Pd150 psi

[Abbz86]

After fixing all boost leaks ive fitted a boost gauge
What should it be boosting at standard my dials going up to 25ish PSI
Is this about right
Bog standard pd150 running darkside developments hard pipe kit and egr delete

 

[dukemaster17]

If it is stock then you should read arround 8PSI = 0.6Bar of boost.

 

[Abbz86]

So im guessing the gauge is crap
If not what can cause such hi boost
It doesnt feel like its stupid hi car feels normal

 

[dukemaster17]

How much PSI do you see on your gauge ? Do you have any other mods ? And is your engine 1.9TDI ?

 

[sockpuppet]

I get a peak of 24 when using torque on a TDI 150, so sounds about right to me.

 

[dukemaster17]

You mean you read 24 PSI when connecting the Torgue OBD2 via bluetooth to your phone and you see 24PSI when boosting ?
If that's the case then i should inform you that the Torgue app propably reads about 14,7 PSI higher that your boost gauge. This is because of the ambient pressure at the sea level (14,7 PSI).
Is your boost gauge mechanical or electronic ?
Your torgue app gets it's information from the OBDII port which comes from the computer of the car.
This is showing you the requested boost pressure and your boost gauge is showing you the actual boost pressure.
You have to adjust the Torgue app.
So if your car is not mapped as you informed then you should read 24 - 14.7 = 9 PSI of boost normal for your car.

 

[Dan FR]

This is a diesel mate, youre referring to petrol boost levels. Standard PD150 boosts at around 1.4-5 bar.... a little more as a temporary spike is normal. Should not be seeing close to 2 bar though

 

[dukemaster17]

This is a diesel mate, youre referring to petrol boost levels. Standard PD150 boosts at around 1.4-5 bar.... a little more as a temporary spike is normal. Should not be seeing close to 2 bar though

I feel a little embarrassed.
In my mind i had a petrol engine when explaining that and apparently i was happy with that and remained with that scenario.

Sry Abbz86 and thanx Dan FR for reminding me that. Still 2 Bar of boost is a lot.

 

[Dan FR]

25 psi mentioned which is about right, should drop a few psi after the initial spike. As long as the spike doesnt near 30psi then youre ok

 

[cleverspoon]

I believe a spike at around 24psi then settle at around 19psi.

 

[Dan FR]

They're not mapped to have a spike, it happens due to slow responding VNT. Now that i have my laptop on i can look at a standard map:

Standard map requests 1.4 bar at 2000 rpm, rising to 1.5 bar at 2500 rpm, holding that request until 3750rpm where it will start to tail off to 1.1 bar by 4700rpm. So anything more than 22psi is a spike/overboost