depends on the ecu and how well it was tuned. You do not need closed loop for an
altitude change.If it is speed density then it will be close but will be off
slightly depending on compression ratio and the effects that has on pumping
efficiency. If alpha-n with a baro sensor connected it should be spot on.. As
long as the baro correction tables were done correctly in the first place. EGT's
are almost meaningless for setting the air fuel ratio BTW. If you know the air
fuel ratio then they will help with the timing though..If you have some sort of
dyno data to correlate the egt to.
Dave
Chris Harris wrote:
>
> I think my last transmission might have gone astray so
>
> Thanks Mayf, Tom & Doug for the info. I figured that 15% leaner would be a
> good starting point compared to a sea level dyno figure.
> My EFI is open loop. Runs on MAP using the TPS and rpm to read fuel tables.
> Will monitor and adjust with logger reading EGT's, throttle position, rpm etc.
> Weather station readings will also be considered.
>
> Thanks again,
> Chris H.......................NZed.
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