ecu fuel trim

[jondee86]

I fired my engine up on this map...



It was just to have a starting point for a TPS x rpm tune. This is the only
one I have a pic of, as I switched to VE tuning shortly after, and have
used VE ever since. As time went by and I refined the map, and it grew
some troughs and ridges, but the gradient of the top end did not change
much.

If you are using ITB's you will be at near enough to atmospheric pressure
from 40% TPS. So from 60% the amount of fuel will increase in proportion
to the increase in rpm, any improvement in VE, and the richer AFR that
you want at higher loads. Therefore, you could take your 60% line and
(for example) add 15% more fuel to give you a value for the 100% line.
Interpolate for the actual enrichment steps.

Don't know if that makes a lot of sense, so take it with a grain of salt

Cheers... jondee86