no no no ! not stock ! eibach coilovers, aka KW v.1

and to politely answer the "why you moded " question, I almost killed myself during the break-in ( 4000 rpm limit ).

stock z , especially HR, is not the best handling car out there. right now with my novice skills i can almost keep-up with a cayman s

and i am working very hard to get better.

 

OP,

no offense, but plenty of us have tracked the Z bone stock with no issues besides the typical weak parts on the Z like the stock brake pads.

The HR has the same suspension setup as the 06 as far as I know, so if you almost killed yourself during the break-in period, there are other things you should be concerned with besides suspension setup. I don't mean this in a bad way, and this is coming from someone who has a lot to learn as well.

Are you experiencing these issues on the track or during agressive street driving? If on the street, you might want to invest in an HPDE day to learn your car better. It really clears things up a lot when you're taking the same turns over and over and figuring out what the car is really doing.

HTH

 

Good question.

The sway bar acts to inhibit body roll by attaching the body to the wheels. The stiffer the bar, the less body roll. The softer the bar, the more body roll.

Another way to understand this is to think of it in extremes.

Imagine taking the bar off, which in effect, would be the softest setting possible. Alternatively, imagine putting in a solid bar that does not flex, which would be the stiffest setting.

In each senario above, what would happen to the wheel on your side if you lifted one side of the car. Would the wheel come off the ground with no sway bar, or would the wheel come off the ground if you had a solid bar? And again, the bar is connecting the body to the wheels.

So, when the car is cornering, a stiffer saybar keeps more weight on the inside wheel, by preventing the body to roll over to the outside.

-Rich

 

The way I see it, the wheel would come off the ground with a solid bar. No bar would allow the wheel to travel when lifitng which is the equivalent to body roll.
So if no body roll(sway bar induced) when you corner, most of the weight would go to the outside wheel.
Isn't this what happens when you have too much sway(stiff) up front? It makes the front end push because too much weight goes to the outside front tire.

 

HPDE will be done this summer.

stock tires on a z are a joke and with 30-40 more hp from HR ( base ) it goes sideways with very little throttle... crap i just convinced myself that i need an LSD ...

 

you are right, the sway bar need to be softer to keep the inside wheel from lifting of the ground.


also, if the front bar would get stiffer, would it push the car lower? so then could i make the front bar stiffer and leave the rear one in the middle?

 

I can already tell this is a losing battle... but quit modding and learn to drive the car What event are you doing for your HPDE? What track?

Why do you have coil overs? Just to fit those huge *** wheels? (Don't get me wrong, they look kick-***) Have you corner balanced the car? Any idea what your rear toe settings are? Any of these things can cause weird suspension geometry and handling.

Outside of all that... do you know the differences between turn geometries? (Increasing radius, Decreasing radius... and how to manage either?) Are you pinching off the turn's exit? Of course you are if you're doing this on the street. How do you know you're pulling 1g? Is that a peak reading your G-meter is giving you? OR is that that a constant 1g that you can see based on data acquisition?

I'm asking all these questions to open your eyes a little... stop wasting money on mods and start spending it wisely on learning the car and how it handles in a structured and safe environment like the track. Ask for an instructor with 350Z experience, if none is available, as for someone with RWD, high-HP experience... doesn't really matter... just get someone in the passenger seat with you and listen to them.

Take your car as it is now somewhere that can align and corner weight it as neutral as possible and go out on track with an open mind.

 

^ 100 % aggred. once again working to get in with the local bmw club to do hdpe @ road atlanta. right here http://www.peachtreebmwcca.org/ptDE_default.asp

and Stacy, thank you for posting , i am a total noob , but i am serious about learning how to drive. and now i at least know who to ask in NC.

 

Good one... but an even better one would be the Triangle Z Club / Tarheel Sports Car Club at VIR next month: May 28-29

www.tzcthscc.motorsportreg.com

I've got some DAMN fine 350Z instructors for ya!!

 

^ we'll talk. i need help...

 

Hi guys thank you very much for the advice, i will get with Stacy and the local guys in ATL and hopefully learn to drive.

I am going to lock this , just to keep this clean.

Once again thank you.