G
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Looking for some guidance here, have installed a boost gauge and it is reading vacuum the majority of the time, even under boost. I'll be honest my experience is limited but this doesn't seem right. Car is currently running stock boost. So a bit more info on approx gauge readings:
Ignition Off: zero
Idle: -20 inHg
Driving Off Boost: -10 inHg
Normal driving (changes at 4000 - 5000 rpm ie under boost): up to zero or 1 psi
Hard accelaration in higher gear (peak boost): 7-8psi
Gauge is an Autometer and in gwc (confirmed by previous owner). I have had another gauge previously installed that showed similar readings, though it was the gauge at fault.
Line is plumbed in to line at front of plenum, teed off between plenum and FPR as recommended in other posts http://i98.photobucket.com/albums/l275/ussapper_00/absolute_plenum_pressure_line.jpg
I have also tried teeing off from line to rear of plenum http://ozvr4.com/forums/attachment.php?attachmentid=3325&d=1247046890 as others have recommended with the same results.
Stock BOV has been replaced with Sard R2D2 and whilst holding boost a lot better has made little other difference to gauge reading behaviour. It does however make it easy to tell when boost has built up!
Car appears to be behaving normally and goes well enough, but the fact that two different gauges each plumbed in two different locations are showing the same readings is concerning me that something is wrong? Have checked all hoses etc for leaks and nothing is apparent.
Any ideas greatly appreciated....
Ignition Off: zero
Idle: -20 inHg
Driving Off Boost: -10 inHg
Normal driving (changes at 4000 - 5000 rpm ie under boost): up to zero or 1 psi
Hard accelaration in higher gear (peak boost): 7-8psi
Gauge is an Autometer and in gwc (confirmed by previous owner). I have had another gauge previously installed that showed similar readings, though it was the gauge at fault.
Line is plumbed in to line at front of plenum, teed off between plenum and FPR as recommended in other posts http://i98.photobucket.com/albums/l275/ussapper_00/absolute_plenum_pressure_line.jpg
I have also tried teeing off from line to rear of plenum http://ozvr4.com/forums/attachment.php?attachmentid=3325&d=1247046890 as others have recommended with the same results.
Stock BOV has been replaced with Sard R2D2 and whilst holding boost a lot better has made little other difference to gauge reading behaviour. It does however make it easy to tell when boost has built up!
Car appears to be behaving normally and goes well enough, but the fact that two different gauges each plumbed in two different locations are showing the same readings is concerning me that something is wrong? Have checked all hoses etc for leaks and nothing is apparent.
Any ideas greatly appreciated....