Thread: Calum B13 RT v2, and TunerPro Q's

Was on the dyno today for the first time and tuned for WOT on a friends N1 cam bolt on VE. I have a few questions.

I have never touched tuning before and we only messed with fuel and added a little timing. We tuned up to 8K and had a pretty steady 13:1 when done at WOT. Temps were around 95 inside, got hot pretty quick and shut down often for cool downs.

1. We could not get the Innovate WB to input into the software. Calum has Analog inputs but i could not find where to see the readings. The ECU has 4 analog inputs, we connected it to 0.
A. Anyone know where these should show up?
B. Also would/can this log with the other data?

2. For the fuel map, some of the numbers were in the 190 range and others in higher RPM and Load dropped down closer to 0 and up to 60-70. A. Why the difference in numbers?
B. What is the normal range?
C. Is there a too high of number?

3. On the Timing map the numbers start at 15 then fan out and go up, but in the upper right corner for almost 1/4 of the map the numbers went to 100+, during tracing it even went into those cells at WOT.
A. Why the difference in those numbers?
B. What are some of you taking timing to?

I think thats it for now, i am going to do some more reading and look at some other bins to see what they are set at now i have an understanding of how some of these things work.

Subscribed.

190 range cells are O2 sensor feedback cells, 192 = 0. What happens is, it sees 192, assumes not to add any more fuel (since it's 0), but then listens to what the O2 sensor gives out, and starts adjusting the fuel based on that. If you were to loose your O2 sensor, the ECU wont have the O2 sensor to bounce against so it will stick to the numbers that you set. You will see 170-210 even in an OEM tune. 170 is the same as being -18, and 210 is the same as being 18.

60-70 at woot is fine, for NA it might be a little too high, what's your K value at and what maf?



128 +/- is once again feedback. This listens to the Knock sensor. 120 once again is 0. Same rules as above apply here.

I tried to explain this all in greater detail over here: http://www.sr20-forum.com/tuning/40511-beginners-guide-chipped-ecu-tuning.html#post522671

Sorry for not reading that, i thought i did at one point but not so sure now. We disabled the O2 for tuning and adjusted all of the cells. some of the numbers in that feedback section had to be set pretty high. We are using TunerCode and set the current Inj size to 370s. I will check to see what the K value is set at.

Thanks for the info.

Dude no worries, I just point to that so that I don't have to retype it all since I'm being lazy .

You should not have to touch the feedback at all. What you need to do is, turn off O2 sensor, hook up wideband, drive at cruising speeds and loads (throttle not open too far). Then adjust your K value and or current injector size until you get 14.7 cruising. Then you adjust from there.

Ok, that would make it easier, we already tuned the last 2 cells on the dyno, if i adjust the K value these will have to change correct? If i can get the WB to data log it would not be hard at all to readjust those values. This is starting to make more sense now that i kind of know how things work.

Another thing, with data logging the WBO2, do i need to use DataScan? I found this thread, http://www.sr20-forum.com/tuning/50809-nissan-datascan-1-54-how-datalog-wbo2.html Or is there a way to see it through TunerPro?

Datalogging WB is alittle tricky, NismoTronic really made it easy for me. To get it to work with TunerPro, you need to split the voltage and run it through the ECU. Until TunerPro comes out with a gadget to connect to the wideband directly that is.

If you adjust K value, or current injector size, both are variables part of a bigger equation, you mess with whole map including the two cells you touched.

The RTv2 analog inputs are displayed in the "RTV2 IO" item list. You can edit the ADX and display them anywhere you want, and also change the conversion equation to display the value as AFR, if you know the voltage to AFR conversion factor for your wide band. The voltage is roughly x/200.

Dave

I'm excited to use my NismoTronic when my car is done. The GUI seems very easy to navigate.

Also Nismotronic says not to adjust the K value as it throws off other calculations done by the ECU. Going to re-read some of the Help topics to get a better understanding on this.

Thanks for your help.




I will note this and try it when i can get in his car again. The WB is an Innovate MTX-L, i will do some searching for this info.

Thanks Dave.

You can adjust the K value when you change out mafs. Like I had to increase my K value after installing the Z32 maf, otherwise my tuning resolution was too small because Z32 maf flows a lot more then I am running.

Just try not to touch K value too much, use Current Injector Size to adjust fuel amounts.