All Things Mk5 > Performance Modifications

TT lower arms and geometry changes

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Carrera2RS:
You make a good point regarding brake clearance.

I am currently running ET45 8 x 18 TD's al round. As I have not had any arch problem over the last week, I have put my order on hold for two ET50's

I am awaiting VWR to restock their 352/32 six pot kit. I would prefer AP Racing or Bembo but the VWR size equivalent is cheaper. I will continue to experiment with tyre pressures and ride heights. At the moment the balance when settled mid corner is extremely good and close to Neutral.

The feel straight ahead is better, the initial turn in still needs more weight and precision for me. I am wondering if another 15-20 mins at the front might help ? I am also wondering if I reduce the rear toe in to say 10 mins. Plus I may try putting the front roll bar on full hard to improve feel then perhaps I can achieve better turn in and feel and keep the mid corner balance ?

Fuscobal what ride heights do you run and suspension set up ?

the bruce:
Setting the front ARB to hard will help initial turn in and may increase traction issues at corner exit.  :wink:

Don't go too low on rear because you need travel. With only 325 mm I'd strongly recommend a
stiff rear to prevent hitting the bump stops. This would cause oversteer.

fuscobal:
Don't know the current height (especially ince I lost some weight) but I'm using the PSS10 at 7F/7R on the track and 2F/2R on the street. Sways are on stiff both but at the last Hungaroring session they were on soft both + 5F/5R for the suspension. Height is however close to equal F/R (about 64cm from the ground to the wheel arch) !

Carrera2RS:
I have jus measured my floor to arch looks like 640ish front and 630ish rear. I suspect the 'lost' 5mm between wheel centre measurements and floor measurements is down to the position of the wheel centre and arch.

I have settled on 33 psi front 32.5 rear cold (well warm weather, but no direct sun on tyre) after a drive they come in 34.5-35 F and 34-34.5 R

I am very happy with this set up. I tried experimenting with damper settings and I have settled again on 3F, 4R. I was going to drop the rear pressures a little, but the balance is now very good indeed, it's extremely balanced around roundabout, so I thought leave it alone !

The car is currently the best I have had it. :happy2:

fuscobal:
Well, Carrera, it seems we are both running on the same height and pressures. I measured the height to be 635-645mm (not the same everytime because I need a straight plane wich I don't have here...maybe when I go to my mechanic). The pressures I'm using on the track are also between 32 and 34PSI. Tried softer but my car is too heavy and they got overheated. As for the suspension, have you tried harder on the track ? I used 5/10 both F and R but I would try like 7/10 F and 8/10 R next time !

My car had the following weight evolution :

- 1715Kg in Aug 2010 when I was on street tires + OEM arms and I had my lady with me ! > pulled a terrible 2'29''
- 1636.5Kg in Oct 2010 when I was on R compound tires + TT arms and did not have the lady and the rear seats anymore ! > pulled a good 2'18''

On the future events this year I should have something like this > 1636.5 - 80 = 1556.5 Kg. For next year, I'm planning to get to about 1450Kg with me inside !

What's your weight Carrera ?

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