boost gauge help

[[ sam ]]

Hi all my boost gauge has been fitted when stationary it reads minus 30 psi
Is that normal everything I have read so far suggest it should be minus 20 psi is this bad?

 

[desertstorm]

Normal atmospheric pressure is + 14.7 psi in relation to a vacuum at 0 psi. You can't have -20 psi if you are measuring from normal ambient pressure. On my boost gauge idle is around -0.65 to -0.7 bar so that around -9.5 to -10.3 Psi .

 

[[ sam ]]

ok well it is minus 30 hg so minus 14.73 psi

 

[desertstorm]

Where have you connected the pick up point for the gauge?.

 

[[ sam ]]

I T off the fpr I think thats what you mean why ?

 

[AmanDosangh]

I T off the fpr I think thats what you mean why ?

I would change that, and have it off the dv line instead. You get a leak from your connection to the fpr and will mess with your fuelling


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[[ sam ]]

ok will do that today thanks but the question still remains is minus 30 hg normal?