Dohc to sohc sr chassis swap! Questions?? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SLiDe_WaYz · 10-17-2011, 05:53 PM

Hey guys, long story short I'll get straight to the point. I picked up another shell, sohc straight body, no rust, good paint. Vin number said DOHC, dash vin and firewall vin match. BUT the engine in the car was a SOHC, and the F4 plug in the dash is for a SOHC.

Now I swapped throttle cables with my old Dohc chassis, along with suspension, 5lug, brakes, gauges, ext. My wiring harness is from Yuri, from like 2005. No problems with it at all! My problem is the plug from the ecu that is suppose to plug into the F4 plug of course doesn't plug in since it's a white sohc plug and not a brown Dohc one.

With that said, what happens if I don't plug that in? What do I need to do in order for my fuel speedometer to work, and what would I need to do in order to get that plug to plug in !!? I know repin, but how I know the speedometer wouldn't work if I repin it with a Dohc plug!? I have no clue as to how to wire it up since I'm horrible with wiring. Hence why I have a wiring specialties wiring harness so I'm ny chasing gremlins in wires!

Someone! Some awesome Guru help me out! Tell me what to do! Because this is ALL I have left to do!

s13silvia123 · 10-17-2011, 07:48 PM

thats the dash plug swap with the brown plug, its color coded so it will be simple do it right though

SLiDe_WaYz · 10-17-2011, 07:57 PM

It's color coded do I basically cut one wire, and solder the same wire with the same color wire on the brown plug?

DS562 · 10-17-2011, 08:20 PM

here you are, good sir.

Yellow/Red –Tach
Yellow/Green–Speedometor
Orange–Ignition start
Black—Ground
Blue/Black—Water temp sensor

There will be some wires left over. These are for the SOHC’s diagnostic plug, and are unnecessary. Please note: Your car will NOT be able to hook up to a CONSULT tool.

2) Use a soldering iron to splice the wires together. It makes for a much cleaner job, and a cleaner electrical signal.

3) You need to swap out your tach if you want one that works. No wiring is involved, but it must be done. Simply pull your gauge cluster and remove the three screws behind the tach. Lift and separate. Replace.

source: KA24e to KA24de swap – Step-by-step

SLiDe_WaYz · 10-17-2011, 08:28 PM

LEGIT! I searched guess I didn't search hard enough. Thanks man!

Could I just put in a Dohc cluster and it work?

DS562 · 10-17-2011, 08:30 PM

yeah, the reason for the splicing is that the SOHC tach got signal from a different pin or something like that.

airman · 10-18-2011, 06:43 AM

Quote:

Originally Posted by DS562

yeah, the reason for the splicing is that the SOHC tach got signal from a different pin or something like that.

SOHC tach won't work with the DOHC at all.

SLiDe_WaYz · 10-18-2011, 10:19 AM

Quote:

Originally Posted by airman

SOHC tach won't work with the DOHC at all.

So I basically just repin those wires and swap tach's from the sohc cluster to a Dohc one?

If I'm not mistaken, doesn't one of those wires work as the fuel pump? To prime the fuel pump when the ignition is turned on?

Sileighty_85 · 10-18-2011, 11:05 AM

SR20DET Swap Engine Harness Wiring Diagram Guide SR SR20

SLiDe_WaYz · 10-18-2011, 05:57 PM

Quote:

Originally Posted by Sileighty_85

SR20DET Swap Engine Harness Wiring Diagram Guide SR SR20

That's simple, I was thinking I had to re pin all the damn wires

DS562 · 10-18-2011, 10:48 PM

wtf i couldve swore it said sohc TO dohc. i swear, im becoming dyslexic. my B.

10-17-2011, 05:53 PM	#1
SLiDe_WaYz Zilvia FREAK! Join Date: May 2011 Location: Texas Age: 31 Posts: 1,282 Trader Rating: (6) Feedback Score: 6 reviews	Dohc to sohc sr chassis swap! Questions?? Hey guys, long story short I'll get straight to the point. I picked up another shell, sohc straight body, no rust, good paint. Vin number said DOHC, dash vin and firewall vin match. BUT the engine in the car was a SOHC, and the F4 plug in the dash is for a SOHC. Now I swapped throttle cables with my old Dohc chassis, along with suspension, 5lug, brakes, gauges, ext. My wiring harness is from Yuri, from like 2005. No problems with it at all! My problem is the plug from the ecu that is suppose to plug into the F4 plug of course doesn't plug in since it's a white sohc plug and not a brown Dohc one. With that said, what happens if I don't plug that in? What do I need to do in order for my fuel speedometer to work, and what would I need to do in order to get that plug to plug in !!? I know repin, but how I know the speedometer wouldn't work if I repin it with a Dohc plug!? I have no clue as to how to wire it up since I'm horrible with wiring. Hence why I have a wiring specialties wiring harness so I'm ny chasing gremlins in wires! Someone! Some awesome Guru help me out! Tell me what to do! Because this is ALL I have left to do! __________________

10-17-2011, 07:48 PM	#2
s13silvia123 Post Whore! Join Date: May 2006 Location: where waldo is Age: 39 Posts: 3,256 Trader Rating: (16) Feedback Score: 16 reviews	thats the dash plug swap with the brown plug, its color coded so it will be simple do it right though __________________ 18g and 20g turbo users click on me http://zilvia.net/f/tech-talk/261219-18g-20g-turbo-users.html

10-17-2011, 07:57 PM	#3
SLiDe_WaYz Zilvia FREAK! Join Date: May 2011 Location: Texas Age: 31 Posts: 1,282 Trader Rating: (6) Feedback Score: 6 reviews	It's color coded do I basically cut one wire, and solder the same wire with the same color wire on the brown plug? __________________

10-17-2011, 08:20 PM	#4
DS562 Zilvia FREAK! Join Date: Apr 2010 Location: Norwalk 90650 Posts: 1,151 Trader Rating: (7) Feedback Score: 7 reviews	here you are, good sir. Yellow/Red –Tach Yellow/Green–Speedometor Orange–Ignition start Black—Ground Blue/Black—Water temp sensor There will be some wires left over. These are for the SOHC’s diagnostic plug, and are unnecessary. Please note: Your car will NOT be able to hook up to a CONSULT tool. 2) Use a soldering iron to splice the wires together. It makes for a much cleaner job, and a cleaner electrical signal. 3) You need to swap out your tach if you want one that works. No wiring is involved, but it must be done. Simply pull your gauge cluster and remove the three screws behind the tach. Lift and separate. Replace. source: KA24e to KA24de swap – Step-by-step __________________ Zeeeeeeeee32

10-17-2011, 08:28 PM	#5
SLiDe_WaYz Zilvia FREAK! Join Date: May 2011 Location: Texas Age: 31 Posts: 1,282 Trader Rating: (6) Feedback Score: 6 reviews	LEGIT! I searched guess I didn't search hard enough. Thanks man! Could I just put in a Dohc cluster and it work? __________________

10-17-2011, 08:30 PM	#6
DS562 Zilvia FREAK! Join Date: Apr 2010 Location: Norwalk 90650 Posts: 1,151 Trader Rating: (7) Feedback Score: 7 reviews	yeah, the reason for the splicing is that the SOHC tach got signal from a different pin or something like that. __________________ Zeeeeeeeee32

10-18-2011, 11:05 AM	#9
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	SR20DET Swap Engine Harness Wiring Diagram Guide SR SR20 __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

10-18-2011, 10:48 PM	#11
DS562 Zilvia FREAK! Join Date: Apr 2010 Location: Norwalk 90650 Posts: 1,151 Trader Rating: (7) Feedback Score: 7 reviews	wtf i couldve swore it said sohc TO dohc. i swear, im becoming dyslexic. my B. __________________ Zeeeeeeeee32

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode