Vibration and noise during track event - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-18-2007, 11:59 AM   #1
!!! NOT CONFIRMED !!!
Thread Starter
iTrader: (3)
 
Join Date: Nov 2006
Location: Evington, VA
Posts: 89
Total Cats: 0
Default Vibration and noise during track event

Had a track day event this past weekend at VIR. I was scheduled to run four-25 minutes sessions per day but on my third run on my first day, on hard braking/down shifts and especially on right turns, the car started making vibrating noises under my feet. The instructor and I noticed it at the same time. I jacked it up to see if my downpipe was hitting something or the exhaust broke loose, like a missing hanger or a busted clamp but everything looked good. Drive shaft and the u-joints - OK. Suspension components - OK. Wheels and bearings - fine. I cannot recreate it on the road and it looks like it only can be recreated during track conditions with high heat, speed and G's.

I eventually packed up after the 4th run because it only got worse and went home pissed off because I could not find anything obviously lose underneath and didn't want to risk anything. Any ideas or similar experience? I'm going to pull the down pipe to see if it's that hitting against the transmission tunnel.
Virus is offline   Reply With Quote
Old 06-19-2007, 07:00 PM   #2
Senior Member
iTrader: (7)
 
Join Date: Mar 2005
Location: VT
Posts: 939
Total Cats: 0
Default

Wheel balance, thrown wheel weight? broken motor mount?
Jefe is offline   Reply With Quote
Old 06-19-2007, 08:11 PM   #3
Junior Member
 
Join Date: Feb 2006
Location: Greenville, NC
Posts: 211
Total Cats: 0
Default

WORMS?

Sometimes I can get SERIOUS worms on my tires at VIR. I have had a similar feeling several times on different cars.
ecugrad is offline   Reply With Quote
Old 06-20-2007, 01:08 PM   #4
!!! NOT CONFIRMED !!!
Thread Starter
iTrader: (3)
 
Join Date: Nov 2006
Location: Evington, VA
Posts: 89
Total Cats: 0
Default

Quote:
Originally Posted by ecugrad View Post
WORMS?

Sometimes I can get SERIOUS worms on my tires at VIR. I have had a similar feeling several times on different cars.
Imagine the exhaust banging against something real fast. That's what it felt like...that's probably what it is. Jeremy @ FM said it may have been that my rubber hangers got hot and more pliable causing the exhaust system to swing around more.

Suggestion is to get poly hangers and replace the diff mounts. My engine mounts are already Mazda comp units with 3K miles on them.
Virus is offline   Reply With Quote
Old 06-20-2007, 01:57 PM   #5
Senior Member
iTrader: (2)
 
SamS's Avatar
 
Join Date: Jun 2006
Location: Wisconsin
Posts: 1,254
Total Cats: 7
Default

Sounds exactly like my downpipe...
SamS is offline   Reply With Quote
Old 06-22-2007, 05:51 PM   #6
Senior Member
iTrader: (8)
 
Join Date: Mar 2006
Location: Floriduh
Posts: 882
Total Cats: 0
Default

Are you using adjustable swaybar endlinks? If so, the swaybar may have moved all the way to one side, forcing the tire to contact it on right turns. My RB bar did that, until I recentered it and put rubber sleeves and hose clamps on the bar to keep it centered.
soflarick is offline   Reply With Quote
Old 06-22-2007, 09:15 PM   #7
Elite Member
iTrader: (3)
 
Join Date: Dec 2004
Location: Houston
Posts: 2,904
Total Cats: 4
Default

rotors?
Pitlab77 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Another Alternator thread ihiryu General Miata Chat 9 09-28-2015 11:22 AM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:31 AM.