Zenki or Kouki SR? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

rwtf · 10-22-2011, 10:14 AM

I got a s14 sr i'm rebuilding and I would really like to know if its a kouki or zenki...

I've been doing alot of reading and NO ONE has a defined answer...

I read something about the VC bolts, mine has studs on the corners and the middle, the rest are bolts.

also, If i were to get a kouki ECU and harness, would I be able to use it on a zenki motor?

Toi · 10-22-2011, 12:34 PM

Because no one calls SRs Zenki or Kouki those apply more to the body type.

As for SR's

You have Black Top, Red Top, and then Black Top with VTC....

Nissan SR20DET - Wikipedia, the free encyclopedia

Dig up the FAQs and search this forum its ALL here and all been covered.

Oh yea, break out the flame suit

GSXRJJordan · 10-22-2011, 12:42 PM

There are certainly differences between Zenki blacktop SR's (VTC) and Kouki blacktop SR's (VTC) - the big one for me is ECU code and wiring, since there's virtually no documentation on kouki SR's (NA ECU I believe). First couple swaps I did with those were lots of trial and error.

I don't know if Zenki/Kouki SR harnesses are interchangeable, but my guess is yes if you have the sub-harnesses as well.

MadScientist · 10-22-2011, 01:51 PM

Count the # of wires coming out of the ECU. There are 4 sections.

Zenki SR has 8/10/10/10 (the only S-chassis with this sequence)

Kouki SR has 8/7/8/10 (same for non turbo Zenki and Kouki and all S15s)

All S13 SRs are 8/7/8/9.

hope this helps... its old ass info I had from 01'

-Drew

GSXRJJordan · 10-22-2011, 02:13 PM

Kouki SR definitely has different wiring than S15, but yeah, same ECU layout as I recall.

Zerolift Autolab · 10-22-2011, 02:53 PM

Easiest way is the Physical Measure of the ECU plug side to side.
Zenki is a bit larger than the Kouki.

With the S14's ... yes you can run a Early Harness, Ecu, Maf on a Late Engine.
and the other way around.
Can do the same for S15, but you have to change valve cover, and ignition coils also.

*fliprayzin240sx* · 10-23-2011, 07:28 AM

IIRC the MAF plugs are different too. So you're swapping harnesses, make sure you got the right MAF too.

Whats the reason you're asking for a difference between the 2 anyway? Is the engine already swapped in or you're still prepping to do the swap?

Breakbeat93 · 10-23-2011, 08:35 AM

Quote:

Originally Posted by Toi

Because no one calls SRs Zenki or Kouki those apply more to the body type.

As for SR's

You have Black Top, Red Top, and then Black Top with VTC....

Nissan SR20DET - Wikipedia, the free encyclopedia

Dig up the FAQs and search this forum its ALL here and all been covered.

Oh yea, break out the flame suit

you should be strapping up your flame suit, because you sir havent the slightest clue what youre talking about...wikipedia....jackass

poster i am running a 98 motor with a 96 ecu/harness. runs great. no sense in beating your head against the wall trying to get the kouki ecu wired up. just go with the older ecu/harness(sounds like you have no ecu/harness right now), they will be easier to find also.

mewantkouki · 11-07-2011, 11:10 AM

Late model s14 and s15 sr20's have heat sink fins on the head like the later model blacktop s13 sr20's.

Zenki S14 Sr20det: Smooth front

Kouki S14 Sr20det: Half finned front

S15 SR20det: Fully finned front

Second picture is kind of difficult to see but they are definitely different. (Look to the right of the VTC hump)

As far as quality and internals they are identical. Another telltale difference between kouki, zenki and s15 sr20's are the sensors on the intake manifolds.

The Zenki SR's got the red coolant temp sensors while the later model S14/S15 sr20's got the blue two prong coolant temp sensors. They also had other stupid little additions like ratcheting oil caps.

rastaman · 11-07-2011, 12:29 PM

nice i need one of these soon

Slidin' Sam · 11-14-2011, 12:03 PM

"mewantkouki" is correct. Look at the head for indication of what engine it is. You can run either ecu, wc (zenki) or na (kouki), just as long as you use the corresponding harness, ie, wc ecu w/ wc harness. You can change the harness from kouki to zenki without problems (maf, cas, etc). Kouki s14 comes with a different turbine though. It is the same as s15 except it does not have a divided exhaust housing.

EDacIouSX · 11-17-2011, 06:30 AM

Quote:

Originally Posted by Slidin' Sam

"mewantkouki" is correct. Look at the head for indication of what engine it is. You can run either ecu, wc (zenki) or na (kouki), just as long as you use the corresponding harness, ie, wc ecu w/ wc harness. You can change the harness from kouki to zenki without problems (maf, cas, etc). Kouki s14 comes with a different turbine though. It is the same as s15 except it does not have a divided exhaust housing.

its not the same. part numbers are different, s15 is slightly bigger and dual ball bearing. s14 turbos are the same size but zenki is journal bearing and kouki is ball bearing. that fact alone should theoretically make the maps different from a zenki a.d a kouki motor since the kouki motor will make power earlier than the zenki. may not be wise to run a zenki harness and ecu on a kouki or vice versa. someone correct me if I'm wrong though, Jordan may be able to add wiser insight than me.

Breakbeat93 · 11-17-2011, 06:36 AM

Quote:

Originally Posted by EDacIouSX

its not the same. part numbers are different, s15 is slightly bigger and dual ball bearing. s14 turbos are the same size but zenki is journal bearing and kouki is ball bearing. that fact alone should theoretically make the maps different from a zenki a.d a kouki motor since the kouki motor will make power earlier than the zenki. may not be wise to run a zenki harness and ecu on a kouki or vice versa. someone correct me if I'm wrong though, Jordan may be able to add wiser insight than me.

I run a zenki ecu w kouki motor. Afr is very slightly high between 2-3k, mid 12s. There's not a lot of load on the motor at those revs tho, so its really not a problem

Slidin' Sam · 11-20-2011, 12:57 PM

Quote:

Originally Posted by EDacIouSX

its not the same. part numbers are different, s15 is slightly bigger and dual ball bearing. s14 turbos are the same size but zenki is journal bearing and kouki is ball bearing. that fact alone should theoretically make the maps different from a zenki a.d a kouki motor since the kouki motor will make power earlier than the zenki. may not be wise to run a zenki harness and ecu on a kouki or vice versa. someone correct me if I'm wrong though, Jordan may be able to add wiser insight than me.

I have been playing with s14 sr's exclusively for the last 3yrs. Currently have a kouki s14 sr, w/ zenki harness/ecu and I have no map issues.

Yes, the part number is different between kouki s14 and s15, but the only difference between the turbo's is the exhaust housing...the s15 has a divided exhaust housing, whereas the kouki s14 does not.

Shift n Drift · 01-24-2012, 02:12 AM

this is the kouki harness plug and works with NA ecu

zenki is wider and works with WC ecu, and only uses 22680-68f00 maf

if your building it and need something, i got this

power fc with commander and kouki harness wired for s13 for 700 shipped

maces13 · 06-13-2014, 06:05 AM

I hate posting on old threads but this was some good info that I'm sure some people don't know

10-22-2011, 10:14 AM	#1
rwtf Zilvia Addict Join Date: Jun 2011 Location: Maryville, TN Age: 29 Posts: 830 Trader Rating: (3) Feedback Score: 3 reviews	Zenki or Kouki SR? I got a s14 sr i'm rebuilding and I would really like to know if its a kouki or zenki... I've been doing alot of reading and NO ONE has a defined answer... I read something about the VC bolts, mine has studs on the corners and the middle, the rest are bolts. also, If i were to get a kouki ECU and harness, would I be able to use it on a zenki motor?

10-22-2011, 12:42 PM	#3
GSXRJJordan Post Whore! Join Date: May 2006 Location: << 626 >> Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	There are certainly differences between Zenki blacktop SR's (VTC) and Kouki blacktop SR's (VTC) - the big one for me is ECU code and wiring, since there's virtually no documentation on kouki SR's (NA ECU I believe). First couple swaps I did with those were lots of trial and error. I don't know if Zenki/Kouki SR harnesses are interchangeable, but my guess is yes if you have the sub-harnesses as well. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

10-22-2011, 02:13 PM	#5
GSXRJJordan Post Whore! Join Date: May 2006 Location: << 626 >> Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Kouki SR definitely has different wiring than S15, but yeah, same ECU layout as I recall. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

10-22-2011, 02:53 PM	#6
Zerolift Autolab Post Whore! Join Date: Jan 2008 Location: Fairfield, OH 45014 Age: 38 Posts: 2,804 Trader Rating: (12) Feedback Score: 12 reviews	Easiest way is the Physical Measure of the ECU plug side to side. Zenki is a bit larger than the Kouki. With the S14's ... yes you can run a Early Harness, Ecu, Maf on a Late Engine. and the other way around. Can do the same for S15, but you have to change valve cover, and ignition coils also. __________________ Contact: Phone - 513-874-2508 AIM - ZLR0bert Email - [email protected] Zerolift facebook - http://www.facebook.com/Zerolift

10-23-2011, 07:28 AM	#7
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	IIRC the MAF plugs are different too. So you're swapping harnesses, make sure you got the right MAF too. Whats the reason you're asking for a difference between the 2 anyway? Is the engine already swapped in or you're still prepping to do the swap? __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

10-22-2011, 12:34 PM	#2
Toi Zilvia Member Join Date: Aug 2010 Location: Japan Age: 44 Posts: 224 Trader Rating: (1) Feedback Score: 1 reviews	Because no one calls SRs Zenki or Kouki those apply more to the body type. As for SR's You have Black Top, Red Top, and then Black Top with VTC.... Nissan SR20DET - Wikipedia, the free encyclopedia Dig up the FAQs and search this forum its ALL here and all been covered. Oh yea, break out the flame suit

10-22-2011, 01:51 PM	#4
MadScientist Zilvia.net Advertiser Join Date: Mar 2003 Location: NOLA Age: 44 Posts: 1,964 Trader Rating: (3) Feedback Score: 3 reviews	Count the # of wires coming out of the ECU. There are 4 sections. Zenki SR has 8/10/10/10 (the only S-chassis with this sequence) Kouki SR has 8/7/8/10 (same for non turbo Zenki and Kouki and all S15s) All S13 SRs are 8/7/8/9. hope this helps... its old ass info I had from 01' -Drew

11-07-2011, 11:10 AM	#9
mewantkouki Zilvia FREAK! Join Date: Nov 2007 Location: Orlando, Fl Age: 35 Posts: 1,221 Trader Rating: (36) Feedback Score: 36 reviews	Late model s14 and s15 sr20's have heat sink fins on the head like the later model blacktop s13 sr20's. Zenki S14 Sr20det: Smooth front Kouki S14 Sr20det: Half finned front S15 SR20det: Fully finned front Second picture is kind of difficult to see but they are definitely different. (Look to the right of the VTC hump) As far as quality and internals they are identical. Another telltale difference between kouki, zenki and s15 sr20's are the sensors on the intake manifolds. The Zenki SR's got the red coolant temp sensors while the later model S14/S15 sr20's got the blue two prong coolant temp sensors. They also had other stupid little additions like ratcheting oil caps. Last edited by mewantkouki; 11-21-2011 at 09:53 AM..

11-07-2011, 12:29 PM	#10
rastaman Zilvia Addict Join Date: Apr 2009 Location: Fl. Posts: 708 Trader Rating: (1) Feedback Score: 1 reviews	nice i need one of these soon

11-14-2011, 12:03 PM	#11
Slidin' Sam Zilvia Addict Join Date: Jul 2009 Location: Japan Posts: 729 Trader Rating: (9) Feedback Score: 9 reviews	"mewantkouki" is correct. Look at the head for indication of what engine it is. You can run either ecu, wc (zenki) or na (kouki), just as long as you use the corresponding harness, ie, wc ecu w/ wc harness. You can change the harness from kouki to zenki without problems (maf, cas, etc). Kouki s14 comes with a different turbine though. It is the same as s15 except it does not have a divided exhaust housing. __________________

01-24-2012, 02:12 AM	#15
Shift n Drift Zilvia Junkie Join Date: May 2008 Location: Ohio Age: 32 Posts: 511 Trader Rating: (12) Feedback Score: 12 reviews	this is the kouki harness plug and works with NA ecu zenki is wider and works with WC ecu, and only uses 22680-68f00 maf if your building it and need something, i got this power fc with commander and kouki harness wired for s13 for 700 shipped

06-13-2014, 06:05 AM	#16
maces13 Leaky Injector Join Date: May 2013 Location: Largo Age: 30 Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	I hate posting on old threads but this was some good info that I'm sure some people don't know

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