Date:         Wed, 24 Apr 2002 10:38:18 -0700
Reply-To:     Alistair Bell <albell@UVIC.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alistair Bell <albell@UVIC.CA>
Subject:      Re: Tiico: Harmonic balancing pulley
Comments: To: Matthew Pollard <poll7356@uidaho.edu>
In-Reply-To:  <Pine.GHP.4.30.0204240957430.18396-100000@falcon.csrv.uidaho.edu>
Content-type: text/plain; charset="US-ASCII"

Matthew,

I think it was Gary Stearns that posted a few messages outlining his
experiences with vibrations and some solutions. Engine mounts, resonant
chambers, added weights, alternator mounts were some of the areas covered.

The size and kind of muffler, and the method of exhaust
attachment/joints/flex joints also have an effect on the 3k-3.5k buzz.

David Marshall posited that the exhaust system was the main culprit. His
test was the application of a human foot to the tail pipe or muffler and
pushing down (reasonably) as an assistant revs the engine. He claimed that
if this dampened the resonances, then the suspension of the muffler et al
was to blame.

My opinion is that the exhaust system certainly plays a big part, but also
the engine and transmission mounts are the problem. Frank Grunthaler and
myself were discussing this last spring/summer. He is way ahead with
developing a better engine mount.

Alistair


--
'82 Westy -> diesel converted to gas in '94
albell@uvic.ca
http://homepage.mac.com/alistairbell/home/





on 24/04/2002 10:03 AM, Matthew Pollard at poll7356@UIDAHO.EDU wrote:

> Does that sort of mean it helps but there are some bigger vibrations that
> first need to be addressed? So the use of steel pipe filled with sand
> bolted to the header is a better solution?
>
> do the vanagons that have native inline 4's (as opposed to a conversion.
> Not diesel) have this problem? What is different- engine mounts, exhaust??
> what about fastforward.ca conversions?
> -matthew
>
> On Wed, 24 Apr 2002 vgonman@earthlink.net wrote:
>
>> BTDT, didn't make too much of a difference.
>>
>> Sean B.
>>
>>> Has any tiico freak out there put a harmonic balancing pulley on their
>>> tiicos (say, a pulley off of a jetta/golf/wabbit/rocco/fox.etc). Would
>>> it help to chill out those burley vibes we get at 3.4K rpm?
>>>
>>> Thanks
>>> matthew
>>> 86 syncro westy tiico w/ vibes
>