I'm preparing to install a MD 5/16" plenum spacer as well as a 350Z tube & Stillen intake. This may have been asked before but I wanted an opinion on if it would be smart to get a tune afterwards (or resetting ECU). I've never done this before and want to get the most I can out of these two mods but if it would be a waste of money I'd rather not. From my understanding a tune will help the car "read" the mods better?

 

I'd save it until you have more bolt-on mods. Maybe do an ECU reset for those mods.

 

Okay the only other thing I plan on doing is exhaust but not until I find what Im looking for (Nismo/Fuji) besides that nothing else really I plan on staying N/A. I live in CA so we can't do a lot that's why I am selling my AEM intake. Is a ECU reset something that can be done yourself or do you have to go to a shop for that?

 

https://g35driver.com/forums/engine-...-easy-way.html

 

Thanks man

 

Those two mods will not do enough to warrant any kind of ECU re-tune. And you will probably get as much out of them just putting them on as they are going to give you. I know that Cali jerks everyone around in the name of saving the planet but one of these days they are going to finally figure out that the haze you see there isn't coming from Cali - it's coming from your neighbors across the pond. And until those countries clean up their act, you're going to keep paying for it.

 

Totally agree with ya there on the Cali thing. It doesn't make sense to hold us to such tight standards when there are countries in the world doing much worse. One day I will leave this state with my G so I can really start modding to see her true potential and not have to deal with this BS!

 

Or just turn it into a dedicated track car.

 

Being my only car DD probably wouldn't be such a good idea. Also have automatic transmission as you can see so I'm going for stealth/sleeper performance mods. Next on my list sound system, then hopefully wheels/suspension soon after. Although I must say that I still love the look of my 19" rays still

 

Look into a differential swap, the vehicle will be significantly faster with the 3.9 but your highway rpm will be fairly high. This will be your number one go-fast mod that's still budget friendly.

Couple it with the TransGo shift kit for a very fun auto tranny experience.

https://www.z1motorsports.com/upload...GearRatios.pdf

 

Thanks! I've been looking for ways to reduce lag and just make shifting feel smoother. I've heard of the Transgo shift kit and it was on my list of future plans. As well as the 3.7 gear ratio, but not the 3.9. Is the differential swap something that can be done yourself (with proper tools) or it is better in the hands of a professional? Not asking for what it all entails (going to research that) just want to know if it's something I need to bring my car into a shop would rather avoid labor costs if possible.

 

Pumpkin swaps are pretty straight forward...mostly a bunch of pb blaster and getting things out of the way. Would recommend upgrading to poly diff bushings and greasing those axles while you're tackling that job...might take a bit longer and a few more curse words..but worth it.


https://g35driver.com/forums/engine-...pkin-swap.html
http://www.drifticon.com/350z-whitel...shing-install/

 

Diff swap is super easy, look up a video on people doing the rear differential bushing and you'll see. Basically you remove the muffler, unbolt drive axles and driveshaft, wheel speed sensors, then it's ready to come out. Weighs like #100 so use the service Jack to get it out by yourself, easy 1 man job.

 

And the diff swap will accomplish smoother shifting? Or just better acceleration? Not really looking to get crazy horsepower numbers I'm not a speed demon. My car is also very young (60k miles) and want to keep it as long as I can. I read that throwing a 3.7 diff on it will decrease engine life... is this true?

 

Technically yes because your engine will be at a higher cruising rpm but nearly everyone agrees this is one of the biggest performance improvements on a NA build. There's a few threads on diff swaps that you can read through to get an idea what to expect.