Nice setup. What are the benefits of a supercharged engine over a Turbo charged engine. Does the supercharged motors require less maintenance?
Supercharged Gen II
- Thread starter born2burn
- Start date
coreywiley
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That's nice!
Shooter792
Registered
Sure no problem.The Auto Tune module connects to an expansion port on the Power Commander 5. It uses a wide band oxygen sensor (that you install in the exhaust system) to read the exhaust and determine the air fuel ratio that the engine is currently burning at by taking readings and inputing it into the PCv (Power Commander 5).
The PCV looks at the data stream from the auto tune and makes fuel changes on the fly based on what you have predetermined to be the optimal AFR (air fuel ratio) for that particular throttle and RPM within your fuel map.
It is kind of like driving around on a real world dyno that keeps adjusting your fueling to a predetermined Target AFR. When it makes changes it creates a table of trims that look allot like your fuel map. The next time you look at your data on your PCV (after a ride)you will have the option of applying those trims to your fuel table and zeroing the trims. Eventually the trims become smaller and smaller as your map becomes more accurate.
You start with the trims turned up so that the PCV can make large changes (up to 40% +- to fueling). as your map needs less and less change you turn down the trims to say 5% +-. That way if something happens like you get an exhaust leak and introduce a bunch of fresh air into the exhaust, it wont set the fuel to full rich to try and compensate and leave you with fouled plugs.
But....Rich never hurts your engine. Lean mixtures burn stuff up and cause detonation.
I hope that explains things better.
Those thinking you can burn anything up because of an auto tune module without intentionally doing really crazy things within the settings (and most likely outside the limits within the software) just don't understand how it works. The whole idea is to keep it safe and running at an optimal state of tune.
Jeff
CyberAngel
Registered
The same: more oil changes every 4000 km/2500 miles.
Stronger drive chain needed, etc...
(I suggest Pro-Oiler as a companion)
Positive: no turbo-lag, typically starts lower rpm, more linear boost (depends)
Negative: add $1000 to price
Stronger drive chain needed, etc...
(I suggest Pro-Oiler as a companion)
Positive: no turbo-lag, typically starts lower rpm, more linear boost (depends)
Negative: add $1000 to price
No offense but I understand how they work. I've used the auto tune systems, I was just curious how you are tuning it? Are you doing these runs on the dyno or street? Starting fat and leaning her out or what?
Shooter792
Registered
Sorry I guess I misunderstood what you asked. It is also hard to know what everybody's level of understanding is. No insult intended.
Well for safety reasons (especially at full throttle) we thought it prudent to tune on the Dyno. We did use the auto tune but it initially needed so much additional fuel that it was out of range of the auto tune. We weren't getting any trims. Just stupid lean. 1st pull only net about 250 BHP. The more fuel we added the more we got out of it. when we hit the range of the auto tune it started making trims. But at the same time we were graphing AFR to RPM so we could see exactly at any given RPM range if it needed +- fuel. We tuned at 100%, 80%, 60%, 40%, 20%, 15%, 10%, 5% and 2% along with setting target AFR at idle to be just a touch rich (to help keep it cool @ idle).
It is still running a bit lean at full throttle above 9500 RPM (14.5 - 1) but fuel is maxed out, thus the reason for needing additional fuel pressure.
Once I get the fueling right it will require another trip to the dyno.
What is amazing though is just how well mannered it is on the street. Possibly the nicest street bike I have ever ridden. You do however need to re calibrate you throttle hand to a much lower expectation of what is required to do anything. Keep in mind, it makes 250 BHP @ 80%, and still over 200 BHP at 60% throttle. Anything over 50% and its Jeckle and Hyde. You will meet it it's evil twin and you better not be snoozing. It may be the last nap you ever take. It is frighteningly quick when you ask it to be.
It is a bike that needs to be ridden with restraint and respect.
Jeff
turbobusa2000
Registered
A bit lean
14.5 at full throttle and that rpm... thats asking for trouble. Care to post a a/f graph so we all can see.
Shooter792
Registered
A bit lean
Yes I know... The reason why I am making changes...... But, if you can hold full throttle at 9500 RPM + for more that a second or two in any gear on the street, then chances are your going to have more serious problems potentially with your health and law enforcement than the mechanical issues.
This is still a work in progress.
Shooter792
Registered
Correction !!!!!! "makes 250 BHP @ 80%, and still over 200 BHP at 60% throttle."
Make that: makes 290 BHP @ 80%, over 250 BHP at 60% and still over 200BHP at 40% throttle.
Make that: makes 290 BHP @ 80%, over 250 BHP at 60% and still over 200BHP at 40% throttle.
Shooter792
Registered
Sounds like a fun bike, just careful with that auto tune stuff...
What are you talking about? ???
The auto tune helps make things safer and keep things IN TUNE.....
Please read previous comments about HOW IT WORKS.
Shooter792
Registered
You got it backwards. In the industry we have a saying..."rich is safe". Rich engines may load up and run poorly but the added fuel lowers combustion temperatures. That is why when you tune an air cooled V twin with fuel injection you setup the rear cylinder richer. It helps it to run cooler.
Yes a rich engine burns more fuel, but it burns it much less efficiently and it resembles more of a slower more controlled burn rather than an explosion.
There are a few ways to stop an engine from detonating, Timing, fuel (making it richer), dropping compression, octane and decreasing intake temperature to name a few.
When you compress air you increase it's temp. That is why inter-coolers are so prevalent with turbos and superchargers. Water or alcohol injection do the same thing along with changing the octane of the mix to some degree.
i can't wait to see this bike complete - awesome guys 
ResidentEvil
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Thanks for learning me something new old timer 
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