Let me add my observation to yours, Bryan:

I have been scaling a lot of 1000 CC injectors lately. It is the latest trend it seems Why change injectors all the time? If you want more power later on and your stock injectors are maxed out, start with big injectors and be done with it once and for all.

1. Changes in latency creates more changes in fuel trims than changes in scaling. On one Evo 8 that I scaled, a 0.1 change in latency changed the trims from -12.5 top almost 0. Amazing. So make your changes in 0.05 increments.

2. Evos with more than TBE in mods seem to require different latencies/scaling than Evos w TBE in mods.

3. There is a LOT of trial and error involved in setting scaling/latency. What works with one EVO, might not work for another.

4. When logging trims keep logging until the trims settle. You know they settled when the values stop stop going incresingly higher/lower and tend to hover around the same value.

5. I have seen Evos with stock injectors (mine is one of them) with trims getting maxed out. I usually scale these cars to around 472 and that brings the trims to +/-3. Not all Evos do this, but some do. I think Mitsu erred when they used the same scaling latency for the Evo 8 and the Evo 9.

6. When I adjust the latency table, I usually adjust from 11.72 to 18.68 volts.

 

Ahh. Yeah the Zeitronix also has the direct analog output as well as a direct linear 0-5v output. Seems like the responsiveness isn't really an issue for this concept if you ask me.

 

You have seen Evo's with stock injectors with fuel trims either +25 or -25?

Something is wrong with those evos then.

 

I explained this a few times in the several posts I made about tuning injectors. You can know how much latency changes will affect your trims exactly if you really wanted...simple math.

Just log your IPW at idle and at cruise. If you IPW is 1ms at idle for example, then a .1 change to your latency value will change your LTFT Lo by 10%. Usually cruise IPWs are roughly twice your idle IPW, so latency changes will tend the change the LTFT mid half as much.


Eric

 

Just got my reply from Zeitronix, their analog output is 1000 samples/second!

 

I was referring to LTFT-low and LTFT-mid. They max out at +/-12.5

 

Thanks Eric...You are the king of fuel trims

 

ahhh, sorry mis-read. I was gonna say. ;P

 

what is the is the correct formant cc/min by ?? (thanks in advance)

 

This really didn't make any sense to me.

 

One of you guys needs to see how these stand-alones use the auto-tune feature. Even Megasquirt has it. C'mon, its gotta be a piece of cake for you geniuses,lol.

Here is a little bit of info from a quick googling:

http://www.mx6.com/forums/2g-faq-per...and-setup.html

 

Ok, question for you disasm guys. In the fuel maps, in the AFR scaling, what is the X value derived from (where is the address pointing to)? I know its an 8bit decimal value from 0-255 but what calculates these decimal values?

It has to point to injector pulse width and I know the injector pulse width gets varied by the other 'correction' tables (i.e; air temp,coolant temp, etc...) but I know there has to be another map hidden somewhere for the IPW-to-8bit calculation which the AFR scaling uses.

 

Sorry if this question is OT, but can someone tell me how to change the Open Loop Throttle Low Load and High Load tables to display percentages instead of volts?

 

https://www.evolutionm.net/forums/sh...68#post5238368

 

Ok I asked this in my own post but i have had no luck yet. I was wondering why my fuel trims would not be showing up in my logs from Mitsulogger. I am logging the car at idle and Im not sure if thats the problem either.

I cant get the car to tach out above like 3500 rpms it just bogs out. I have a wide band and mods in the sig. anyone have any insight ?

I am at the moment in the garage going through my vacuum lines making sure i have no loose ends or leaks anywhere in my piping and such.