ive had a profect e-o1 for awhile now, and i notice the car idles around -7.0 psi as monitored by the e-o1. i thought, and i noticed from my previous cars that a turbocharged car should idle around - 14 to -17 psi. my boost gauge reads around 380 kpa? i think,( i dont remember if vacuum for the hks gauge is kpa or mmhg). what is normal idle vaccum? i dont have any vacuum leaks, is the e-01 wrong? when i deccelerate in gear it will drop to -10.7 psi or so. again, i though under deceleration it should be around -20 psi. some feedback would be nice. thanks,

 

No, its fine. You're thinking of inches of mercury. Idle should be 16-18 inches, and on decel about 20 inches for a little bit. What your e-01 reads is the right readings in psi.

 

It will always vary depending on the engine and mods. If you add cams for instence you lose vacuum. hence the stalling issue.

Chris