How do YOU tune?
 

and i dont want to hear "take it to the tuner"

i have had a friend drive the car before while i was in the pass seat with the laptop and that seems to work decent. but its hard to find someone you trust enough to drive it at the same time that you have time to tune it.

so my question is how is everyone else tunning thier cars? i just upgraded to high res, and just threw in the MSPNP fuel map with my req fuel, and it needs tuned BAD, rich everywhere. just want to hear how others are doing it to get another perspective.

you drive & log for 10-15 mins varying the load and rpm combinations to cover the whole fuel map.
run log through VE analyzer in MLV.
accept new msq.

repeat.

i have never used the VE analyzer. looking into it now, thats some cool stuff. much easier that just looking through the logs and trying to tweek the map like i was doing.

MLV is awesome, I always use it

the only thing i have to say about VE analyzer is

Attachment 212628

When you talk about load, you make reference to what?

Engine load, 30 kpa is a low load situation 100 kpa is WOT when NA. He means put the engine under varying loads relative to RPM to hit as many cells as possible in the VE table. Then let MLV work it's magic.

a kotomile at a time.

:bowrofl::bowrofl::bowrofl::bowrofl:

I couldn't get my MLV to open. I guess I'm going to have to reinstall it.
I started from an idle touching the pedal and advancing to my brother driving me down the street chasing the green dot on Real time. It took 2 hrs to get a tune so I could drive it to work safely. As soon as you would let out of acceleration it would lean out. I'm lucky to have a Q & W still on the keyboard. LOL

Autotune is much simpler than MLV. You don't have to reload the MSQ all the time just drive the car and it tunes on the fly. Doesn't get any easier.
--Alex

however it doesnt work nearly as well.


it's easy for me to drive to work and record a log. run it through MLV and flash it at lunch. It's usually good to go after a few sessions, when you get to the point where EGO is almost always 100% I turn MLV to hard, then very hard. I can also tell it to ignore anything under 35 kPa and 1800RPM.

Driving with autotune is a good starting off point to get you in a spot to start using MLV.

That's true. I have used MLV to adjust specific parts of a map, and I'll be using it to adjust throttle transitions and off idle conditions. For general tuning (cruise, part and full throttle) though, I like autotune.
--Alex

MLV kicks autotunes ass at all tuning end of story. Autotune is incredibly incompetent and slow. MLV gets everything balls on for me, like Scott said, close enough that EGO hardly has to do anything.

Autotune is far too slow for anything but cruise. Using it for any kind of acceleration is pretty much pointless.

Ditto. I do the same thing. Log the drive to work, run it through MLV, increase from normal, to hard, to very hard for subesquent tuning logs. Alt-L baby.

good tip. i forgot to mention that. I like to set my idle manually and don't let VEA modify after.

as someone said above, ALT-L Enter to start a log, then just ALT-L Esc to end it.

How do you do that?

I do the same thing all these guys said and it works great. Its easy to figure out and work with.
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^ press on advanced settings in the VE analyzer and you can set bounds.

ve analyzer is your daddy. I prefer using that interface to tune tables.

d'oh, I'd been using ALT-F, L, O to end them..

yeah the VE analyzer is sick nasty. just another reason megaquirt is so damn awesome. it amazing enough to have a $200 full standalone, and then it will basically tune itself just blows your mind.

Too bad its so unreliable and never works. :jerkit:

I laugh at people when they tell me how unreliable they "heard" megasquirt is. Then tell them maybe the people they're talking to are retards. :hustler:

MLV == teh Shizzle. No other way.

+1 i was running v2.2 (pre 3.0 for the OGs) when the megasquirt trend just started about 2-3 years ago. it really is the best thing that has came to the car/bike performance world in a LONG time. and everyone still doubts it, if they have even heard of it :bang:

The only problem I had with MLV and VE analyzer was that it did not seem to want to converge on a solution. That is, each subsequent log and VE tune would go leaner-richer-leaner-richer, and just oscillate back and forth. After raising the ease from normal, to hard, to very hard, this problem seems to have been minimized.

You have to be close though before you go to the very hard setting because the VE adjustments become very small at that point, like 1-2 points, even if the VE is way off. At least that has all been my experience.

People are so ignorant. I built mine in 2003 before V3 / MSII was even a concept. Its been an interesting road and I've had some problems, but all were because of my own mistakes. During the approx 7.5 months I've had MS Installed on my miata theres only been one reliability problem which was fixed by reflashing the firmware. It still blows my mind how simple the whole thing really was -- Everything from the build, installing it into the car, configuring, and tuning.. What a great learning experience it was, too! :cool:

In other words, the tune was doing the exact same thing that the mixture does on a stock car normally, yes?

(waiting for it to settle)


And that's exactly why that variable is there.

Ever painted a car? Or painted anything that requires sanding?

When you first start out, you have the MS set with large EGO authority and short step times, and you have MLV's analyzer set to easy. This ensures that you can quickly get the table roughed in. That's the 500 grit stage- it's making big changes quickly.

As you progress, you start to slow the EGO feedback, and set MLV to Normal. 1000 grit- starting to take the rough edges off the map. You'll probably start learning to properly hand-tune the cells around idle at this point.

As the map starts to really fall into place, you reduce EGO authority and switch MLV to Hard. 1500 grit- now the map is getting smooth, you'll be filling in those cells at the edges of the map that never get touched.

And lastly, you'll spend some time at MLV Very Hard, just to see what it does- cells will be going up a point or two one day, down a point or two the next. At this point, you can whip out the 2000 grit and give it a nice hand-polish. (ie: tweak the last few out-of-bounds cells by hand).