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View Full Version : boost/vac guage

colinnicholson86
02-17-2003, 07:27 PM
on a carbed car which vaccum line can i hook up a boost/vac gauge?
A20A1
02-17-2003, 10:30 PM
It taps into manifold vacuum... did you remove the vacuum lines from around the carb?
colinnicholson86
02-18-2003, 02:46 PM
no i havent removed the vac lines. I live in nz and already dont have emissions gear. should i still remove vac lines? at the moment i have got a vac gauge hooked up to the air bleed line but i dont think that there is pressure there as well as vac. if i put a boost/vac straight on to the manifold will i see vac and pressure?
A20A1
02-18-2003, 08:23 PM
If you see pressure in a stock intake non-turboed motor, that means you are getting reversion which is bad.

you should only see vacuum thats it.
around 20" HG at idle and 0" at wide open throttle.