Do you run a fan on the water pump pulley?
Maybe it's a wonky belt or alternator bearing.
If it's on the motor and RPM related, you ought to be
able to reproduce it sitting still with the bonnet up.
Do you have a timing light?
Find a darker area (or wait 'till evening), check out
what's happening with the belts/pulleys, esp the wp,
illuminated by the TL.
I've been amazed how much belt whip you see on some
cars, observed this way.
Carter
--- Paul Tegler <ptegler@cablespeed.com> wrote:
> Concerning my 'strange womp-womp
> vibration I just went out for a test drive
> without the tunnel in place on the Spitfire.
> I Still couldn't tell where the vib or
> womp-womp-womp comes from.
>
> It seems to be at a sub-multiple of the
> engine rpm and more noticeable at
> around 2500-3500 rpm.
>
> I was able to take it out of gear and drift
> at about 40mph down a long gentle hill
> . No womp-womp.
> I put it back in gear...back to around 3krpm
> and I can feel/hear it.
>
> Wit ha hand on the tranny it didn't feel like the
> same sound I was hearing.
>
> Now here we go.... Would anyone believe it
> could be a water pump? I just wiggled
> the pulley and I can feel ever so slightly a
> axial side play in it
>
> Any thoughts? Anybody?
>
>
> Paul Tegler ptegler@cablespeed.com
> www.teglerizer.com
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