Here's a fuel map I have worked on for an engine I have. RPM and throttle plate angle and injector duration in milliseconds for each throttle V rpm load point. The ecu interpolates between the load points. Notice how each load point has a different value based on the engines requirements. What makes people think adding one of these devices no matter how they work off the Lambda or the air temp sensor that adds a fuel percentage globally is what the engine needs? You could just up the fuel pressure reg setting and achieve the same result. Do people think when your engine is dyno tuned to maximise it's performance and fuel economy that the tuner just adds or subtracts a percentage of fuel and ignition from the map globally? Do the believers think that 3 or 6% more fuel or whatever at 4000rpm and 50 degrees throttle angle is going to be the same benefit or non benefit as the same percentage at 2500 rpm and 20% throttle angle?
Thats what these things do, add fuel everywhere whether it's needed or not. Not very smart. On top of that the the Lambda style as pointed out will only have any affect good or bad in closed loop operation. Does the engine need more fuel at idle? does it need more fuel cruising at 80kph at a steady throttle opening? Who knows and they don't care. Just give us some money and you can have extra fuel, everywhere whether it's needed or not.
If it was a carburetted engine would you just go, I've heard these things run lean, so bugger it I'm buying a kit and fitting bigger, idle, main jets, needle and slide and calling it good? Nobody with half a brain and some idea of tuning would do that, but for EFI, well that's what the you are in effect doing. It's just dumb stuff. However if you "believe" and have spare money to throw around it's yours to waste.
Phil
I knew that I would regret even acknowledging this thread and that it would lead to the same old crap.
_ I am not writing this to educate Phil. And Phil is not alone in his chosen beliefs. I am replying to this post to let other riders know that not all plug and play devises are the same.
More importantly, people should know that the
existing ECU map is not eliminated or disconnected! It is still there chipping away at throttle angles and AFR and RPM. In fact, our RE 650 fueling is really, really good right out of the box. However, like all brands, it is designed to run as lean as possible without killing the engine and without regard to better performance. Our motorcycles run fine without any tweaking.
_ However, over the years I have seen the hardening of the "Dyno Lord" opinion. They dismiss the laboratory work of guys like Jens and Dale Walker because it makes things simple for the real world riders and is more often than not a better solution for a street bike. Don't get me wrong, dynamometers are essential if one is making big-swing engine modifications to get the new engine in the right ballpark. And thereafter if you want the best drag bike performance on a particular day, at a particular elevation, with a particular fuel batch ... they are indispensable.
_ But that is not where most of us live and ride. We are not going into the pits with our laptops at a race track. We are not strutting across a stage at a bike show to dazzle a slack-jawed audience with slide presentations full of colorful spreadsheets. We just want our personal scoots to run a tic better on any road, at any temperature, every time.
_ To be clear, I do not sell BoosterPlugs. I have been out of the motorcycle biz for many years and have finally achieved the status of recreational motorcycle guy.
I do still bunch up at the cancel culture of the dyno crowd who lump all tuning devices together with the sugar pills. I still rant about the lies, big lies and dyno lies.
_ And to his credit, Jens, whom I have never met face to face but have worked with regarding Suzukis, has taken the bold step of calling out the sugar pills and published the differences here:
https://www.boosterplug.com/shop/cms-the_alternatives.html _I'm writing this at sunrise on a day of Headline News rain storms and localized flooding. So I'm suiting up and going for a ride on a adventure bike.
Peace
Topic: O2 eliminators. (Read 4614 times)