I've got a pacer that has very few mods and it's treated me just fine. I'm flying a 135hp pacer with the stock wing (not lengthened/no tips), vg's, somewhat flattened out prop, and 8.50's or GY 26's. It's hard to remember specifics of DA, takeoff roll, etc., so I may not give you as specfic examples ad you're looking for.
At 1000 DA and less, with myself and just over half fuel, I can get get off/land within 300' consistently.
with two people and full fuel, it's right around 500'.
at about 3000 da and 3/4 gross load, it'll eat up around 1000'.
at about 5000 da at full gross, it's roughly 1500' feet.
useful is 950 for me, so two people (350), full fuel (234), and gear (350-ish lbs left).
Bigger wings, bigger engine, fuselage lengthening, etc would make it nice (bushmaster is the word your looking for WWhunter), but that can all happen later down the road.

