TUNING
WHAT ARE WE TRYING TO ACHIEVE?
..........BEST POWER..........
At Best Power the Operating Parameters, AFR, Ignition, Fuel, etc are as good as they can be. Depending on the bike we may only be able to adjust one or two of them. usually fuel, sometimes ignition and valve timing.
WE TUNE FOR BEST POWER Why? Because that is what we actually want.
TUNING FOR BEST POWER MAKES SENSE (if you think about it)
At Best Power the engine is getting the maximum efficiency (burn) from the available fuel and air.
If Combustion was too lean or too rich then you wouldn’t make Best Power
AN ENGINE MAKES BEST POWER WHEN THE COMBUSTION
PROCESS IS AT ITS OPTIMUM.
WHEN THE COMBUSTION PROCESS IS AT ITS OPTIMUM THE
ENGINE MAKES BEST POWER.
THATS IT, THATS ALL WE NEED TO KNOW
Tuning for Best Power ensures the best outcome
The engine is operating at its most efficient
BMEP is a maximum
Torque is maximum
HP is maximum
At the end of the day the your engine's output is entirely dependant on the Operating Conditions in the Combustion Chamber.
How do we ensure we have the Optimum Operating Conditions?
By Tuning to Best Power!
Why dont we use a WBO2 like other people?
WHY USE A MULTI GAS EGA ?
As part of the Tuning Process we use a 4 Gas Exhaust Gas Analyser to help us make sense of the Combustion Process.
The Combustion Process is what determines how much Power your engine will make so it makes sense to monitor it as best you can.
Residual O2 is mainly unburnt Oxygen in the exhaust. This is what O2 sensors detect.
Residual O2 is mostly a non-participent in the Combustion Process and doesn’t mean much when looked at by itself.
SOME OF THE ADVANTAGES OF “SEEING” MORE THAN RESIDUAL O2
Fuel balance between cylinders, eg No1 lean, No2 rich, unbalanced injectors,
A WBO2 can’t see this unless you have one on each cylinder.
A Multi-Gas EGA indicates unbalanced cylinder mixtures.
Incorrect Ignition Timing Exhaust Gas Composition changes
A WBO2 sees extra oxygen and assumes the mixture is lean.
A Multi-Gas EGA detects the change in exhaust gas composition, O2, CO2, HC proportions change.
Valve Timing, Exhaust Reversion etc Exhaust Gas Composition changes
A WBO2 sees a lean mixture because of the extra O2 and NOx from the recirculated exhaust.
A Multi-Gas EGA detects the Gas imbalance in the Exhaust Gas composition
The 4 Gas EGA detects and shows the results of both Combustion, and Non-Combustion Events
The WBO2 measures a single gas which is part of the Non-Combustion Event
High Residual Oxygen levels are often a symptom of some “Problem” Adjusting the mixture to get the Oxygen level “right”(by adjusting the AFR) is treating the Symptom and not the Cause
EGA Results have to be interpreted and the Tuner has to think about what he is doing and what he is going to do. Some knowledge and understanding of Combustion Theory and the Chemical Process involved is required to help interpret the EGA results
Using an Automatic WBO2 “Tune to an AFR” System is easy to do but to get decent result rquires a lot of extra input from the Dyno operator.
Its all very well knowing all this but you need the right equipment to make use of all this new found knowledge.
FactoryPro EC997a with Integrated 4
Gas EGA
fits the bill perfectly
and I just happen to have one!!
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