I'm doing a lot of studying and see that "supposedly" the 2003-2004 ECU does not read wideband but the 2004.5+ does. Now after looking at a bunch of ECU pins there all the same style just different pins in certain locations. I'm starting to bleave that a 2004.5-2005 ECU will work on a 2003 when you pin the ECU for wideband. Possibly even using my original 2003 ECU as it looks the same at the 2004.5 - 5 before rev-up. What could have changed to make it not read wideband but the ECU looks the same? Why can't someone just buy a link g4+ and wire the harness to wide band to the linkG4+ and call it a day and finally get rid of this curse of the narrows? I mean the narrow has 4 wires and the wide has 5.
pins 2, 75, 35, 16, 56 bank1------- pins 24, 77, 57, 76, 58 bank2...... Makes no sense to me why this can't be done with a 2003-2005 ECU or even a standalone. If anyone has a answer lmk I'm tired of reading every night nonstop about this and not finding anyone who did this I did find a guy who had a older 2003 the untuneable kind and he did a engine swap and harness and made it tuneable it was plug and play even got the electric fans vs. his clutch type.

 

I dont think they work interchangably … I’m dealing with / dealt with this exact issue on the twin (clone - not turbo) z … the previous owner messed up the ecu and put a wideband-enabled ecu in the car and it did not work.

I did purchase a G4+ back a few years ago and wired in widebands. I believe I used the same o2 signal pins (Id have to go back and look) but the easier (non-CAN) way to do it is to have independent wideband controllers, you’d hook up your sensors, power, and ground them through the controllers and then simply send a 0-5v signal to the ECU. I also did this on my piggy-back haltech before I jumped to Link.

Here’s my build thread through the years … enjoy

https://my350z.com/forum/forced-indu...ispreloading=1

 

Lol what's funny is ic actually read this. Good build yeah I was thinking along the lines of swapping ECU to wide band plus doing the pins. I don't think it would be to hard. It's hard to find info anymore because alot of the threads are 7+ years old. Then again I'm 30+ years old and got my first z at 17 so I guess I'm out dated lol.

 

I dont have conclusive evidence that the ECU’s are or are not compatible but I am leaning towards that they are not - nissan is goofy like that.

If you want a project to see if it’s possibly than knock yourself out. You may inflict damage to the ECU, the engine, and/or the car so be ready for a complete loss of any one component.

If you want results than just put a independent wideband in the car and call it good.

Whats the purpose of installing widebands? Are you turbo’d/Supercharged that you need the data?

40, first z in 2005, owned seven z/g/q chassis since … nah, if Old Man Z is still kicking than were all young-blood

 

Old man z was here before I got my first Z and his super charger setup was wild he is actually the one I read so so much about. Start reading these threads back in 2012 when I got my 2005 350z god time flys.
Personally love my g35 and Im extremely familiar with the vq35de engine so I kind of stick to it now when buying cars are I know the in's and out's of it. Think I want to buy a fx35 for my soccer mom car. Plus I love the fact now that parts are getting cheap and you can find a engine with ease now for under $2000. They turned into the b16-18 of Hondas.

The only negative thing I can say is cars now these days smoke a g35 and 350z. Avarage car off the lot now has 300+whp and has 3400+/- weight.

 

Let us know how the NB to WB swap goes - interested to see the work and the results

Parts are plentify but finding good donor engines/cranks has been difficult (if you ask me).

Sure - 2020-era cars can beat 2000-era cars, but 2000-era cars can beat 1990-era cars … and 2030-era cars will beat 2020-era cars … cycle of life.

I really dont street race but I rarely lose - albeit I’d double their power and I’m 600-800lbs lighter … no one ever accused BMW drivers as being the sharpest tool in the box! Lol

 

No kidding they ain't the sharpest imagine buying a car for $45k and think you can beat every car on the road. Then all of a sudden a 1999 ek pulls up with an eBay turbo and about 5 grand invested and makes you stand still lmfao!!!!

Quite honestly once this engine blows I'm just going to LS swap it with the way technology is and how these cars are now with swapping there is no more pioneering for the price of a fully built block and a turbo kit you can full swap an LS3 and be at 430 horsepower with a bigger platform. It's amazing how far everything's come along.

 

I dont think people put enough emphasis on how weight can influence your acelleration.

But yea - a tune BMW is quick but it’s not ‘that’ quick…

Fastest car I’ve ever driven has been a K20 swapped Lotus Elise …

LS swaps have more ‘hidden’ cost that most people dont recognize going in … if you ask me LS swap vs. turbo’d DE will be about the same cost and around the same power. Built DE with a turbo kit will make more power and be less complicated than an NA LS … that’s just my opinion.

 

Also watch Hi/Lo on YouTube, it's a lot of money an quite frankly most boosted VQs are faster than LS swaps with the same power. This chassis wasn't made to put down the torque of a V8.