Okay so don't bash me for this thread, I know there's a thread about this from 5 years ago but that was when uprev was in the initial stages.

I have a 2003 350z stock motor (plenum spacer, hfc, exhaust) and I have incoming a greddy 18g tt kit with fmic

I am going to be running 570cc plug and play r35 injectors and 1 step colder ngk plugs. Power goals are high 300 low 400hp.

I emailed a couple of tuners in the nj/tri state area and everyone except for one shop said that uprev is without a doubt a better engine management solution for boosted cars.

My research has gathered that utec has over boost and knock protection and uprev doesn't. Uprev however, ran smoother etc.

I was able to get utec for 250 and I could just have it tuned with that (600) = 850

Or
With uprev I need maf 350, license I've heard 300-500 and tune 600-800~$1200-1650

What new features does uprev have now that 3 out of 4 tuners said its marginally superior that it didn't have 4-5 years ago when utec was still on top of its game.

Please try to drop some facts and not to turn this into a fanboy war.

 

I have used both utec and uprev. My TT G35 started with utec then I later swapped it with uprev due to some issues with utec not getting along with the car (random CELs and limp modes). Uprev is a little smoother going in and out of boost but the performance is identical minus the protections.

I also have a TT '03 350z (greddy 18G) with utec and it runs like a top. Never any CEL issues at all and it's pretty smooth in and out of boost. I considered swapping for uprev but the extra protections on a 130kmi boosted VQ is not something I want to lose.

From my experience, UTEC will have issues with injector sizes above 440CC making it near impossible to get the tune correct in vacuum. If you are running anything bigger, go uprev (or both).

 

Also just FYI for those power levels you do not need the Uprev MAF, also if you're paying $800 for the tune that should include the $300 license fee

 

Yes I've seen your name before in the previous posts about this topic. Where did you have your car tuned if you don't mind me asking ? My car has 120k. I'm running 570cc injectors on a stock block. I'm kind of stuck on what I should do to be honest. Then TXS doesn't support utec anymore. It's already on its way but I could always sell it.

What would you do in my shoes ? The tuner for utec is pretty comfortable tuning with 600 cc injectors as that's what he recommended.

 

You are just boosting her at 120k? I would def not do it at that mileage. Not saying it is a lot, but I think it is for boosting. A friend has a g that tried boosting at that mileage and popped 5k later. Every motor is different. GL.

 

120k highway miles man lol jk. Yeah well if it does then I'll just build it. It's not my daily driver anyway.

 

Well as long as you're prepared and if its not a DD oh well. Just downtime sucks.

 

Is it your daily driver ? How many miles you got ?

 

I hope this statement doesn't come bite me in the *** but I've taken meticulous care of my car and it's rare that it sees over 3k. I think I'll be okay despite the mileage especially with a really good tune

 

I just get the sense that tuners like UpRev because it puts more money in their pocket.

 

One tuner is encouraging to use utec to be most cost effective and the other is charging me the same price for dyno tuning and install I just need an mafs (350) and license fee (300) from uprev so I'm not sure they're making much more money aside from the tune.

 

They make money per license they sell. IF you already have a utec they make $0 off it. Plus they sucker you into an upgraded maf which means they sell it to you with margin.

Then...when you need to tweak something you have to go back to them for work since they have your "cable and file" vs a utec you can plug into with your laptop and usb printer style cable.

 

I am leaning on doing the tune with my utec since I already have it. Is that what you have ? What would you do in my shoes ?

 

Not my DD. She was boosted at 59k miles and just rolled 96k. Compression test went perfect all across and she's still strong.

 

Yeah he suggested to do a compression/leak down test but he wasn't concerned. What engine management are you using ?

 

Turbonetics techno square reflash and tuned by AAM.

 

the UTEC will scale 600cc injectors in vaccum just fine. I'd stay with the UTEC. simple to use and works well enough.

 

Yes, Thanks man. I've also been leaning towards that decision.

 

I had Utec that I tuned NA. Now my car is supercharged and I run Uprev. Utec knock protection won't do any good for you unless you listen to the knock with headphones and adjust the sensitivity accordingly. You can also log knock count with Uprev. I'm not sure if it will send you to high det map if it encounters enough knock. I wouldn't count on it.

My opinion is that although the Utec interface isn't as pretty it was easy to tune. Although if I would have been FI it could have been different.

Uprev has been a bit of a challenge, but I think it's because of the fuel pressure issues I've been having so I can't yet comment on that one. I do like that in Uprev you can easily datalog to .csv and analyse the collected data.
I was first worried about finding the right K-value but it turned out to be easy.

If you are tuning it by yourself you should get a wideband. Preferably an LC-1 if you ever decide to go with Uprev. Although tuner wideband would be ideal for Utec.

With a bigger maf tube and 40kohm resistor the OEM maf should be sufficent.
https://my350z.com/forum/tuning/5921...ing-uprev.html

EDIT: Got my fuel pressure problem solved and tuning seems just as simple with uprev.
EDIT2: Real time tuning of uprev is great if you have compatible ecu. If you don't you are just **** out of luck like me.