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why does the car turn horribly? (350z)

Damping
Roll Bars
acceleration in corners
weight transfer
Or something else

Author Topic: Nissan fairlady Z '03 tune setup  (Read 1276 times)

xboxlordz360

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Nissan fairlady Z '03 tune setup
« on: October 11, 2010, 01:09:38 AM »
Hi,

i am looking for a Nissan fairlady Z '03 car tuning file for any class. If anyone has one i would appreciate it if they could give me there gamertag and upload it to there storefront or Gift it to me.

THANKS

Blooze

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Re: Nissan fairlady Z '03 tune setup
« Reply #1 on: October 11, 2010, 06:23:27 AM »
Around here we prefer to teach folks how to tune their own cars rather than hand out tunings willy-nilly.  What kind of results have you gotten out of trying to tune the car yourself?

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fndrbndr

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Re: Nissan fairlady Z '03 tune setup
« Reply #2 on: October 11, 2010, 11:07:36 AM »
OK, two answers here.

1.  You can get more tunes than you can shake a stick at if you just use the search function in the game.  If you're just looking for a fast tune or a tune for a certain track, that may be your best bet.  We tend to favor real-world techniques here, and sometimes those aren't as quick as some of the things done in tuning houses.

2.  If you're going to get any meaningful help here, we're going to need WAY more information.  What do you want the car to do?  Are you looking for power, grip, or some combination of both?  Do you have any test tracks in mind?  Driving the car in stock form, what does it do well?  What does it do poorly?  Why do you want to work with this particular car?  Is it because there's a race car you like?  Do you just like this particular car because you think it's cool?  You don't have to answer all of these questions, but these should get you thinking specifically about what YOU want the car to do. 
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fndrbndr

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Re: Nissan fairlady Z '03 tune setup
« Reply #3 on: October 13, 2010, 12:46:49 PM »
what follows is a write-up of my efforts to get familiar with a car that I liked in FM2, but hadn't even driven in FM3.  I'd apologize for the threadjack, but I think it's germane, and honestly, I wanted to do something like our old FM2 build threads in this section, so here goes . . .

OK, so I got curious and bought this car in-game just to see what it was like.  I had a relatively good one in B class in FM2.  I just finished fighting through a C-class RWD event, and have a couple of thoughts.  These are observations for road racing and hotlapping, and may not be valid for oval racing, drifting, or drag racing.

Issues and Observations

1.  A custom gearbox may be in order.  At Suzuka, I found myself reaching for a gear somewhere between second and third on the transition between the esses and the straight.

2.  I usually go custom suspension all around anyway, but here, I would probably get different sway bars IRL.  It sets for a single turn nicely, but you end up oversteering without knowing it, and transitions in the esses are a bit iffy.  The car doesn't like to have its weight tossed around.

3.  The car seems heavy.  Yes, I know, that's because every car seems heavy to me.  I'd pull out the non-human ballast incrementally.  You might be able to save some PI by only taking out some of the weight.

4.  The car wallows a bit.  It's not as responsive as I'd like.  Some of this is the suspension, but I'll look chassis stiffening next time I'm on. 

With these considerations in place, It's time to look at what this car might and might not do well.

Target Tracks

Twisties-It's going to take some tuning to be a solid mongoose. The car's basic feel is pretty good, and it is pretty benign at the limit, but I'm not sure it will ever be light enough to contend with the Miatas, 240Z's, and RX-7's you'll find at Tsukuba.  It certainly won't contend with the AWD leaderboard cars.

Flowing tracks-  If the sway bar issue is easily resolved, this car could do well on these sorts of tracks.  The powerplant seems to hum right along at speed.  When the car cooperated, it felt good ont he esses, and showed some real potential.  I'll try this car on Mugello and Maple Valley when I'm testing upgrades.

Power tracks-No determination as of yet.  The car didn't seem to hit a wall on the Suzuka straight, but I'm not sure what would happen if I took it to Sunset Peninsula's infield course or over to Sebring.  The car's usefulness as a power car will probably be down to how much power you can cram under the hood at your desired PI point.  It seems sufficiently slippery, but it's not a 2000GT.

Drag-no idea.

Oval-see power.

Drift-I'm not a drifter, but this car seemed to like a little angle going through the esses.  I inadvertently pulled off a 2,000 point drift, which is something I can only rarely do on purpose.  I won't be building it this way, but there's probably a reasonably good drift car in here somewhere.

Target Class

The car starts out in C.  There are basically three options for builds on this car.  The first is to keep the power stock and turn the car into a superstocker.  Upgrade the chassis/suspension, lighten the car, drop in a few hipo parts, slap on some better rubber, etc., but keep the car a Z as much as possible. There's probably room to create a pretty solid C-class all-arounder with that approach, but you'll probably have to keep a lot of weight, and it will take some experimenting to find the optimal combination of tire compound and width for your driving style.

Moving up to B class, you can basically take the all-you-can-eat approach to the plan I laid out for C.  Go with race weight, a roll cage, full-width slicks, and probably the race transmission.  Just use power to fill up to the top of B class.  Adjust aero to taste, and you're good to go.

In A, you're looking at an all-out race car.  Think a GT class Rolex car.  Same as above, but add lots of power and some adjustable aero.  The aero will probably help most on the flowing and twisty tracks, and will cost you some top end on the power tracks. 

Don't know whether that helps you or not, but I certainly enjoyed going through the process again.  Up next: picking test tracks.
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fndrbndr

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Re: Nissan fairlady Z '03 tune setup
« Reply #4 on: October 14, 2010, 01:18:39 PM »
So I went the C-class route, trying to get a feel for the car before I do anything too extreme.  I was able to get all the adjustable parts on, street weight, sport tires, race clutch, and 245's (I THINK) on all four corners.  (If it wasn't 245's it was 235's all the way around)  The car still handles much as it did before.  The main difficulty is a tendency to oversteer if I'm not WAY more gentle with the throttle than you'd think necessary with a car this tame.  I'm hoping to tame this with some shock tuning, but this means getting better at shock tuning.  More details to come.
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fndrbndr

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Re: Nissan fairlady Z '03 tune setup
« Reply #5 on: October 14, 2010, 08:11:40 PM »
A little less rear rebound, and the car is starting to come around.  I'm trying to figure out just how much of the car's issues are tune and how much are build (read: weight).  Right now, it's still a bit of a handful, but it's improving every time I change something.  This is an achievement, because usually when I change things, they get worse before they get better. lol
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Blooze

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Re: Nissan fairlady Z '03 tune setup
« Reply #6 on: October 14, 2010, 09:26:15 PM »
I went and checked what I did with the Dampers on my 2010 370Z and it was basically the same thing, only I stiffened the front - Rebound and Bump by 2 tenths each.  That seemed to help with that snap back oversteer that is such a pain in the chicanes and such.

Your doin' good work here...

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fndrbndr

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Re: Nissan fairlady Z '03 tune setup
« Reply #7 on: October 15, 2010, 10:48:42 AM »
My shock tuning before this has basically been limited to reducing/increasing the shock settings by about the amount I've reduced/increased spring rates.  It's the one part of tuning that hasn't really clicked for me before.  I'm trying to learn the stuff I should already know.  So far so good on that front, I guess.  The car may not have the available upgrades to be really competitive, though.

In C, it's a little on the portly side.  I'm trying to fix this by making the car move its weight around as smoothly as possible, hence my newfound interest in shock tuning.  I'm seeing some results, but the thing still needs two days' notice if you want to stop, and tends to come up on the edge of traction a little more quickly than it feels like it should.  This is fun when you want to load the front wheels with a little lift oversteer, but it's not particularly fast.

In C, race WR and a cage will be vast improvements.  Tire, though, may be a limiting factor.  There's WAY more tire available on the rear of the car than the front for some reason, so if I want my usual matching front and rear tires, I'm going to be limited to about 255's or so.  Those aren't exactly rubber bands, but they're still going to be a limiting factor.  At the very least, my A-class idea is a non-starter because of this.

For now, the plan is to drive it a little more in C, get the shocks dialed in, save that build/toon as a daily driver that hits the track on occasion, then try to make a full-on IT/Conti Challenge type car in B.  More updates to come.

Aside:  Did xboxlordz360 ever come back to check this thread? lol
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Blooze

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Re: Nissan fairlady Z '03 tune setup
« Reply #8 on: October 15, 2010, 11:08:21 AM »
Nope - he hasn't been back online since the 11th.  I don't know if he saw our replies or not.  I think he was more interested in getting a turn-key Toon rather than get involved with all that pesky learning.

I have two of the Z cars, the 2010 370Z and the 2003 Forza Cover Car.  Its an S class car.  They both feel "not quite" to me.   Not quite enough grip, not quite enough accelleration, not quite enough top speed...  even if one goes bonkers for one handling trait over another, it still seems to Not Quite make it.

The Forza Z car has the AWD conversion too...  I thought that might make it more competitive, but the Audi R8 Cover Car is pretty much all over the Nissan.

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Spiny Anteater

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Re: Nissan fairlady Z '03 tune setup
« Reply #9 on: October 15, 2010, 12:19:28 PM »
I had the same problem with damping tuning fndr until Feuerdog kindly gave me a good few steers at the start of the year (the thread will still be hanging around this place somewhere [like here: :) http://forza-tuning.net/index.php/topic,1300.0.html]). I had shied away from it up until then as I wasn't really sure what I was doing and didn't want to mess up cars by going badly wrong. FD put me on the right path (after a few dead ends from me) and I have to say that damping is one of my main sources of adjusting the car - generally I look to ARBs and maybe springs for steady state cornering characteristic and damping for the transitions.
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fndrbndr

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Re: Nissan fairlady Z '03 tune setup
« Reply #10 on: October 15, 2010, 03:12:27 PM »
That's quickly becoming my approach.  I tend to notice the steady-state stuff first, but the issue here was clearly a weight transfer issue.
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fndrbndr

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Re: Nissan fairlady Z '03 tune setup
« Reply #11 on: October 19, 2010, 12:31:49 PM »
B build has the same issue Blooze spoke about, being "almost" an all-arounder.  You can't get enough rubber to justify the power you'd need to hit A class, but a race-prepped B-classer is drivable, if not particularly fast or interesting.  Thus far, I'm rediscovering the need for smoothness.  Unlike an E class Miata, you can't just flog the crap out of this and expect to keep the nose facing forward.  I'm going to put this on the back burner, since I'm working on a midterm, but I'll try to throw my toon on this thread next time I'm on.
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