Someone take a drive and tell me what you get for vacuum levels according to your boost gauge.

Mine seems to be all over the place and is really inconsistent.

Just want to know idle vacuum, cruising speed vacuum, and any others you want to document :)

Thanks!

I have mastered (J/K)the vacuum system since I have been through every line in my car. My vac at idle is 17-18 in/hg and crusing off boost is about 10 in/hg. When I kinda get on it and then sharply take my foot off the gas, it goes to 21-22 in/hg. Get a real Vac gauge. It was worth every penny.

Use a silicone hose for your boost/vacuum line. My bet is you have a small leak in the hose or it is not connected securely to the back of the guage.

vacumm is going to differ with the trottle position. unless you want someone to go out and run a graph on throttle % and vacumm readings then, its all gonna be different.

Are your rpm's going up at idle? that would be a leak. I have the crane #14 turbo cams and my vac at 1k rpm is about 18 hg.