I bought a used VQ35 engine he told me its from a 04 Z is there any way to tell for sure what year it is maybe by a serial number on the engine somewhere?

 

Non revup = 03-04 MT
Non revup = 03-06 AT
Revup = 05-06 MT
HR = 07-08 MT & AT

To the OP's question. It probably doesn't matter what 'year' the motor is (as long as it isn't an HR). Just do a compression check on it and general inspection and you should be fine.

 

I think it does matter what year I'm dropping this into my S13 and I need to use the ECU from the same year as the engine

 

Ahhh, since you're doing a conversion, you might wanna check this out.

https://my350z.com/forum/na-builds/350513-vq-powered-s14.html

FYI, The bottom ends are all the same. Only the heads changed from the non-revup to the revup. Not sure about the compatibility matrix for ECU's though...

 

Sorry to hijack your thread with a noob question but what's the difference between a non-revup & revup engine? As in is "revup" a bonus or a drawback, or just another way they made them?

 

ah thanks I actually saw that thread and talked to that guy a few times, mainly I'm concerned about the compatibility with the ECU I want to buy the correct ecu/bcm for the engine I have. The serial I pulled off the engine is 642503A-VQ35 if anyone can tell me what that means or what year I'd appreciate it

 

I think you'll need the vehicle's VIN in order to determine which year it was. . .

The difference between a non revup and a revup is the heads.

The revup has both intake and exhaust cam timing, a higher redline, higher horsepower but less torque. You can tell by looking at the heads, you'll see 2 sets of circles on the front of each head where the cams are. CR, bore and stroke are the same for both engines.

Non rev ups have a single circle on each of the heads. . .

Determine which engine you have first, then get the matching ecu. . .

not sure if you could use a revup ecu on a non revup vq without throwing codes. . .

 

Pretty sure its a non-revup so its a 03 or 04? I just didn't know if I could use 03 or 04 ecu or not or if it had to be the same exact year as the engine. I won't be able to get the vechile VIN it was pulled from a wrecked Z and I bought it off someone second hand.

 

^^ yep that's a non-revup, just need an ecu for that type. . .

man i've got to clean up my engine bay. . .yours is looking good!

 

Ok great...the guy I bought the car from pressure washed the engine bay and underbody

 

the year doesnt matter, you just need to get an ECU for a non revup z and it will work

 

the ecu, bcm, and nats have to all match up though right?

 

^^^ Correct.

 

What's a BCM? (Not brake master cylinder obviously!)

Also matching these up doesn't apply to aftermarket standalone ECUs like the Haltech, right?

 

Body control module

 

What does that do do you mind me asking?

 

I own an 05 mt in a base model and it is a Non revup motor.

 

It does everything that the ECU doesn't do:
Windows
Locks
ABS
TCS
Cruise
Climate
Anti Theft
etc...

 

You should have another look. If you truly have a non-revup in an 05, then you don't have MT, you'll be AT.

Dat's jus how Nissan rolls yo.

Here's what they look like:

 

More than the heads changed -- the non-RevUp ECU will throw ABS codes when left-foot-braking. The RevUp ECU does not.