Motorcycle dyno tuning involves analyzing Air-Fuel Ratio (AFR) lines to optimize engine performance, where technicians make baseline power measurements, run autotune to adjust fuel delivery, and manually refine VE tables to achieve a flat AFR line across the RPM range, typically improving power output by 10+ horsepower and 10+ foot-pounds of torque.
Deep Dive
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Deep Dive
Week 2 in ALASKA! Inside the DYNO room: Before vs After TuningAdded:
Good morning, guys, and happy Tuesday or whatever day it is that you're tuning in. So, I have struggled to make this week's video with all these changes in life. So, let's just start with some bad jokes, a couple teaser clips, and I'll see you guys after coffee. Where did the butcher take his wife on a date to the meatball?
>> It's not funny.
>> Why was a little bean crying? It wanted its edamami.
>> It's really not funny.
Anytime we can hold exhaust like this shouldn't be on a motorcycle.
>> That's true.
Good morning, guys. Walking out this morning. When it's cold and wet, of course, this has become my new routine.
Bring the towel, dry everything off, get it warmed up, and hit the road.
But first, coffee.
So, we're back. Uh, we've got some work to do. It looks like I've got a job up in my rack right now. It's here for a uh dynino tune service and some spark plugs. Nothing major.
Let's drink this up right here.
It's so much fun to catch you in the middle of whatever.
This is up for a dino tune. So, first thing to do is identify what exactly is in here. It says it has a tuner in it, but we're not um we're not sure which one that is. So, I'm going to start by taking the seat off. Well, immediately these are these are missing. Let's just take a peek under here. Well, that is not a Harley battery.
>> Looks like there's a lithium battery in there. So, looks like we've got some performance batteries in there.
See what's under the side cover, shall we? We found ourselves a Vansenheind fuel pack. We're going to take this off and we're going to end up >> Well, we're going to throw it in a saddle bag, but where I think it should go is probably in the trash can.
>> Damn.
>> I'm sorry.
I'm sorry. Cuz I It was a thought. No, no, seriously. It was a thought.
>> It was a thought and I blurted it out. I did not mean it that way.
>> I'm fine.
>> Okay, but just understand I didn't mean it the way it came out.
We'll take a poll on how you meant it with people here later after the show's over.
>> Polls are now open.
>> So, for now, we'll get that out of the way.
Now, we're going to go through the process of getting an SDK file. We're going to just set this up for a Power Vision Dino tune.
long again.
>> Looks like we're making a copy.
And for those of you wondering, the copy of the current tune is a copy of what is in there currently right this minute. No modifications made. So, we're going to pull a copy out. We're going to put it in the computer over there.
And then we're going to make our changes and begin the tuning process. But first and foremost, we're going to make a series of three polls as is. Analyze the data, look at the power numbers, and the AFR line. All right, guys. I went ahead and made this pull off camera. I did three of them. These are base runs. So, we see our AFRs.
Our total power output is about 117 118. We'll just round up. So, 118 and 99.
So, let's get to tuning and then let's come back and see where we end up after the fact.
All right, guys. We just got done autotuning this. We ran it through one pass. We definitely got better output numbers already. Uh what I wanted to show you guys at home, and I just discussed this with Dylan is this is our AFR line. Let's not focus on this lean.
We're not that's not what we're addressing right now. What I want to show you is this. Can y'all see this drop off right here? That is performance enrichment.
uh at a certain point within uh Power Vision, it will kick to a default AFR setting. This one happened to be 11.8.
And if you look, it's targeting 11.8. I think that blue one pretty much hit 118.
Uh the orange one didn't quite reach 118. It actually was a little bit heavier. And uh yeah, that that brown one's right there, too. It's for trace tracking right at 118 12 118. So anyways, what I wanted to show you was that this is what an AFR can look like when most Now this is super expanded. So let's shrink this down. If you look at that, guys, it looks real flat, doesn't it? Like if if you just saw that and you didn't know, you'd be like, "Wow, that's that's damn near perfect." And it is. It really is. But I've got it super expanded. And right here, we get a little lean.
This orange line, if for those of you wondering, I don't know how much of this I'm going to put in the video, but for those of you wondering, this orange line is pull the first pole. And then the other two are second poles. Now, these are all done at temp, but this orange one has probably a little bit of starting fuel left in it. And uh it's always going to give a little bit heavier AFR. That's why we pull them in threes so we can really verify. Now, if you see what I'm seeing, guys, I'm looking as the tuner. I'm focused on this area. We're a little lean. Then we ride that line. Great. And then right here, we pick up just a little bit. We get a little lean. And then boom, we're flat. So, we're we fixed that. I'm going to make another pull. I turned all this off and corrected our performance enrichment uh AFR target. So, that line should now be flat. So, I'm going to make another pull, another three poles.
We'll look at these lines. So, let's get into that.
I want to say that I'm very happy with that.
These are great results. Let me turn the fans off real quick. We have three wonderful poles and we're going to use the third one. Even though torque is higher on this one, we're going to use 130 and 107. That's a great pull.
Let's look at that. So, that's now and that's how it came in. Not bad, huh, guys? Not bad at all. Pretty proud of that. And our AFR is nice and flat. Gets a little heavy right there. gets a little heavy right here, but all in all, that's really flat. I think this customer is going to be real happy.
Oh, there I am in the shop messing with Joe.
Now, I'm going to be nosy and check on what Dwayne's doing over here.
Looks like he's doing a service on a trike.
And then, let's be a little more nosy.
Let's go on back here and see what Dylan's got going on on his racks. Looks like he's got a rear tire on a V-Rod.
And I know exactly what that blue one is there. That's another tune. Oh, here we are loading up this bike in the dino room. Moving on to the next job. Dylan's going to open the software for me cuz I don't know all the passwords.
So, now we're just going through the process of getting everything hooked up and getting the bike ready to actually be dyno tuned. This does take a little bit. There's a lot that goes into this.
All right, guys. So, we just did some baseline pulls on this 2020 Street Bob and we ended up at 104 and 97. 103,90 97. And we had an odd pull at 99 and 95.
Those are our three baseline pulls. No tune yet. We uh only extracted the map that was in it. I went ahead and made the poll. So we can have a before and after. So now that we've done that, let's get into actual tuning and let's check out what the output is in the end.
Back to data collection. That's what I call it. Every box we fill in, it's just data.
Now, this sounds tough, and it is. This is a little tough on a motorcycle. We're letting this thing eat. Basically, we're working low RPM all the way to full throttle or 100% throttle. And then we're going to release it. We're going to let that throttle position stay at 100% and go all the way up through the RPM range to red line. Now, this acceleration is controlled by the dyno using the Eddi brake. And by doing that, we're able to process the information and collect the data that we need to collect. Those are those red boxes that you see in the PV.
Heat. Heat.
All right, guys. So, this is not something that I would normally do, but um I'm going to explain to some of you or I'm going to explain to all of you that um what we've done is we just went through a session of autotune and we're now we're looking at the VE tables and we're kind of smoothing things out. We weren't able to hit every cell. And what I mean by that is if I turn this on, when you're autotuning or tuning in general, you want to populate all your information. These are the tables we were able to hit. You can see that this cell range we weren't able to hit. So between 2,000 RPMs, this whole block we we weren't able to hit. So I had to go in and manually adjust these tables and smooth that out. And um there's a couple of there's a lot of other things that get changed in here and we're not going to go over that today. Uh maybe in time throughout the summer, we'll kind of go over what it is and why it is that we make these changes. But currently, uh just for sake of no knowledge, I just want you guys to understand that we have to go in and manually change this. The computer doesn't magically do it for us.
So, now that we've got that those tables smoothed out, let's uh let's re- sweep these cell blocks, we're going to we're going to repeat this test. So, once we get that done, we'll make a couple more pulls, and we'll begin to analyze our data, look at our VE tables, look at our AFR line, and make adjustments where need be. Another important thing, guys, I want you to understand is when you look at a dino graph and you see that line on the bottom, that line is AFR.
You know what? Since I'm pointing Oh, I can't show it right now. Anyways, when you see that AFR line, that is this column all the way over here. It's not that column or this one or this one or this one or this one or any of these.
It's only full throttle. So, we're only analyzing data in this 100%.
Where you ride is typically right in here. This is your normal riding and cruising, what we call the livedin zone, right? So, when you get your bike dyno tuned, it not only needs to be dynotuned for the max power, cuz obviously that's what we want. Uh, but it's most important that it gets tuned in that ridein zone, that lived in zone. There's a process with braking, there's step tests, there's load test, there's all kinds of ways to populate this data. I don't want to confuse you. I'm just telling you today as the summer progresses and we do more tunes, I will begin to explain what those do, how those are adjusted, why they're adjusted, and what they mean for you, the rider. So, let's get back into it.
All right, guys. So, there it is. There it is. So, we've got our top three poles. We got a 11559, a 11515, and a 11638 on torque side. Horsepower 10689, 10506, and 10479. If we look at our AFRs, this green one got a little squirly. I don't know what happened. the data loss, I guess. But if we That had our best number. But if we move that one out of the way and let's just open this one. That's a pretty flat AFR, guys. That's It's got a little wiggle right here. I'll go ahead and fix that.
We've got a little some kind of weird anomaly here.
Um, but there's nothing happening in the AFR to indicate what that is. If we look at the one right behind it, the blue one, it's better.
Um, it's still got a little ripple in it. We We definitely have a tiny amount to clean up on this uh AFR, but all in all, that's really really good. And um we got great results. So, we went from what was our first couple polls like 103 or something? I don't even remember. There we go. 104. So that's kind of what it came in with right there. And that's what it's got now. So there's a tremendous increase. We got 10 foot pounds of torque and uh well about 7 horsepower. So not bad. Great improvement. Uh we definitely cleaned up that AFR line. You can kind of see the before and you can see the after. Um, we need to, like I said, we need to tighten up this AFR just a little bit. It's got a little wiggle room. They kind of cross over each other. So, we'll clean this up and we'll fix this little bit of tipin fuel, but here's before and there's after. So, not bad, guys. Not bad at all. So, I'm going to go ahead and finish this up. I'm going to clean up these AFR tables, but I wanted you to see what autotune does for us. Autotune gets us really, really close, if not perfect. Now, I'm going to have to go in and manually adjust this. I already pulled a little bit of timing out where it was pinging. So, we fixed some of that. We got our map load normalization set. That was all set in the beginning.
Again, these are things that uh I haven't covered yet. So, I'm just saying things. As the summer progresses and as content goes on, we'll address this more and more and you'll begin to see these things and then everything will kind of make sense. But, I'm not going to give it all to you today. Today is just a snippet. So, I hope you guys enjoyed this.
This is my view every morning when I leave my BNB.
Now I'm hitting the highway with some new friends that I just met.
Rob and Jake both got dyno tuned.
They are customers of mine who have now become friends.
We ended up hitting the highway and we headed south towards Gerwood. We actually went to the Brown Bear Saloon. You'll see that here in just a moment.
Look at that. What an amazing view.
There is definitely something magical about Alaska. Melissa would absolutely love this dive bar. This is for sure her kind of jam. I miss you so much, my love. Wish you were here.
As always guys, wherever you be, good morning, good afternoon, good evening, or good night. Stay upside and I'll see you on the flip.
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