Is 10 lbs of vacuum too low?

[flattype]

When first fired up & running in idle, about 1K RPM or so, seems to hold about 18"-19" pretty steady, and when almost warmed up and idling about 750 to 800 RPM or so pulls about 17"-18" vacuum. I will take a closer look Sat morn. Cammed cars generally hold a little less vacuum.

Im running a 208/201 cam and only have 12" at idle in park and 10" in drive. Around where should I be? (the car is running great and I cant find any vacuum leaks)

 

[Rodney87GN]

FWIW, I have 14" at idle (hot), 16" in park. This is with a 210/205 flat cam.

 

[baller760]

I have about 15-16 in park and around 15 when driving and my foot is off the gas. When I come to a stop it'll go from 16 to 11 and back to around 14-15. Maybe I have a small cam that the previous owner never told me about

 

[Gary Wells]

Considering that most of us, if not all, other than myself are relying on a non-calibrated/non-certified vacuum or vacuum/boost gage. The important thing is that your car performs the way that you think that it should, doesn't die in the middle of a long traffic stop, Etc. Unless people comparing this type of data have gages that are all reading the same at the same pressure/vacuum settings, these figures are not necessarily meaningless, but are not the end of the world figures either.

 

[Gary Wells]

Ok, this morning had it out, and:
At start up, fast idle, about 1050 rpm or so on the factory tac, about 20"-20.5" maybe vacuum at idle, in park.
After about 30 secs or so, about 1000 rpm on factory tac, about 19"-20" vacuum still at idle, in park.
After 1 min or so, about 850 rpm or so on factory tac, about 18'-19" vacuus at idle, in park.
After 1 min or so, about 8oo rpm or so on factory tac and in reverse gear and idling just enough to not move the car, about 18" vacuum
Same as above, in reverse gear, & foot on brake, idling about 800 or so on factory tac, about 17.5"-18.0" vacuum.
Fwiw: this is an original 19k mile car.

Noticably less than this and, high mileage motor?, bumpstick affecting vacuum?, or vacuum/boost leak issues.

 

[Gary Wells]

Ok, this morning had it out, and:
At start up, fast idle, about 1050 rpm or so on the factory tac, about 20"-20.5" maybe vacuum at idle, in park.
After about 30 secs or so, about 1000 rpm on factory tac, about 19"-20" vacuum still at idle, in park.
After 1 min or so, about 850 rpm or so on factory tac, about 18'-19" vacuus at idle, in park.
After 1 min or so, about 8oo rpm or so on factory tac and in reverse gear and idling just enough to not move the car, about 18" vacuum
Same as above, in reverse gear, & foot on brake, idling about 800 or so on factory tac, about 17.5"-18.0" vacuum.
Noticably less than this and, high mileage motor?, bumpstick affecting vacuum?, or vacuum/boost leak issues.

 

[Gary Wells]

Ok, this morning had it out, and:
At start up, fast idle, about 1050 rpm or so on the factory tac, about 20"-20.5" maybe vacuum at idle, in park.
After about 30 secs or so, about 1000 rpm on factory tac, about 19"-20" vacuum still at idle, in park.
After 1 min or so, about 850 rpm or so on factory tac, about 18'-19" vacuus at idle, in park.
After 1 min or so, about 8oo rpm or so on factory tac and in reverse gear and idling just enough to not move the car, about 18" vacuum
Same as above, in reverse gear, & foot on brake, idling about 800 or so on factory tac, about 17.5"-18.0" vacuum.
Noticably less than this and, high mileage motor?, bumpstick affecting vacuum?, or vacuum/boost leak issues.