Hondata

2015 civic si, stock motor, DC SRI, DNA Catback. Currently running on a slightly modified base tune and looking for someone who can look over a few data logs and possibly provide a revision or 2. having knock problems in vtec ranges and air-fuel is not fully stable. thankyou in advance. i can provide any datalogs you need.

Go ahead and post the calibration you're running and a datalog with you driving for roughly twenty minutes so someone can take a look at them. Then outline things like octane fuel you run and the exact things that are concerning you. If you have some current datalogs, you can post those to try to get an idea of your concerns.

ended up just flashing the base MAF tune on 93 oct to go take this log. still having knock in vtec cross-over. fuel trims seem to be within the +- 8 but would like to be within +-3 and idle is surging from 1200-2000. just looking to get the most power and reliability out of the base tune without a dyno.

Mostly casual driving with some hard pulls to show upper ranges

Yeah the knock is no big deal at all. The bulk of it is happening right before vtec, so that's an easy fix. You had a couple knock in vtec one time. There are a few knock being caused by your rev matching on downshifts. I think 2 or 3 were caused by the rev matching spiking the load on decel which caused it to transition to high load with too much timing. For the sake of datalogging right now, you might hold off on rev matching so we can look for true knock and remove that.

So your fuel trim goals will be tough to realistically hit at +-3 because, in the basemaps the commanded AFR is always "hunting" as I call it. Meaning it's always moving the goal post so to speak. We generally want the ECU to command 14.64 at part throttle all the time to provide the smoothest drive and best fuel economy. Because of that hunting, you will get a false feeling of success only because they are hunting each other instead of trying to hit target. Sorry it's sort of hard to explain. The wide open throttle (WOT) fuel is very rich too, so a lot needs to be addressed on the fuel aspect.

To get the most power out of these without a dyno, you really have to go in and tune each cam angle one by one and then use that data to build a cam angle map that suits your car. Same with the ideal vtec rpm, only by tuning all cam angles can you gather the necessary data to make those decisions. Similar to how a proper dyno tune would.

Do you have plans for more mods in the near future? In either scenario, if you want, we can transition you to my stuff and tune the car for you. If you want to stick with the Hondata basemap I can get it as good as I can, but I can't do much on power of course because we're using the Hondata basemap. My focus would be to get the fuel trims as good as possible and the WOT fuel of course.

I'm going turbo in a few months so that's why I don't wanna waste time and money on a dyno until then. but no other mods until them. whats all involved with tuning with your maps because that sounds more promising than base maps

Yeah that makes sense, going turbo changes everything.

Switching you to my stuff is really easy. I have a lot of cars with similar mods to you, so we can start you on this basemap to get going and dial it in for you. I went through and checked your datalog for ignition where it knocked to prepare this file ahead of time. So it should be pretty good from a start, it has less timing where you had knock. So load this one up when you can and take it for a drive. Shoot for twenty minutes of stop and go driving, and make one WOT pull in third gear from 2500-7500 so we can work on the WOT fuel. It will be close, but we should be able to dial it in over couple revisions. That way you can have some fun with it while you wait for the turbo to go in.

ill load it up now and take it for a log!!!

Sounds good. We'll see how it looks.

Car felt good!! idle is still pulsing but i believe that will go away after a few cold starts and first gear throttle was really touchy almost bucking . was weird downshifting without revmatch, did my best of that. no other major concerns that I saw.

Can you double check your datalogs, this datalog wasn't made with my calibration. You might double check the right calibration got uploaded to the ECU just to be sure. Either way, this datalog wasn't on the first calibration I posted for you.

Let me know what you find.

was the only calibration i had uploaded and was the only datalog I had on flashpro. ill reupload and go run it again.

Yeah then double check the upload, or just re-upload my file and take it for a spin. It's almost a carbon copy of your first datalog. I have long term trims turned off, and in the datalog it has then on. Not to mention the cam angle map in my calibration isn't tracking as it should in the datalog. No big deal, other than gas prices aren't friendly for this stuff. Sorry man.

No joke on the gas prices lol. but not a big deal this one should be the right one

Yeah it looks good for a start. The normal area for knock on 9th gens popped up, so I made some changes for that. Something is going on at idle, it's a little strange. The DP is 100% stock, there hasn't been any changes?

On this next one, try to find some places to let it idle for a few minutes here and there so I can see it. The idle I saw here, the fuel trims weren't engaging which is a little strange. And the idle was high, almost like there is a vacuum leak or something. But we'll keep an eye on it.

Take this one for a spin when you can.

no i haven't changed anything on throttle or tune. and ya the idle is still bouncing from 1200-2k. ill load the next one and try it out