Nissan 370Z wobbly at high speed

TexasChuck · 01-06-2016, 05:08 PM

Tire pressure or tires could very well be it. If not, something is seriously wrong. Don't be guessing. Have it checked out. These cars don't do that....even at 143 mph.
Chuck

kenchan · 01-06-2016, 05:09 PM

Quote:

Originally Posted by Drebbel

For guys who are pushing crazy Whp, have you had any oh **** moments? Lol And how snappy is the lose of traction.

depends on tire and psi..and driving input.

JARblue · 01-06-2016, 05:14 PM

Quote:

Originally Posted by Drebbel

For guys who are pushing crazy Whp, have you had any oh **** moments? Lol

A stock Z can give you "oh $hit" moments if you're inexperienced. It's not funny either.

Quote:

Originally Posted by Drebbel

And how snappy is the lose of traction.

Depends on the tire.

JARblue · 01-06-2016, 05:17 PM

Quote:

Originally Posted by Drebbel

I noticed twice nowwhen at speeds of 100+ the Z feels really unstable.

Why on earth would you repeat a 100+ mph maneuver if it feels unstable?

As mentioned ... alignment, tire wear, tire pressure, suspension could all be the culprit. Check what you can and take it somewhere if you still have problems

kenchan · 01-06-2016, 05:18 PM

i suppose it is safer to feel unstable than false sense of stability with an awd falling off a cliff..

ban25 · 01-06-2016, 10:22 PM

Even if everything is in good shape, you may simply not have good enough tires for that speed. I've been over 140 MPH at ACS and the car feels very light at that speed even with RE-71Rs. I suspect it'd be frightening with lesser tires. Downforce will help greatly, though it might also induce enough drag such that it's hard to hit that speed.

VDC is extremely invasive. EcuTek's RaceRom TCS is vastly better. I typically run with it set at 60% on the track and it does not feel intrusive at all. I highly recommend it!

Since you mentioned sweeping turns, I'll also note that you may be encountering the dreaded fuel starvation if it's a sweeping right hander. You don't need to be low on gas to hit it, two dots from full will do it for me.

Rusty · 01-06-2016, 10:36 PM

Quote:

Originally Posted by FPenvy

ritual when getting in the Z:

sit.
foot on brake.
press start.
press vdc off.
go.

usually plugging in the ipod as well lol

Quote:

Originally Posted by kenchan

why foot on brake?

ohhhhhhhhhh...lololtrollololl

Quote:

Originally Posted by FPenvy

dammit.

He's thinking that (wishing) he had a 3rd pedal.

Rusty · 01-06-2016, 10:45 PM

OP,
1st check tire pressure.

2nd tire wear. Get under the Z and have a good look at the inside of the rear tires.

3rd check your alignment. If the toe is zero to pointing out. It will feel loose in the rear. Also it will give you snap-over steer.

For street (DD) you want the factory spec of being toe in. Zero toe and out is not for beginners.

Redman24 · 01-06-2016, 11:20 PM

I have your same model and have had it on the track well over 150. Stock suspension and good tires. Slid it around corners at 120. A real fun time. No wobbles. I have a life time balance and alignment with Firestone and use it.

mishuko · 01-07-2016, 09:17 AM

Quote:

Originally Posted by Drebbel

For guys who are pushing crazy Whp, have you had any oh **** moments? Lol And how snappy is the lose of traction.

are you using stock tires that are worn in the rain or cold? because i've had a few moments in those conditions and all i have are breather mods.

the o-chit moments i find is when something unexpected happens or you try something new in an unsafe environment. ie trying to drift when you've never driven a RWD car before.

Quote:

Originally Posted by Drebbel

So the clutch issue is definitely going away. Or so I think. I'll definitely check air pressure tomorrow. I had a low tire pressure light today but, it was freezing cold last night too. I hope it's something simple. No more spirited runs for a while��

for your cars sake you probably shouldn't be any spirited moments in freezing temps. regardless of tires.

Quote:

Originally Posted by kenchan

i suppose it is safer to feel unstable than false sense of stability with an awd falling off a cliff..

but atleast you know you're falling with awd. i mean who would want to fall with just rwd or fwd?

FPenvy · 01-07-2016, 09:27 AM

Quote:

Originally Posted by Rusty

He's thinking that (wishing) he had a 3rd pedal.

it would make sense to have three pedals with having three legs.....

Drebbel · 01-07-2016, 10:13 AM

I bought this car from the dealer. And today I checked the tire pressure and the front right was almost 50, the left front 30 and the rear two at 38. Thanks Mastria Nissan.

The car feels fine now. No more wobble, much more stable than before. Still clutch is very slow. I'll be looking into that helper spring DIY. Thanks for the input everyone.

kenchan · 01-07-2016, 10:21 AM

U see, very simple

FPenvy · 01-07-2016, 10:22 AM

Quote:

Originally Posted by Drebbel

I bought this car from the dealer. And today I checked the tire pressure and the front right was almost 50, the left front 30 and the rear two at 38. Thanks Mastria Nissan.

The car feels fine now. No more wobble, much more stable than before. Still clutch is very slow. I'll be looking into that helper spring DIY. Thanks for the input everyone.

never ever trust a dealer.

you know how to solve your slow transmission problem?

get the 7AT lol

FPenvy · 01-07-2016, 10:22 AM

also for tires I typically run mine at 32-34psi

01-06-2016, 05:08 PM	#16 (permalink)
TexasChuck Track Member Join Date: Oct 2012 Location: SE Texas Posts: 556 Drives: 2014 Black Cherry Co Rep Power: 14	Wobbly Tire pressure or tires could very well be it. If not, something is seriously wrong. Don't be guessing. Have it checked out. These cars don't do that....even at 143 mph. Chuck mishuko likes this.

01-06-2016, 05:18 PM	#20 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	i suppose it is safer to feel unstable than false sense of stability with an awd falling off a cliff.. TerribleONE, JARblue, somms and 1 others like this.

01-06-2016, 10:22 PM	#21 (permalink)
ban25 Enthusiast Member Join Date: Nov 2009 Location: SF, CA Posts: 339 Drives: 17 C7 Z06 M7 Rep Power: 66	Even if everything is in good shape, you may simply not have good enough tires for that speed. I've been over 140 MPH at ACS and the car feels very light at that speed even with RE-71Rs. I suspect it'd be frightening with lesser tires. Downforce will help greatly, though it might also induce enough drag such that it's hard to hit that speed. VDC is extremely invasive. EcuTek's RaceRom TCS is vastly better. I typically run with it set at 60% on the track and it does not feel intrusive at all. I highly recommend it! Since you mentioned sweeping turns, I'll also note that you may be encountering the dreaded fuel starvation if it's a sweeping right hander. You don't need to be low on gas to hit it, two dots from full will do it for me. __________________ 2017 Corvette Z06 7MT \| 1LE \| Stage 3 \| DSCSport

01-06-2016, 10:45 PM	#23 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,180 Drives: 2011 Nismo GM 6M Rep Power: 2684437	OP, 1st check tire pressure. 2nd tire wear. Get under the Z and have a good look at the inside of the rear tires. 3rd check your alignment. If the toe is zero to pointing out. It will feel loose in the rear. Also it will give you snap-over steer. For street (DD) you want the factory spec of being toe in. Zero toe and out is not for beginners. SouthArk370Z and hooey_b like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

01-06-2016, 11:20 PM	#24 (permalink)
Redman24 Base Member Join Date: Nov 2014 Location: Pittsburgh, PA Posts: 32 Drives: 14 370Z Trng, Wht, A Rep Power: 11	I have your same model and have had it on the track well over 150. Stock suspension and good tires. Slid it around corners at 120. A real fun time. No wobbles. I have a life time balance and alignment with Firestone and use it. __________________ Enjoying life every moment at a time.

01-07-2016, 10:13 AM	#27 (permalink)
Drebbel Base Member Join Date: Nov 2015 Location: Andromeda Posts: 9 Drives: MAT-V Rep Power: 9	I bought this car from the dealer. And today I checked the tire pressure and the front right was almost 50, the left front 30 and the rear two at 38. Thanks Mastria Nissan. The car feels fine now. No more wobble, much more stable than before. Still clutch is very slow. I'll be looking into that helper spring DIY. Thanks for the input everyone. Initial Z likes this.

01-07-2016, 10:21 AM	#28 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	U see, very simple Initial Z likes this.

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