How do you guys tune the timing maps?

I guess that the best solution would be to have a dyno and be able to set the ECU to a constant RPM and gradually raise the resistance of the dyno brake and adjust the timing accordingly.

But in our case we already have some well working "base" maps from the factory calibration and most of us only have the option to log on the road.

Assuming that boost, fueling etc. is all good. Would a good way be to cap the load using e.g. LDRXN to each point of the load axis in the timing maps, log and adjust accordingly? In this case wouldn't it make most sense to start adjusting from the lower RPM, log and continue upwards?

Or do you do it differently?

A lot of times what it likes in static condition will change once you do a sweep. We have a load based dyno, and keep at a set RPM, and make adjustments based on load. You can only do this realistically up until 4500 rpm or so on a turbo car, and do the top end in sweeps. We always do road logs after it's been on the dyno anyway. I would say if you have a good tuned base, logging on the street is the best, although it's not particularly safe, unless you're prj that has access to an airport strip. 

Not only this, however do you use Lemmiwinks or WinOLS/Tunerpro? I understand tuning for E85 is more then just the adjustment of KRKTE. :/

Thanks a lot for your comments!

I will only be tuning for pump gas and higher load than stock. So what nyet proposed with changing the last few load lines is what I am aiming for. Was just wondering how other people did or if I missed something.

But to adjust the last few lines do you cap the load and log or just do some runs and adjust with the same base map?

How would you tune ignition for best efficiency in low load and low rpm sections when fuel type is changed to LPG or E85?