boosting problem? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

driftn_silvia · 06-12-2006, 11:51 PM

Just did a sr motor swap...and i got it running its good...i just installed a boost gauge to one of the vaccum lines...and its reading only 4.5 psi when its full throttle. is it possible that the internal wastegate is set. Also where does the wastegate hose go connected to? could that be the problem that is not boosting right?....help please.

thanx

S13Eye · 06-13-2006, 12:07 AM

The wastegate actuator hose needs to see pre-throttle-body charge pressure. On a stock SR, i would go off the cold pipe. If you don't have a sidemount, i would go off the port on the bottom of the throttle body.

You should be seeing more than 4.5 psi. Is your exhaust restricted in any way? Also make sure your boost gauge isn't leaking.

06-12-2006, 11:51 PM	#1
driftn_silvia Zilvia Junkie Join Date: Jul 2005 Location: ventura Posts: 560 Trader Rating: (7) Feedback Score: 7 reviews	boosting problem? Just did a sr motor swap...and i got it running its good...i just installed a boost gauge to one of the vaccum lines...and its reading only 4.5 psi when its full throttle. is it possible that the internal wastegate is set. Also where does the wastegate hose go connected to? could that be the problem that is not boosting right?....help please. thanx

06-13-2006, 12:07 AM	#2
S13Eye Zilvia Member Join Date: Feb 2006 Location: Los Angeles Age: 40 Posts: 190 Trader Rating: (0) Feedback Score: 0 reviews	The wastegate actuator hose needs to see pre-throttle-body charge pressure. On a stock SR, i would go off the cold pipe. If you don't have a sidemount, i would go off the port on the bottom of the throttle body. You should be seeing more than 4.5 psi. Is your exhaust restricted in any way? Also make sure your boost gauge isn't leaking.