My rule of thumb has always been to shift when the engine is no longer making more power, so, if your engine stops making power at 5800 rpm, that's your shift point. Leaving the shifter in "d" has never been my thing, wring it out and let it eat!
I was refering to leaving a fully auto. in drive for a burn out, governor isnt right for auto. to work in the 1/4 mile ..
I do have a 5800 rpm governor laying on the bench , but have never put it in , ans probly never will...