LJM said:
The 20% claim is hard believe.
I do not think I claimed 20%, but think I am close to that figure and you can believe it or not, I took my bike to several Dyno's and got before and after graphs which have been posted many times, including in this topic, although perhaps I just photo shopped them myself.
Don't forget I have ditched the very restrictive headers, had the fuelling optimised on the dyno with each cylinder being individually mapped and had the ignition mappings modified as well, the bike is about as close to perfect as it could be - and before you ask "How come your man can do better than Yamaha and their billions of R&D" blah, blah, blah...
....do not forget this bike would no longer pass the tests Yamaha have to pass to get a bike approved for road use (Noise / Emissions) and Yamaha do not set each bike up on the dyno at the end of the production line to account for different tolerances, for example most fuel injectors have a tolerance of +/- 5%, and every engine component will also have small variances so the Yamaha maps also have to be safe for the bike requiring the most fuel, which means they tend to be over-fuelled.
Is your bike a 2014 ? If so did the ecu unleashed flash make a significant difference ?
No, but assuming they get the top end fuelling as good as they did on my 2011 it should help a 2014 equally well, when the ECU-U map was flashed the dealer tested fuelling on the dyno and told me it was pretty good - but the bike would feel much better with a power commander as well (so admitted good / better than stock, but not perfect)
CJS Who did the custom flash also said the fuelling at full throttle was pretty decent (and far better than the stock map), but it was quite poor at other throttle openings. (and you will see that ECU-U do state that adding a PC or similar is required to optimise the setup.
Maybe better throttle response or torque gains ?
Throttle response is tricky, ECU-U ramp up the throttle, now when you turn the throttle around 50% the throttle plates open about 50%, with ECU-U they probably have the throttle plates open 50% when you have only turned the throttle grip 30% - so is this more responsive in your book :question:
If you have more power at the same rpm you must have more torque - the laws of physics tells us this ::008:: If unsure google Power Vs Torque.
As I said before on my 2014 the power band is very linear no flat spots so I'm not sure spending 500 + on a reflash is worth it.
If your not spending 500+ why keep asking about what spending 500+ will do :question:
Did you try out your exhaust mod with stock ECU mapping ? I would not want to change exhaust only to find out a re flash is needed.
Yes, and I have detailed this, with graphs in other topics, a can will not muck up fuelling, on earlier bikes headers cause an off-idle surge and the ECU-U Flash WILL NOT fix this, a power commander can (at great expense) but I was lucky enough to find a local ECU Tuner who could fix this without having to add a Power Commander.
I checked ecu unleashed web site and not any info there on exactly what they change with there re flash. Does anyone know details of changes.
Most flash providers will tell you they change everything and improve everything etc. in reality you cannot be sure exactly what they have done and how well they have done it - if you want to know this then buy a Flash Tune Harness and do your own flash, but to get a significant improvement you would need a dyno (or find a dyno shop happy to tune your bike with the FT Harness)
I think a 2014 is not going to get big benefits from a generic flash, but it will benefit to some degree.
A custom dyno setup would be better than a generic flash, and probably fitting a Power Commander would be the better option as the fuelling could be perfected for your bike and I am sure it will gain a reasonable amount of power (4-6BHP as a guess, maybe a couple more with an end can) and feel more responsive and smoother.
Sorting out the mega weak closed loop area of the bike will give a much nicer feel, on the dyno it probably shows fairly minimal gains, but it will make the bike feel smoother and more responsive in normal use (i.e. when not caning it) to do this you need some extra add-ons for the Power Commander.
I think you need to think about what you actually want and then work out how to achieve it ::008::