boost gauge part 2...

[jim rose]

hey all,

thanks a go-zillion to all who helped with my first round of questions about 
my boost gauge install. my gauge readings were very much inline with 
everyone i spoke to (at similar altitudes, anyway :) which is rougly -12/14 
"vac @ idle (sea level) and about 6/7 psi at full boost. the digital gauge 
reads 1.2 as a max, though we all know theyre neither fast nor accurate.

However, one odd condition has arisen that befuddles me: in 4th gear (ONLY) 
and under full throttle, i can get the vdo needle to swing right past 7 psi 
up to about 15 psi or more. i notice, when this happens, a sort of 
hesitation or "flat spot" in the surge of boost. i also notice the vdo 
needle "flutters" erratically. my buttdyno feels that my car is NOT making 
15 psi of boost. no metal parts have shot off "yet".

if i let off the gas, and get on it again, the gauge will "correct" itself 
and come back to 7/8 psi. It reads and also feels a little more boosty in 
4th gear. the digital gauge never reads past 1.2 bar.

broken gauge or overboost condition? as i said, i COULD NOT reproduce this 
in any gear other than 4th. in 4th it's pretty common. any (more) 
thoughts/impressions/opinions/experiences appreciated.

thanx boys n girls...

jim
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