boost question - standard gauge

[GDA]

Just upgraded to a turbo from a lux, and enjoying it in the sunshine.

It has a promax boost enhancer already fitted, and feels very strong.

I am seeing 1.8 bar on the standard dash boost gauge - I hope that means 0.8 bar turbo pressure? Its certainly holding that pressure (or near it) for a full throttle run through the gears (up to 70 m'lud)

If it is running 1.8 bar, is it the boost enhancer causing it to run so high?

Gareth

 

[Lemon]

It will be .8 bar or I believe .75 is factory setting out of the box.

 

[GDA]

So everybodies gauge shows 1.8 bar - ie all the way to the right?

G

 

[Lemon]

Yes

 

[appletonn]

What he said[]

 

[poprock]

Isn't it something to do with the standard boost gauge reading atmospheric pressure plus your boost pressure? So a reading of 1.8 is actually 0.8, or 0.8 above atmospheric?

I'm not sure on it, but am sure I've read something along those lines.

 

[appletonn]

That's correct. If you look at the standard gauge, it runs from -1bar through 0 over to +1 bar of positive pressure, ie boost.

Whenever the needle is below the 0 mark, the engine is creating vacuum, as opposed to positive boost pressure.

 

[AndrewS]

ORIGINAL: GDA

Just upgraded to a turbo from a lux, and enjoying it in the sunshine.

It has a promax boost enhancer already fitted, and feels very strong.

I am seeing 1.8 bar on the standard dash boost gauge - I hope that means 0.8 bar turbo pressure? Its certainly holding that pressure (or near it) for a full throttle run through the gears (up to 70 m'lud)

If it is running 1.8 bar, is it the boost enhancer causing it to run so high?

Gareth

Hi Gareth,

As has been confirmed by others, the boost pressure shown by the in car gauge is 0.8 bar above 1 atmosphere (hence 1.8 bar).

The Boost Enhancer interupts the air signal from the turbo outlet (the take off is on the intercooler entry pipe) until the BE's spring pressure is overcome by air pressure when it too opens. This has the effect of allowing the wastegate to remain closed for longer allowing the boost to build a little higher for a slightly longer period.

So, rest assured that all looks well with your car and you can continue to safely enjoy the slightly enhanced performance over standard.[]

Regards,
Andrew

 

[poprock]

Just out of interest Andrew, I've been looking at the wee boost enhancer on your website. My adjustable wastegate had a small restricting collar inserted, which has recently been removed. Would that have been having a similar effect, to some reduced degree?

 

[Gordon Attar]

I'm gettin an extra boost to 1 bar plus a few seconds up to 1.4 bar on my seperate gauge. The resident in car system is reacting a bit slower and never gets over 0.8, so sound like everything is a ok.