Idling - Whats your boost gauge read.

[EHeye]

Well I checked with my local DSM club and most everyone reads at about 20 into vac or maybe even 15 into vac.

My question is, im at 3 into vac at 750rpm idle.

Anyone know which is right?

 

[out there]

i just installed my boost gauge, and it reads 0... while i'm accelerating in 2nd (just going aroudn the 'hood, never went above 2nd) it does dip to around 10, and boost is accurate. while i'm decellerating, it jumps back to 0! ????

 

[gst25401]

mine is 29

 

[SpoolinTalon2]

mines at 15 at idle and 20 on decceleration.

 

[IslanderTsi]

19-20 idle around 25-26 on decel.

 

[riceviper]

an reading 20 at idle and 26 on decel

 

[devioustsi]

21inhg at idle and 28inhg on decel, stock cams, bottom end and valve train.

 

[AWD_Launch]

15 idle, 20 decel, but my gauge is a little off, it reads 1PSI when the car is off I need to get that fixed

 

[kelvinb]

-22 - -25 idling, drops to -30 on decel

 

[mrbrianf20]

21-23 make sure that the nuts that screw the boost gauge together are really tight. i took mine off and then put it back on and it went from reading 12psi to reading 10. so i have to tighten it more. i would suggest you do the same. if that doesnt work then you have some major boost leaks

 

[iiiwildfireiii]

15 inHG on idle, 20-ish inHG on decel.

 

[chanley talon]

Ive ran into this on my shelby charger! What kind of gauge are you using? It is possible to have the timing off and see this . You say you get good vac when you decelerate but not at idle? Let me guess are you using the boost gauge from j.c. whitney. It seem to have that problem. If not it could have crimp in the line somewhere. Lets us know if you figure it out. Good question!

 

[Wicked96GS-T]

-21.7 in/Hg at idle according to DSMLink .

 

[Liquidus]

When you turn the car off, does it go to 0 ? If not, then you have calibration issues with your boost gauge.

18 vac for me while on idle.

 

[awd93talon]

where do you have the boost gauge tapped into?

 

[travislaw]

where do you have the boost gauge tapped into?

The intake manifold line going into my AFPR or your stock Fuel Pressure Regulator if you have one.

 

[zippyshoe]

19 in. Hg at idle, 25-27 in. Hg when decelerating.

 

[diablos991]

My greddy Profec B-Spec 2 reads ~-50 at idle and -99 on decel. does that mean that I am at -5psi vac?

 

[toecutter]

Im at about 15 at idle, about 20 when decelerating.