Hey Fellow FI G owners.

So in a nut shell, I have an 03 G35 6mt Fully built Stage1 Engine, 700bb JWT Twin turbo ( Built by vinny ten racing) little over 23k on the build

It currently is running on the Split Second that came with the Kit. I have 550cc injectors and walboro 255 in tank fuel pump.

I was told If i upgrade to osiris and get larger injectors i could easily push over 750whp. I currently have three settings, 571whp,599whp,and 633whp.

I Just was wondering what you guys think. Is it worth Getting osiris? I had osiris on my previous NA g35 and loved it,but dont know about it with FI, i have researched the crap outa it and it seems like it is in fact a bada$$ program for high HP FI.

I also like that it utilizes the stock ecu instead of piggy backing off of it because id like it to clear my CEL thats thrown because of not having cats!.

Pros and cons please? Or other routes if you have any better ideas.

Its my daily driver btw.

Thanks in advance

 

 

I dont know what to say but wow!!! Your almost at 600. I would love to be in the 500 range for my DD.

 

I used Uprev to 435whp.... I upgraded to Haltech for 613whp now.

Is Uprev good? Yes for the most part.
Can it tune to 600whp???? Yes...
Should it........ Up to you... There ARE reasonably priced alternatives.

Such as my Haltech Plat Pro

 

go uprev

 

I ran 570whp for 20,000 miles tuned with Uprev. No issues with the tune whatsoever. 06 Coupe, built bottom end, GTM stage 2 kit. Had another friend with a 4.1L stroked 350z making 690 with Uprev.. again no issues. Uprev is light years ahead of a SS box...

 

thank you guys for the input,and kind words. I know it will handle the high HP, i just want to know what is the best for running safely,and dependable. I know the SS box only can be tuned A/F every 500rpm i believe,where UPREV can tune every 250rpm.

Since it is so vital for me to run a nice straight AF line,i just figured something else would work better.

I had osiris on my previous NA g35, i wish i woulda flashed it off my dam ecu before i sold it. I just have no clue how well it works with forced induction setups and tried to do as much research as i could,but if i can get first hand opinions id rather do that,so again thanks for the input and anymore is welcome and appreciated.

 

You can rescale the tables with uprev to tune however you want, focus in on certain areas if you want. I'd recommend picking up the tuner version cable and then just paying for the dyno time so you have access to the software yourself in case you need to tweak it later on...

Also if you're going to use uprev to tune over 400whp you're going to need an aftermarket MAF, Uprev and HPX are your only options

 

If I were switching setups right now, knowing how much supporting mods (license, the cable, the gauges, the boost controller, the upgraded MAF...) I'd take a really long, hard look at a used Haltech.

Uprev can manage- but before you make that commitment make damn sure you've got someone in your area who not only tunes it, but specializes in tuning it.

Also, price out all the above mentioned supporting mods before writing off Haltech as "too expensive."

 

Much appreciated.
I already have Upgraded MAF, Greddy digital Profec Boost controller, AEM A/F gauge, oil press gauge,Boost gauge.

I guess i didnt clarify correctly, i have had this setup for like 23k miles, but my AF gauge cruising ranges from 14-16 and when i am wide open its 11-13, so i was thinking with OSIRIS or something else thats more precise,i could get an even better tune that makes more more consistent AF lines.

Im content with my HP, i have a lightweight JWT flywheel and JWT clutch and i slip under full throttle already so i dont really need to go much higher. However i probably will buy a stage 3 or 4 clutch just to make sure it can handle it.

Anyone have any ideas on what clutch you prefer (only if you have used it with a high HP setup) and that will preferably work with the JWT flywheel if possible.

Thanks again!

 

If at WOT its hitting 13:1 that is absolutely too lean.

As for the clutch look into a twin disc, I recommend OS Giken then Exedy in that order. Os Giken comes with its own flywheel, not sure on the exedy.

 

at wide open its more like 11-12 it only goes to 13 when im starting to let off.

I was thinking of just buying a new pressure plate for the jwt clutch because they keep telling me it should easily handle 6-650 hp

Thank you very very much for your help my dude

 

Between 11-12ish is fine, I would not want to see it go over 12:1 in boost tho