This vibration was my primary complaint of our 77 Rabbit we owned.  Yes,
around 4k.  Let's see, what engine did that Rabbit have in it?

DM&FS
----- Original Message -----
From: "Bill Knight" <bill.knight@USA.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, September 18, 2001 7:39 AM
Subject: Re: TiiCo Update

> That vibration is my primary complaint with the TiiCo conversion.  In my
> situation, the vibration occurs under heavy acceleration.  In fact, it
> resonates all the way up to the shift lever an makes it buzz!
>
> If you find out any solutions, please post them.  I do love the added
power
> of the conversion but hate the vibration.  I also need to change the
muffler
> because it sounds awful through the stock system.
>
> Bill Knight
> Raleigh, NC
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf Of
> Gary Stearns
> Sent: Tuesday, September 18, 2001 8:23 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: TiiCo Update
>
>
> Following is a message I sent to Peter at TiiCo this morning.  Thought it
> might be useful reading for other TiiCo-ists.
>
> Hi Peter:
> Our SA engine has been in and running well for about 1500 miles.  22 mpg
and
> it goes!  Ours you might recall also has the Weddle 5 speed attached to
it.
> What a spectacular combination.   We also have  a "sport" type exhaust on
> the engine.  This consists of a 55mm catalyst from a 16V Scirocco ( I
think
> the largest VW has made), a 2.5" Walker MagnaFlo muffler (basically a 6"
> diam. welded glass-pack), and a 2.25" stainless tailpipe.  Great music and
> great power. Certainly louder than stock but not intrusive.  After living
> with this combo for a little while, I felt as though the engine was
running
> a little lean (even after setup on the VAG 1552).  Knowing that this can
> happen with "open" exhausts that create a fuel need beyond the injection
> system's ability to compensate, I added an adjustable fuel pressure
> regulator with a gauge.  Stock regulator showed 28-30 PSI, which is about
> where it should be.  I bumped the adjustable regulator to 35PSI.  Wow.
Now
> more lean stumbles,  throttle response is instant, top end just keeps
> pulling.  Try it!   Finally, a critical change.  We replaced the "GL"
badge
> on the hatch with an original "GTi" badge.
>
> A question.  I do get a pretty significant vibration/resonance coming
> through the body at about 4000 rpm when accelerating.  I know that this is
a
> typical problem with inline 4 cyl engines, but I also know that it can be
> tuned out.  I have not been able to figure out if the vibration is coming
> from my non-stock exhaust (could be, it has broken 2 marginal welds made
by
> me already) or if the motor mounts are bottoming out and sending vibes
into
> the body.  I have tried various combos of adjustment on the exhaust mounts
> which do make some difference, but I don't think that's it.  To me it
> actually looks like the right motor mount bracket might be squeezing
inward
> too much and making contact with the rubber on the mount itself under hard
> acceleration when the engine is trying to twist.  I'm thinking I might
> either pursuade it with an 8 lb. sledge, or remove the mount and slot the
> mount hole to move ita way from the bracket more. Have you had any
> experience with this?
>
> Thanks for making this kit available!  Our Vanagon is a whole different
> animal!
>
> Gary
>
>
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