boost/vaccum question!

[A80Avant]

Hello

as you may have read,i recently bought the boost guage flex had in his car.This one indicating in bar starts from -0.5bar(vaccum) and goes all up to 2.5bar(boost).

My autometer gauge i use now has numbering that go much less than 0.5 in vaccum.(goes up to -30psi which is -2bar).Now that i fitted the new turbo and use the samco hoses,i get readings of -20psi when i roll the car without pressing the gas,which means i have indications of up to -1.5bar.

Since i want to fit the new gauge from flexx,which only shows -0.5bar of vaccum,is there going to be any problems with that?Is there any risc of damaging the boost gauge?If not since i wont be able to see the true depths of vaccum is that bad for noticing potential losses in air flow?( i know that before the changes the vaccum indicator only went as far as -10psi which is -0.5bar roughly.

Would you make this change of bouust gauge if you knew that for the better looks,you would lose a potential vital information of the vaccum/boost indications?

thanks
Vasilis

[4WheelDrifter]

Only 1 bar of vacuum is possible.

[A80Avant]

well,my indication is -20psi.Either the gauge is wrongly written or im getting more than possible! ??? !!! what could this mean??

[dkw_dude]

well,my indication is -20psi.Either the gauge is wrongly written or im getting more than possible! ??? !!! what could this mean??

I think in the US of A they sometimes measure in inches Hg (Mercury), and that 30 inches of Hg is approx. 1Bar. Found something here:

http://www.convert-me.com/en/convert/pressure

There's quite a lot of different units for measuring pressure.

[A80Avant]

ohh i see.yes you are right...i think it is in mmHG so it must be 1bar.
well i noticed that the boostgauge i bought that has the bar figures only,has the ability to go below .5 bar it just doesnt have the number indication.so i guess it is nothing to worry about
cheers
Vasilis