Bad Vibrations

Old 02-09-2008, 06:09 AM
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Angry Bad Vibrations

Can any of you guys help. I've an AP1 with 18'' Kahn RSV's on my car and 40k miles on the clock. (18 x 10 on the back, 18 x 9 on the front) I bought the car with these already fitted. The suspension etc is all standard to the best of my knowledge.
Basically, my problem is that I am getting intermittent vibrations through the car while driving on good roads (cruising at say 60-70 mph) in sixth gear in normal weather conditions.
I've only had the car serviced two days ago and the mechanic told me as far as he could see the car is absolutely mint.
Any of you guys have any ideas as what could be causing this?

Regards,

From the Emerald Isle
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Old 02-09-2008, 06:24 AM
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Car can be brand new john, if the wheels/tires r' oud'a balance it don't mean diddly. That'd be where I spent my money with what you describe. 'Sounds like someone was overly anxious ta get his new tires/wheels on the car n' didn't gedditt done, 'r, at least, done right.
Take it to a reputable alignment/wheel/tire shop n' let 'em go over it n' don't forget to check the rear specs too. IRS. No, the other IRS: Independent Rear Suspension.
Be well,
Java

Last edited by Java Junky; 02-12-2008 at 12:11 PM. Reason: Extra time, a rarity
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Old 02-09-2008, 06:32 AM
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Cheers Mr. Junky
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Old 02-09-2008, 07:06 AM
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I agree with the tires/wheels may be out of balance or a lug may be loose.
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Old 02-09-2008, 08:05 AM
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Whats happend to me in the past is a tire defect, felt more at higher revolutions.


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Old 02-09-2008, 09:02 AM
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I've been through something similar, but with a 77 280Z. Tire balance, new tires (even a new set that were out of round, so they were replaced), still vibrations. The vibration was in a 30 second cycle, it would come (steering wheel would shake wildly) and go to a smooth ride. Trip from Twin Cities to Pennsylvania was really rough. Found that the real problem was in some other suspension bushings that held the rear differential in place. This was aggravated by the fact that I put a set of urethane bushings on the steering rack that tightened up the front end and pushed the problem being absorbed by the steering into the frame and the vibration. Putting in the standard rack bushings seemed to fix the problem, except that I could still sense a minute vibration cycle.

Also had a Mitsubishi Diamante that had a funny sideways jerk on long high speed turns that turned out to be a rear suspension bushing (40K miles), when lifted off the ground, there was a slight bit of slop when you grabbed and lifted the wheel.

Granted, this is not the same car (the S2000 is MUCH tighter than either of these cars), but the point is, that once you determine that the tires are balanced and round, start looking at shocks, tie rods, sway bar bushings, ball joints, drive shaft knuckles, differential mounts, wheel mounting bushings, etc.

Another thought would be to find someone that has an S2000 and swap wheels/tires for a quick drive. Be cautious though, this may not totally eliminate the wheels. It could be that the difference in tire/wheels could be amplifying another problem in the frame/suspension.

Troubleshooting some problems is an art, not a science.

Mike
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Old 02-09-2008, 10:33 AM
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When you have the tires balance checked and they put them back on the car, be sure they use a torque wrench to tighten the lugs. No impact!!!
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Old 02-11-2008, 11:03 AM
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Thanks for the advice. Will be getting wheels balanced and tracked in a few days. Too busy in work now.
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Old 02-11-2008, 11:37 AM
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Mr. Junky...I like it. Java finally getting the respect he deserves.
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Old 02-12-2008, 10:08 AM
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Oh I forgot to add the Sir!! Cheers Mr. Junky Sir!!
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Old 02-12-2008, 12:13 PM
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Brooklyn!!!
 
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I live in Brooklyn, so a very common occurrence here, is when you hit a nice-sized POTHOLE, you slightly bend your rim. Usually you can't see it too well visually, and you can't feel it when your driving slow, but you can IN FACT feel it when you are going about 50-70.

Good luck, let us know what happened
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Old 02-12-2008, 12:17 PM
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Sir??? Do I look like a sir to you maggot???
Now drop n' gimme 50!
Ooops! 'Sorry john.
If ya gedditt, it needs no explanation.
If ya don't . . . well, it defies explanation.
I believe the appropriate follow-up in today's parlance is lol.
(Which I alwayz knew ta be lots-of-luck, but have since found that it's been retreaded n' put in use for laugh-out-loud. Aaay! Ya can't make this stuff up, y'know?)
Be well,
Java

Last edited by Java Junky; 02-12-2008 at 12:32 PM. Reason: Cobwebs clearin'
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Old 02-12-2008, 12:34 PM
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hmmmmm......Non-com with a chip on his shoulder. never seen one of those before......LOL......


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Old 02-12-2008, 12:38 PM
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D.I. n' they all had the Rock'a @*#&in' Gibralter on'eir shoulderz.
Owyadoon Brett?
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Old 02-12-2008, 12:54 PM
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Ayyyyyy Java Junky!!!!

I just wanted to mention that it could've been a self-description. Wasn't pointed at anyone but me. Wide shouldered for a short guy..


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Old 02-12-2008, 12:59 PM
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You????
I said "Drop n' gimme 50" out loud n' oud'a habit I dropped n' wuz pumpin'.
Fear'z'a great teacher, inn'itt?
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Old 02-12-2008, 01:09 PM
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I'm guessing that alot of folks out there don't know about FEAR.
The kinda fear that puts you into complete auto-pilot mode....vs. just standing like a deer in the headlights, waiting for that semi to run you down.
Thank all your D.I. buddies for teaching ya how to stay alive.


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Old 02-12-2008, 01:17 PM
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We both know that's been done many times over, usually about the same time I open the ol' peepers on yet, another one.
Keep the faith Brett.
Java
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Old 02-12-2008, 01:25 PM
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Copy that........keeping faith. over.
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Old 02-18-2008, 11:57 AM
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Well just an update on my problem. Had the balancing and tracking done and had to replace the front tires. The alignment was off a fair bit and had caused both tires to wear badly on the inside.
I've now got 2 spanking new Goodyear Eagle F1's on the front so I'd expect no more problems. Thanks to all of you for the help.
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Old 02-18-2008, 12:42 PM
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The tires may be out of balance, and do you know if the tech checked the hub bearings?
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Old 10-16-2012, 05:00 AM
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I disagree that all vibrations are caused by tyre inbalance.My 2003 car with 58000 miles has a terrible shudder at variable speeds which lasts a few miles and then completly disappears? I do have an hard top fitted as its a GT model and that rattles to the extent it sounds like a case of budweiser in the rear.
I think the prop shaft or drive shaft may be the cause as it does seem a big problem whilst its happening but on short 10 mile runs to the office you cannot tell anything is awry.I have asked allsorts of people and some inform me to lose the hard top others say its a loose drive shaft or worn cv joint or even my diff is knackered but I am at a complete loss and may have to resort to taking it to a main Honda stealership worst luck.
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Old 01-07-2013, 08:44 PM
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what offsets are your wheels?
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Old 01-08-2013, 12:24 AM
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Originally Posted by jagg View Post
I'm guessing that alot of folks out there don't know about FEAR.
The kinda fear that puts you into complete auto-pilot mode....vs. just standing like a deer in the headlights, waiting for that semi to run you down.
Thank all your D.I. buddies for teaching ya how to stay alive.


jagg
D.I. (we were called cadre) was the worst job in the army. You go through basic training again and again. Kind of a military ground hog day. Thankfully, learning the Army system helped the move to division faculty. Much better and we always showed the "trench foot" movie just before lunch!
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