Anyone tried the ITB tuning mode in Tunerstudio

[K-Roc]

Yea I was lucky enough to have the injectors tested on this page

http://www.msextra.com/doc/ms3/injdeadtime.html

So the work was done for me

[Devastator]

IIRC, when you switch from any % of MAP and TPS blended AE, to 100% of either, you will have to increase the amount of fuel squirted, because they work independently of each other.

[Soul]

I'm curious as to what the prognosis will be. Has anyone put an eyeball on the submitted files? My ITB setup should see the light of day this summer so I'm trying to gather as much info as possible.

[andy198712]

Ditto!

[Volky]

Good day,

I have been thinking of changing to ITB mode myself for some time now. I saw this post and started making some research. I found this which is quite helpful:

http://www.77e21.info/mstuning_itbmode.htm

I my case, I made some changes to the initial table and it runs smoother than SD. I still need to make some changes.

Thanks,

[Piledriver]

Note that is for the B&G code and many details may differ from MS2Extra.

[andy198712]

guessing ms1 2.2 extra won't get this?

[Piledriver]

I'm pretty sure ms1-extra supports alpha-n...

[andy198712]

Thank you, will look into that!

[K-Roc]

First question: (as we don't have your msq yet )

Sequential?
Really matters at tip in (in particular), not sure what strategy will work best for a huge cam.

Failing that, you have semi-sequential (timed batch) with the std hardware if you turn it on, it at least guaranteed consistency.
(It should probably be default, but wasn't last I ran MS2-e)

The wall wetting is a fuel calculation for fuel that is going on behind the scenes... It literally does a running calculation how much fuel is stuck to the manifold and ports walls as liquid at any given instant.

With aim like yours and probably low velocity at lower RPM, the injection timing and wall wetting tables would be the third thing on my list after getting a decent VE table and having the timing right.

(Don't forget to find out what your lambda delay really is, having it right takes most of the random changes out of VEAL)

Hey you were busting my chops for not posting up an MSQ, Not sure if you noticed but it's back on page 2.

Cheers

[Piledriver]

Sorry, the Job thing gets in the way, I will try to spend some time on it this weekend.
Mind, I'm not running A/N or ITBs. so I'll largely be poking at it with a stick looking for something obvious.

You'll likely get much better response and answers on the msextra forums.

[K-Roc]

Thanks man, all ideas welcome!

[Piledriver]

Looked at logs, appears you are flooding it hard on accel events.

set all lags to 100 unless you determine lower is required.

Take a look at using the vry nice idle ve and idle timing features, I did not run a IAC for a long time, the advanced idle features help make it drive like a real car once set up..

You will probably find the motor is much happier running a bit leaner than you have it, esp at cruise.
I'd target ~13.1 at WOT, and at least 16:1 at cruise... I run a hard transition between 83 and 87KPA and run 19:1 at cruise, and used to run 22:1 no issues but my current WBO2 won't read over 20:1.

Depending on your chambers and DCR you may need far more timing... or not.

Getting the effective WOT curve table set makes a big difference, at low RPM, ITBS might be WOT at 10% open.
People frequently confuse the lack of actual throttle response (on/off) with GOOD throttle response...
Most folks would say some kind of proportional action between foot and reaction would be good.
Too big ITBs lack that inherently, except perhaps near redline.

(that table is probably even more important for A/N---sorry not in ms2-e? yet)

Rich of stoich or lean of stoich requires more timing, more timing required the more you shift away stoich..

For comparison, heres my current msq (vastly different motor, but you may find a nugget in there.)
FW=MS3-pre1.4A1, requires latest beta TS.
Note: this table is in tuner studio only, it stays with the project.
Load new FW/create a new projects and you have to reload/enter the table into it or you are stuck with the defaults.

Also, make sure to try and figure out your lambda delay, having it and the injector parameters right makes Tuners studios auto-tune pretty much bullet proof when RPM/load varies while tuning.

I have a long tube euqal length tri-Y header, YMMV.
This is probably much closer to typical VW 4>1 length wise than the defaults, suspect they are for log manifolds on V8s.

pile-lambda-delay.png

[K-Roc]

Thanks a lot, that gives me a bunch to chew on....

your TPS accel enrichment curve is quite interesting!

Cheers

[Piledriver]

Had to go look--I think those are the default MS3 curves...
To tell the truth I played with it for about 30 minutes, once.
Simply enabling eae after the ve table was nailed to the floor gave me ~excellent results.
(in addition to minor playing with the thresholds etc, i was probably fighting something else etc....)
Do not try EAE with a poor VE table, it will greatly amplify the suck.
YMMV severely.

Here's (IIRC) my last MS2-E tune...
I have learned much since then, but it worked pretty well.

pile-ms2-gs27-2012-08-03_03.19.59.msq.zip

As far as driveability goes, I would seriously consider going sequential or at least turning semi sequential on for consistency.
(semi sequential is just batch with timing control of the shots, no mods required)