dsastr_clan

hello friends,
i have a 300zx NA 90, and my motor just took a crap on me "rod knock" so im looking for another motor and i got a hold of this JDM engine for a very good price. Im thinking about placing an order this weekend but first i have started to do research on the swap and i can hardly find any info on this, i assume you may have to extend some of the wires from the wiring harness since the locations of some sensor may be different

but thats all the info that i have found, if any of you have done this swap or have extra info please hit me up and let me know. I have found also that the egr stuff is different.

adamvann3

Are you stuffing in another NA?

You can use all your usdm brackets off your current engine to make it the same, alt, power steering ect....

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88ss 368

dsastr_clan

yeah im gonna keep NA since is my daily driver, i have a secondary car which is my project car and i dont really wanna go all out on the Z i just wanna make it run good and be reliable for me, what concerns me is the wiring do u guys know if its pretty much plug and play or if i have do any mods like when you do an sr swap

Jsal32

To play it safe I would just transfer over all of the attaching components from the USDM engine onto the JDM long block and drop in.

Simple and straight forward. No wiring hassles or headaches to deal with.

FYI the 300zxclub forum has a plethora of info on these cars.

Good luck,

Jose

NoPistons!

There are almost no differences between the jdm and usdm variants of all vg series engines.

Um, just be sure to use the correct ecu/harness for the correct motor.

Dohc to dohc, sohc to sohc.

Turbo ecu will run on an n/a car. I wouldn't test to see if an na ecu will run on a turbo car. The harness plugs for the ecu's are identical for turbo and n/a variants of the same head type (dohc/sohc)


Hope that helps. Register on z31performance.com. Lots of good info on this stuff floating around on there. Not everyone there rocks a single cam either.

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Just another broke ass drifter

Jsal32

^^^Very true...

...but I think his question was leaning towards a Z32 not a Z31.

-Jose

dsastr_clan

well i decided to drop the thought of getting a jdm motor, im just gonna use that money to rebuild my current motor. i have a pic of what my problem was

1sicks13

i just finished swapping a 94-96 jdm na vg30de in a 90-93 z all you really have to do is put your usdm oil filter attachment on the jdm motor or extend the yellow wire to the driver side of the motor because the oil pressure sensor is on the driver side for jdm and pass. side for usdm i just extended the wire. then dor the brake booster you need to take the vacuum fitting from the pass side out clean it throw some new pipe thread tape on it take the 12mm but out of the drivers side intake and switch them. wires are all the same other than oil press. i think thats it hope this helps

kiko10

Hey man, i dnt wanna sound stupid LOL, bt how do u know when u have rod knock?? My z has been making this crazy knocking sound when i turn it on or when i accelelerate, it happened 5 months ago, i stopped using it just to be on the safe side. Thnx