Damping oscillating boost gauge needle???

[Carl Summers]

Put an orifice(.040-.060") in the vacuum/boost line about 12" from the
guage.  It will dampen the pulses. It will also make the gueage react a
little slower but shouldn't be a prob.
-Carl

-----Original Message-----
From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Brian Renegar
Sent: Tuesday, May 08, 2001 3:15 PM
To: diy_efi at diy-efi.org
Subject: Re: Damping oscillating boost gauge needle???


>I use a make of boost gauge that works fine in 90% of installations but
>occasionally the needle will sense intake pulses and go haywire,
>oscillating about and buzzing. Any ideas for a cheap and simple in hose
>damper to put between manifold and gauge? Thanks.

You might try just increasing the length of tubing from the gauge to the
intake.  The extra air in the tube should help dampen any pressure pulses.

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