Boost Vs. Boost/Vacuum Gauge
 

i know it is stupid, but why would you want the vacuum half of a boost vacuum gauge? did a search and couldn't find anything. thanks

diagnostic tool.

well, if you have a blown engine, your car wont have good vacuum. that way you know!!

This is the wierdest poll I've seen yet. The gauge monintors charge and vacuum. The gauge is simply reading two parameters. The vacuum shows you the health of a engine (compression). It is helpfull for anyone looking a boost controll, spool rate and compression. Although, reading vacuum is error prone in accessing compression.

I don't think you can buy a boost gauge that doesn't read vacuum unless it is really cheap, it would be worthless.

Buy it with vacuum.

got ya, that is what i thought i just wanted to double check.