Pre 98 Contours have a return fuel system,
Foci, Cougars, and Post 98 Contours have a returnless.
Return style allows the flexibility of uping the fuel pressure and adjusting the fuel pressure pulse to supply more fuel.
Returnless have much less room in both departments.
I would still go with a dry kit.
Returnless will be fine with a 50HP shot,
(I haven't done the math to figure out amx HP shot),
anything larger and I would upgrade to a bit larger injectors.
Asking questions here is a good thing, but nobody here is the god of nitrous.
I would reccomend reading "Sport Compact Nitrous Injection".
(There are better books, but this is a good general overview.)
This will give you alot of no-nonsense answer to questions, show you some of the science and math behind nitrous, and generally allow YOU to make an informed decision for YOUR car.
Conflicting expereinces is one reason why nitrous has a bad reputation.
