Vibration between 70 to 90 driving me crazy

Z4TONY · 01-02-2016, 03:14 PM

I tried it all wheel check (stock 18s) no dents or any damage tires only 3k on then Bridgestone stock size - changed rotors and pads twice nothing!! Same vibration. Did road force still nothing. Now i am thinking engine or tran mounts but its a 2010 roadster with 20k on it! Some mechanics are saying drive train issue some saying everything looks good buy new tires or wheels. I really need advice please help. Only mods are exhaust, pipes, intake ..thx

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fryzia23 · 01-02-2016, 03:27 PM

How many lbs road force on each tire? do you have a printout? Did you replace tires with the same exact bridgestones?

Z4TONY · 01-02-2016, 04:30 PM

Yes same tires as stock.. No print out? They gave me nothing

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SouthArk370Z · 01-02-2016, 06:46 PM

The most common causes of vibration: tires, brake rotors (usually stronger when braking), and drive shaft. Could be a bearing, u-joint, &c going bad.

Can you narrow down where the vibration is coming from (one particular corner, front or back, &c)? Does it change in pitch or amplitude; if so, with engine speed, vehicle speed, or what?

Z4TONY · 01-02-2016, 07:12 PM

Front end, noticeably on steering wheel and pedals mainly on speeds higher than 65 or 70. This is really strange also lately at idle/ red light etc i feel a very light engine vibration in the steering wheel as well you know that 4 cylinder feel

but goes when I accelerate. Not sure if normal or what? Again I did minor HP Mods i would say an extra 35 or so HP. I had the mechanic check the drive shaft he said looks perfect! He did notice some wrapping on the drive shaft of some sort towards the front end but seem factory normal! Not sure what's my next move. Thx

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TechnicZ · 01-02-2016, 07:45 PM

Quote:

Originally Posted by Z4TONY

Front end, noticeably on steering wheel and pedals mainly on speeds higher than 65 or 70. This is really strange also lately at idle/ red light etc i feel a very light engine vibration in the steering wheel as well you know that 4 cylinder feel

but goes when I accelerate. Not sure if normal or what? Again I did minor HP Mods i would say an extra 35 or so HP. I had the mechanic check the drive shaft he said looks perfect! He did notice some wrapping on the drive shaft of some sort towards the front end but seem factory normal! Not sure what's my next move. Thx

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probably normal man, i'm in NJ and there are no perfect roads here so i'm used to adjusting my steering constantly. What tires are you running? No issues here with my psi set at 35 on 265 RE11's. Remember not all tires are created equal.

JC-Nismo · 01-02-2016, 07:54 PM

Check your torque specs man, you'll be surprised how much it will throw vibrations in your setup. I torque my lug nuts to 110 lbs, but I'm sure the resident experts can confirm the specs for sure. Good luck on finding a remedy.

SouthArk370Z · 01-02-2016, 08:24 PM

Quote:

Originally Posted by Z4TONY

Front end, noticeably on steering wheel and pedals mainly on speeds higher than 65 or 70. ...

I'd try bedding the brakes. Sounds like it could be deposits on the rotors.

YzGyz · 01-02-2016, 08:32 PM

I would get all 4 corners balanced. That's usually the first thing I check. Then ask the tire guy to take a look at the rotor while the tires are off. If the tires are balanced and rotor still good. Put the car in the air and wiggle each wheel to see if you have bad ball joints ect.

YzGyz

Spooler · 01-02-2016, 08:36 PM

Quote:

Originally Posted by JC-Nismo

Check your torque specs man, you'll be surprised how much it will throw vibrations in your setup. I torque my lug nuts to 110 lbs, but I'm sure the resident experts can confirm the specs for sure. Good luck on finding a remedy.

WOW, spec for our car is only 85 ft/lb of torque on the lug nuts.

DeliriousClam · 01-02-2016, 08:39 PM

Yeah this **** started with mine after I put spacers on

fryzia23 · 01-03-2016, 12:16 PM

Quote:

Originally Posted by Z4TONY

Front end, noticeably on steering wheel and pedals mainly on speeds higher than 65 or 70. This is really strange also lately at idle/ red light etc i feel a very light engine vibration in the steering wheel as well you know that 4 cylinder feel

but goes when I accelerate. Not sure if normal or what? Again I did minor HP Mods i would say an extra 35 or so HP. I had the mechanic check the drive shaft he said looks perfect! He did notice some wrapping on the drive shaft of some sort towards the front end but seem factory normal! Not sure what's my next move. Thx

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So you feel the vibration on speeds of 65-70mph during braking only or just cruising?

Z4TONY · 01-03-2016, 08:07 PM

Cruising only no braking issues

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Rusty · 01-03-2016, 10:18 PM

Tires. How many miles? Thread depth? How they wearing? Camber wear? Feathering of tread blocks? Flat spots?

Z4TONY · 01-03-2016, 10:28 PM

I am leaning towards the tires myself but trial in error is starting to get expensive

only around 3 or 4 thousand miles max on tires but I will double check thread in detail tomorrow and reply back

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01-02-2016, 03:14 PM	#1 (permalink)
Z4TONY Base Member Join Date: Sep 2014 Location: Virginia Posts: 45 Drives: 370z Roadster Tourin Rep Power: 11	Vibration between 70 to 90 driving me crazy I tried it all wheel check (stock 18s) no dents or any damage tires only 3k on then Bridgestone stock size - changed rotors and pads twice nothing!! Same vibration. Did road force still nothing. Now i am thinking engine or tran mounts but its a 2010 roadster with 20k on it! Some mechanics are saying drive train issue some saying everything looks good buy new tires or wheels. I really need advice please help. Only mods are exhaust, pipes, intake ..thx Sent from my iPhone using Tapatalk

01-02-2016, 06:46 PM	#4 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	The most common causes of vibration: tires, brake rotors (usually stronger when braking), and drive shaft. Could be a bearing, u-joint, &c going bad. Can you narrow down where the vibration is coming from (one particular corner, front or back, &c)? Does it change in pitch or amplitude; if so, with engine speed, vehicle speed, or what? __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

01-02-2016, 08:32 PM	#9 (permalink)
YzGyz A True Z Fanatic Join Date: Jun 2013 Location: Houston Posts: 1,449 Drives: 2010 Nismo Rep Power: 63	I would get all 4 corners balanced. That's usually the first thing I check. Then ask the tire guy to take a look at the rotor while the tires are off. If the tires are balanced and rotor still good. Put the car in the air and wiggle each wheel to see if you have bad ball joints ect. YzGyz __________________ http://www.the370z.com/members-370z-...gyzs-turn.html YzGyz

01-02-2016, 08:39 PM	#11 (permalink)
DeliriousClam A True Z Fanatic Join Date: May 2015 Location: NJ Age: 31 Posts: 3,758 Drives: 12 Base Sport Rep Power: 54272	Yeah this **** started with mine after I put spacers on __________________ Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet MECP Advanced: CEA26671 Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

01-03-2016, 10:18 PM	#14 (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	Tires. How many miles? Thread depth? How they wearing? Camber wear? Feathering of tread blocks? Flat spots? __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

01-02-2016, 03:27 PM	#2 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	How many lbs road force on each tire? do you have a printout? Did you replace tires with the same exact bridgestones?

01-02-2016, 04:30 PM	#3 (permalink)
Z4TONY Base Member Join Date: Sep 2014 Location: Virginia Posts: 45 Drives: 370z Roadster Tourin Rep Power: 11	Yes same tires as stock.. No print out? They gave me nothing Sent from my iPhone using Tapatalk

01-02-2016, 07:12 PM	#5 (permalink)
Z4TONY Base Member Join Date: Sep 2014 Location: Virginia Posts: 45 Drives: 370z Roadster Tourin Rep Power: 11	Front end, noticeably on steering wheel and pedals mainly on speeds higher than 65 or 70. This is really strange also lately at idle/ red light etc i feel a very light engine vibration in the steering wheel as well you know that 4 cylinder feel but goes when I accelerate. Not sure if normal or what? Again I did minor HP Mods i would say an extra 35 or so HP. I had the mechanic check the drive shaft he said looks perfect! He did notice some wrapping on the drive shaft of some sort towards the front end but seem factory normal! Not sure what's my next move. Thx Sent from my iPhone using Tapatalk

01-02-2016, 07:54 PM	#7 (permalink)
JC-Nismo A True Z Fanatic Join Date: Sep 2014 Location: Atlanta Posts: 1,244 Drives: 2011 Nismo 370z Rep Power: 13	Check your torque specs man, you'll be surprised how much it will throw vibrations in your setup. I torque my lug nuts to 110 lbs, but I'm sure the resident experts can confirm the specs for sure. Good luck on finding a remedy.

01-03-2016, 08:07 PM	#13 (permalink)
Z4TONY Base Member Join Date: Sep 2014 Location: Virginia Posts: 45 Drives: 370z Roadster Tourin Rep Power: 11	Cruising only no braking issues Sent from my iPhone using Tapatalk

01-03-2016, 10:28 PM	#15 (permalink)
Z4TONY Base Member Join Date: Sep 2014 Location: Virginia Posts: 45 Drives: 370z Roadster Tourin Rep Power: 11	I am leaning towards the tires myself but trial in error is starting to get expensive only around 3 or 4 thousand miles max on tires but I will double check thread in detail tomorrow and reply back Sent from my iPhone using Tapatalk

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