rough-riding kumhos?

[jsoutherland16 at attbi.com (Jeff Southerland)]

How about ball joints?
I dunno,  Jeff


----- Original Message ----- 
From: "Allyn" <amalventano@sc.rr.com>
To: "scirocco list" <scirocco-l@scirocco.org>
Sent: Thursday, June 12, 2003 12:57 AM
Subject: OT: rough-riding kumhos?


> has anyone had any ride issues with kumhos (or any vibration issue that
> ended up being tires - any brand of tires?).
> im begining to think the rieger vibration is caused by tire compound not
> being consistent.
>
> symptoms:
> - light vibration, feeling like slight tire imbalance, peaking at 67-68
mph
> - vibration is amplified greatly by acceleration (i can actually control
the
> vibration with the throttle)
> - 0 vibration in steering wheel, yet the vibration seems to be coming from
> front-right (hard to tell for sure though)
>
> corrective actions taken so far (not necessarily for this specific
problem,
> but changed nonetheless):
> - engine mounts - 1 yr old
> - front wheel bearings - 1 yr
> - all suspension bushings - 1 yr
> - wheels/tires mounted - 2 months
> - wheels re-balanced - 1 month
> - pass. half shaft - 1 month
> - rear wheel bearings - 1 month
> - front/rear rotors - 1 month
> - alignment - 1 month (adjustments were made, no effect on vibration at
all)
> - all 4 wheels straightened and balanced within 0.08 oz. (dynamic),
balance
> verified by re-mounting wheel rotated to various positions on the
balancer -
> right before cincy
> - dvr. half shaft - at cincy (i thought this licked the problem, turns out
i
> just didnt keep the correct speed for long enough).
>
> when the wheels were straightened, i noticed that some other slight
> vibrations had disappeared, leaving only the single vibration. this
> vibration is now worse since the other vibrations are not present to help
> cancel its resonance.
>
> my intention is to try swapping wheels between the rieger and jetta to see
> if the vibration follows. also, once i verify the wheels are actually
> straight, i may have to do a road force balance or something like that.
all
> i know is that this vibration is driving me nuts.
>
> any help/advice appreciated.
> thanks in advance.
> Al
>
>
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