Megasquirt Support Forum (MSEXTRA)

MS3 "Setting Up" page 70... "Before you start tuning AE, make sure your VE tables are dialed in"

... with respect, how do you know you're dialed in as well as you can? I'm still in the trial & error phase of VEAL, but in my last run, it started feeling like it's old self (prior to MS). I've incorporated AFR, so the VEAL is only interpreting/adjusting to what I input for AFR - no? Which is a best guess.

Q1 - Is it seat of the pants to determine "dialed in". What other factors should I consider?

Q2 - Should everyone then proceed to AE? Is AE required to get best performance? I only have MAP available currently.

Stats:
Porsche 3.0 ltr air cooled n/a with about 200hp. MS3 3.0

thanks again,

kj

If you are hitting your AFR targets everywhere in the RPM and load range at steady throttle, you can consider the VE table to be dialed in.

The only engines we've seen where the motor did not need AE were running vapor phase fuels - CNG or propane. Anything else needed AE, although you may luck out and have the default AE curve work for your engine.

... at steady throttle. I'll be more aware of that. Thank you.

kj

See if this helps

https://youtu.be/CG_kY3K_2AE

Andy

Hi Andy,

.... you've been incredibly helpful to a lot of people here and I've actually watched that video before. However, as a part time tinkerer, this would run my learning curve near vertical. But, I don't see anyway around it... either make it happen or run it to a pro. So, thanks for chiming in. It's decision time as I really enjoy autocross and the car sat all of last season because I got so discouraged. At least I can say it'll get me from A to B for now.

kj

For what it's worth, and I'm no tuner, and I started from scratch last August, I used the default afr table that the setup (after I entered all my settings inj size, engine cc etc) gave me. I did however resize it to a max of 100kpa and re-did the scale as mines not turbo, and I re-did the rpm scale also to fit with my engine better. I set the AE so that it would never activate and also I set incorporate afr table then went for a drive whilst datalogging. In megalogviewer I then tweaked the ve table to lean or enrich if required at certain points and went datalog driving again to check.
This has worked really well for me, and I've now added in the AE to fill in lean spots when I accelerate quickly.

I forgot to say that right at the beginning I drove it around with the laptop in the passenger seat and tweaked the ve tables using my wideband as a guide to match the afr table.



Sent from my WAS-LX1A using Tapatalk

Thanks Mega. We're similar in approach - only I used VEAL, but will start getting involved with datalogging as I think it's part of the process to incorporate AE. I'm going to start a thread about start-up and idle soon to try and better understand that process and get a less finicky start and smoothing out idle.

thanks,

kj

I run AE wile tuning VE.