Thread: Osiris / UpRev end user ECU reflashing

Taken from specvboard, bosted by Big J. You have to register to view, so i'll just post up the info here

http://www.thespecvboard.com/Forum/v...p?f=107&t=3538

we'll start with the ROM Editor program. It's not a live editing program, meaning you make changes to the ROM to save or flash. The ROM editor will interface with Real Time Tuning found in the Cipher program, so you can open and then save a MAP you tweaked in RTT, or open it and continue tuning.

This is the home screen for the ROM Editor program in the Osiris Software bundle.



notice all the menus; fuel, timing, limits, etc. as the pics progress it will go though the sub menus and graphical MAP of the main menus and sub menus.



Under FUEL are:

individual cylinder trim... very important for high HP applications where a 3-5% variance in fueling between cylinders can mean the difference between going fast and going boom.... kinda advanced, but there.

injector latency... this is a big issue for accurate fueling...... even if 2 injectors are "440cc/min" but from different manufacturers, they will likely have different latency times. Latency is simply a measurement of delay. The delay is there because of the metal "plunger" in the injector that has to open and close for fuel to spray, it has weight so it's not instant, there is some delay. So if one injector "plunger" weighs XX and the coil provides xx force to move the plunger, an injector from a different manufacturer will spec out differently. When you throw a different injector in a QR, the ECU will compensate for size, but not the latency value. Because at different voltages a different amount of electromagnetic force is applied to the "plunger" at different voltages the latency isn't the same even for the exact same fuel injector. The system voltage for a car is never a set voltage, but rather a range, so when programing latency, you use the delay at several different voltages. Most injectors manufactures list latency, or you can find it on the internet for a specific injector. When a motor is spinning at 6000rpms, there are 50 intake strokes per cylinder happening per second, that's not much time, so you knda want to get the injector to fire at the right time by making sure the ECU compensates for latency.

K Fuel Multiplier... this is where it starts to get complicated. This is injector scaling, more or less. Not so much injector scaling but changing the constant of injector pulse width to a given MAF voltage or value. It takes some tweaking, but because they are directly related you can dial it in, and then do some math to recalculate the MAF table to a new K value and extend what the range of the factory MAF. If it seems complicated, remember this isn't an SAFC. (I'll go more into detail once I start actually tuning, and I'll reference the UpRev users guide to help explain it)





Fuel Compensation this is the dreaded "fuel trim" map more or less that causes drift, but, you lock it in. It's used to fine tune the variance after the injectors are scaled, or you can tune variance by changing the MAF tables. Once you get it dialed in the next MAP makes sense and works.

Air/Fuel Target map pretty straight forward, and pretty sweet, BUT you have to get the compensation tables right, injector scaling right, latency right. Notice how you could even tune for an AFR leaner than 14.7 while crusing if you wanted a little better fuel economy, or if you wanted to change it so the car would "go out of closed loop" sooner than 3000 rpms at WOT...... for say running high compression.......



This is the ignition timing map..... not directly timing, but time to peak pressure to place peak pressures at 15* ATDC..

There is no other device that will allow you to ADD more timing short of a standalone. You can also subtract timing for running high boost, etc. use caution, you are playing with serious stuff at this point.

Notice how this map says LOW DET..... this is the timing map the ECU uses when there is little to no detonation.... It will default to the high det map if there is enough detonation. BUT if you don't tune the HIGH DET map and you are det'ing on the LOW map and it defaults to the HIGH map, and the values are higher, you'll det worse.............. don't fuck up.

The factory ECU doesn't monitor detonation in the higher RPMs, past 5500 rpms is the number I've heard..... so again, don't fuck up.



if you don't like the 2D map view, most maps can be viewed as a 3D map also. This is the low det map in a 3D view.




this is pretty straight forward

speed limiter......... if you don't want the car to be able to go faster than 40mph, you can make it happen..... if you want to remove the limiter from a car (say an SE-R that is limited to 120ish) you can do that too.

Revlimiter (fuel cut) if you want the car to have a 7000rpm revlimit, simple, change the number to 7,000.

fuel restore...... this is the hysteresis, that's the fancy word for delay of an action between another action............. in this case because the fuel is cut off for a revlimiter on this motor, you have to tell it to turn back on. That's what this value is for.....

The cool thing is you can make the revlimit butter smooth by changing the gap between the fuel restore and fuel cut.


(this is why ECU tuning is so cool......... If you know that between shifts at WOT your RPMs drop to 4800, you could hold the gas to the floor between shifts, the car motor would cut fuel at your limit but not bounce, and say you set the fuel restore 5000rpms, when you grabbed the next gear the motor would power back on..... it would take some tweaking to get right, but you could do it)





this one is a little tough because none of the numbers correlate to anything.

Anyone with an SAFC or device that monitors throttle position knows that the throttle won't go 100% until about 2900rpms........... because not opening the throttle is used for torque management......... this table lets you tweak the throttle by wire tables so you can go WOT when you push the pedal down....... this should help the turbo guys spool a little sooner and give better throttle response down low.



this is important shit like the MAF table, whivh you can more or less use like an SAFC to fine tune things.

Also cold start enrichment.......... any turbo guy with big injectors knows that on a day when it below 40* when you first start the car it'll stumble for a second or two........ this table can fix that. Also when you scale for larger injectors, you will probably get hot start problems unless you tweak cold start enrichment tables.

idle targets.......... you know how when you start the car and the motor is cold it will idle higher the what the idle is set to? that what this table does, you can change it however you want.


ummm I'll have to read up on base fuel schedule table.



this is a list of every code the Spec V can pop (only part of the list is shown), if you notice next to each code it says "on", if you click it it can say "off" too, which means it will never pop on. Flip side is it may not set the readiness monitor either, IDK, some of the advanced guys know what readiness monitors are.



you can turn NATS on and off.........

You can turn ETC off. Electronic Throttle Control, which will give you 100% throttle correlation to the gas pedal, but it disables cruise control.

the then the utility functions, one is an injector latency calculator, the MAF function will let you load another MAF curve, the rest is RTT related.

I will be grabbing the Cipher soon to replace my usb scantool.

uprev is the way to go I gave dan the heads up about it I just hope he really looks into it.

This looks great

^-- that's what i said...there's no official 02/03 support from what i understand, because of a lack of interest

I was one of the first that tried it but it had a few bugs in it then. But now its up & running. If guys using safc need to jump on this ASAP.

Originally Posted by ash

^-- that's what i said...there's no official 02/03 support from what i understand, because of a lack of interest

well the problem is that not to guys step up & send them there ecu to get a base map for f/i. I sent them mine back then & they made sum headway getting a base map for F/I. I was willing to fly jahred out here to tune my car back then but moved on to the SS box.

Originally Posted by ash

^-- that's what i said...there's no official 02/03 support from what i understand, because of a lack of interest

It's actually because the 02-03 ECUs are completely different ECUs.

The 350Zs and G35s used the ECU the 2004+ Spec Vs do, the 02-03 Specs just got stuck w/ an odd ball box.

THe memory becomes unstable when those boxes are flashed w/ the current software........... it could be they would be willing to patch together a version, but as far as I know no Sentra guys are actually using it, aside From Mike Smith and myself..... and those were demo units.

This doesn't work for 02 spec? If it doesn't where can u get this at?

lol the post right above yours says it wont work w/ 02/03

The thing reminds me of the DSM link for the eclipses basically the same ish

This is the CVVT (cam timing table) from a VQ35. The CVVT table and tuning for the QR is the only function not up and running as of yet. UpRev needs a car in their shop in Austin, Tx to tweak out the CVVT tables. Most of the development for the QR was done over the phone and through E-mail....... which is quite a feat..... and also a total pain in the ass. They can't and won't do the CVVT tables that way.

There is a lot of potential in CVVT tuning when you get into wanting to run high compression on pump gas, or change turbo response and driveability. HUGE potential. This is the tuning system the QR needs to start doing big thing, both NA and turbo. It's the keys to the castle.

Once people start using the system base maps will show up.

Fuel maps for say modified stock injectors...... modified stock injectors will flow 700+ cc/min and are free to modify. Being able to download those base maps and flash them to an ECU will make things easier. Fuel maps for SRT-4 and WRX injectors, MAF sensor swap tables, etc. things will get easier and easier. Good tuning has always been the key.

It sucks that this won't work for the 02-03 Spec's. I wonder if it would work for the VQ Swaped Spec'V's though.

Our road race car is getting a VQ for next season....... you can bet we'll be using UpRev, even if we have to run a different years ECU or drop in a 350Z ecu.

Damn, how hard do you think it'll be to switch an 03 over to an 04 ecu

I've seen 2004+ harnesses on car-parts.com for $75, then you'd need an 04 maf, and an 04 ECU.

The boys @ Stay Tuned could probably whip the wiring together on the low and do it right

That'd be a good service for them to offer

does the 04 have that can system?? i was told my dash wouldnt work if i used an 04 harness and ecu, my car is a 01

i think the 04 ecu cant work on the 03

yea id have to get that 04 cluster, to make it easier, instead of doing crazy re-wiring

and that vin in the ecu, would be no good for us nyers when it comes for inspection, unless you got a connect.