Help me read my logs

Well it sure feels strong, other than the infamous butt dyno and the logs I have nothing else to go on. I can tell you my MS3 ran strong and per the logs this 4500 pound monster is out ahead of it in every way, not to mention from a dig. I have not been to the track and have not ran any other vehicles worth mentioning so thats all I can say about that.

I did my first launch from 2k on one of those logs, I was shocked at the acceleration out of the hole. Unfortunately I also got the delicious smell of the PTU puking and my next launch was all FWD. After giving the car some time between the next launch I was in AWD mode again. I think Torrie is getting closer to getting it dialed in and the summer gas should be out soon. Once we get it all ironed out and running right I will move on to another tune. Still have not decided if I want to go right on to meth or if I want to start on an E20-30 mix. Going off these logs it sounds like I wont have much fuel headroom and may have to go the meth route.
 
That log you posted from rev. 3 you said was the cleanest...I'd agree because the boost was the lowest and spark was smooth...Wastegate duty was smoothest. ..Looked like more consistent boost throughout the pull....Load never went above 1.82
 
AJP turbo said:
That log you posted from rev. 3 you said was the cleanest...I'd agree because the boost was the lowest and spark was smooth...Wastegate duty was smoothest. ..Looked like more consistent boost throughout the pull....Load never went above 1.82
Click to expand...

So i would assume Torrie is trying to build on that. I have Rev6 loaded, I will see if I can get some logs this evening. I also had some killer DA on that Rev3 log, -900 or so. Thanks again for taking a look.
 
AJP turbo said:
Hey scott how is the logging and car doing on rev 6?
Click to expand...
Feels good but have not logged any runs yet, should be able to get some in today or tomorrow and will post them up!

Sent from my SM-N910V using Tapatalk

 
Nice looking logs scott...Does it pull well? I'm curious to see if Torrie is satisfied or he wants to tweak....I don't think he will add anymore, it looks like a pretty hot tune. I like that boost level...See how smooth 3rd and 4th gear are? 1st and 2nd gear are hard to get even boost...Things are happening so fast and the revs are building so quickly the Wastegates and ECU aren't reacting fast enough and there aren't really any provisions in the tune to adjust the gates based on gear

You have some knock sensor activity but they were doing their job

Did you have meth? And you should log Iat2...That's the temp at the map sensor...It will be the hottest and what the spark modifiers are based on...and change the unit to Fahrenheit lol
 
It does feel good, but he is obviously not done yet as he has sent me another revision already! At this point it is fine tuning and its hard for the butt dyno to tell the difference with all these runs I have been doing. The real deal is taking it to the track which I don't do often. I am anxious to get this tune finished up and start on the next which I think will be a meth tune. Appreciate the input. It would be awesome if you put together a "how to" on reading logs. There is so much out there but not much on how to get started with just the basics of knowing what you are looking at.
 
AJP turbo said:
Did you have meth? And you should log Iat2...That's the temp at the map sensor...It will be the hottest and what the spark modifiers are based on...and change the unit to Fahrenheit lol
Click to expand...

I do not have meth, though that tune will likely be next. I use the config that Torrie sent me, i guess it does not log Iat2, I guess I could add that if I don't have too many perimeters already. I do notice the boost is nice and smooth but doing a conversion from kpa to psi shows its very high, clearly I am not at 30psi so I'm not sure what I'm doing wrong there.
 
While you have that config open you can go to select items and just eliminate the IAT and swap in IAT2 and that where you switch all the units...Are you using a laptop? or just the device with the config loaded?...Not sure how that works, I always use laptop

30 psi would be absolute I guess....You need to subtract the atmosphere....In general I guess you can use 14.7 but it could vary slightly but I don't know how much...200kpa is about 15 psi.

I think 210-220kpa is a good place to be without meth....Watch your IAT2 when it gets hot in the months to come...18 psi heats things up nicely lol....When you log iat and iat2 you can see the air heat up even after going through the intercooler as it travels to the inside of the intake manifold...Spark gets super retarded at temps above 150
 
I didnt look but i would look at map for peak boost...if you are reading tip while the throttle is fluctuating the pressure will be higher because when the throttle blade is closing pressure hits a restriction....so basically the throttle closing causes tip to rise....and there were some throttle fluctuations.....usually thats when tip is highest

Even when the throttle blade is open fully tip will be 4 to 7 kpa higher so u will get like .25 to .5 psi pressure drop across throttle
 
AJP turbo said:
I didnt look but i would look at map for peak boost...if you are reading tip while the throttle is fluctuating the pressure will be higher because when the throttle blade is closing pressure hits a restriction....so basically the throttle closing causes tip to rise....and there were some throttle fluctuations.....usually thats when tip is highest

Even when the throttle blade is open fully tip will be 4 to 7 kpa higher so u will get like .25 to .5 psi pressure drop across throttle
Click to expand...
Using MAP he's at 19.87
 
Just a spike after an upshift id say...his desired top was about 217kpa if I remember..thought thats about 16-17psi ?..dont have my handy dandy calculator
 
Hey AJ!  Wanted to say thanks for the work on this issue, I was able to use this information to help someone over on SHOforum, all straightened out now :)  Thanks also to scott for bringing this topic to light, and FoMoCo for assisting with the analysis/asking the right questions.  :thumb:
 
Hahaha....don't worry you haven't convinced anyone yet ;). Rev7 is feeling amazing. Maybe its just the cool morning air but it seems to pull hard! Hope to get some logs this week, weather looks good just need to find the time!
 
Well here are a couple pulls on Rev7. I'm curious about spark advance, in all logs not just this. Why does it appear to fluctuate so rapidly? I can see boost and load fluctuates with it, nearly mirroring it. I suppose boost increases as timing is added. I am guessing those fluctuations are normal and the engine is trying to maintain a commanded boost level or load? I don't have any smoothing of the data turned on when I am viewing it in live link. I seem to always get a 4+ knock after the 3-4 shift in all the logs and load has smoothed out and seems to hold steady at about 1.75.
 
Im out of town til friday night with no laptop....boost does not increase as timing is added!

Spark is dependant on load...when load is high less spark is commanded...when load is low more spark is commanded

The ecu is commanding desired tip (turbo inlet pressure)

Load will vary throughout the rpm at a given Tip or boost due to the engines varying volumetric efficiency theoughout the rpms
 
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