wastegate vacuum to bov vaccuum? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jacobzking · 02-09-2012, 12:49 AM

is it ok to hook up my waste gate vacuum to my BOV vacuum (on hot pipe FWIW). they are not T'd or anything, just straight from one to the other.

*fliprayzin240sx* · 02-09-2012, 12:54 AM

yes..........

jacobzking · 02-09-2012, 01:00 AM

Quote:

Originally Posted by fliprayzin240sx

yes..........

thanks mate!

PIN GIO 2 · 02-09-2012, 01:15 AM

sound like wrong

KiLLeR2001 · 02-09-2012, 02:07 AM

You want to do what? lol...

younghatchowner · 02-09-2012, 06:58 AM

wait a minute what...am i about to learn something new...

you can connect you wastegate vacuum str8 to your bov??

jacobzking · 02-09-2012, 07:07 AM

that's what I'm trying to figure out. it doesn't seem right though. seems like it would still need a vacuum source from the intake manifold...???

nissanfreak317 · 02-09-2012, 08:15 AM

It's times like these that I begin to worry.

Your blow off valve needs manifold pressure/vacuum, so run a tube from your manifold to your bov.

Your wastegate doesn"t necessarily need vacuum, so most people hook that up to their IC piping, I suppose in theory this could be hooked to the manifold but I wouldn't recommend that.

What you CANNOT do is hook you IC piping to both your BOV and WG. Your BOV will not function properly like that.

cotbu · 02-09-2012, 08:35 AM

This is not that hard fellas, bov's need vacuum and boost, waster gates need boost, fuel pressure regulators need boost and vacuum, boost gauges depending on type need boost obviously, boost/vacuum gauges needs well.... Anything before the throttle body and after the turbo is boost only, now this will change when the throttle body is open, but we still call this a boost only source. All of the nipples/ports on the manifold or after the throttle body butterfly is vacuum. Until the throttle body opens, it then can become vacuum/boost source.

jacobzking, your bov, need a source from the manifold, your gonna have to decide whether to T off something or not! Your waste gate can use any port pre throttle body

*fliprayzin240sx* · 02-09-2012, 05:16 PM

Wait...did he meant connect the 2 to each other (wastegate nipple to BOV nipple)? I was imagining in my head that he's running a nipple off the hot pipe...

Black R · 02-09-2012, 05:21 PM

Quote:

Originally Posted by cotbu

This is not that hard fellas, bov's need vacuum and boost, waster gates need boost, fuel pressure regulators need boost and vacuum, boost gauges depending on type need boost obviously, boost/vacuum gauges needs well.... Anything before the throttle body and after the turbo is boost only, now this will change when the throttle body is open, but we still call this a boost only source. All of the nipples/ports on the manifold or after the throttle body butterfly is vacuum. Until the throttle body opens, it then can become vacuum/boost source.

jacobzking, your bov, need a source from the manifold, your gonna have to decide whether to T off something or not! Your waste gate can use any port pre throttle body

What would happen if you ran the line from the IM post tb to the wastegate?

cotbu · 02-09-2012, 06:26 PM

Nothing really, it just doesn't need a vacuum source to function. It may slow spool slightly, but you probably wont notice that though.

TheRealSy90 · 02-09-2012, 06:27 PM

Somebody make a "best vacuum routing" thingy with paint haha. Shit confused me.

jacobzking · 02-09-2012, 09:45 PM

ok... so can i run a T from the throttle body (one of the 2 nipples under the TB) to the waste gate and BOV?

so basically BOV and waste gate go in to T that goes to throttle body?

KiLLeR2001 · 02-09-2012, 09:59 PM

Quote:

Originally Posted by jacobzking

ok... so can i run a T from the throttle body (one of the 2 nipples under the TB) to the waste gate and BOV?

so basically BOV and waste gate go in to T that goes to throttle body?

No. BOV needs to go to a nipple after throttle plate. Wastegate needs a boost source BEFORE throttle plate.

Stock S13 SR20DET diagram.

jacobzking · 02-09-2012, 11:16 PM

Quote:

Originally Posted by KiLLeR2001

No. BOV needs to go to a nipple after throttle plate. Wastegate needs a boost source BEFORE throttle plate.

cool, i just ran a hose from the WG straight to the front side of the TB and a hose straight from the BOV to the backside of the TB. I'll give her a go tomorrow and see who she responds.

I drove her earlier today and she ran overall pretty well, but had some boosting issues, and I would suppose that's why.

i also need to tune my BOV but I'm thinking between fixing the vacuum hoses and adjusting the BOV she'll run like a dream.

thanks again!!!

02-09-2012, 12:49 AM	#1
jacobzking Zilvia Member Join Date: Nov 2011 Location: Frisco, TX Age: 44 Posts: 288 Trader Rating: (3) Feedback Score: 3 reviews	wastegate vacuum to bov vaccuum? is it ok to hook up my waste gate vacuum to my BOV vacuum (on hot pipe FWIW). they are not T'd or anything, just straight from one to the other.

02-09-2012, 12:54 AM	#2
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	yes.......... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

02-09-2012, 02:07 AM	#5
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	You want to do what? lol... __________________

02-09-2012, 08:15 AM	#8
nissanfreak317 Zilvia Junkie Join Date: Apr 2008 Location: Souderton, PA Age: 39 Posts: 597 Trader Rating: (18) Feedback Score: 18 reviews	It's times like these that I begin to worry. Your blow off valve needs manifold pressure/vacuum, so run a tube from your manifold to your bov. Your wastegate doesn"t necessarily need vacuum, so most people hook that up to their IC piping, I suppose in theory this could be hooked to the manifold but I wouldn't recommend that. What you CANNOT do is hook you IC piping to both your BOV and WG. Your BOV will not function properly like that. __________________ WTB: S13 Silvia front pieces Need: Hood, Fenders, Bumper, Headlights + brackets. Have decent pop-up front to trade with oem hood + vis racing carbon fiber hood if interested.

02-09-2012, 08:35 AM	#9
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	This is not that hard fellas, bov's need vacuum and boost, waster gates need boost, fuel pressure regulators need boost and vacuum, boost gauges depending on type need boost obviously, boost/vacuum gauges needs well.... Anything before the throttle body and after the turbo is boost only, now this will change when the throttle body is open, but we still call this a boost only source. All of the nipples/ports on the manifold or after the throttle body butterfly is vacuum. Until the throttle body opens, it then can become vacuum/boost source. jacobzking, your bov, need a source from the manifold, your gonna have to decide whether to T off something or not! Your waste gate can use any port pre throttle body __________________ LoverTechnologies "Half Broken Things!"

02-09-2012, 01:15 AM	#4
PIN GIO 2 Zilvia FREAK! Join Date: Sep 2008 Location: Ontario, California Age: 35 Posts: 1,355 Trader Rating: (20) Feedback Score: 20 reviews	sound like wrong

02-09-2012, 06:58 AM	#6
younghatchowner Zilvia Junkie Join Date: Nov 2009 Location: Central Florida Age: 35 Posts: 448 Trader Rating: (1) Feedback Score: 1 reviews	wait a minute what...am i about to learn something new... you can connect you wastegate vacuum str8 to your bov??

02-09-2012, 07:07 AM	#7
jacobzking Zilvia Member Join Date: Nov 2011 Location: Frisco, TX Age: 44 Posts: 288 Trader Rating: (3) Feedback Score: 3 reviews	that's what I'm trying to figure out. it doesn't seem right though. seems like it would still need a vacuum source from the intake manifold...???

02-09-2012, 05:16 PM	#10
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Wait...did he meant connect the 2 to each other (wastegate nipple to BOV nipple)? I was imagining in my head that he's running a nipple off the hot pipe... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

02-09-2012, 06:26 PM	#12
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Nothing really, it just doesn't need a vacuum source to function. It may slow spool slightly, but you probably wont notice that though. __________________ LoverTechnologies "Half Broken Things!"

02-09-2012, 09:45 PM	#14
jacobzking Zilvia Member Join Date: Nov 2011 Location: Frisco, TX Age: 44 Posts: 288 Trader Rating: (3) Feedback Score: 3 reviews	ok... so can i run a T from the throttle body (one of the 2 nipples under the TB) to the waste gate and BOV? so basically BOV and waste gate go in to T that goes to throttle body?