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

s13silady · 04-10-2003, 11:24 AM

ok... i just found out the wastegate that i had gotten was a .3 bar.... that means 4.5 psi correct??
and if i dont have a manual boost controller then i will only be pushing 4.5 psi...
but if i did can i push more?
or will i have to change the spring?

Tyler Durdan · 04-10-2003, 11:42 AM

Yeah, you will be set at 4.35psi with a .3 bar spring (14.5 *.3 = 4.35). If you want to push more boost, you can pick up a boost controller (manuel ones for like $60.00), or just buy another spring with a higher boost rating. I would suggest buying another spring because it's cheaper and will prevent boost spikes a lot better than boost controllers (at least the manuel ones).

turbo240sx · 04-10-2003, 11:50 AM

YOU CAN ONLY INCREAE BOOST TO A POINT. THE SPRING WILL START CAUSING BOOST SPIKES CUZ OF ITS LOW SETTING TO BEGIN WITH. BETTER OFF GETTING A HIGER RATED SPRING. IF YOU WANNA GO OVER 10 PSI GET A STIFFER SPRING.

d240t2 · 04-10-2003, 12:53 PM

I've run 15psi on my .3bar Tial wastegate spring no problem for a long time. I don't see how it matters...since the boost controller applies boost pressure to the top of the wastegate to assist its closing. I mean, it isn't like the spring has to do any additional work...the boost on top of the wastegate does.

Dennis

04-10-2003, 11:24 AM	#1
s13silady Nissanaholic! Join Date: May 2002 Location: Bay Area, San Jose Posts: 1,804 Trader Rating: (0) Feedback Score: 0 reviews	wastegate bar? ok... i just found out the wastegate that i had gotten was a .3 bar.... that means 4.5 psi correct?? and if i dont have a manual boost controller then i will only be pushing 4.5 psi... but if i did can i push more? or will i have to change the spring?

04-10-2003, 11:42 AM	#2
Tyler Durdan Zilvia Junkie Join Date: Feb 2002 Location: Don't mess with Texas Posts: 546 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, you will be set at 4.35psi with a .3 bar spring (14.5 *.3 = 4.35). If you want to push more boost, you can pick up a boost controller (manuel ones for like $60.00), or just buy another spring with a higher boost rating. I would suggest buying another spring because it's cheaper and will prevent boost spikes a lot better than boost controllers (at least the manuel ones). __________________ "Pure adrenaline attached to a license plate.  Isn't it time to experience one yourself?"                           -Dan Gurney Turbo for Sale

04-10-2003, 11:50 AM	#3
turbo240sx Zilvia Member Join Date: Oct 2002 Location: CT Posts: 166 Trader Rating: (0) Feedback Score: 0 reviews	YOU CAN ONLY INCREAE BOOST TO A POINT. THE SPRING WILL START CAUSING BOOST SPIKES CUZ OF ITS LOW SETTING TO BEGIN WITH. BETTER OFF GETTING A HIGER RATED SPRING. IF YOU WANNA GO OVER 10 PSI GET A STIFFER SPRING. __________________ 240sx s-13 TURBO weekend v-8 killer 90 Talon TSI WARNING.THIS CAR IS EQUIPPED WITH A TURBOCHARGER. DUE TO POSSIBLE BREATHING PROBLEMS UNDER HEAVY ACCELERATION, ALL FEMALES ARE ADVISED TO REMOVE ANY TIGHT FITTING OR RESTRICTIVE CLOTHING FOR SAFETY.

04-10-2003, 12:53 PM	#4
d240t2 Zilvia Member Join Date: Mar 2002 Location: Atlanta, GA Age: 44 Posts: 205 Trader Rating: (0) Feedback Score: 0 reviews	I've run 15psi on my .3bar Tial wastegate spring no problem for a long time. I don't see how it matters...since the boost controller applies boost pressure to the top of the wastegate to assist its closing. I mean, it isn't like the spring has to do any additional work...the boost on top of the wastegate does. Dennis