Basics on making maps power tuner

i spoke to a person who does a lot of dyno tuning

the rule of thumb is

less - fi (fuel) and more advanced timing + = more horsepower eg quicker response (grippy track)

more+ fi (fuel) and retarded timing -= more torque less response (muddy losse track)

by doing less - fi (fuel) and more advanced timing + some of the possible side effects are engine may run slightly hotter and having to use higher octane fuel

by doing more+ fi (fuel) and retarded timing -= more torque less response the person that gave the info did not say there was any real bad side effects

i suspect yamaha have set "safe limits" that allow you to use preimum unleaded 95 and minmimal effect on tempture you can do no harm if you use a higher octane unleaded say 98 octane if you advance timing to max +4 degrees

there are other factors that do effect settings as well

you will need to expermint to find the right combitnations to how you like it

use above information at your own risk

if you make a new map up check sticky post and add it if you want to share

any more input on using power tuner is welcome it a great tool and is worth every cent

i spoke to a person who does a lot of dyno tuning

the rule of thumb is

less - fi (fuel) and more advanced timing + = more horsepower eg quicker response (grippy track)

more+ fi (fuel) and retarded timing -= more torque less response (muddy losse track)

Keep in mind that to the extent this is true, it will be true only within limits, based on the default fuel delivery and timing curves of the 2010 YZ450. excesses of either fuel or ignition advance in either direction from the baseline would result in a loss of performance and potential damage, but it's unlikely that one can reach such extremes easily by using the Power Tuner.
by doing less - fi (fuel) and more advanced timing + some of the possible side effects are engine may run slightly hotter and having to use higher octane fuel

by doing more+ fi (fuel) and retarded timing -= more torque less response the person that gave the info did not say there was any real bad side effects

i suspect yamaha have set "safe limits" that allow you to use preimum unleaded 95 and minmimal effect on tempture you can do no harm if you use a higher octane unleaded say 98 octane if you advance timing to max +4 degrees

If an engine draws more power from more timing advance, it probably won't run that much hotter. If the advance starts to become excessive, however, temperatures can rise quickly. Detonation can be due to excessive timing advance and/or insufficient octane, and can start up independently of temperature.

Retarded timing, while it won't usually cause high combustion chamber or coolant temps, can lead to hotter than normal exhaust and exhaust valve temperatures.

Remember also that the OP here is from Australia, and the octane numbers he quotes are Research Octane Numbers, which are generally higher than U.S. Anti-Knock Index numbers for a given level of detonation resistance. An AKI of 91 is approximately the same as 95-96 RON.

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