S15 SR turbo manifold vs. S13 mani - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Def · 09-03-2010, 10:44 PM

Do the later OEM SR turbo manifolds like the S15 one flow more than the S13 OEM SR20DET turbo manifold?

Not looking to use a tubular manifold.

Search is down right now, so no bitching if this has already been covered.

K_style · 09-03-2010, 10:49 PM

I believe they are same..

Om1kron · 09-03-2010, 11:12 PM

Quote:

Originally Posted by K_style

I believe they are same..

Pretty much. But nobody really has any flow numbers to prove this. There may have been small improvements in the casting process but I highly doubt it. Probably a lot cheaper to go with the same design on the exhaust side to save some money in production.

K_style · 09-03-2010, 11:15 PM

Quote:

Originally Posted by Om1kron

Probably a lot cheaper to go with the same design on the exhaust side to save some money in production.

+1 for sure

S13SILVIA|E46M3 · 09-04-2010, 12:03 AM

These pics probably won't help much. They are the closes comparison pics I could find...
S15

S13

S15

Couldn't find a non S15 mani port shot.
Hope these Help.....

Def · 09-04-2010, 12:14 AM

I can spot a few minor differences, but yea, it does look pretty similar. I remember hearing many years ago S14+ manifolds flowed more, but like so much info back then, it was probably just something somebody pulled out of their ass.

Om1kron · 09-04-2010, 08:50 AM

The S14/15 manifold looks like it has a really long number 1 runner like the tomei manifold. Where the s13 looks like it's broken up and more like a log manifold. But I'm pretty sure they flow the same.

airhead · 09-08-2010, 11:09 PM

just ordered a s15 mani going to replace it with my aftermarket mani.

Om1kron · 09-09-2010, 02:25 AM

Quote:

Originally Posted by airhead

just ordered a s15 mani going to replace it with my aftermarket mani.

you ordered an s15 manifold and are going to replace it with an aftermarket manifold. Did you read what you typed before hitting submit?

Okinawandrifter87 · 09-09-2010, 02:51 AM

I heard that they flowed a little bit better but wow at 2 posts above me lol.

irax · 09-09-2010, 04:34 AM

well his screen name is in fact Airhead....

Okinawandrifter87 · 09-09-2010, 04:42 AM

Survival of the fittest at its best lol.

airhead · 09-09-2010, 05:04 AM

lol i just caught that i was laying in bed when i typed that

Okinawandrifter87 · 09-09-2010, 05:09 AM

How does that justify what you typed lol?

airhead · 09-09-2010, 05:45 AM

Ill be replacing the weakass china made aftermarket manifold with a S15 manifold

Okinawandrifter87 · 09-09-2010, 05:54 AM

So then you did mean what you originally typed?

conrad_s13.5 · 09-09-2010, 01:07 PM

yup......lol

unless you have one laying around,. i dnt see this being an upgrade to justify spending the money

Team DET · 09-09-2010, 01:20 PM

what's that, next to the short runner on the s15 mani

RurouniMidnight · 09-09-2010, 01:53 PM

I've heard they flow a little better also but don't have any facts, It would be cool if they did cause I have a s15 Sr and will probably be sticking with stock manifold when I upgrade turbos due to it being cast, a little extra flow would be a nice addition.

Homer_Simpson · 09-09-2010, 02:13 PM

Quote:

Originally Posted by Team DET

what's that, next to the short runner on the s15 mani

Looks like a blind hole that was intended for EGR.

ixfxi · 12-26-2014, 12:03 PM

Take a look at this ebay link and in particular, pay attention to the exhaust manifold photos:
http://www.ebay.com/itm/251766101229

I always thought that the S14/S15 exhaust manifolds had an EGR port provision, but it does not appear to be the case. Looks like it goes to the valve cover guys for blow by. I was under the impression that a 1-way valve was required to do that.

***S14DB*** · 12-26-2014, 12:15 PM

Quote:

Originally Posted by ixfxi

Take a look at this ebay link and in particular, pay attention to the exhaust manifold photos:
http://www.ebay.com/itm/251766101229

I always thought that the S14/S15 exhaust manifolds had an EGR port provision, but it does not appear to be the case. Looks like it goes to the valve cover guys for blow by. I was under the impression that a 1-way valve was required to do that.

The EGR is only on the EU spec 200SX S14. The JDM S14's didn't have EGR.

I have the JDM and UK FSMs. Also have a Kouki S14SR with no EGR provision.

ixfxi · 12-26-2014, 03:37 PM

OK, that makes sense. I looked at my 1994 S14 Silvia FSM and attached a photo, looks like that IS for an EGR port after all. I compared that with the S15 FSM and it doesnt show an EGR provision at all.

Its the angle that makes it confusing, because when you look at the photo it looks like that "blowby hose" connects to the exhaust manifold, I was scratching my head.

I wonder what variable dictates whether or not the vehicle was equipped with an EGR or not. Maybe UK market requires it for smog? It does not appear that the Japan market cars had them. ???

Agent S14 · 12-26-2014, 03:41 PM

so a S15 SR turbo manifold is better than a tomei or megan racing turbo manifold?

Def · 12-26-2014, 03:42 PM

I have an S15 SR20DET - no EGR on the engine. It didn't come with the stock manifold though.

Dboyizmlg · 12-26-2014, 04:40 PM

Quote:

Originally Posted by Agent S14

so a S15 SR turbo manifold is better than a tomei or megan racing turbo manifold?

Yes much better!
Go buy one!

Tom N · 12-26-2014, 05:05 PM

Quote:

Originally Posted by Def

I have an S15 SR20DET - no EGR on the engine. It didn't come with the stock manifold though.

I have a complete S15 motor with S15 turbo manifold. That nipple on the manifold is for a egr but not all were drilled and tapped for a egr. My doesn't have a egr.
To my understanding the S15 flows slightly better as the runners are slightly bigger. If you intend to port it real good this doesn't really matter much.
The S15 also supposedly has a higher Inconel content than the cheaper S13 manifold.

ixfxi · 12-26-2014, 05:16 PM

Quote:

Originally Posted by Tom N

The S15 also supposedly has a higher Inconel content than the cheaper S13 manifold.

uh oh... here we go again with that magic word. :-)

i have both manifolds, i didnt notice anything special or different about either of them.

but, i will be pulling the manifold (again) from my non working museum piece of an s13 and re-drill the manifold for m10 hardware. i'll snap photos and inspect both so that we can see if there are any visible differences.

by the way, do any of the mods or admins here have the ability to increase my storage capacity for attachments? ive been a member (forever) and it would be nice if i can increase the storage. i've uploaded so many photos over the years that i am near my max.

Agent S14 · 12-26-2014, 08:32 PM

Quote:

Originally Posted by Dboyizmlg

Yes much better!
Go buy one!

I have an s15 motor with s15 oem turbo manifold I just find it hard to believe .

Kingtal0n · 12-26-2014, 08:47 PM

the s15 manifolds are usually much prettier and less rusted.

09-03-2010, 10:44 PM	#1
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	S15 SR turbo manifold vs. S13 mani Do the later OEM SR turbo manifolds like the S15 one flow more than the S13 OEM SR20DET turbo manifold? Not looking to use a tubular manifold. Search is down right now, so no bitching if this has already been covered. __________________ S13 Hatch - Goes around tracks quickly DEFSPORT

09-04-2010, 12:03 AM	#5
S13SILVIA\|E46M3 Zilvia Member Join Date: Sep 2006 Location: Cali Posts: 157 Trader Rating: (8) Feedback Score: 8 reviews	These pics probably won't help much. They are the closes comparison pics I could find... S15 S13 S15 Couldn't find a non S15 mani port shot. Hope these Help..... __________________ S13 SR\|G37\|E46 Wagon\|X5 35d

09-04-2010, 12:14 AM	#6
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	I can spot a few minor differences, but yea, it does look pretty similar. I remember hearing many years ago S14+ manifolds flowed more, but like so much info back then, it was probably just something somebody pulled out of their ass. __________________ S13 Hatch - Goes around tracks quickly DEFSPORT

09-04-2010, 08:50 AM	#7
Om1kron Post Whore! Join Date: Sep 2004 Location: Granada Hills, CA Age: 43 Posts: 6,990 Trader Rating: (15) Feedback Score: 15 reviews	The S14/15 manifold looks like it has a really long number 1 runner like the tomei manifold. Where the s13 looks like it's broken up and more like a log manifold. But I'm pretty sure they flow the same. __________________ Wayne Edwards https://om1kron.blogspot.com

09-08-2010, 11:09 PM	#8
airhead Nissanaholic! Join Date: Dec 2005 Location: IE/OC Posts: 1,885 Trader Rating: (32) Feedback Score: 32 reviews	just ordered a s15 mani going to replace it with my aftermarket mani. __________________

09-03-2010, 10:49 PM	#2
K_style Post Whore! Join Date: Dec 2007 Location: Henderson, NV Posts: 7,666 Trader Rating: (63) Rides Gallery: K_style Feedback Score: 63 reviews	I believe they are same..

09-09-2010, 02:51 AM	#10
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	I heard that they flowed a little bit better but wow at 2 posts above me lol. __________________ Driftphreak87

09-09-2010, 04:34 AM	#11
irax Post Whore! Join Date: Aug 2003 Location: San Diego Age: 40 Posts: 4,248 Trader Rating: (4) Feedback Score: 4 reviews	well his screen name is in fact Airhead.... __________________ Drives a BRZ and is building a V6 S12 coupe.

09-09-2010, 04:42 AM	#12
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Survival of the fittest at its best lol. __________________ Driftphreak87

09-09-2010, 05:04 AM	#13
airhead Nissanaholic! Join Date: Dec 2005 Location: IE/OC Posts: 1,885 Trader Rating: (32) Feedback Score: 32 reviews	lol i just caught that i was laying in bed when i typed that __________________

09-09-2010, 05:09 AM	#14
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	How does that justify what you typed lol? __________________ Driftphreak87

09-09-2010, 05:45 AM	#15
airhead Nissanaholic! Join Date: Dec 2005 Location: IE/OC Posts: 1,885 Trader Rating: (32) Feedback Score: 32 reviews	Ill be replacing the weakass china made aftermarket manifold with a S15 manifold __________________

09-09-2010, 05:54 AM	#16
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	So then you did mean what you originally typed? __________________ Driftphreak87

09-09-2010, 01:07 PM	#17
conrad_s13.5 Zilvia FREAK! Join Date: Jan 2009 Location: STL Age: 36 Posts: 1,533 Trader Rating: (6) Feedback Score: 6 reviews	yup......lol unless you have one laying around,. i dnt see this being an upgrade to justify spending the money __________________ cONtRol FReAkS

09-09-2010, 01:20 PM	#18
Team DET Zilvia Addict Join Date: May 2008 Location: San Bernardino Posts: 770 Trader Rating: (13) Feedback Score: 13 reviews	what's that, next to the short runner on the s15 mani __________________ (OΞO/- -\OΞO)

09-09-2010, 01:53 PM	#19
RurouniMidnight Zilvia FREAK! Join Date: Feb 2004 Location: Houston TX Age: 41 Posts: 1,245 Trader Rating: (12) Feedback Score: 12 reviews	I've heard they flow a little better also but don't have any facts, It would be cool if they did cause I have a s15 Sr and will probably be sticking with stock manifold when I upgrade turbos due to it being cast, a little extra flow would be a nice addition. __________________ http://nightparade.wordpress.com/ Join in on instagram @nightparade

12-26-2014, 12:03 PM	#21
ixfxi Post Whore! Join Date: Apr 2006 Location: bangin on my chest Account: BANNED #fucksupreme Age: 82 Posts: 5,932 Trader Rating: (3) Feedback Score: 3 reviews	Take a look at this ebay link and in particular, pay attention to the exhaust manifold photos: http://www.ebay.com/itm/251766101229 I always thought that the S14/S15 exhaust manifolds had an EGR port provision, but it does not appear to be the case. Looks like it goes to the valve cover guys for blow by. I was under the impression that a 1-way valve was required to do that.

12-26-2014, 03:41 PM	#24
Agent S14 Zilvia Member Join Date: Mar 2009 Location: Houston Age: 37 Posts: 296 Trader Rating: (3) Feedback Score: 3 reviews	so a S15 SR turbo manifold is better than a tomei or megan racing turbo manifold?

12-26-2014, 03:42 PM	#25
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	I have an S15 SR20DET - no EGR on the engine. It didn't come with the stock manifold though. __________________ S13 Hatch - Goes around tracks quickly DEFSPORT

12-26-2014, 08:47 PM	#30
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 41 Posts: 4,828 Trader Rating: (17) Feedback Score: 17 reviews	the s15 manifolds are usually much prettier and less rusted.