Hondata

I definitely want to get an OEM and run it just to see if there’s random knock I’d rather buy it and still have 0 but at least have no questions in if I’m taking care of my engine. It does appear that it could be working but not the same as an original and I’d just like to be sure. I will load this one and get you the data log! I just wanted to ask so I know for myself and In the future is starting vtec at 4600 what you’ve found to be the best or smoothest? I notice some start at 4350 so I was just curious. And if you adjust the vtec on these maps you’ve sent me will it throw other things off? I really appreciate all the help.

Okay sounds good. Yeah then once you get the sensor in, I would say make a datalog before putting it in and one after, that way you can compare apples to apples. And keep me in the loop on it, so if it does show knock with the OEM sensor we can get rid of while you wait for your other parts.

So vtec engagement I make on an each car basis. Since we're doing a quick tune on yours, I chose 4600 to start. If you decide to have me help you tune it once you get your header and stuff, we go through and tune each cam angle one by one, then we use the fuel tables to find the optimal vtec point. There is no one rpm range for the entire platform, and should be looked at on a case by case basis. Sort of like how you would on a dyno, only we use the fuel tables to make that decisions as fuel tables have a similar shape to a dyno graph when done right. More fuel demand, means more power. We also look at injector data at the engagement RPM to make sure the fuel demand rises on the crossover. If the fuel demand dips, then the power is dipping and defeats the purpose of vtec. Looking at your datalogs, 4600 seems to be okay but we might try 4900 which might work better.

The way your calibrations are, you can go anywhere between 4300 and 5500 with lower vtec threshold and not cause any issues, besides the fueling be off a little bit. That is again why the proper way, we tune each cam angle one by one so all tables are dialed. But you also don't want to move it around too much because I try to make the cam angle rise smoothly so it can follow cam commanded properly But if you want to play with it on the lower threshold from 4300 - 5500 you can. Don't play with the upper threshold, vtec has to engage by a certain RPM to avoid valvetrain damage.

Once you get your header installed, vtec will most likely move down to 4100-4300. Since you have the stock cat, it won't like a super low vtec from a data standpoint. If you want it to turn on down low for fun, that can be accommodated, but it will suffer performance wise. If you want to try a different vtec rpm, let me know what you're thinking. We can try whatever you'd like

I will definitely let you know when I change it out for OEM and give you a datalog! That will be pretty soon depending on when I can obtain an OEM sensor. I am happy with the VTEC now and how smooth the car is pulling I dont think I want to mess with it but maybe when i get the headers and exhaust we can mess with it lower than 4600. I did like it kicking in around 4300 before but we can do that once headers are on. Heres todays log.

Sounds good on the sensor. As far as vtec rpm, that's why I like to tune these the proper route where we tune each cam angle one by one then use all that data to build cam angle mapping and vtec rpm. However, I found that I would spend a week or two tuning someone's car and then two weeks later they would add another part and have to redo the whole thing. So I sort of went to a short route program when parts are already planned in the near future so you can have a safe and fun tune while you wait for more parts, then spend our time on getting everything right once the package is complete for the foreseeable future. This way it saves a lot of wear and tear on your car, and both our time so we are spending the time when the package is complete. Once you get the header on, vtec will almost for sure be moved down to at least 4300. The header is the biggest piece of the equation to allow for lower vtec rpm and more cam duration in vtec. You already have one of the top intakes, so the race header will really help to open it up and they will compliment each other.

So that last datalog looked great. Part throttle trims are great, WOT fuel is dead on target. You're good to go for now with that latest revision, just keep me in the loop on knock sensor. Try to make a before and after if possible. You can do the before datalog the night before, that way you don't have to replace the sensor while the engine is hot. Then we can compare both and see if I screwed up or if it was the right move. If some knock shows up with the new sensor, keep making a normal datalog like you have been and post it so I can review it. Then we'll work on that, and get it good so you're good to go until the header arrives.

That makes sense I definitely don’t want to waste your time that’s why I was like yeah we can just do it al once I have all my mods! Everything is feeling good right now I appreciate the help. I’m looking in to an OEM sensor and will for sure make a before and after for you!

Gotcha. Yeah I even though this stuff is quick on my end, it still feels right to spend the time when we have all the parts that are planned in the near future. Just keep me in the loop, if something comes up or you have a questions just let me know.

Just giving an update I received my OEM knock sensor today so I’ll be sending a data log of that soon and see if it’s different from the old one! Also my headers are on the way but shipping is slow.

Sounds good. If you haven't installed it yet, try to make a before and after datalog if possible. If not, no big deal.

I apologize I was excited to work on my car and threw in the sensor without thinking about the before data log! But here is today driving with the new sensor, definitely seeing a bit of knock so kinda scary to me. Does the level look more normal now?

Yeah the knock sensor reading seems more lively, almost like it samples faster than your other one it seems like. That's kind of a bummer you didn't get a before and after, but that's okay. Go ahead and datalog this next revision, I made some changes for the knock you have here. On the datalog, make your normal third gear pulls, and throw in a fourth gear pull from 3000-7000 if you can. We'll try more load and see how it goes.

Is the knock control at 80-90 percent concerning?

That's because it's seeing the knock. Once you drive it knock free over time, it will go down to about 56, which is the lowest limit really on 8th gens. It was down to 72 and then it saw the knock happen so the knock control went up like it should. We'll see how it looks in the next one.

Here is the log from that calibration. Control did lower so thats nice.

sorry it didnt attach, here it is.

Yeah it looks really good. I think the new sensor is definitely working better and the fact that we got some knock on the first drive with it sort of proves that I would say. But now it looks great. There is no knock retard happening on part throttle with it at 56, so that's great.

All the fuel trims look good and the WOT fuel looks great. Go ahead and keep datalogging over the next few days and make sure it stays knock free. If you see any knock let me know and post the datalog. Other than that, I think you're good to go for now while you await your header and exhaust. If you still want my help when you get the header and exhaust just let me know, we'll go through and do a complete tune like I mentioned originally in our talks.