Where's the power going

I'd just back off the max fuel screw until it starts to smoke, then edge it back in until the smoke stops.
See where that leaves you power wise.

ok wound the fuel screw out got to three full turns but black smoke all donw the street with hard acceleration. Wound it back one turn (2 turns out now) car give good puff of black on initial acceleartion and a little puff when you quick lift off accelerator from 2500 rpm. With engine at 3000 rpm constant there's no smoke at all aaaaaand the vwhicle feels much more lively - haven't had a chance to road test yet will try again next week.