This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

No dyno! How to tune?

tourist

tourist

Joined Nov 2012
2K Posts | 821+
Iceland
So I live on an island in the middle of the ocean. I don't think there's a motorcycle dyno anywhere here. There used to be before 2008 when our snakes-in-suits guys stole your pension funds and there was a "boom" or an "upswing" and everyone had toys out the wazoo, but then the crash came and the one dyno we had was confiscated along with a tattoo gun and a couple Range Rovers in a private-market drug debt settlement - that's afaik how that story went.

So I'll have to do without a dyno!

Let's say I get a Bazzaz for my 570. How far will I get by seat of the pants tuning?

How far will I get by seat-of-pants when tuning for a bigger throttle body?

How useful would an exhaust gas analyser be? And what type would be good to get? And how much should I pay for one? :)
 
  • Like
Reactions: 1 person
A bung on your exhaust unless you already have, oem has one.
Get a innovate LM2 unit to read and record afr, adjust accordingly.
It will be as good as a dyno, you just wont get to see the numbers.

Did that before having a dyno.
Let me know if I can help furher.
 
Last edited:
  • Like
Reactions: 2 people
Lovely. Thanks.

I'm naive enough to be at the "will I break it?" stage - much like the people I'm teaching how to program :) The assurance that it roughly makes sense is valuable.
 
If you can get it to run at a lean or rich enough condition to do damage you'll be doing well, use the AFR guage, and listen to the bike it will tell you what it wants.

Hell I was crazy enough to. Do it on 610 cc and a cam! Fwiw, I used mig to attach my sensor bung, its still hanging in there.

If you have an old laptop you can log and tune on the fly, just whack it all in a back pack and go touring and tuning!
 
  • Like
Reactions: 3 people
I would like to recommend to start with getting the preignition straight! If you do not have the advance where you want it (34-36 deg in my case), the engine will not answer properly to jetting. Innovate works just fine as earlier mentioned. Place the sensor 150-200mm from the exhaust valve. Too far out in the exhaust system and the pulsations will suck in to much fresh air and screw up the measurement.

But dyno or onboard accelerometer is king when evaluating different go-fast-thingies!

BTW, my Megasquirt III-system can autotune when driving, without any external computer. The logging feature (including AFR-signal) make it possible to adjust the fuel chart in the comfort of your garage! :) This was not possible with my Microsquirt system. The track-day clerks was not very impressed with me flying past on the straight with a backpack! :rolleyes:
 
  • Like
Reactions: 3 people
Interesting!!

- How difficult is it to move from the OEM EFI system to a Megasquirt? I understand the theory behind it, but I draw a bit of an uneasy blank when it comes to the part where you hook up a new EFI computer with no map to start from? Or is that nothing to worry about? I.e. if I guesstimate a map for the Megasquirt, can it be so far out that I hurt something? (I assume the answer is "probably not" :) but it'd be great to get it confirmed.)

Please bear with my naive questions! :) Thank you for everything so far, it's very useful!
 
This is a good thread for me to follow. I will soon embark on my first ECU tuning myself so this is spot on! So I will add to tourists naive questions!

First ones from me are about sensor placement as I will install one on my doma system.

Is there a downside of installing the sensor closer than 15 cm to the exhaust valve? If so is it due to sensor input or a practical issue from cables and hot cylinder?

I know that it should be installed upwards to avoid fluids getting caught at cold start, but why the 15 deg angle from the top as shown in this guide?
http://www.bazzaz.net/instructions/O2sensor-data-sheet.pdf

Thank you!
 
Well... Setting up a Megasquirt-system from scratch is something I might pull off now that I have done it once. Knowing the magnitude of the challenge, I would never have done it on my own again (if it was the first time!). I could write a whole book about it, and still only cover ONE application. It was very fortunate that I discovered a guy that had built 300 Megasquirt systems, 25km from where I live!

Getting started with a decent fuel and ignition map, without damaging anything or setting the workshop on fire, is not that difficult. Being careful and paying close attention to AFR, will not be the largest hurdle.

I hope you guys take it the right way... I will not support you with building, setting up or tuning in an EFI. There are TONS of questions, choices and compromises along the way, and I do simply not have enough time to write about all those considerations and answers! Sorry!
 
  • Like
Reactions: 2 people
Absolutely taken the right way!!! Asking potshot questions to get a feel for what's what - and this has been a very useful thread already.
 
  • Like
Reactions: 1 person
It's not taken the wrong way as I never expected anyone to do the job for me.
But as you say there are tons of questions and that's why a forum is good. So people can share their thoughts and information. I'm not expecting any answers or support from anyone but not much is needed, when you have nothing it's difficult to know what to start googling. This thread already have some good answers that will help me on the way, and that is much appreciated!
 
  • Like
Reactions: 1 person
Can anyone give an example of an accelerometer that can be used on a bike? Tried googling but mostly found suspension tuning links. Thanks.
 
jon andersson said:
It's not taken the wrong way as I never expected anyone to do the job for me.
But as you say there are tons of questions and that's why a forum is good. So people can share their thoughts and information. I'm not expecting any answers or support from anyone but not much is needed, when you have nothing it's difficult to know what to start googling. This thread already have some good answers that will help me on the way, and that is much appreciated!
Click to expand...
Have a look in the vast forum for MS Extra, the EFI SW for Megasquirt! I believe that "all" answers are in there, just a matter of finding it! :)

Megasquirt Support Forum (MSEXTRA) ? Index page
 
  • Like
Reactions: 3 people
Ill stick my neck out and say it isnt too difficult. It takes engagement for one and time for two, but if you are obsessed that wont be a problem would it?
Its a lot to learn and none of them are difficult, time and swearing thats all it takes. Ill try and help!
 
  • Like
Reactions: 4 people
before i got a 5 wire o2 sensor and data logger i used a beach a gps and tall gearing, faster top speed = more power.

at the time i was given the following advice from a very experienced fellow who made carb needles by hand for many of us; rely on WOT top speed as an indicator of performance, careful with the gearing, peak torque is found lower in the rpm than peak power and requires slightly richer mix.

it helped at the time and was a lot of fun, 180-185 on wet sand with 30klicks lost to wheelspin makes a nice rooster tail :D
 
  • Like
Reactions: 2 people

Similar threads

T
Just a little feedback on my tuning adventure on 570FE.
Replies
2
Views
2K
TomTom
T
K
Fuel injection mapping newbie
Replies
6
Views
3K
maKe
M
S
Husaberg SM Review On Motorcycle.com
Replies
0
Views
2K
supertireguy
S

Register CTA

Register on Husaberg Forum! This sidebar will go away, and you will see fewer ads.

Recent Discussions