TUNING ORDER

Hey all,

I’m wondering what’s the best order to Tune, what should you get done first AFR, Spark, Idle.

Then from those categories what is the order to go through seeing as they all seem to have multiple things that can affect them?

Please note I’m very new in slowly getting a base understanding just wanting guidance and trying to form a check list to work my way through I feel it’s something that’s handy to do so when researching and trying stuff your not altering stuff you shouldn’t be touching yet

I’m using TUNER PRO RT.

I am doing tuning a VY V6 N/A not looking for gains just smoother running and to learn on as the mistakes won’t cost a heap 😂 if they were to happen

As a little side question also I hear a lot about VE Tables but I do not see it, do VY not use them ?? What is the equivalent? Note this is in tunerpro RT. Maybe the XDF files don’t define them and show them in the tables??

Thanks in advance!

First a disclaimer -- I am not familiar with TUNER PRO RT, nor do I know your VY V6 engine.

VE - Volumetric Effeciency tables are could be referred to by other names, like "Fuel Table" or "Engine Effeciency". Or perhaps your ECU is injector time based (so something like "Injector Open Time" or "Injector Pulse Width"

Does your engine have a Mass Air Flow (MAF) sensor? If so, then you will find much of the fuel tuning will often be done with the MAF transfer function, or MAF sensor calibration. This is where a frequency (or voltage) is converted into an air mass value (grams/sec or grams/cylinder often).

As to tuning order, it depends on if it's a from-scratch stand-alone or a reflash of an OEM tune. For a stand-alone, we put a simple ignition table in place, get the fueling working well enough in the idle area, then get the idle setup. It's much easier to work on tuning when it starts and idles easily. Then complete the fuel, perhaps visiting the ignition if any knock is detected, finally dial in the ignition timing, perhaps revisiting the fuel if you see lambda changes while adjusting.

With a reflash, you will usually find the ignition timing and idle work well, maybe you need to tweek the fuel (MAF and/or VE tables). I would take a quick check that fuel seemed to be in order, then concentrate on whatever issues were present (like idle, tip-in, fuel economy, etc).

Hey David thanks for the reply,

the V6 engine in the VY in the USA is the 3800 GM we call it an ECOTEC or L36, N/A Version of the L67 with a few different components

i believe there is tables that are named injector pluses or time, so is the principal for tuning it the same as a VE table

Uses a MAF sensor i have seen the Hz for it and voltage I believe it uses the volts only as the Hz don’t read anything and comes through as grams/cylinda do you know if CLYIAR would stand for Cylinda Air

ECU is flash based another question is what are some key tips for reading and interpreting Log data

with the MAF calibration could you extend a little on what it is that refer to are you calibrating the MAF or is it tables your changing that decide what the ECU does with info from the MAF?

thanks again sorry for all the questions trying to get a base understanding before deciding if it’s something I’ll investing a lot more into thx heaps

You may not realize it, but your Gold Membership gives you access to a huge library of 1-hour webinars. Go to this page, and search for things you want to learn about. I searched for MAF, and found these webinars that I think you would find helpful even if they use HPTuners or Haltech instead of your Tuner Pro RT -- focus on the principals, don't worry to much about the details of how HP Tuners works.

https://www.hpacademy.com/previous-webinars/204-hp-tuners-maf-re-scaling-made-easy/

https://www.hpacademy.com/previous-webinars/041-using-data-logging-to-improve-your-tuning/

https://www.hpacademy.com/previous-webinars/maf-millisecond-and-ve-explained/

https://www.hpacademy.com/previous-webinars/224-sd-tuning-hp-tuners/

https://www.hpacademy.com/previous-webinars/217-idle-tuning-hp-tuners-gmhp-tuners/

Awesome thx for the help appreciate it