Help me read my logs

[FoMoCoSHO]

There's a near full-second dropout of fuel pressure starting at the 2-3 shift point.  I have seen FP drop at a shift point, just not so much.  Load was def > 1.8 during that time though.

Drop in fuel pressure with increaed load is optimal conditions for knock lol....so even if you arent running lean you can see you have maxed out the fuel system....you wont see the drop in pressure with an adequate fuel system

Even if you aren't "running lean" lower fuel pressure causes fuel droplets to become larger, which kills atomization and can cause wall wetting creating the  perfect environment for knock to occur.

From all the stuff I've researched and watching how my car behaves I'd rather lower enrichment where possible keeping rail pressure higher. IMHO leaner with stout FRP is safer than pig rich with low pressure.

[SHOdded]

Yeah, load was almost 2.1 at it's peak during this period.

[AJP turbo]

Yeah, load was almost 2.1 at it's peak during this period.

Thats hardcore...thats well over 20 psi...what was spark? what was kpa? 250?.... Ecu would be commanding the same spark as if it was running 1.8 load...so expect to see knock retard there...big difference in load from 1.8 to 2.1

If i was running about 12 degrees at 1.8 load i would have load 2.1 at 2 degrees as a starting point lol

My load tables only go to 1.8 for spark...so if i get a slight spike i rely on the knock sensor to pull spark....and you can set a specific cam table to use a spark table that is really retarded also as a safety net

1.8 is the load limit for the stock spark tables so u less you "renormalize " the spark tables 1.8 is it

[SHOdded]

Hope this is the info you are looking for

[AJP turbo]

Wow 260 kpa!...damn scott...looking at that screen shot you can tell the knock sensors were doing their job...spark  went from 15 to 9 then 5.5 ...see how retarded spark is as load increases....2.08 load ....id have to check my calculator but that like 22-24 psi i think...just a spike but that alot of boost..

Id be willing to bet scott that rev 6 isnt as hot....im sure ur car is a beast though

Im not home yet but from that screen shot...i dont think the knock retard is from the trans at all....when u upshift load spikes...higher load requires more spark retard or lower ignition advance...torrie most likely hasnt touched the load scaling for the spark table, normally dont have to unless you sustained over 1.8 load.....so u spiked briefly and for a short time ecu was commanding the same spark of 1.8 load when in reality you were at 2.0 so the base tables were giving too much spark...then the knock sensors pulled out enough to keep things happy

[Scott4957]

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.

[AJP turbo]

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

[Scott4957]

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

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]

Hey scott how is the logging and car doing on rev 6?

[Scott4957]

Hey scott how is the logging and car doing on rev 6?

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

[Scott4957]

Here are a couple pulls on Rev6

[AJP turbo]

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

[Scott4957]

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.

[Scott4957]

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

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.

[AJP turbo]

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