Make a restrictor out of a piece of brass with about a .020" hole in it and put it into one of the fittings between the engine and the gauge. It will dampen out the oscillations very well.
Jerry

Last edited by Hotrod Lincoln; 11/02/2010 4:22 AM.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!