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I installed a ghetto boost gauge into my audi a4 TDI…
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Wrong gauge for application, diesels boost more than petrols so your gauge doesn’t read high enough, you’re probably tuned to 28psi then add in boost spike you’re off the chart, there’s no vac on a tdi you wanted a gauge that reads just 0-40psi and put a small in line fuel filter in anywhere between the vac pipe and it’ll act as buffer so the needle doesn’t twitch.
Long time no see son
It's normal for the gauge to spike when you slam the throttle, its a diesel vnt turbo so the vnt closes when you boot it which usually makes it overshoot when mapped but it comes back, 100% normal, also mapped pd170s run about 1.6bar of boost which makes 23psi bang on 🙂
I like your videos.
Did you thought about using VCDS or Obd elven to log the expected and actual boost values while driving?
This should give you a better idea on what is going on.
how come your vids have dropped ? mean your not bring them out as much as used too ???
What is the maximum this gauge can reed,
Dave
So yes you have now found that you are overboosting, now work out if it is the vnt sticking or the control, can you fit a camera were the turbo vnt leaver is so you can see if it is moving, if the vnt vaines are stuck, you will not see the leaver move, if stuck, it is time for Mr mussel, look on YouTube how to do it,
Good luck.
Dave
Yeah stock brd dude boost too about 21psi man, map probably has is slightly more. And the torsion value is more so to slightly adjust where the power band is close or on zero under load is kind of optimum for fuel efficency also. Can be done yourself by adjusting the exhaust cam.
Great that you have now fitted one,
Dave
what wind deflectors are these? do they do the job?
I love the A4 videos❤