Need Help with Fairlady Z 300ZX V.R TT 2BY2

[elling73]

My Fairlady Z 300ZX ver R TT 2BY2 (Z32) 98 always understears in mid and corner exit.
Help needed please.

Setting are as follows:
572BHP 550PP Sport soft tiers.
weight 1285 54/46
Suspension:
RH -15 -15
Spring Rate 8,8 8,6
ext 5 5
comp 4 4
Arb 5 4
Camber Angle 2,2 2,0
Toe -0,02 0,06
LSD 8 14 10
Brake Balance 8 7

All tuning parts added except rigidity Improvement.

 

[9KRPM]

Increase rear camber by 1-3, reduce rear spring rate by 1-3 and that should get you started at least. Someone better than me can probably give you exact numbers.

Your rear is little stiff for dampening compression that low, what happens is that as you accelerate out of a corner, weight goes suddenly to the rear and that reduces your ability to steer.

 

[praiano63]

My Fairlady Z 300ZX ver R TT 2BY2 (Z32) 98 always understears in mid and corner exit.
Help needed please.

Setting are as follows:
572BHP 550PP Sport soft tiers.
weight 1285 54/46
Suspension:
RH -15 -15 -5/-5
Spring Rate 8,8 8,6 10,5/8,5
ext 5 5 6/6
comp 4 4 4/5
Arb 5 4 3/4
Camber Angle 2,2 2,0 2,4/2
Toe -0,02 0,06
LSD 8 14 10
Brake Balance 8 7

All tuning parts added except rigidity Improvement.

try this.

 

[elling73]

Thank you for your answers.
Would maybe lowering LSD from 8 14 10 to 7 10 10 also help on understeer during corner exit?

 

[praiano63]

Thank you for your answers.
Would maybe lowering LSD from 8 14 10 to 7 10 10 also help on understeer during corner exit?

Not at all, you would have to low your LSD accel just in case of over steer out corner.
Check the collor of your rear tires during corner exit. Must be same collor.
If inside tire is hotter then raise lsd accel till you feel comfortable or till you can manage the induced oversteer with throttle control ,without any problem.
This can be usefull sometime. Better to have this option than an understeer that you can only control slowing down your car.

 

[elling73]

The suspension setup from Praiano helped me I think but lap time has not improved.
I do my testing on Tsukuba and laptime is 0.58.897.
Another problem is corner turn in when I let go of the breakes the car looses traction on front wheels as braking no longer pushes the front wheels to the ground. I can actually keep higher speed in the last high speed corner while breaking than if corner entry was in lover speed with no breaking.

 

[Daisey327]

When i have what appears to be your problem ill try and add a couple of dead bodies (weight) in the trunk (rear) and also I play with negative rear camber... although, i have been told most people don't drive my style so.... give it a play, you may like it.

 

[elling73]

elling73
My Fairlady Z 300ZX ver R TT 2BY2 (Z32) 98 always understears in mid and corner exit.
Help needed please.

Setting are as follows:
572BHP 550PP Sport soft tiers.
weight 1285 54/46
Suspension:
RH -15 -15 -5/-5
Spring Rate 8,8 8,6 10,5/8,5
ext 5 5 6/6
comp 4 4 4/5
Arb 5 4 3/4
Camber Angle 2,2 2,0 2,4/2
Toe -0,02 0,06
LSD 8 14 10
Brake Balance 8 7

All tuning parts added except rigidity Improvement.
try this.

Settings changed as sugested by praiano which helped on handling but front wheels does not have the amount of grip as I think they should have.

I have also played with rear ballast to give a more even ballance (51/49) but that did not help me.