vacuume at idle

[3.0 GT]

how much vacuume should the boost gauge show for a turbo 7m at idle?

 

[grimreaper]

most healthy cars are in the 18-21 in/hg^2 cams will lower that vac at idle and many other things as well.

good read http://www.cygnusx1.net/Supra/TechTips/vacuum_gauge_readings.aspx

 

[JDMMA70]

im getting -21mmHg (i guess thats the same as what according to the cygnus page) at idle it seems the norm for most supras ive seen

 

[3.0 GT]

im getting -21mmHg (i guess thats the same as what according to the cygnus page) at idle it seems the norm for most supras ive seen

Ok. I was justwondering because my boost gauage is all the way down until boost kicks in and I didn't know what it was supposed to be at.

 

[grimreaper]

stock gauge?

 

[3.0 GT]

stock gauge?

Yep

 

[Rennat]

mines -19 on an aftermarket gauge... my stock gauge just stays pegged at the bottom.

 

[mk3tattoos]

stock gauge is not very good. you should get yourself an autometer gauge, or any aftermarket gauge. But don't get anything less that an autometer.

 

[shiftysupra]

my tru-boost is usually in the range of -17 ~ -19 under vacuum

 

[shaeff]

My car was pulling 23 in/hg^2 when it was on the road. The stock gauge is fairly accurate, albeit, very slow.

If you've increased boost, get an aftermarket gauge.

 

[mkiii222]

18-21 at idle. Stock gauge will stay pegged on low until after boost has set in.