She is all over the place right now..... anyone please help guide me in the right direction?

Mods below 93 oct pump gas..... Thanks

 

Let me try. What is your peak boost? your car is spooling fast, you're able to hit 270-280 load cells at low rpm (3500) which may have timing setting at negative currently. A little too rich at 4000-5000 rpm.

 

Great a reply !!
Thank you soooo much I have the weekend open for tuning so perfect timing.

Ok I use a HMB set at 21Psi on a mech boost gauge, I currently run the car with auto AF tracking on aiming for 11.5 at WOT but I still have control of the mainscale and low/mid/high settings as well.

For tuning I am using the MAFT Gen II (not pro) and ecuflash (but ecu is untouched at this point)
logging: Evo scan and mitsulogger

Thanks

 

Boost is late for a IX, AFR's need help at peak spool (15.5 tip in isnt helping), add timing at peak torque. More or less everything you already know if you have a GT40'd second gen.

I am curious about your barometer reading though. What barometer is it using to calculate that? I realise its a blow through but the value doesnt change at all (barely) so I am wondering how the ECU is responding to this.

 

Thanks for the look. I was lucky with my 2G it was tuned by a local shop where I used to live and the car has ran the same since day one, so I never good to hard into tuning but I did do a lot of logging. Even though I use it on the 2G with dsmlink my knowledge was still very limited outside of AFR management. So ecuflash is like Pandora’s box to me and my dumb *** adding MAFT did not help hahah, but hey when you see a good deal you jump on it right? ..... right?

I do see the 15.5 tip in and I think my timing adv is some where is the mid 20's at that time, this is where my main confusion comes in to play. I like using the GEN2 to do AFR changes esp. because of the auto AF tracking so where does ecuflash come into play in all of this?

I am tuning the AFR with auto AF off today so I can range it as close as possible without the gen2 af tracking helping to much then ill add the af tracking to it so it’s right on point and the auto tracking is not overworking. After that I am going to post another log to see if that helps with the crazy tip in.

My target AF is 11.5 with high boost tapper at 10.8 just to be safe. So stay tuned for some more logs to be pimped

 

After some playing with the VVT Map and the HOI Maps, some more playing with the MAFT GEN2 here is my newest log please let me know if you see any areas I can improve.

Note: Its just one 3rd gear pull from 2500K.

Thanks!

 

Wow, your load #'s went down dramatically on that log, lower your boost?? I only had a second to look at in in excel but I did notice your timing dipped to 3* in your peak load area around 3600rpm. Check your 200-220 cells and try to have it stay in the 4* area without dipping. It also is dipping in the 4300-4750rpm range and bouncing between 5-6* so check those cells as well. It's definitely running too rich in the 3750-4750rpm area as well. Sorry I cant be more informative but I have to head out in a sec. These guys will help you out though

 

I did not lower the boost so why are my load number lower? What the best method the get them back to the quick spool I had before?

I am thinking ok switch back to my backup flash before I messed with VVY and HOI. At least I was getting quick spool. Or at least put the VVT map back .

thx for your help

 

This might help you out some. Someone wrote this excel file. Basically just input your target a/f then what it is in the fuel map and what its shows in the log. It will calculate it and tell you what to put in your fuel map

 

I forgot all about that xls. Thanks

Now here is a question in regards to that. Should I zero out the maft gen2 and use this for my primary AF tuning?

With auto AF tracking off and zero settings on the MAFT my car runs at 9.0-8.0 AFR.

 

On the subject of auto AF tracking I have some questions I have been pondering if you guys could humor me. The MAFT was born for the Buick guys (at least that what I get from the history). If just happen to work good on other cars for MAF, so with that said I do not know if anyone knows about the old dial based MAFT.
If not let me enlighten you, it was a box with knobs that a fraction of a turn would make major adjustments on the setting, good product for sticking a GM MAF on a DSM but fine tuning was a b$#ch. So now they have these nifty digital box’s that are great for fine tuning as each setting is detailed on the screen and not some dumb eyeball tuning knob. Well I got the GEN2 because I wanted that digital interface and I do not want to use Speed Density so that was good (plus I got a hella good deal). Well the one good thing about the old knob style one it was easy to zero out and use other tools like DSMlink to tune.
The GEN2 is a little more intrusive and has some extra alluring features.
In my mind ECUFlash is like DSMlink but with some differences, so logic would say zero the MAFT GEN2 and then use ECUFlash. Problem is I am a lot more confident using the GEN2 MAFT then Flashing, so in the last few weeks I have been crash coursing myself on ECUflash and all that. So I made my fist ECUFlash tunes and that’s where I got the log above.
Ok my mind is saying go turn off auto AF tracking zero settings and use that calc .xls above? For the MIVEC map I used the IX JDM9 map should I change that back?
Basically the only Flashing mods I have does are the 2byte Load with lean spool, I changed my MIVEC map, and changed my HOI 1,2, and 3 maps?

If I am on the right path let me know I have laptop in hand ready to go!

Thx everyone.

 

Do not compare your load range to the others of similar mods due to you using MAFT .. you're altering the airflow signals to fool the ECU into running richer or lower by changing the loadsites ..

Stabilize what you need for the AF using the MAFT (since it's obvious from your 1st log that the MAFT is not calibrated correctly initially) and then change the timing as required..

You will never be able to smooth out the timing very nicely because the MAFT is correcting the airflow signals at the same time..

Your 2nd log actually seems more normal for the loadsites you're going thru.. so now is when you can play around with the timing .. and if need be play around with the fuelling at certain rpm sites ..

Remember if you do any adjustments to the MAFT, your timing will go off again ..

 

I personally will hold off on ever removing the MAF until it is my only bottleneck in the system. I love when peoples reasoning to go with a MAFT is to vent their BOV's to the atmosphere,lol. It definitely seems like a pain to try and use the factory ECU and a MAFT.

 

Yea doing it for VTA is all the wrong resons, I wanted to do it bacause I love how the spool up time is sooooo much quicker on my DSM with MAFT. And when I first put it on the EVO I noticed that same quick spool feeling.

So here is where I am at now, I reset my HOI maps back to stock. Changed a few settings on the VVT map. So now I am about to go flash and log. Be right back with results.

 

So you are stock turbo right? The best spool up I saw was around 3500rpm's which is what mine does anyways. If I was running a bigger turbo I could see the use (generally when I see them in use) but I don't find it useful enough on the stock turbo.