Wallrockets Datsun 620 (Sr20det round 2)

[WallRocket]

Exhaust!

Used a aftermarket S13 240sx exhaust, S13 240sx exhaust hanger bolted right up to the truck!

 

Just had to fab up a mid pipe, and elbow up the end of the S13 exhaust. Oh and make a custom down pipe because i clocked the turbo manifold. 

 

Stock S13 exhaust hanger bolted to datsun 620

 

elbow to 90 it up to fit into the truck.

 

2nd hanger, i had to do a little fab work to make bolt up. Pretty easy though.

[WallRocket]

Working on making some running vidoes. 

[carterb]

That was quite a post!  Great looking project.  Nice job working around all the issues as they popped up.

--carter

[WallRocket]

Start up video. I made a few more fore the exhaust and stuff

 

https://m.youtube.com/watch?v=Z7qnz6Y8rfM

[WallRocket]

That was quite a post!  Great looking project.  Nice job working around all the issues as they popped up.

--carter

 

Thanks man. I been on it all month! I am a pretty fast engine swap individual, but I like to do it neat and as correct as i can. So sometimes it slows me down quite a bit. This is around day 28 or so into the build. 

 

I have to take all this back out to paint the engine bay...that has been on my mind lately. haha.

[WallRocket]

Here is the shifter items that came in the mail the other day. 

 

Shifter extension, and nismo shift knob with 240sx rubber floor boot. 

[WallRocket]

Working on the fans today, and some neat headlight delete covers *because of my intercooler set up.

 

 

 

 

Oh, and fans..dah.

wiring, wiring, and more wiring. 

 

all neat and what not.

 

I usually use GM 2pin connectors but i was feeling lazy today. 

 

 

And the placement of two of my gauges. (Waiting for relays, and gauge holders)

[WallRocket]

Ok, so to brush up on some of the LOWER engine harness for people to help understand it more. 

 

Don't complicate this lower harness. Leave the SR20 lower harness nearly UNTOUCHED. Just pull the battery thick power cable from the lower harness and run it stock with out the battery positive cable in it. YOUR DATSUN LOWER HARNESS NEARLY PLUGS IN! Yep your heard right. I ran the OEM datsun starter wire, the OEM datsun charge light wire, and OEM datsun signal alternator wire! 

 

Just put male/female ends on the datsun side, and tap what ever wire you need. I used the 240sx pigtal to plug into the lower harness with out cutting it at all.  

Small white with red strip turns the alternator ON

Thick White single plug is the alternator CHARGE wire. 

I ran a wire from the post on the back of alternator to the starter (+) Then ran from starter (+) to my battery to a fuse off the battery. 

I use my sr20det oem charge wire for a power supply for my fans. =)

[mrbigtanker]

Dude your an animal. Great work and it sounds good.

[]2eDeYe]

Badass :cool:

[5t341tH]

awesome! do you necessarily have to lose the two inner lights with this swap? Does the IC pipes get in the way?

[WallRocket]

Thanks guys. I think do to xmas...my stuff is getting here slower then normal.

 

Unfortunately, yes. The headlights have to be removed for the midmount intercooler set up. I did my research on this subject, and it's the best place for a intercooler on this truck in my option. I do plan to run a headlight that has high and low beam into one unit and hid. (Thinking bmw?)

 

I made the delete panels. They look cool i think. To fasten them, I think I will just drill 2 holes each and bolt them to the grill.

[WallRocket]

I cut up my datsun 620 driveshaft *which was only 1in or so to long to bolt right up into the truck!

Seems they have the same spline

 

 

My friend picked up a Datsun 280z but its needing a TON of rust repair.

[WallRocket]

Here is my last 280z i built from ground up!

 

 

It had a 1jzgte with a single gt40 turbo

[WallRocket]

Now...to flare the truck or not to flare the truck..hmm. 

[mrbigtanker]

Now...to flare the truck or not to flare the truck..hmm.

 

Up to you but no flares.

[WallRocket]

Haha, i did not notice it was a APEXI exhaust i cut up. OOPS

 

 

 

Put on a rub guard so the wire harness doesn't catch on fire rubbing threw the firewall. I seen a picture of a Datsun 620 that cough on fire, now i am all over mine to double make sure its good. 

 

 

 

 

Once again, my lazy wiring strikes again. I ran out of GM 4pins, had to use 3pins for my relay for my fans and gauges!

 

I guess from moving from the Nissan 240sx, to my truck the wind band 02 sensor went out. Thats my luck!

 

I STILL don't have my gauge pod holders..so for wiring reasons, i tapped them where i want them so i can finish wiring this truck. ignore that charge light. haha.

 

[WallRocket]

Oh and my steel braided turbo coolant lines are leaking =(

 

BUT driveshaft is out being made! Should be finished in 1 week.

[racerx]

Flare

[WallRocket]

Just drill a little hole and a few self tappers. 

 

New emblem...well new to me. I am going to refinish it of course. I like the yellow in it. 

 

 

This front is looking sexy. 

 

[]2eDeYe]

 

 

What exactly is going on here? Mounting the  grey plates? 

[d.p]

Looks like a headlight ring to me.

[WallRocket]

Yea. I just drilled 3 little holes into them and screwed them to the grill. 

 

 

Anyways. Here is my long waited driveshaft! It was only $300 with new U-Joints! 

 

 

 

 

Crap air filter for now. This required losing the horns/relocating horns.

 

 

 

AND...COOLANT LEAKS EVERYWHERE. lol

One under the intake

 

and one turbo coolant line leaking. 

 

And..back together, waiting for new line supplies to make a new line for the turbo.

 

 

So the truck is waiting one 1 line, hood pins, and some gauge holders to be back on the road. This will make it a 2 month long swap. Most of it was waiting on parts unfortunately. 

[WallRocket]

 

Battery box installed

 

I got some cheap hood pins until i get some areolatch style hood pins.

 

It actually made it about 1 mile drive to my work =) I made a video, but i will see how well it came out before i post it. 

[WallRocket]

I have had a few people been asking about my wiring. Its just the way I did it, i am not liable if it doesn't work out for you. 

 

 

This is for the gauges. Simply tap what you want and run it to desired gauge. 

(My truck, i didn't use any of these wires.)

 

These wires are located by the ECU, and are usually white or brown plug. The way I wired my truck, i didn't use any of these wires, just thought they would be helpful to some. 

 

Here is what you will be looking for, for above wire colors. Usually a white or brown flat plug. S13 Nissan 240sx guys use the term, "Dash interface plug" IGNORE THE WIRE COLORS IN PICTURES. 

 

 

Brown is a DOHC chassis dash interface

 

White is a SOHC chassis dash interface

 

 

First Step 1. 

Now, you have a 3 pin O2 sensor plug, it needs to be extended about 4 inches on either side (you choose) This plug will have a BROWN/Yellow, BROWN, and WHITE wire.

Here is what the O2 sensor wire looks like. 

 

 

Second Step 2.

You will need to extend the MAF wire. This will have a shield loom signal wires (2) dont be scared of that. Find a nissan 240sx OEM harness and cut the MAF wires from it (or any 2 wire shielded MAF wire from any car really) There will be 3 wires, Black, white, and black white stripe, just extend them 3ft, yes, 3ft. So the maf wire can run across the fire wall and around to the driver front of the truck. 

 

SR WIRE COLOR FUNCTION 

Black / White +12V (Power)

Black MAF Ground

White MAF Signal

 

 

I used a Z32 maf sensor. 

FOR Z32 MAF USERS, THE PINOUT IS: (ECU retune is required)

 

 

Third Step 3. 

Cut and put power where it needs to go into the OEM sr harness. No need to cut open the harness, etc etc. Just cut the power interface pigtail off. Here is what the power interface plug looks like. (See Figure 1a. below) Now that you have cut the pigtail off, you will see a few wires you need to run the sr20det in your truck, Thick blue/red stripe, Thick Black/Red stripe, Red, brown, black/yellow stripe, Black/White stripe, red/black stripe See figure 1b. You don't need any other colors! You will need to wire in 2 or 3 Relays in the location of the passenger side/center cab of truck.. I can't explain how to wire in a relay, but i am sure you can figure it out.

 

 

 

Figure 1a.

 

Figure 1b.

SR Wire Color

 

ECU Relay --- Red / Black stripe 12v Switch Power --- Wire to Relay 1 12v Switched

ECU Power ---Black / White stripe 12v Switched Power ---Wire to Relay 1 12v Switched

ECU backup power --- Red 12v Switched Power Relay 1 12v switched

 

Main ignition power

Black / Red
Blue / Red Connect Wires together. 12v switched/Relay 2 12v Switched

 

Brown Any +12V Switched O2 sensor power

Black / Yellow stripe Any +12V Switched Idle air control solenoid power

 

Black / Pink stripe Not Used. Fuel pump relay

Green / Orange stripe Not Used. Transmission neutral switch

Green / Yellow stripe Not Used. AC relay

Blue / Green stripe Not Used. AC relay

 

 

          

 

 

Here is the "Relay panel i fabricated up" You can do it how ever you wish, just make sure they are FUSED, and have power supply off a relay. 

 

 

ROUTING IN THE ENGINE BAY

(Update later with pictures of the routing i choose)

Requires cutting hole bigger and some sort of rubber grommets to prevent the sheet metal from rubbing threw the harness on fire wall. Runs as it would in the Nissan 240sx, ecu mounts to the kick panel of truck, and the power interface wires run any where into cab you wish, i ran mine to the center console. 

 

Gauges!

Water Temp

Tap and drill OEM water neck for sending unit. Then run wire to your gauge of your choice. 

 

 

 

 

Tachometer

You will find that the oem dash interface wire WILL not output a aftermarket gauge signal wire. (It did this for me anyways)

You will need to TAP PIN number 30

 

I haven't got to the Speedometer as of right now. 

 

 

NOW! YOU HAVE A UPPER HARNESS THAT WILL RUN THE SR20DET!

 

 

*****I will brush up on the LOWER harness later on.****** 

Its pretty Simple.

Remove thick starter wire, and loom back up. 

Plug in the OEM sr20 lower harness into the trucks OEM harness. 

 

1. Starter wire, just plug trucks starter wire into sr pigtail sr lower harness, no need to cut open lower harness, just tap what you want off the sr pigtails. 

2. Alternator, Thick (+) Terminal to starter (+) Terminal. Then just 12v switch the white with red stripe wire.