i installed one in my 86t today and it just kinda bugged me that it only shows boost at wot because i can just be crusing and can hear the turbo start spooling but the gauge still shows vaccume unless i open the throttel all the way kinda gay but o well
If the boost gauge is out of adjustment it would not pick up the lower boost level, but when you nailed it the higher boost would cause a reaction , actually showing less boost then your really producing, On my 82 theres a boost adjustment above the glovebox, turn key to on and adjust it to top middle of gauge, if you turn the key to on and it reads on the left side of top middle then you would not see boost at lower boost levels.
so if i was just crusing at 4000 in 2nd and it is not sowing boost do i have it hooked up wrong do i need to pick a diff vaccume sorce or is that just how this pitcular gauge works? seeing as its not $9876549869 autometer
also at idel im showing about 29 30 of vaccume isnt that a touch high? what dose this mean?
yea that is a lot of vacume and at 4000 in 2nd sould be arond 6/7, there is a good boost line that gos all the way acrossed the motor form the top left of the plentum to right under the coil for the ingnition.
a few corrections - you can modulate the boost via the throttle, behind the throttle plate the boost is much higher then after in the plenum where the boost gauge signal is from. If you notice when you boost WOT after modulating boost via the throttle it is almost insantaneous. This is becuase there is basically full boost before the throttle plate. In the stock setup the wastegate is controlled before the throttle body.