Understanding Boost Gauge readings?

**Monkey77** · 03-26-2008 10:53 PM

Just installed the AWE boost gauge. Wanted to know how to properly understand the readout the gauge gives me, and what is normal operating boost/vacuum readouts.

thanks

**A4TUNE** · 03-26-2008 11:34 PM

which boost hose did you splice the "T connector" into? got a pic? (jw as i'm about to do the install)

**7speed** · 03-27-2008 12:15 AM

I put mine on the hose coming off of the intake manifold.

**notochord** · 03-27-2008 12:20 AM

http://www.podi.ca/Installation.aspx#part1

the way ii understand it is that, when you hit the gas and the needle jumps up thats how much psi the turbo is putting out. I dont understand the vacuum part tho....

**A4TUNE** · 03-27-2008 12:24 AM

Originally Posted by 7speed

I put mine on the hose coming off of the intake manifold.

thats where i was going to put it but i figured there was a closer hose to the firewall?

**mike-2ptzero** · 03-27-2008 11:41 AM

Originally Posted by notochord

http://www.podi.ca/Installation.aspx#part1

the way ii understand it is that, when you hit the gas and the needle jumps up thats how much psi the turbo is putting out. I dont understand the vacuum part tho....

When the throttle body closes the gauge reads how much vacuum the engine is producing as it sucks the air out of the intake manifold. Engines with higher compression will produce more vacuum, if you have a vac leak you will notice the vac readings to be come lower.

As the TB opens the pressure evens out since more air is allowed into the IM and once the turbo is producing enough boost to over come the vacuum and atmos pressure the gauge then reads zero, after that point the gauge then reads "boost".