ok i got a boost gauge a while ago and i figured i could put it on about any line goin into the intake manifold.. so i put my boost controller t-valve thing on one of the vacuum lines that come from the intercooler.. but it reads me like 13-16 vacuum ..it shows boost right but the vacuum is weird... i was just wondering if u could post where u put ur boost gauge in and what ur readings are..pics would help

 

13-16" is more or less normal at idle for an older engine.

 

Just curious, whats good on a rebuilt engine, say right after break-in?

-Ben

 

You MUST install a VACUUM gauge AFTER the throttle plates (on the engine side). I'm ignorant on where to place a boost gauge, seems it'd work well there too.

 

20" to 18" for stock ports
18" to 16" for mild street port
16" to 14" for aggressive street port
14" to 10" for bridge port


-Ted

 

thanks, I should be hoping for roughly 16

 

i just hooked my boost gauge to the pressure sender on the pass side of the car. works fine. i get 18"-20" even with a high-mileage S4 engine. currently at ~103,xxx.

 

i got 18 on my street port.

 

well im getting like 13-16 on stock ports.. so can u guys post likea pic or something showin where urs is??

 

How old is your engine?

T it off one of the nipples on the plenum.

 

I get about 18-19 with my Jspec, I guess I got a low milage one.

 

its 88 wit 60k miles...plenum? can u describe that?

 

I get about 14 on the vacuum....My motor is ported rather, big.

 

any others?

 

You can tap it in the vacume for the Pressure sensor, or your vacume that goes to your Blow off valve.

 

17" on rebuilt stock port with about 50,000 miles

 

14" streetported 6,000 miles

 

12-13" super streetported 700 miles

 

15-16" streetported about 3,000 miles

 

15" on stock port

 

You don't want to tap it off the pressure sensor, there is a little black insert in one end of the line, you don't want to mess with the pressure that sends/reads from that.

 

I see about 20vac on my jspec motor. Think its 20, ****, been 2 months since I drove her really so cannot remember now...lol

 

How would I convert my vacuum pressure from my Greddy guage(boost is in bar readings, can't remember what the pressure is in..)

 

errm ok, so WHERE is the Proper spot to tap for boost reading. I didn't realize having it tapped at the pressure sender was a bad idea.

not to jack the thread...

 

How many PSI in one BAR?