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Help with tuning 2013 Civic Si 3.5" SRI

Posted: Thu Jun 09, 2022 11:41 am
by joeduhsee
Hello. I just installed a K-Tuned 3.5 inch short ram intake on my 2013 Civic Si Sedan and would like some help with a tune. Currently running the Hondata Reflash basemap that came with the FlashPro. I have a datalog and the reflash basemap that I used, attached.

The only performance mods I have done to my car are a K-Tuned 3.5 SRI and Full Race catback exhaust. Everything else is stock.

Re: Help with tuning 2013 Civic Si 3.5" SRI

Posted: Sun Jun 12, 2022 10:10 am
by EFICU
Yeah overall it's pretty good. If you're happy with how it drives it would be simple to clean up the calibration you're running. It just needs some WOT fuel adjustments and some ignition tweaks for the knock.

Re: Help with tuning 2013 Civic Si 3.5" SRI

Posted: Sun Jun 12, 2022 6:22 pm
by joeduhsee
If you don't mind, that would be great! Yeah the reflash basemap wasn't too bad actually for just having an intake and exhaust. I did notice a knock count of 21 on the datalog, so hopefully it isn't too much to adjust on your end.

Re: Help with tuning 2013 Civic Si 3.5" SRI

Posted: Mon Jun 13, 2022 8:52 pm
by EFICU
Yeah I just looked at the other datalog and it didn't look as good as the one I saw did the other day. Let's see how this one looks and we'll go from there.
joeduhsee-stock-Reflash2.fpcal
(21.11 KiB) Downloaded 20 times

Re: Help with tuning 2013 Civic Si 3.5" SRI

Posted: Tue Jun 14, 2022 10:20 pm
by joeduhsee
Here's a datalog using your calibration.

Re: Help with tuning 2013 Civic Si 3.5" SRI

Posted: Mon Jun 20, 2022 8:30 pm
by EFICU
It looks like something isn't quite right. Either the MAF isn't getting a good reading, which is possible with that intake, or something else. With a bunch of fuel added the AFR is still lean. Could be a bad primary 02 sensor. But I haven't seen that many o2 sensor failures on 9th gens.

Re: Help with tuning 2013 Civic Si 3.5" SRI

Posted: Tue Jun 21, 2022 6:02 pm
by joeduhsee
Would switching to a MAP based tune help? Based on other threads I've looked at, I'm guessing these 3.5" intakes seem to run better on MAP tuning and the reflash basemap I used ran on MAF tuning.

I feel that my primary O2 sensor is fine, although I haven't experienced anything wrong prior to installing the intake.