MR-1 Sensors - How does it run?

[Speedling]

hey guys, in my quest for more POWER and SPEED, i need to know how the heck this thing runs!
Before I start dismantling this thing and making stuff for it, I would love to know from the huge knowledge database (you) what sensors I have on this thing.
1. It's based on a Yamaha R1 Engine
2. Fuel injected
3. ECU controls coil packs for spark.
4. There are Throttle Position Sensors (TPS)
5. Thermo sensors and Cam Position Sensor (found after posting)
6. Intake pressure? Is there an O2 sensor somewhere? Simply a map in computer that goes from the throttle sensor?

Thanks guys!

 

[Speedling]

http://www.topspeed.com/boats/yamaha/20 ... 39886.html
Found this:
The FX™ High Output is powered by a high output Yamaha MR-1™ engine. This 1052cc four cylinder, four-stroke Yamaha marine engine delivers more power in a lighter package than any other full-size, four-stroke normally-aspirated watercraft in the industry.
Electronic Fuel Injection (EFI): Four individually adjustable throttle bodies, throttle position sensor (TPS) and intake air pressure and air temperature sensors supply the optimum air/fuel mixture. The results are a smooth, high power output with low fuel consumption and low exhaust emissions.
Specially Designed, One-piece Cylinder and Crankcase Assembly: Provides tremendous engine rigidity that’s lighter and stiffer than two-piece designs.
Slant Detection Switch: Electronic switch stops engine and oil pumps immediately if watercraft becomes overturned, protecting motor from unwanted water ingestion.
Dry Sump Lubrication: Uses two engine oil pumps to deliver lubricating oil to each moving part with water-jacketed sump and oil backflow protection.
Yamaha Engine Management System (Y.E.M.S.): An integrated, computerized management system that controls and adjusts such functions as ignition timing, fuel injection mapping, engine diagnostics and OTS. The OTS function of Y.E.M.S. activates when the operator releases the throttle lever and attempts to steer the watercraft. This assists the operator in turning while the watercraft is decelerating.
Independent Water-jacketed Exhaust Manifolds with Collector: Achieves high power while keeping noise and exhaust heat under control.
Thermostatic and Pressure Controlled Cooling System: Water flow through the engine is controlled by a thermostat and pressure system and is maintained by a pressure control valve.
Corrosion Protection System: Sacrificial zinc anodes protect the engine from harmful galvanic corrosion. Stainless steel fasteners (nuts, bolts, hardware) provide a long service life.
Electronically Controlled, Variable Ignition Timing: For exact ignition advance control at all throttle positions and RPMs.



So.... it comes down to this - can I add boost without modifying the electronics?

 

[Julian]

The YDS diagnostic screen shows all the different sensor readings it links to. Do you have YDS?

 

[Julian]

From the file linked in the FAQ on YDS..... here is what is in the list....I have to assume it is the complete list....

Pulser coil Normal 13
Engine temp sensor Normal 15
Throttle position sensor Normal 18
Battery voltage Normal 19
Intake temp sensor Normal 23
Cam position sensor Normal 24
Intake press sensor Normal 29
Slant detection switch Normal 47
Bypass valve motor Normal 54
Steering switch Normal 55
Throttle body Normal 63
No-Wake mode switch Normal 68

 

[Speedling]

So, since it reads intake pressure and temperature I would think a little boost would be fine. The bikes ran ram air anyways right?