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Also, there has been several questions about what makes this system "different". Below is a post I made on another forum explaining things as well as I feel comfortable in doing...
"It is VERY difficult to divulge what is different about this system because the additional technology is SO simple, and makes SO much sense. I know that I will be 5 units in when someone else "procures" 3 years worth of my work and testing.
Here's the best I can do, and still sleep tonight.
ALL Yamaha boost systems "omit" certain hardware and elements of the OEM fueling system. This creates a rift in the OEM control scheme. If the OEM ECU is trying to control fuel delivery based on "lies" from its sensors, etc., the OEM control scheme becomes very erratic, and unstable. It stands to reason... all those bits are what makes it run. Take off a vacuum line or MAF on a car; how's it going to run?
A "piggyback" (which you are correct, this controller is - explained more below) is 100% dependent on either a base map, inputs from sensors, or both. If the OEM ECU is being "lied to", it is causing poor performance in the "stock" range of fueling - and thus bad info out.
If the stock ECU is causing an initial "problem", a "piggyback" then makes its adjustments based on erroneous information, which compounds ill performance not only in the "stock" range of fueling, but also in the "boost" range where it is compounded exponentially.
The name "bridge" comes from the fact that this system allows the sled to run on the OEM control scheme throughout the entire fueling range - ALWAYS - boost or not. This is why it's advertised as being able to get you back to the truck without boost - if you have no boost, you have OEM tuning (except clutching of course)
When boost fueling is needed, the system kicks in and adds ONLY the extra fuel the engine asks for - nothing more, nothing less. Only what it NEEDS. It uses the map we have written based on PSI, and the o2 sensor smooths un-mapped transitions - all while the stock ECU putters away in the background, unaware of anything different than what it knew from the factory."
I hope this helps answer any questions concerning operation that anyone may have...
"It is VERY difficult to divulge what is different about this system because the additional technology is SO simple, and makes SO much sense. I know that I will be 5 units in when someone else "procures" 3 years worth of my work and testing.
Here's the best I can do, and still sleep tonight.
ALL Yamaha boost systems "omit" certain hardware and elements of the OEM fueling system. This creates a rift in the OEM control scheme. If the OEM ECU is trying to control fuel delivery based on "lies" from its sensors, etc., the OEM control scheme becomes very erratic, and unstable. It stands to reason... all those bits are what makes it run. Take off a vacuum line or MAF on a car; how's it going to run?
A "piggyback" (which you are correct, this controller is - explained more below) is 100% dependent on either a base map, inputs from sensors, or both. If the OEM ECU is being "lied to", it is causing poor performance in the "stock" range of fueling - and thus bad info out.
If the stock ECU is causing an initial "problem", a "piggyback" then makes its adjustments based on erroneous information, which compounds ill performance not only in the "stock" range of fueling, but also in the "boost" range where it is compounded exponentially.
The name "bridge" comes from the fact that this system allows the sled to run on the OEM control scheme throughout the entire fueling range - ALWAYS - boost or not. This is why it's advertised as being able to get you back to the truck without boost - if you have no boost, you have OEM tuning (except clutching of course)
When boost fueling is needed, the system kicks in and adds ONLY the extra fuel the engine asks for - nothing more, nothing less. Only what it NEEDS. It uses the map we have written based on PSI, and the o2 sensor smooths un-mapped transitions - all while the stock ECU putters away in the background, unaware of anything different than what it knew from the factory."
I hope this helps answer any questions concerning operation that anyone may have...
