Why can't I modify the "speedometer" cell on my ECU maps?

kento_ftecu

That function is disabled because there is no need to modify it. Most speedometer setups now use rear wheel speed sensors that are self-correcting, so changes in gearing won't affect the reading, and unless you've dramatically changed the rear tire size, that will read the same as well.

Our maps disable any gear-related factory power reductions.