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boost needle "flicking".... is this normal?

moo_r32

By moo_r32,
in General Automotive Discussion

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Craved Grand Master

Craved

Posted
Posted

dont think it would be anything to do with the BOV, since you would be getting your reading from the plenum, and the BOV is on the other side of the throttle body! does it stay up there or just go up then drop off to vacuum?

knore Grand Master

knore

Posted
Posted

If you have a bleed valve then this is pretty common,

does it happen when you floor it ? like your on max boost for a few seconds then it goes PSSSHSHH up to 17psi or whatever

cos realistically it cant go up to 17psi, stock turbos can only push a max of about 14

moo_r32 Proficient

moo_r32

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yes craved it does, it kinda feels like as soon as i come off throttle there is a micro second where the boost biulds up thes ptchhhhhhh its back down to 0, could it be something to do with the waste gate or sumptn, im going backpacking for a month so she will be resting for a while and getting dyno tuned when i return.

is 11-12psi stock boost?

Craved Grand Master

Craved

Posted
Posted

fair enough, didn't realise that! i stand corrected Elithrar! so that would suggest that maybe just the exhaust etc is putting it up more with better flow! still doesn't explain a boost increase on engine side of the throttle body.

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