Hondata

EFICU wrote: Tue Feb 08, 2022 11:20 pm Sorry, I was away from my computer. Not bad for a start, for datalogs now, we need to shoot for 20 minutes in length and we need to do one wide open throttle (WOT) pull in third gear from 2500-7500. Vtec will be at 5500 on this first one.

Sebastian.SD.Rev02 (0Cam)(Vtec5500).fpcal

EFICU wrote: Wed Feb 09, 2022 12:44 am The rev hang is off, do you want it on? We can put it back on if you want, just let me know. Most guys don't, so I turn it off by default.

That one looked pretty good, I made some part throttle fuel changes and a bunch of WOT changes. Same thing for this next one, 20 minute or so with the one WOT pull in third from 2500-7500. It will definitely feel better once we move up in cam angle, right now being on the 0* cam angle means it's the least powerful. Vtec will be at 4000 in this next one.

Sebastian.SD.Rev03 (0Cam)(Vtec4000).fpcal

EFICU wrote: Wed Feb 09, 2022 1:39 am Sounds good, we'll leave it off. We will now move to the 10* cam angle with vtec back at 5500. Take this for the same type of datalog and drive with the one WOT pull, then we'll see how it looks.

Sebastian.SD.Rev04 (10Cam)(Vtec5500).fpcal

EFICU wrote: Wed Feb 09, 2022 2:41 am There isn't one cam angle necessarily, it moves around to try to provide the best power at all times. For part throttle, most likely around 15-18*, then it will ramp up for vtec to 25* and then taper to around 8* or so at redline. Since you're all stock engine wise, it really tapers on the WOT pull since you don't have any mods. But we tune each cam angle so we have the right data to build the cam angle map and all that.

It looks like we will have to pause everything for a minute. I need to look over that last datalog a little more, it appears as though the primary o2 sensor may be failing. For now, I am going to give you a new revision of the 0* cam angle map so you can drive it with no issues right now. But I need to look over that last datalog a little more, something isn't right. How many miles are on the car itself, not the engine, but the car?

Load this one in it, and you can drive it without any issues. Don't drive it too aggressive, if the sensor is failing then we have it on the rich side which is better than lean, but it would be best to not drive it aggressive for right now. I'll get back to you later today and see what I can come up with. Sorry to ruin the excitement, but I want to make sure it's right for you. You don't need to make a datalog with this one either, it's just for you to drive on right now to get around if needed.
Sebastian.SD.Rev03.1 (0Cam)(Vtec5500).fpcal

EFICU wrote: Wed Feb 09, 2022 2:48 am Did you guys use your stock K20 exhaust manifold and cat? You are using the stock K20 o2 sensor, not one that came with the K24?

EFICU wrote: Wed Feb 09, 2022 11:53 am Well after looking at it, if it's not a failing o2 sensor I'm not sure what else it could be mechanically. My only issue is it's not failing in the normal manner I've seen. Thinking back, I have seen one fail this way, but it's not as common as the way I've seen in my experience. If I were to add the fuel right now that it shows to add, it would max the fuel injectors for sure. That doesn't make sense at all with a stock K24. The only thing I can recommend is to replace the primary sensor. I will post the part numbers for the three I've worked with and have done well. One is the OEM option, so you can pick which one you want and go from there. Just be sure to get them from a reputable place so you don't receive a cheap knockoff.

--Bosch 13940 Primary O2 https://www.rockauto.com/en/moreinfo.ph ... 4625&jsn=3
--Denso 2349076 Primary O2 https://www.rockauto.com/en/moreinfo.ph ... Ftu0oOwOHh
--Honda OEM: 36531-RRA-013 https://www.bernardiparts.com/Honda-SEN ... A-013.aspx

I don't really know what else to recommend at this point. I don't see anything else glaring at me in the calibration or datalogs to cause the issue. If we throw a new sensor in it and reinspect, at least we know we're working with a known good sensor. If the problem persists, then we would have to do some searching mechanically.

Let me know what you think.

EFICU wrote: Wed Feb 09, 2022 1:57 pm Okay, just let me know. If money is tight, you can hit up your local Honda wrecking yard and see if they have a used one for an 06-11 Si. They shouldn't charge you more than $25-$40, it might be worth a shot for testing. It's still up in the air, but the odds of two failing this exact way is pretty low. Just be sure to double check part numbers if you find a used one, that way we know it's the right one.

Sorry for the headache man.

EFICU wrote: Thu Feb 10, 2022 5:33 pm Yeah you would want the K20 primary o2 sensor so that’s good if it’s still there. It just doesn’t seem to be reading properly though. The TSX o2 sensor is probably a different calibration, I haven’t compared part numbers.