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

slideways2004 · 12-25-2008, 10:07 AM

I have a question about external wastegate placement. I am setting up my turbo kit and this will be my first external wastegate. I have heard stories about the wastegate pipe being too long from the manifold and causing boost creep issues. is there a recommended length the pipe should be?? i will be running the v44 tial wastegate on this manifold. flange will be cutoff and v-band welded on

p.s. any other manifold out there for t3 flange- 1jz

Rayne · 12-26-2008, 04:18 AM

If I recall correctly, the wastegate should be as close to the turbo as possible. The blow off valve should be relatively close to the throttle body.

smelly240 · 12-26-2008, 07:46 AM

lots of manifolds that are TOP NOTCH have the wastegate moved away from the turbo. look at fullrace with the twin scroll single gate. the gate is moved away BUT the place it mounts is right at the turbo on the collector(s)

S13Sr20detSilvia · 12-26-2008, 08:09 AM

i agree

quote=smelly240;2530877]lots of manifolds that are TOP NOTCH have the wastegate moved away from the turbo. look at fullrace with the twin scroll single gate. the gate is moved away BUT the place it mounts is right at the turbo on the collector(s)[/quote]

MadScientist · 12-26-2008, 09:41 AM

I ve been wondering about this myself... Commonly you see the WG on the collector or a short pipe running off it.

However I have seen a few skylines and RX-7s with crazy rear mounted WGs.... rear mount, as in, in the trunk like Ken Nomura (URAS BLITZ R34)

-Drew

smelly240 · 12-26-2008, 09:54 AM

Have you got a picture? I kinda wanna see that now

slideways2004 · 12-27-2008, 05:35 PM

and the verdict is?? mount it wherever you want??

i guess i can mount it almost the same length as it is now. if i have problems, i will cut and make it shorter

McRussellPants · 12-27-2008, 06:30 PM

Its not placement its flow that matters.

it doesn't matter how far away, it matters how easily exhaust will flow through it.

that manifold will creep like hell.

slideways2004 · 12-28-2008, 12:41 PM

Quote:

Originally Posted by McRussellPants

Its not placement its flow that matters.

it doesn't matter how far away, it matters how easily exhaust will flow through it.

that manifold will creep like hell.

that mani looks like it flows decent. its no full race but doesn't look that bad

crzycav86 · 12-28-2008, 01:57 PM

i agree with mcrusselpants. the manifold might flow pretty well to the turbo, but the exhaust has to go 180* in the opposite direction to get to the wastegate. that's not good for flow.

see if any supra guys have used it before.

5150Fab · 12-28-2008, 04:46 PM

You have to worry about those cheap manifolds collectors, make sure you debur it. They are known for cracking so you willprobably want to weld on some bracing from head flange to turbo flange.

If you are going to get a vband welded on and you have enough room to shorten it than why not.

Knockoff mani's are junk, this is one place you really shouldnt cheap out on, its just going to cost more in the long run and it wont perform anywhere near as good as the real thing. Ive fixed way to many of the crappy knockoffs.

If you go this way
1. Brace it
2. Dont heat wrap
3. shorten wg tube if possible
4. Pray

Good Luck

MadScientist · 12-28-2008, 05:09 PM

The Article from Import Tuner... but nothing about the WG.
Blitz Four Door ER34 Nissan Skyline D1 Drift Car - Featured Imports - Import Tuner

The Picture!

^^^ looking at the larger picture of this... it looks like its not connected to anything... and its venting inside the trunk that is open to the driver???? wtf????
-Drew

slideways2004 · 12-28-2008, 10:02 PM

Quote:

Originally Posted by MadScientist

The Article from Import Tuner... but nothing about the WG.
Blitz Four Door ER34 Nissan Skyline D1 Drift Car - Featured Imports - Import Tuner

The Picture!

^^^ looking at the larger picture of this... it looks like its not connected to anything... and its venting inside the trunk that is open to the driver???? wtf????
-Drew

wonder what the benefit of that is

slideways2004 · 12-28-2008, 11:20 PM

sp67 is t3 or t4??
My S14 build...for the lil guys...Wiisass cage...awesome 1JZ

is this car t3 or t4?? mani looks like a t4 but he said he has a gt35??
NEED HELP ANYONE WITH 1j/2j AND MICROTECH?

anybody know of a good quality t3 flange 1jzgte turbo mani?? seems like the t4 ebay mani's are much better quality than the t3

12-25-2008, 10:07 AM	#1
slideways2004 Nissanaholic! Join Date: Apr 2005 Location: Houston Age: 38 Posts: 1,706 Trader Rating: (6) Feedback Score: 6 reviews	wastegate placement I have a question about external wastegate placement. I am setting up my turbo kit and this will be my first external wastegate. I have heard stories about the wastegate pipe being too long from the manifold and causing boost creep issues. is there a recommended length the pipe should be?? i will be running the v44 tial wastegate on this manifold. flange will be cutoff and v-band welded on p.s. any other manifold out there for t3 flange- 1jz

12-26-2008, 04:18 AM	#2
Rayne Zilvia Addict Join Date: Feb 2005 Location: Earth Posts: 676 Trader Rating: (0) Rides Gallery: Rayne Feedback Score: 0 reviews	If I recall correctly, the wastegate should be as close to the turbo as possible. The blow off valve should be relatively close to the throttle body. __________________ Do need the Factory Service Manual? Click here.

12-26-2008, 07:46 AM	#3
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 47 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	lots of manifolds that are TOP NOTCH have the wastegate moved away from the turbo. look at fullrace with the twin scroll single gate. the gate is moved away BUT the place it mounts is right at the turbo on the collector(s) __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

12-26-2008, 09:54 AM	#6
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 47 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	Have you got a picture? I kinda wanna see that now __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

12-28-2008, 04:46 PM	#11
5150Fab Leaky Injector Join Date: Mar 2008 Location: Rhode Island Posts: 145 Trader Rating: (0) Feedback Score: 0 reviews	You have to worry about those cheap manifolds collectors, make sure you debur it. They are known for cracking so you willprobably want to weld on some bracing from head flange to turbo flange. If you are going to get a vband welded on and you have enough room to shorten it than why not. Knockoff mani's are junk, this is one place you really shouldnt cheap out on, its just going to cost more in the long run and it wont perform anywhere near as good as the real thing. Ive fixed way to many of the crappy knockoffs. If you go this way 1. Brace it 2. Dont heat wrap 3. shorten wg tube if possible 4. Pray Good Luck __________________ 51Fifty Fabrications PM me for braces 89' Coupe

12-26-2008, 08:09 AM	#4
S13Sr20detSilvia BANNED Join Date: Dec 2008 Location: Nova Age: 37 Posts: 9 Trader Rating: (0) Feedback Score: 0 reviews	i agree quote=smelly240;2530877]lots of manifolds that are TOP NOTCH have the wastegate moved away from the turbo. look at fullrace with the twin scroll single gate. the gate is moved away BUT the place it mounts is right at the turbo on the collector(s)[/quote]

12-26-2008, 09:41 AM	#5
MadScientist Zilvia.net Advertiser Join Date: Mar 2003 Location: NOLA Age: 48 Posts: 1,972 Trader Rating: (3) Feedback Score: 3 reviews	I ve been wondering about this myself... Commonly you see the WG on the collector or a short pipe running off it. However I have seen a few skylines and RX-7s with crazy rear mounted WGs.... rear mount, as in, in the trunk like Ken Nomura (URAS BLITZ R34) -Drew

12-27-2008, 05:35 PM	#7
slideways2004 Nissanaholic! Join Date: Apr 2005 Location: Houston Age: 38 Posts: 1,706 Trader Rating: (6) Feedback Score: 6 reviews	and the verdict is?? mount it wherever you want?? i guess i can mount it almost the same length as it is now. if i have problems, i will cut and make it shorter

12-27-2008, 06:30 PM	#8
McRussellPants Nissanaholic! Join Date: Oct 2005 Location: Austin, Tx Posts: 2,168 Trader Rating: (0) Feedback Score: 0 reviews	Its not placement its flow that matters. it doesn't matter how far away, it matters how easily exhaust will flow through it. that manifold will creep like hell.

12-28-2008, 01:57 PM	#10
crzycav86 Leaky Injector Join Date: Nov 2003 Location: tx Posts: 108 Trader Rating: (0) Feedback Score: 0 reviews	i agree with mcrusselpants. the manifold might flow pretty well to the turbo, but the exhaust has to go 180* in the opposite direction to get to the wastegate. that's not good for flow. see if any supra guys have used it before.

12-28-2008, 05:09 PM	#12
MadScientist Zilvia.net Advertiser Join Date: Mar 2003 Location: NOLA Age: 48 Posts: 1,972 Trader Rating: (3) Feedback Score: 3 reviews	The Article from Import Tuner... but nothing about the WG. Blitz Four Door ER34 Nissan Skyline D1 Drift Car - Featured Imports - Import Tuner The Picture! ^^^ looking at the larger picture of this... it looks like its not connected to anything... and its venting inside the trunk that is open to the driver???? wtf???? -Drew

12-28-2008, 11:20 PM	#14
slideways2004 Nissanaholic! Join Date: Apr 2005 Location: Houston Age: 38 Posts: 1,706 Trader Rating: (6) Feedback Score: 6 reviews	sp67 is t3 or t4?? My S14 build...for the lil guys...Wiisass cage...awesome 1JZ is this car t3 or t4?? mani looks like a t4 but he said he has a gt35?? NEED HELP ANYONE WITH 1j/2j AND MICROTECH? anybody know of a good quality t3 flange 1jzgte turbo mani?? seems like the t4 ebay mani's are much better quality than the t3