ECMlink Please review logs TUNING GURUS

[evil_eagletalon]

Whats up guys and gals. Did some street tuning tonight on my car and would like some feedback on my logs. I am aware of 0.4 degrees of knock occuring in the logs however i ignored it for now as it is sparatic and not over 1 degree please correct me if i am wrong. This is a built 6 bolt on full e85 and a borgwarner s257-sxe @ 16 ish psi. Afr during spool up is in the mid 12's and tapers to 11's by redline for now for "safety".

THANKS

Here is a redline log.

 

[Diamond Star Werks]

No wideband? Or is it just not wired up for logging?

IF I had to guess, I would say your probably running lean as your narrow band got down to .55v near the end. .45v is stoich - 14.7.

 

[evil_eagletalon]

No wideband? Or is it just not wired up for logging?

IF I had to guess, I would say your probably running lean as your narrow band got down to .55v near the end. .45v is stoich - 14.7.

Yes i have a wideband but not logging. Its actually running rich in that run by redline it was 10.8 so i adjusted my VE table accordingly.

Spool up was 12.8 tapering to 11.8 in boost dropping to 10.8 by redline

 

[Stapl3]

Using airflow adjustments as fuel adjustments without the fuel system calibrated for peak VE is wrong.

The WB sensor is arguably the most accurate sensor in the car, it's paired with a computer, and you're ignoring that. Screw the gauge. Wire the sensor up so the software can datalog it.

 

[evil_eagletalon]

Using airflow adjustments as fuel adjustments without the fuel system calibrated for peak VE is wrong.

The WB sensor is arguably the most accurate sensor in the car, it's paired with a computer, and you're ignoring that. Screw the gauge. Wire the sensor up so the software can datalog it.

Ok i will wire it to log today.

Back to your first statement. Im not sure i understand what you mean?

 

[danl]

The airflow adjustments are meant to calibrate the ecu, not fool it into adding fuel. If you want to add fuel, you directly add fuel.

It will become more clear after you start logging the wideband. The wideband is one of the tools used to calibrate the ecu. After it is well calibrated then you can start power pulls.

You skipped a couple steps that you need to do if you want a good running, reliable, and powerful car.

 

[evil_eagletalon]

The airflow adjustments are meant to calibrate the ecu, not fool it into adding fuel. If you want to add fuel, you directly add fuel.

It will become more clear after you start logging the wideband. The wideband is one of the tools used to calibrate the ecu. After it is well calibrated then you can start power pulls.

You skipped a couple steps that you need to do if you want a good running, reliable, and powerful car.

I am confused it is something you guys see in my log? I have not made any “airflow” adjustments.

 

[99dsmer4g63]

I didn’t look at your logs but it sounds like your sd table isn’t 100 at its peak. Probably higher and that means the fuel system isn’t calibrated.

You’re saying you need fuel so I’m assuming your tweaking the sd tables air flow to “add” fuel because it needs more because the fuel system isnt calibrated correctly.

Just guessing though from past experience as I’m not on my laptop

-Daniel

 

[evil_eagletalon]

By “adjusting” sd i meant to say adding fuel via VE table

 

[danl]

You don't resolve a fueling issue by using the VE table. It will become clear after you get the wideband connected.

 

[Stapl3]

By “adjusting” sd i meant to say adding fuel via VE table

That is using airflow adjustments for fuel adjustments.

 

[evil_eagletalon]

So what is the VE table for?

I got my wideband wired in this morning i wont do any logging today though. I also “calibrated” it through ecmlink

 

[Stapl3]

So what is the VE table for?

Adjusting airflow. You can only really guilt-free do it when the fuel system is properly calibrated. You calibrate the fuel system with the WB and WOT pulls past peak VE (5500rpm)

 

[evil_eagletalon]

So my VE table to to make my wideband match my target AFR in my high octane table? If so its very very close.

 

[Stapl3]

You want AFRATIOEST to equal the WB at 5500rpm AND the cell used at 5500rpm on the table to be a value of 100. Once that occurs, you can do whatever you want with the SD table to make afratioest = wideband. Be prepared to ignore the number scribed on the fuel injectors and ignore the number shown on the fuel pressure gauge to achieve this.

The end result will be what you put in the high octane table is what the engine outputs.

 

[evil_eagletalon]

Wow thats alot!!! But i get it now!!! Does every tuner do this? Or do some tuners tune only based off of wideband readings?

 

[Stapl3]

Does every tuner do this?

Heh that got me a good laugh. No, not really. In the last 15ish years of looking through peoples logs (hundreds) I've seen it less times that I can count on one hand.

I can do the craziest adjustments ever and get the WB output I want. Doesn't mean it's correct.

 

[evil_eagletalon]

Makes sense thanks for the input guys ill try my best

 

[jed344]

Like some have said when you hit 100VE you know your injector settings are correct and fuel system. So then making it hit the target air fuel with VE table shows that the ecu's calculation of airflow and fuel it adds is correct. No trickery going on or fooling it just it being correct.