installed boost gauge but... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TheSparo · 10-12-2003, 02:04 PM

ok there is only one line running vacuum, and when i have it hooked up, its usually on 20psi vacuum, it only goes into boost when im on the gas, if im barely on the gas its still in vacuum, it goes up to like 11psi too when i gas it all the way...is this normal for a boost gauge, i would have thought that as long as the turbo is spooled up it would show boost...?

Titan · 10-12-2003, 02:12 PM

Yes, this is normal. The turbo won't produce boost unless there is load applied.

You have your vacuum line T-ed off at the the TB right? Well, when you let off the gas, the throttle plate closes, creating a vaccum through the intake manifold. This causes your gauge to display vaccum.

srJOEYdet · 10-12-2003, 07:11 PM

Mine does that.

Joey

TheSparo · 10-12-2003, 07:58 PM

thank ya much all

10-12-2003, 02:04 PM	#1
TheSparo Zilvia FREAK! Join Date: Sep 2002 Location: Athens/Chattanooga/ Cookeville/Morristown, TN Age: 39 Posts: 1,141 Trader Rating: (0) Feedback Score: 0 reviews	installed boost gauge but... ok there is only one line running vacuum, and when i have it hooked up, its usually on 20psi vacuum, it only goes into boost when im on the gas, if im barely on the gas its still in vacuum, it goes up to like 11psi too when i gas it all the way...is this normal for a boost gauge, i would have thought that as long as the turbo is spooled up it would show boost...? __________________ 89 240 SR powered... ummm i promise its stock

10-12-2003, 02:12 PM	#2
Titan Zilvia Junkie Join Date: Apr 2002 Location: Ontario, Canada Posts: 421 Trader Rating: (0) Feedback Score: 0 reviews	Yes, this is normal. The turbo won't produce boost unless there is load applied. You have your vacuum line T-ed off at the the TB right? Well, when you let off the gas, the throttle plate closes, creating a vaccum through the intake manifold. This causes your gauge to display vaccum. __________________ Sleep Doesn't Drink Beer

10-12-2003, 07:11 PM	#3
srJOEYdet Zilvia Member Join Date: May 2002 Location: Portland, Oregon Age: 39 Posts: 260 Trader Rating: (0) Feedback Score: 0 reviews	Mine does that. Joey __________________ Exceed 400x200 size limit

10-12-2003, 07:58 PM	#4
TheSparo Zilvia FREAK! Join Date: Sep 2002 Location: Athens/Chattanooga/ Cookeville/Morristown, TN Age: 39 Posts: 1,141 Trader Rating: (0) Feedback Score: 0 reviews	thank ya much all __________________ 89 240 SR powered... ummm i promise its stock