GReddy Type S BOV install...but what about the - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Siizzzoooo · 05-31-2003, 02:07 PM

I am attempting to complete this here when i get some time.

M current setup includes the HT Hotpipe.

My question is...Do I need to do anything to the factory bypass valve that is located in my fenderwell?--that bypass valve is also hooked up to the sidemount IC.

Or do all u have to do is install the GReddy on the hotpipe, run the vacuum hose from the TB, and then recirculate into the intake plumbing?<--Is this necessary first of all?

Am I leaving anything out?

I'm goin on 3 hours of sleep, so please forgive me for my lack of info

nissan_s14 · 05-31-2003, 10:22 PM

not to confuse the issue anymore...but i thought the best place to put a BOV would be on your pipe closest to the throttle body?
At least, thats what SCC told me!

Siizzzoooo · 06-01-2003, 10:29 AM

thats what i thought as well prior to coming into the world of 240s, and here all i see is BOVs on their hotpipe--theres a reason for everything

RanciD · 06-01-2003, 10:40 AM

I'd imagine that the reason for putting it on the cold pipe is cause there's really no reason to cool air if it's not going to your engine anyway, it's a waste. There's probably a better reason though. And yes, you should recirculate the blow off air back into the intake otherwise you're going to mess with your air-fuel ratios and your car isn't going to run right (it will run rich everytime you shift if I'm not mistaken).

Joe_M · 06-01-2003, 04:46 PM

The reasoning behind putting it in the cold pipe near the throttle body is because when the throttle is slammed shut during shifts, this is the 1st place most of the surge is occuring. It really makes no difference if it is in the cold or hot pipe.

Joe

Carter · 03-21-2004, 07:33 PM

I know this is an old thread, but I figure I might as well bump this up instead of making my own because it's the same question. What do I need to do with my stock bypass valve? I heard that I need a delete plate, does this have to be fabricated?

nismofeind · 03-21-2004, 10:40 PM

well since your are using a smic you are probably using the stock cold pipe which is plastic, its going on your hot pipe in that case. You can get a 1.5 or 2 in hose block thing.or take a piece of hose that fits and stick it on the fitting and a block of something, metal or pvcor whatever on the other end.

where to place the bov is optional. closest to the throttle body you will get the best throttle response but more surge. closest to the turbo and you get less response and more surge.

bigjasoni · 03-22-2004, 02:03 AM

If you keep the side mount I would strongly recomend upgrading the piping.

nismofeind · 03-22-2004, 01:01 PM

Quote:

Originally Posted by bigjasoni

If you keep the side mount I would strongly recomend upgrading the piping.

why??? it would be nice but its expensive to do. only company I saw that has a set is cusco or 5zigen i think and those are expensive.

rrobe99999 · 03-23-2004, 11:35 AM

Simple answer. Remove stock bypass valve. Plug any holes that are left in IC pinping / air intake. Move the vacuum line from stock bypass valve to new BOV. If you want to leave the stock bypass valve in place, just cap the vacuum port to make sure it stays shut. This would eleminate the need to plug holes, but rumor has it that it will leak under high boost.

05-31-2003, 02:07 PM	#1
Siizzzoooo Zilvia FREAK! Join Date: Feb 2002 Location: Murfreesboro,TN Posts: 1,355 Trader Rating: (0) Feedback Score: 0 reviews	GReddy Type S BOV install...but what about the I am attempting to complete this here when i get some time. M current setup includes the HT Hotpipe. My question is...Do I need to do anything to the factory bypass valve that is located in my fenderwell?--that bypass valve is also hooked up to the sidemount IC. Or do all u have to do is install the GReddy on the hotpipe, run the vacuum hose from the TB, and then recirculate into the intake plumbing?<--Is this necessary first of all? Am I leaving anything out? I'm goin on 3 hours of sleep, so please forgive me for my lack of info

06-01-2003, 10:40 AM	#4
RanciD Zilvia Junkie Join Date: Apr 2003 Location: Nashville Posts: 375 Trader Rating: (5) Feedback Score: 5 reviews	I'd imagine that the reason for putting it on the cold pipe is cause there's really no reason to cool air if it's not going to your engine anyway, it's a waste. There's probably a better reason though. And yes, you should recirculate the blow off air back into the intake otherwise you're going to mess with your air-fuel ratios and your car isn't going to run right (it will run rich everytime you shift if I'm not mistaken). __________________ '92 240SX, '07 G35S 6MT, '09 CBR600RR

06-01-2003, 04:46 PM	#5
Joe_M Zilvia Member Join Date: Apr 2002 Location: Cincinnati, OH Age: 46 Posts: 210 Trader Rating: (0) Feedback Score: 0 reviews	The reasoning behind putting it in the cold pipe near the throttle body is because when the throttle is slammed shut during shifts, this is the 1st place most of the surge is occuring. It really makes no difference if it is in the cold or hot pipe. Joe __________________ 1991 240SX LE Fastback SOLD!! 1992 USDM OneVia CA18DET powered SOLD!! 1996 240SX Base Model Rockin' the 4 Lug 1995 240SX Base Model $400 project car... and it runs!

05-31-2003, 10:22 PM	#2
nissan_s14 Leaky Injector Join Date: Mar 2002 Posts: 108 Trader Rating: (0) Feedback Score: 0 reviews	not to confuse the issue anymore...but i thought the best place to put a BOV would be on your pipe closest to the throttle body? At least, thats what SCC told me!

06-01-2003, 10:29 AM	#3
Siizzzoooo Zilvia FREAK! Join Date: Feb 2002 Location: Murfreesboro,TN Posts: 1,355 Trader Rating: (0) Feedback Score: 0 reviews	thats what i thought as well prior to coming into the world of 240s, and here all i see is BOVs on their hotpipe--theres a reason for everything

03-21-2004, 07:33 PM	#6
Carter Join Date: Jan 2004 Location: Va Beach, VA Posts: 35 Trader Rating: (0) Feedback Score: 0 reviews	I know this is an old thread, but I figure I might as well bump this up instead of making my own because it's the same question. What do I need to do with my stock bypass valve? I heard that I need a delete plate, does this have to be fabricated?

03-21-2004, 10:40 PM	#7
nismofeind Leaky Injector Join Date: Dec 2002 Location: Chicago Posts: 142 Trader Rating: (0) Feedback Score: 0 reviews	well since your are using a smic you are probably using the stock cold pipe which is plastic, its going on your hot pipe in that case. You can get a 1.5 or 2 in hose block thing.or take a piece of hose that fits and stick it on the fitting and a block of something, metal or pvcor whatever on the other end. where to place the bov is optional. closest to the throttle body you will get the best throttle response but more surge. closest to the turbo and you get less response and more surge.

03-22-2004, 02:03 AM	#8
bigjasoni Join Date: Dec 2003 Location: Fredericksburg VA Age: 48 Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	If you keep the side mount I would strongly recomend upgrading the piping.

03-23-2004, 11:35 AM	#10
rrobe99999 Zilvia Member Join Date: Jul 2003 Location: Destin, Fl Posts: 262 Trader Rating: (0) Feedback Score: 0 reviews	Simple answer. Remove stock bypass valve. Plug any holes that are left in IC pinping / air intake. Move the vacuum line from stock bypass valve to new BOV. If you want to leave the stock bypass valve in place, just cap the vacuum port to make sure it stays shut. This would eleminate the need to plug holes, but rumor has it that it will leak under high boost.