2013 Si Calibration for AFE Momentum

[simmulator]

Got another quick run in. More traffic than I thought on a Sunday morning again but hopefully still got some usable data there. I think the Vtec window might have been a bit better in the lower range. Didn't feel laggy or bumpy when vtec hit around 5000 but somehow thought it was more responsive with the 4600 window. The beginning of the log shows the cold start where there's a bit of inconsistency in the idle, revs jump up a few times before it gets warmed up and settled. Not sure if the cold start is something to really be concerned about at this point, still starting and idling much better then it did with the other tune for sure. Let me know what we can do moving forward and thanks again for all the help!

EFICU Tune Rev05 Fifth Drive FP.fpdl

[EFICU]

Looks pretty good. I made a couple changes for the idle, we'll see how it is in this one. Also made a couple ignition changes for the knock and some small WOT fuel. Overall it's really close, just splitting hairs at this point.

simmulator.SD.Rev06 (Blended)(Vtec5000).fpcal

[simmulator]

Hey things are feeling really good! Can't thank you enough for the help. Cold start and idle seemed a bit smoother this time, overall really responsive and no laggy spots during the WOT pulls. Did another log and looks like there was no knock at all? I guess things are pretty tight. Is tweaking the vtec at this point as simple as just adjusting the windows up and down slightly?

EFICU Tune Rev06 Sixth Drive FP.fpdl

[EFICU]

Yep it looks really good man! Part throttle trims look great, no knock, and WOT fuel is dead on. I think we might be there. Keep datalogging over the next few days or a week, if you see some knock pop up let me know and post the datalog. But it looks great.

Did you have a vtec RPM you wanted to try? The way I ramp the cam angle up near vtec, we would need to adjust the cam angle map on the low cam so it will ramp up properly to whichever RPM you want to try. But yeah, did you have an RPM you wanted to try?

[simmulator]

It really feels totally different before we started, much better. For some reason I think I want to try the vtec around 4000rpm. Probably because my old car it kicked in at around 4000, curious to see how it handles. I will try and rip a few more logs if I can find time this weekend as well! Thanks again for the help!

[EFICU]

Glad it's better for you. Yeah if you want to try it at 4000 that's no problem. According to the data, it might fall off on the crossover at 4000, but see what you think. If you like it at 4000 from the feel in the car that's all I care about. Feedback from you guys is more important than the data in scenarios like this, so see what you think. I made all the changes needed to run it at 4000, so give it a shot.

simmulator.SD.Rev06.1 (Blended)(Vtec4000).fpcal

[simmulator]

Not sure if its running better with the vtec at 4000, maybe needs some tweaking. I'm thinking it might have a little more power on tap when doing a quick highway pass and downshifting 5th or 4th since the vtec kicks in quicker, but still not sure if its really more responsive or not. Caused some knocking again when I logged a drive to work. My apologies the file is large but it should have some good data including a WOT 3rd pull. Had to use wetransfer because of the size since the drive was about an hour. Let me know what you think based on the data and thanks again!
https://we.tl/t-jbVxjx61dG

[EFICU]

Yeah from what I see it doesn't seem to take off as well at 4000. The fuel demand is down on the crossover when you look at fuel table values and injector pulse. At 5000, the fuel table values are almost exactly the same and the injector pulse is very close, actually just a slight increase in both at 5000 for vtec which is good. When utilizing the theory that more fuel and air equals more power, that would tell us there is a dip in power at 4000. The high cam doesn't demand more fuel than the low cam until 5000 rpm, which is generally where you want the crossover, the point of equal demand between high and low cam. You could try 4600 if you want, but the data is showing a dip in demand, so not sure it's going to net you the feel you want. With the factory DP, you are sort of limited on getting too much and being able to lower vtec effectively. But again, it's all about your feel and wants, so just let me know. We can try 4600 if want.

And yes, all the knock happened between 4000-4800. None of them appear to happen in the areas we tuned prior, so that is good. And the fueling looked good throughout. So just let me know on trying vtec at 4600. If you're happy with it at 5000, then make another datalog with Rev06 this weekend and we will see how it looks.

[simmulator]

Okay based on that I figured rolling with the 5000 crossover is probably the best move. Put down another quick log. Had some knock with WOT on 4th it looks like. Let me know if there's anything else you want to see on another log. Also noticed the revs jump a bit more on cold start now that the weather has turned, not sure if its really anything to be concerned with.

EFICU Tune Rev06 Short Drive FP.fpdl

[EFICU]

Sounds good. Yeah if you get it too low it falls on it's face. Once you get a DP, or if you do I should say, it opens up a lot of possibilities.

The knock looks to be on the gear change from third to fourth in WOT, which is somewhat common on 9th gens. I made a couple adjustments to stop that hopefully. We'll keep an eye on it.

I'll keep looking at the cold start for you. I see the idle jump a little, but trying to adjust that small window only where it does it might be touch. But I will keep looking at it. Other than that it's looking good. Test this next one when you can and we will see how it looks. Just keep driving it like you have been, or like you normally do, and we will see how it looks.

simmulator.SD.Rev07 (Blended)(Vtec5000).fpcal

[simmulator]

Got another log down. Sorry its a long one again but I think it has some good stuff to look at while I was on the highway for a bit there. I can always try and log another one with the WOT pull and more high rev/low gear driving if that would be more ideal. Let me know what you think! Really appreciate your help as always.
https://we.tl/t-6eFONerLyU

[EFICU]

Looks good. We had a couple knock on one third gear pull, but not on the other pulls. I went ahead and touched up the timing anyways though just to be safe. It all looks good, basically just looking for no knock still on this next one. Take it for a spin when you can and we will see how it looks.

simmulator.SD.Rev08 (Blended)(Vtec5000).fpcal