I just purchased the osiris tuner package and i'm confused on the software. I've been reading through the manual and it just gets more and more confusing as I go.

Here are some pictures i snagged from another thread. I have circled numbers in red, blue, and pink and i'm wondering what those values represent. It doesn't say what their value means or anything in the manual so i'm a little confused.

One of those is the top tuning. It's tuned RPM verses what? Those numbers don't look like maf voltages and they don't look like MAF values....so what are they?

I've been tuning with innovate datalogger and ss box so this new software is a little confusing to me. Maybe it will be more clear when I get my ROM from uprev. I just need a decent map setup to get me down to Injected performance. I also would like to know how to adjust things on here so i can change my tune later if need be.

Is there a better set of instructions somewhere that explains what each value is? The manual just keeps saying to adjust the K multiplier then log it and adjust and log.

 

Contact Jared at UpRev.

 

He answered a bunch of my questions in another thread. I was trying to get the answer on the boards verses email just in case someone else was curious about it also. more public knowledge so Jared doesn't have to answer the same email over and over.

 

Alright, I'll take a wack at it. I've been tuning my TT G35 with Osiris for about a year now.

The first picture, the numbers circled in red, that is called Base Fuel Schedule. It is a theoretical fuel injector puslewidth based on cerntain environmental factors. If the factors were whatever standard the pronoun people that programmed the ecu chose, this value would be the injector on time in milliseconds. This value is the ECU uses to reference a load point through the fuel and timing maps. I believe it is created by MAF voltage, K fuel multiplier, the temp compensation table, and I'm sure there are some more multiplier tables working on it too.

Circled in blue is the "Time for max burn pressure" I think it's called. Instead of using an actual BTDC timing value, Nissan uses a time value before max pressure to attempt to align the max cylinder pressure up with its most effective crankshaft position, usually 14-15* ATDC if I recall correctly.

The second picture, circled in pink is the fuel compensation table. By my adjusting this table, it seems to effect air fuel ratio based on RPM and throttle position. If you have a lean spot at 2000RPM and only one spot through the range of the throttle, you can tune it out with this table.

Of course, this is all what I have learned by trial and error, so it may not be entirely accurate, but this is how I have been treating such tables and I haven't popped the engine yet.

Hope this helps.

 

thanks! that does help.

I think part of the confusion is that i haven't gotten my base ROM yet to start looking at this. I'm sure once i put the rom on and watch cipher logs i'll understand better what this stuff is using.

did you use an upgraded PMAS with your TT?

I'm also thinking of using the SS box to tune for boost up past 0psi. Have you done something like that?

 

Your fuel target under base fuel schedule is the AFR the ecu will try and maintain if do you not change this and try to tune the car you will have a headache. It happend to me. I spent an hour trying to figure out why it wouldn't change the afr. LowDet Timeing maps are for your timing. As the earlier post said nissan does not use "regular" timing numbers.


This is from jared to me.

Base fuel schedule is how Nissan measures the engine load on a bunch of the tables. It's an injector pulse width value. It's the pulse width that the ECU would have to run to maintain a stoich air to fuel ratio based on it's algorithms. So really if you're targeting something other than stoich (which you always are under heavy loads & WOT) it's a theoretical pulse width, not the actual pulse width under those conditions.

In RTT there are quite a few naming inconsistencies (which is why it's not released).
Timing A+B = Low det timing table (the one the ECU should normally be running in).
Timing C = High det timing table (the one it switches to if something is wrong).
Injector scale = K fuel multiplier.
Fuel = AFR Targets.
Fuel Correction = Fuel compensation.

 

Yes, I use a PMAS.

When you get to the point that you max out the stock MAS, you basically hit it's maximum voltage output. The PMAS is rescaled to meter air to a much higher flow rate. So where the stock MAS is sending 5V to the ECU, the PMAS may only show the ECU 2.5V with 2.5V to go. These numbers are notional and used for example only, I don't know what the exact value would be.

Using the PMAS, you reconfigure the MAS Compensation table to change the actual BSF that the ECU comes up with in its calculations. You would also rescale the injectors with the K value and this also changes the BSF.

Now you can go into your fuel table and richen up the BSF columns that are in boost, and go to the timing tables, and remove timing in the same areas so the ECU sees boost as higher load, as it is, and adjusts the fuel and timing as needed.

Additional piggy back controllers for fuel or timing are not needed, and I don't suggest them at all. The factory ECU does a great job, even with boost, when tuned properly.

 

thanks for the input guys.

I'll probably have a lot of questions with these tables once i start running this on the car.

 

Binder, where did u get the manual from???? i've upgraded to Tuner version now, and i'm lost too..

version i'm running is 1.0.3509.18975 (downloaded recently from uprev website).. what version you running?

cuz on the screenshots you've attached, the version is a little different (1.0.3580.xxx), which looks like a newer version.

how are you getting along with it tho?

 

ROM editor: 1.0.3580.36259

use the "software updated" from the uprev folder in the start menu to update the software. I use the osiris manual that installed when i downloaded the ROM editor. I think they are about to release a new version that is better but i don't see a link for it on the page anywhere yet.

well, i had it tuned ok before i moved off to med school. I have to install my RFS, pmas, and 800cc injectors and i'll have to retune it somewhat to get it running. Sometime in april i'm going to have it dyno tuned at GRD (chicago) or Injected (lexington). I know hal is a great tuner and i'd like to go to him but my budget is very limited due to school. The amount i have set aside for the tune is all i'm going to have which will cut it close for Hal to tune. I'll have leftover if GRD tunes it. I've heard good about Tuan at GRD so i might do that to get a decent tune on it then have Hal redo everything when i'm out of school and switch to a turbo setup.

I'll always make some tweaks on osiris myself, but i want a great base tune from a dyno. Mostly for the timing tune.

 

Good luck with that... hope it turns out well for you. so i've heard, Hal is really good at tuning, i think u might wanna try to squeeze a bit more for him to do it.

anyways, i've done software update, still says nothing to download and i'm up to date.!

and when you said you downloaded the ROM Editor, you actually downloaded the OsirisTunerInstaller.exe, right? cuz i can't find ROM Editor by itself on their website.

i'm trying to learn how to tune with Osiris, i know it's gonna take alot of time and effort, but i'm gonna try to stick to my goals.

 

osiristunerinstaller is what i used. It says "osiris tuner v2.0 installer". I also have cipherRTT (real time tune) installed so i'm not sure if that changes anything on the edition.

it's confusing to figure out the software but overall it's not that bad once you get down to it. It took me a while to learn it since i was using R4 before this and it's way different. I do'nt know "how to tune" the osiris by any means but i setup a pretty decent base tune on my car that is safe a/f and safe timing based on my logs. The car starts without giving it gas and idles perfectly so i would say overall it is good enough to get it to a tuner.

The thing with going for Hal is that my tune for the vortech really isn't going to be that wild and once i'm out of med school i'll be switching over to a pretty wild turbo setup to match my built engine that i already have. Once that happens i'll need it setup perfectly. A great "base" tune for all around use right now is all i'm wanting someone to do. It's a whole different story verses "saving" for something and having ZERO income. It's a whole different ballgame in med school than full time college. I worked 70hrs a week at the hospital and was taking 18credit hours to finish my bach degree with plenty of free time. Definitely not the case in med school.

 

Tuning with Osiris compared to the Haltech is like comparing Cod liver oil to orange juice. They both may be good for you but one goes down a whole lot easier. This thread has good info in it! Osiris is definitely an acquired taste, but once you get used to it, it's not that bad. If you have some OJ sitting on the shelf, it's hard to go back though (sorry I'm spoiled by the Haltech now and dialed in Osiris only for passing emissions).

 

Just downloaded the latest version off their website.. version 1.0.3699.25760. i can see they've added the Living Tuning button in the Rom Editor instead of through Cipher.

I don't know how you got CipherRTT, but i don't seems to get it even with the latest download (i'm sure tho that it should be the same as Live Tuning).

Good luck on your career, binder. i'm sure you're doing good already (taking 18credits aint easy!!!)..

 

CipherRTT requires a special license file I believe in order to activate.

 

i never knew there's a special license for RTT... hmmm, i just paid $200 to upgrade from standard to tuner version, and i was advised to download the installer from their website.

binder, how did u get access to that?

 

I would take it to e-mail with UpRev - you might only have to ask for it...

 

Uprev blows with their customer service and replying on emails.. i had to do the upgrade through Vince "R/T Tuning"..

i'll drop him a line and see if knows about it.

 

ah damn it guys....slow down with the responses. Thankfully i have a few minutes for lunch today.

first: 18 hours was in undergrad. med school is 33hrs this trimester. a level of it's own!

Ok, so they've updated the rom editor then. If they already have live tune in the rom editor then that's the newest version. Cipher RTT was a beta file that did live tune through cipher until they put a new version of the Rom editor out. That means I need to go download the newest version since i'm still using the Cipher RTT. You have the newest version.

So you can't find cipherRTT anymore because it doesn't exsist anymore.

RC: i've looked through all the haltech logger and editor. It looks nice and easy to use. Osiris is confusing to use but it works great for all my purposes. When i get into practice and go wild i'll put a haltech into my car and just do minor things like speed limiter with my osiris.

 

Lots of power in the stock ECU, no question... just takes getting used to how things are organized. Going to the Haltech from Osiris is really easy - you honestly won't need any kind of tutorial or manual. Everything just is exactly as you'd expect and Hal is awesome for support if you ever do run into questions (not to mention the forums at forums.haltech.com).

Med school is just the beginning of a never ending life of study. You'll be taking exams the rest of your life so get used to it. Just pick something you really like for residency! There are of course a few perks when you finally get out, like what 8 yrs from now? And then your wife (yes, someone will have claimed you whether you like it or not!), will be spending your $$$. LOL.