Need base map for 2019 si with mods.

[CitizenSoldier]

I need a base map for my 2019 Honda Civic Si. I have a prl race intake. Prl front pipe and exhaust with a muffler delete. I've noticed that my car has been running lean with the preset tune with my flash pro.

[EFICU]

Can you post a datalog and your calibration? Some of us on here can probably help you get it a little more dialed in.

[CitizenSoldier]

Yes, I'll try to post it as soon as I get a chance. Thank you very much.

[CitizenSoldier]

attached is my current calibration and a datalog. Please let me know if you need any more information.

[EFICU]

Hi CS,

Have you made any changes to your tune at all? It looks like the MAF scaling is already bee changed to a PRL calibration which is why I ask.

Let me know.

[CitizenSoldier]

Yes, I added the mods that I have but haven't changed anything else. The issue that I'm experiencing is when I'm in a high gear at fairly low rpms and I accelerate hard my rpms will increase but the car wont increase in speed. It almost sounds like the clutch is slipping but I don't think that's the issue cause I don't have any problems when shifting gears. I also get a slight bog when shifting into gears.

[EFICU]

Okay, what changes did you make to the tune? You changed the MAF scaling values?

[CitizenSoldier]

I haven't messed with any values at all. All I've done is choose my mods on the mod list.

[EFICU]

Gotcha, okay. So the issue with the RPM'S going up but you aren't accelerating, is the issue around the 4:24 mark in your datalog by chance?

In looking at your datalog, in my photo below, the red line is the RPM and the blue line is your MPH. Just before 4:24 you give go wide open throttle in fifth gear and the RPM spikes up but the MPH barely moves at all. I don't have a whole lot of experience with slipping clutches in datalogs, but it looks like it may be a possibility. If you look at the 5:50 mark, you make another pull in fourth gear and the rpm is a lot more linear to the mph line. It looks like it might have an issue with the clutch, which sounds like your concern you had.

CS RPM.JPG

Here is the photo from the 5:50 range, so you can compare it with the spike in the first photo.

CS RPM 2'.JPG

Let me know what you think. I also have a few things we can try on your tune as well. But I figured I would see what you think on this to start and then move on to the tuning stuff.

[CitizenSoldier]

Yes, that is exactly right. I'm curious as to why the clutch would only slip or have any issues in that scenario. For instance I can do a pull in 3rd gear which I believe is where I have the most power? But I don't experience any issues with the clutch? I'm just racking my brain cause I know a bit about cars and I've driven manual my whole life but I'm a noob when in comes to tuning. I also just want to thank you very much for you taking time out of your day to help me. I really appreciate it a lot. My car is still pretty new and I would hate to mess something up especially if it can be prevented.

[CitizenSoldier]

Also, the other day my car started flashing a check engine light and my car went into limp mode. I had to pull over and shut my car off to fix it. Do you know what could have caused that?

[EFICU]

Yes, that is exactly right. I'm curious as to why the clutch would only slip or have any issues in that scenario. For instance I can do a pull in 3rd gear which I believe is where I have the most power? But I don't experience any issues with the clutch? I'm just racking my brain cause I know a bit about cars and I've driven manual my whole life but I'm a noob when in comes to tuning. I also just want to thank you very much for you taking time out of your day to help me. I really appreciate it a lot. My car is still pretty new and I would hate to mess something up especially if it can be prevented.

So in higher gears, and lowers RPM's, when you go to accelerate hard the clutch is actually under a lot of load, more so that in lower geara. When you are in fifth gear at a low RPM and attempt to accelerate hard the clutches clamping force is tested because the load is greater. In the lower gears, the load on the engine and the clutch isn't that bad honestly. But in your case, where you are seeing that possible clutch slippage, the clutch is under more load than say a wide open throttle pull in first and second gear. If a clutch is going to slip, it's honestly in places like yours appears to be slipping.

Also, the other day my car started flashing a check engine light and my car went into limp mode. I had to pull over and shut my car off to fix it. Do you know what could have caused that?

I didn't see any codes in the system. So unfortunately I couldn't tell you what that is. Some models it can be commanded to do that when it sees engine knock, but I don't see that option available for your car.

So I went ahead and made a couple small changes to your file. The main thing you didn't have checked or scaled was the MAF sensor for the PRL race MAF. The design of the PRL race MAF requires some scaling to dial in the fueling for their housing. I changed the scaling over to the PRL scaled MAF from a Hondata tune. I also changed to MAP to determine WOT for you as well. That should help some of the lean fueling you see and should perform a little better as well.

Attached below is the file for you. Once you upload it, make a datalog soon so we can look over everything. It may still need some adjustments, so don't go driving on it for days without seeing how it looks.

CitizenS.9psitune.Rev01.fpcal