Trying to get meth dialed in... Issues

[Scott4957]

Scott have you considered running less meth? Like nozzle or duty cycle? I'm not sure how your controller works.....You are really rich which isn't the worst thing but you have room....Your stft's are bottomed out still and the ECU is not able to pull enough fuel to hit desired lambda.....It wants .80 lambda and you are in the .70's.

Might be getting fuel dilution and just wasting Meth and greasy plugs maybe I dunno.

I'm looking at a similar spot in your new log to make an apples to apples comparo. At 5k in 3rd gear you are at about 1.90 load again and now at 14 degrees instead of 12. So yeah you should feel a bit more power...Remember spark follows load. The look up tables in the tune are load and spark. Boost can be different at particular loads based on conditions.

I don't know if TOrrie added spark or your conditions and temps called for that spark increase....IAT2 is the manifold temp that spark compensations are based on....Could've been cooler and I don't mean ambient temps only IAT2 will tell you.

And typically you don't add wastegate duty cycle to change boost. You command more or less torque from the engine and the wastegate dynamics adjust to deliver the airflow to hit the desired TIP value set by the ECU.. Or the less than ideal way  is to just use a multiplier to the desired TIP value.

Good stuff, thank you for looking. I am just following Torries lead right now, seeing that the OP switched to a smaller nozzle I am sure if Torrie sees a significant difference he will advise. Another idea I had was to use that rich condition to start introducing an E mix to the car. A few gallons of E should give the car the ability to get closer to .80 lamda, how much closer and how much E i have no idea. I really only want to go that route if there is a significant gain, something that can be seen on a time slip or felt in the seat of you pants. It would be great to be able to run the same tune either way, just being a bit rich without the E, then add it for "special occasions" Whats your thoughts on the effect an E mix would have on this tune?

So it looks like he commanded the same boost, and after looking again I got about the same boost levels. Spark was what differed. The runs were a day apart and condition's where actually better on the previous revision "Saturday", as far as the DA goes anyways. Based on the increased performance and the fact that he did not change the commanded boost I am making an educated guess that he added spark. Though likely meaningless to someone who can tune like you and Torrie, I keep track of every run, 60-90 60-100, the DA and anything that would change those times like a full tank of gas as opposed to a quarter, as well as any significant wind. That last log was significantly faster than my best and it had +1000 DA over the fastest log.

I’m trying to understand more about what parameters are/can be adjusted. Sounds like commanded boost, load can be commanded? and spark tables can be adjusted? Are load and torque the same? Reason I ask is because I had this great idea to adjust commanded boost differently in different gears, Torrie agreed and said to let him know when I figured out how to do it LOL. I guess our access to the PCM is not the same across all cars, the Mazda had the ability to adjust commanded boost based on gear.

 

[ajpturbo]

DA has no effect on spark...temps in the manifold do. Because the compensations are based on temp.

You dont command load or boost ...you command torque and the ecu translates that into a boost pressure(tip) or turbo inlet pressure required to achieve the commanded torque

What is that telling you if you are needing to add ethanol to make the tune better?...your fuel and airflow model are off!..its why i dont like it.

You dont need E!...you have meth!...thats giving you the extra fuel, cooling and octane in 1 shot!

No way that ive seen to run boost by gear on this controller...doesnt matter the tuning device used.its the ecu

 

[JCam550]

Looking good, I am doing mine at the same time and Torrie seems to be taking two different approaches. You are running a ton of timing and I'm not, but I have a little more boost. I realize timing gets pulled with increased boost but it is a significant different in timing but only a little difference in boost. Performance markers and environmental conditions seem to be nearly the same. Here is my latest log, I will let AJ tell me how wrong that assessment is LOL. Pulls like a raped ape huh!? 60-90 times on this latest revision where just a hair faster than my last, but I had 1000 feet better DA on my last revision log.

Scott,

I'm just looking at the log and typing randomly. Your wastegate duty is much more natural than JCams, it's smoother and not completely maxxed out. You both are commanding about the same boost. But you must be shooting more meth because your stft's are bottomed out. The ECU is pulling as much fuel as it's allowed. Because you are running pig rich at times, below .70 lambda at times.

Scott you never get fuel pressure dips....Makes sense if you are dumping aton of meth and the ECU is pulling fuel. And same thing on the knock sensor...You could probably use more spark but you are riding a spark limiter..See your knock sensor flatline? Once I adjusted the spark limiter it's possible to run conservative spark curves but then the knock sensor gives you the max allowed so the best of both worlds can be achieved.

Scott you and JCam when I checked at 3rd gear at 5000 rpm you are both about 1.88-1.90 load and scott you are at 12 degrees and jcam is 18 degrees. That's substantial. I didn't expect to see that much. Scott maybe torrie can give you more spark with more revisions?

. Sorry OP, didn't want to threadjack.

No worries.  I'm glad to share the post and look over/compare our logs. 

I have 2 new revisions a the last one Torrie told me she's dialed in.  I will get a log for you and post soon.

 

[Scott4957]

Great, I'm excited to look at the finished product!

 

[JCam550]

Sorry for the delay guys...  Been busy as hell...
So here's the datalog of the final tune. 

 

[ajpturbo]

JC,

Did you nozzle down a bit on meth? I didn't go back and look but your stft's were in the .8x range. You or someone else was was in the .70's . I would live with the .80's as a compromise for a meth tune but I'd work on making it better if it was mine.

Your knock sensor was happy and you could probably run more spark but why push it...Your boost is moderate in 1st and 2nd and 3rd is a bit more aggressive and if you got it to 4th it would be at least as good as 3rd...but I don't think you can get anymore as Torrie has it....I'm not sure why your wastegate duty is 100% and that's all the boost you are getting...Most likely has to do with settings but I'm only speculating...You are commanding about 236 KPA but falling short of that mark with the exception of boost spikes upon upshifts.

Your afr's are close to commanded so you aren't pumping so much meth that the stft's can't handle it so that's good...Fuel pressure is good except for the dip when you get the huge boost spike at 2-3 but I wouldn't worry because the meth is there for you.

You are maxed out on spark in one area I can see a flatline so the tune will keep you from running too much spark even if the knock sensor is calling for more but it's not because you can see most of the run it's at 0 and not negative

Enjoy the beast lol

 

[JCam550]

Thanks for looking it over.  I am running a 504 ml/min nozzle.  It is a bit smaller that the original 625 i was running.  It seemed to be a little too much meth. 

As far as the boost, is it possible that I might have a small boost leak or is that typical of these turbos to drop off?