High Elevation Vacuum Reading HELP!

[Rock2610d]

So, my new engine has about 4 hours on it. Just hooked up a boost/Vac gauge and was a little surprised. (1995 Eagle Talon AWD Almost Stock setup)

After warming up I had spot on 13 in hg(Vacuum), at 768 or so rpm according to my OBD tester. It does not vary at all.....but I thought that was kinda low. So I start looking for issues. Found none then thoughtI live at 7800 feet of altitude.

Found this Article in:
Motor Magazine
Reading a Vacuum Gauge
by Ken Layne
August 2001. Mastering the Basics

http://www.atlanticz.ca/zclub/techtips/vacuum/

Inches of Altitude Vacuum
Sea level-1000 ft. 18-22
1000-2000 ft. 17-21
2000-3000 ft. 16-20
3000-4000 ft. 15-19
4000-5000 ft. 14-18
5000-6000 ft. 13-17

So, do you all think its safe to say a steady 13 in Hg is good for 7800 ft?
If I extrapolate:
6000 ft to 7000 ft would be 12 -16
7000 ft to 8000 ft would be 11 -15

A reading of 13 is right in the ball park, right? I should not be killing myself looking for leaks, bad valve timing, etc ?

Car is "almost" completely stock. I do have 9:1 pistons .....due to elevation, eagle rods, and MLS HG. Everything else is stock....even the crappy BOV and Re-maned T-25 which only puts out 8 PSI of boost...MAX.

 

[WES_393]

Yes, 13 inHg sounds pretty normal for stock cams at higher elevation.

Here at 6,000ft with stock cams my gauge would read ~15 at idle. My Omni Power MAP (corrected for altitude) reads about 9 inHg with 272 cams.

 

[Rock2610d]

Thanks....that is a relief. I just need to figure out my low boost issue now....