Orthojoe's track build journal
10-13-2015, 02:19 AM
#1381
Nordschleife Master
Thread Starter
Originally Posted by Macca
Great update Joe. Just for sake of clarity given the length of the thread could you re iterate your current geo settings you are happy with?
Front:
-2.7 camber (maxed out, not enough threads to add anymore shims)
9.5 degrees caster
3mm total toe out front (1.5mm each side)
Sway bar full stiff
Rear:
-2.4 camber
6mm total toe in (3mm each side)
Sway bar full soft
10-13-2015, 04:28 AM
#1383
Rennlist Member
Your numbers seem opposite of where it seems the RS wants to go.
Now my car understeers and outside tires wear.
F
Zero toe
-3 camber
Caster unknown
R
2mm in each side
-2.5 camber
Bars both middle I'd say if I change I go stuffer in the rear...
Stay tuned thanks for all the sharing.
10-13-2015, 06:07 AM
#1384
Intermediate
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hello,
tracked my Rs this week-end.
2.85 front and 2.15 rear camber, castor 9.5
temperature of the tires were perfect front and rear
i found that 29 and 31 were correct pressures
no rubbing into the fenders
adjust front sway to full soft and rear to full stiff.i have understeer with original settings
it was cold... first session 1c last session 14c
denis
tracked my Rs this week-end.
2.85 front and 2.15 rear camber, castor 9.5
temperature of the tires were perfect front and rear
i found that 29 and 31 were correct pressures
no rubbing into the fenders
adjust front sway to full soft and rear to full stiff.i have understeer with original settings
it was cold... first session 1c last session 14c
denis
10-13-2015, 06:12 AM
#1385
Rennlist Member
Thank you Denis!
I have no more rubbing after raising the complete car one turn per shock +1.5mm?
Also because I'm not driving on the Ring / big compression.
I also angled the rear wing a bit, lowering the front of the wing.
I think I am OK with what I have but will reconfirm on the 22nd after going to the Porsche dealer then in the 23rd I may ask them at Hickenheim to stiffen the rear bar, followed by softening the front bar.
What track did you drive?
I have no more rubbing after raising the complete car one turn per shock +1.5mm?
Also because I'm not driving on the Ring / big compression.
I also angled the rear wing a bit, lowering the front of the wing.
I think I am OK with what I have but will reconfirm on the 22nd after going to the Porsche dealer then in the 23rd I may ask them at Hickenheim to stiffen the rear bar, followed by softening the front bar.
What track did you drive?
10-13-2015, 11:22 AM
#1387
Nordschleife Master
Thread Starter
Originally Posted by TRAKCAR
Joe, I'm going to a German dealer next week to ask about stock alignment was for RS and what they are doing for the guys that track and race them. Peterfirst is also contacting a few RS owners who are tracking them.
Your numbers seem opposite of where it seems the RS wants to go.
Now my car understeers and outside tires wear.
F
Zero toe
-3 camber
Caster unknown
R
2mm in each side
-2.5 camber
Bars both middle I'd say if I change I go stuffer in the rear...
Stay tuned thanks for all the sharing.
Your numbers seem opposite of where it seems the RS wants to go.
Now my car understeers and outside tires wear.
F
Zero toe
-3 camber
Caster unknown
R
2mm in each side
-2.5 camber
Bars both middle I'd say if I change I go stuffer in the rear...
Stay tuned thanks for all the sharing.
It could be that I'm slower at Laguna and Sonoma, but I think it is the many high speed turns and sweepers at thill that kill the tires.
If it wasn't for needing to replace my front set of tires due to the rupture, I'm guessing the front and rear would have worn evenly this time around too....
10-13-2015, 11:45 AM
#1388
Burning Brakes
So when ur at LS Joe are you lifting thru the sound check turns &/or short shifting or is the GPS activated exhaust valves plus the turnaway pipes doing enough to keep you within sound limits??
10-13-2015, 12:04 PM
#1389
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No doubt about that. Pavement surface grip, camber, etc., and how they affect balance of the car make a big difference, in my experience. To some extent, we can change our inputs to adapt to tracks/turns to extract grip and performance from the car without prematurely killing tires. Lately, I'm also leaning towards initially running a bit higher pressure to avoid prematurely killing the edges of the tires, then gradually backing down the hot pressure based on the tire wear. But in general, I think we can expect that the tires won't last too long if we intend to drive the car hard.
10-13-2015, 12:26 PM
#1390
I didn't realize you changed the rear bar setting too... I have same setup but front at stiff and rear at middle, and I still feel a bit of under steer in general.
10-13-2015, 12:32 PM
#1391
Nordschleife Master
Thread Starter
I follow Randy Pobst's preference for slight understeer as the faster setup for me. If that is what you prefer as well, then leave it be. Softening the rear bar more will only add more understeer.
10-14-2015, 12:30 AM
#1393
Nordschleife Master
Thread Starter
On MPSC2, I shoot for 32F/33-34R. I'll try out 35F/36R with the dunlops and report back next month.
10-14-2015, 01:08 AM
#1394
It is my understanding that the dunlops want 2-3psi more than the MPSC2. It makes sense to me given how the outer tread block on the dunlops are not as big and bulky as the MPSC2. I haven't run the dunlops yet myself, though. I plan to run my dunlops next month.
On MPSC2, I shoot for 32F/33-34R. I'll try out 35F/36R with the dunlops and report back next month.
On MPSC2, I shoot for 32F/33-34R. I'll try out 35F/36R with the dunlops and report back next month.
10-14-2015, 01:10 AM
#1395
GT3 player par excellence
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