middle of the adjustable range? (right now, i start at 3/4 hardness and then if I feel that my car is pushing, i soften front and vice versa, is this how you guys adjust your dampers as well?)

Last edited by Braineack; 08-14-2013 at 01:12 PM.
Old 08-14-2013 | 11:11 AM
  #2  
Leafy's Avatar
Elite Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 9,484
Total Cats: 104
From: NH
Default

That looks weird. Something doesnt seem right. I'll try to find a picture of my car from the same angle later.
Old 08-14-2013 | 11:17 AM
  #3  
Hungry-R's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2012
Posts: 65
Total Cats: -2
Default

this is a mid exit of a right hand corner before straight around 50mph../
Old 08-14-2013 | 12:27 PM
  #4  
y8s's Avatar
y8s
DEI liberal femininity
iTrader: (8)
 
Joined: Jun 2005
Posts: 19,338
Total Cats: 574
From: Fake Virginia
Default

If you're at max cornering under acceleration, you're going to compress the outside rear wheel.

What suspension mods do you have? And keep in mind that if you prevent that movement, you may be losing grip and going slower.
Old 08-14-2013 | 12:40 PM
  #5  
Leafy's Avatar
Elite Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 9,484
Total Cats: 104
From: NH
Default

To compare, here's the closest picture of my car that I have, xidas 650/400 rb race bar on soft, no rear bar, 4.25/4.5, something like the 949 alignment, 85k miles rubber stock bushings. About a 40-50mph turn, sharper than yours and I'm almost to the middle of the turn.



I think it might just be that 1/4" ride height difference. I've never been that low in the rear and I've never had that much negative camber in a turn.
Attached Thumbnails Recent picture of my car at a lapping day, is this rear roll normal?-7818104682_8cc19012a6_o.jpg  
Old 08-14-2013 | 01:11 PM
  #6  
rleete's Avatar
Elite Member
iTrader: (21)
 
Joined: Jun 2007
Posts: 6,638
Total Cats: 1,284
From: Rochester, NY
Default

Yeah, but it looks like your DS rear is lifting, while his outside tire is still (mostly) planted. I'd say that was the result of bar vs. no bar in rear.
Old 08-14-2013 | 02:28 PM
  #7  
y8s's Avatar
y8s
DEI liberal femininity
iTrader: (8)
 
Joined: Jun 2005
Posts: 19,338
Total Cats: 574
From: Fake Virginia
Default

banked turn?
Old 08-14-2013 | 02:31 PM
  #8  
SmokeSR's Avatar
Junior Member
iTrader: (1)
 
Joined: Aug 2009
Posts: 48
Total Cats: 0
Default

That corner is also pretty bumpy. Any chance of a video or a few other pics at that corner?
Old 08-14-2013 | 02:42 PM
  #9  
Hungry-R's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2012
Posts: 65
Total Cats: -2
Default

here are the shots from the corner







Also , can you guys share how you dial in your dampening adjustments?
The turn is not banked and I have the rusty stock rear sway bar in place
Attached Thumbnails Recent picture of my car at a lapping day, is this rear roll normal?-klde.jpg   Recent picture of my car at a lapping day, is this rear roll normal?-xz44.jpg   Recent picture of my car at a lapping day, is this rear roll normal?-xln1.jpg   Recent picture of my car at a lapping day, is this rear roll normal?-6zut.jpg   Recent picture of my car at a lapping day, is this rear roll normal?-v6bo.jpg  

Old 08-14-2013 | 02:49 PM
  #10  
Hungry-R's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2012
Posts: 65
Total Cats: -2
Default

for ***** and giggles, here is a picture of my car at the same corner (entry portion of the double apex corner) Before rb sway bar and on stock suspension

Attached Thumbnails Recent picture of my car at a lapping day, is this rear roll normal?-cscs-2013-round-1-season-opener-gp_amf-155.jpg  
Old 08-14-2013 | 03:19 PM
  #11  
TurboRoach's Avatar
Junior Member
iTrader: (3)
 
Joined: Aug 2005
Posts: 488
Total Cats: 3
From: Gig Harbor, WA
Default

Was the ride height set with you in the car? If not, it looks normal considering there are two of you in the car.
Old 08-14-2013 | 03:42 PM
  #12  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 79,818
Total Cats: 4,152
From: Chantilly, VA
Default

where's can i buy the flesh colored helmet?
Old 08-14-2013 | 03:48 PM
  #13  
Leafy's Avatar
Elite Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 9,484
Total Cats: 104
From: NH
Default

Originally Posted by Braineack
where's can i buy the flesh colored helmet?
Shhh, I really want to take a 3d -> 2d picture of my head and have it printed as a vinyl wrap for my helmet.
Old 08-14-2013 | 03:50 PM
  #14  
Hungry-R's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2012
Posts: 65
Total Cats: -2
Default

first time for my buddy to come to track, the organizer's policy say helmets for all heads or no helmets. Unfortunately we had to choose the latter.
Old 08-14-2013 | 03:56 PM
  #15  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 79,818
Total Cats: 4,152
From: Chantilly, VA
Default

shouldnt the policy be: helmets for all or no driving?
Old 08-14-2013 | 04:11 PM
  #16  
shlammed's Avatar
Elite Member
iTrader: (8)
 
Joined: Dec 2008
Posts: 2,910
Total Cats: 51
From: Kingston, Ontario
Default

go to the gym.

corner with you in it will squat less going around a corner.
Old 08-14-2013 | 04:37 PM
  #17  
hustler's Avatar
Tour de Franzia
iTrader: (6)
 
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Default

Looks fine.
Old 08-14-2013 | 05:34 PM
  #18  
MicaCeli's Avatar
Junior Member
iTrader: (1)
 
Joined: Aug 2006
Posts: 456
Total Cats: 6
From: Ellicott City, MD
Default

Originally Posted by shlammed
go to the gym.

corner with you in it will squat less going around a corner.
What are the weights of the driver and pass?
Old 08-15-2013 | 01:03 AM
  #19  
endura's Avatar
Junior Member
 
Joined: Apr 2013
Posts: 142
Total Cats: 7
From: toronto
Default

This is tmp/cayuga. Picture is normal as there are actually 2 massive dips on that corner. Lap times?
Old 08-15-2013 | 08:37 AM
  #20  
Doppelgänger's Avatar
Elite Member
iTrader: (12)
 
Joined: Sep 2007
Posts: 6,850
Total Cats: 71
From: Charlotte, NC
Default

It's hard to compare Leafy's picture to yours as he is not under hard acceleration exiting the turn like you are. Depending on your whp number, the track, your tires and your swaybar...it's completely comprehensible to see your car behaving like that.

Also, what is the static ride height of your car?


About the only pic I could find of me under acceleration on exit is at an auto-X (appx 40-45mph)- I'm definitely more level, but I am also running Goodwin Special Ohlins DFVs, Whiteline rear sway and Kumho V710 tires.

Attached Thumbnails Recent picture of my car at a lapping day, is this rear roll normal?-img_6731.jpg  



All times are GMT -4. The time now is 04:16 AM.