Hondata

Right, yeah the actual cam angle has a very hard time chasing cam commanded when it's all over the place. Once you smooth everything out, the VTC can follow it's commanded values much easier which makes fueling and ignition much more on target. Same as Nick talks about, when he says 40* at vtec and tapers to xx* at redline. He is referring to the same thing.

Let me know how it goes.

Hello, I've only had a few short trips lately. Just haven't had time to try and datalog but overall is feels good.
Getting use to the 4100rpm VTEC. I would normally shift around there but trying to tech myself to shift before that point. When I get on it though its great having the VTEC point there. *thumbs up* Weather cooled off quite a bit in the last days and a bit. Sunday is was 25 Celsius and right now it is 0 and its snowing. lol Makes me just want to stay home. Maybe in the next day or so I will run a log. :o)

I was just looking at the map and trying to understand it all. On the high cam chart. the 4500 row. Should that row all columns be 0 if VTEC is set at 4100? I'm just trying to make sense of it all. I downloaded the Hondata app and one of the values I watch is cam angle. It doesn't look like there are any issues. Just curious. Thank you!

afauser wrote: Tue May 18, 2021 10:08 pm Hello, I've only had a few short trips lately. Just haven't had time to try and datalog but overall is feels good.
Getting use to the 4100rpm VTEC. I would normally shift around there but trying to tech myself to shift before that point. When I get on it though its great having the VTEC point there. *thumbs up* Weather cooled off quite a bit in the last days and a bit. Sunday is was 25 Celsius and right now it is 0 and its snowing. lol Makes me just want to stay home. Maybe in the next day or so I will run a log. :o)

Sounds good. VTEC won't always engage every time at 4100, so don't worry about shifting before that. You have an upper and lower limit on the VTEC engagement to where VTEC will come on. You have to meet certain manifold pressure and RPM setting to get it to engage. On your next drive, just run light throttle up to 4500 rpm and you will see VTEC won't engage. Then do it again will heavier throttle and you will find the pressure you can give it before VTEC will engage. You have to be pretty close to full throttle for VTEC to engage at 4100. Now at 5400, it will come on no matter what because that is where I set the upper limit. I can raise the pressures too, so if you are engaging VTEC too easy at 4100, I can raise the pressure which means you have to give it more throttle for VTEC to come on at 4100. But you certainly don't have to shift before 4100, run it up past there with light throttle and you will see it won't engage.

afauser wrote: Tue May 18, 2021 10:21 pm I was just looking at the map and trying to understand it all. On the high cam chart. the 4500 row. Should that row all columns be 0 if VTEC is set at 4100? I'm just trying to make sense of it all. I downloaded the Hondata app and one of the values I watch is cam angle. It doesn't look like there are any issues. Just curious. Thank you!

Not sure what you mean on the high cam chart? The cam angle chart?

K now it all makes sense. I did notice that VTEC came on after 4100 at times and now that you say that I do remember seeing that setting when I was first playing around with flash manager. I did try it out this morning-the lighter throttle application. Was about 5000rpm when it came on. So much to learn!

Yes the came angle chart. Sorry. I believe it says high speed chart in flash manager. I don't have my laptop with me right now to confirm. But I feel like your first response answered that question too. Thanks

afauser wrote: Wed May 19, 2021 6:40 am K now it all makes sense. I did notice that VTEC came on after 4100 at times and now that you say that I do remember seeing that setting when I was first playing around with flash manager. I did try it out this morning-the lighter throttle application. Was about 5000rpm when it came on. So much to learn!

Yeah with i-Vtec, the upper and lower limits make it really nice. Before, on say a 2000 Civic Si, Vtec came on at a certain RPM no matter what. i-Vtec is nice because you have the luxury of being able to lower it without engaging VTEC without the right thresholds. It might have come on at 5000 because you met the thresholds. As you go higher in the RPMs above 4000, we taper the threshold setting so that you are guaranteed to be above that threshold all the way to redline. You don't want it to kick out of VTEC at 7000 RPMs while you're full throttle. So, I run the threshold very high at 4100 RPMs so it doesn't engage easily under part throttle, then I taper it towards redline so it engages and stays engaged at higher RPMs. I can raise or lower the threshold at 4100 RPMs if you want it to come on easier, or come on with more throttle. It's up to you, so play with that and I can make adjustments if you want.

afauser wrote: Wed May 19, 2021 6:40 am Yes the came angle chart. Sorry. I believe it says high speed chart in flash manager. I don't have my laptop with me right now to confirm. But I feel like your first response answered that question too. Thanks

Gotcha, no you definitely don't want any 0's in the high cam angle chart. I only run the cam angle at 0 for idle and just off idle, other than that I try to keep it consistent throughout your drive so you're not passing through different fuel and ignition maps. Same with how the cam angle ramps up right before VTEC, and then the taper is nice and smooth. If you have a datalog from stock, watch how much the cam angle bounces around and chases the cam commanded angle.

I knew i-VTEC was a step above good ole VTEC but I had no idea about the all the extra things you had mention that will cause it to engage or not. I worked for Honda for 12 years and we never went into that side of things. Either it worked or it didn't. Diagnose why it didn't and send it on its way.

I noticed something a bit odd when I was running the Hondata app tonight.I had a knock count of 2 sitting at a red light. Went green accelerated "normally" up to 90km/h cruised for a minute or so then noticed the knock count was up to 20. Unfortunately I was not running a datalog when this occured. Hoping it was just a one time thing. I'm sure there could be multiple reasons why it would have done that.

I have one log from tonight but it was a lot of steady speed. No chance to do a 3rd gear pull though.

afauser wrote: Thu May 20, 2021 9:46 pm I knew i-VTEC was a step above good ole VTEC but I had no idea about the all the extra things you had mention that will cause it to engage or not. I worked for Honda for 12 years and we never went into that side of things. Either it worked or it didn't. Diagnose why it didn't and send it on its way.

I noticed something a bit odd when I was running the Hondata app tonight.I had a knock count of 2 sitting at a red light. Went green accelerated "normally" up to 90km/h cruised for a minute or so then noticed the knock count was up to 20. Unfortunately I was not running a datalog when this occured. Hoping it was just a one time thing. I'm sure there could be multiple reasons why it would have done that.

I have one log from tonight but it was a lot of steady speed. No chance to do a 3rd gear pull though.

Yeah i-Vtec is pretty great how it gives us a lower and upper limit for the engagement. I get people who ask me about tuning and think it's like a dealership does. I say, no, there are things I do they can't, and there are things they do that I can't. Haha. Like you say, you guys might flash stuff but you're not making adjustments to the tune.

Interesting for sure. Did you happen to recently get gas prior to the knock you saw today? We can't control ignition through the tune with Hondata, so it's most likely not an ignition issue. Might be something mechanical, or just a fluke. The 20 knock would have been good to see, though you only had five in this datalog. Some of the knock were in your 6th gear driving, so I slows the ignition down in that range to keep it happy. Other than that it looks really good. We'll keep an eye on the knock moving forward.

Here is the next one.

I fill with fuel 2 or 3 days before. I've also noticed my fuel mileage on this tank is kinda bad. That can be a number of things though. Driving habits being one of them. I drove a bit today. No crazy knock like Thursday evening. Just a few on each drive if any. I also started to datalog each drive just incase something wacky does happen again.

afauser wrote: Sat May 22, 2021 9:44 pm I fill with fuel 2 or 3 days before. I've also noticed my fuel mileage on this tank is kinda bad. That can be a number of things though. Driving habits being one of them. I drove a bit today. No crazy knock like Thursday evening. Just a few on each drive if any. I also started to datalog each drive just incase something wacky does happen again.

Gotcha. Yeah keep an eye on it in the meantime. Seems like the fuel in Canada can be a little hit or miss in my experience. Keep making the datalogs and when you see the knock post them up or email them to me. Then I can see if the trends show one place as being the culprit, or if the knock is happening in multiple places.

I haven't seen any knock come up in the last couple days. I drove across the city tonight and made a couple logs. Overall the car feels great right now. Just waiting for that test pipe to show up. I think 2 weeks or so until it arrives. Thank you

Yeah we had some knock in the B datalog on your 6th gear drive. How much longer until you fill up with gas again? I hate to make a bunch of ignition reduction if it is bad gas you know. If you're filling up soon, we might hold off on making ignition adjustments until then and reinspect. But let me know.

I filled up this morning. I'll try and get out for 20 minutes drive tonight. Should be easy enough to incorporate some cruising and regular city driving. Hope that will be good enough. If it is the same result we can just leave it alone until i get the pipe in.

Just received an email that the test pipe cleared customs! *thumbs up*

afauser wrote: Wed May 26, 2021 8:02 pm I filled up this morning. I'll try and get out for 20 minutes drive tonight. Should be easy enough to incorporate some cruising and regular city driving. Hope that will be good enough. If it is the same result we can just leave it alone until i get the pipe in.

Just received an email that the test pipe cleared customs! *thumbs up*

Sounds good. We'll keep an eye on the knock then now that it has fresh fuel in. If nothing else, keep me in the loop when the Berk pipe shows up and we'll get to tuning on it for that.

Drive ended up being 40 minutes. Looks like a little bit of knock around 11 minutes if I'm reading it right. If that is the case I never really notice anything while driving. Must happen quick while cruising and just doesn't affect much. I'm really not sure. This is still unknown territory for me. I'm trying to learn as we go...

Thank you for all the help