SEARCHSEARCHSEARCH!!!
deleting the fan is to smple to hardly even need a thread, LOL
but...just remove the shroud, then remove the 4 allen bolts..no fan....but the clutch it's self will still be there, doesnt really help at all i dont hink hp wise,
mess under the intake, thats more of maintenence, issues...kindal ike a cooling/vaccum tune up. heres the link
http://m42club.com/forums/showthread.php?t=3621&highlight=mess+under+the+intakeor
http://m42club.com/forums/showthread.php?t=2742&highlight=mess+under+the+intakealso, try weight reduction... i know stripping the interior might not be your thing, but you can remove the spare tire, thats free.
give your car a tune up, it probably needs it.
good set of spark plugs, nkg are supposed to be the best, but i run bosch +4's, eplace the air box with a AEM dry-flo filter, cai kits can be made for under 70$..thats pretty cheap.
as for the COP kits, a set of volvo 850 wires work great, and are easily found in junkyards, the lower the milage the better.
get a chip, dinan sells them for around 200$..cheaper than mark d, or jim conforti, but work EXACTLY THE SAME
get a set of nice tires, falken azenas or ziex's, you'll love them
thats about all the "cheap" stuff i can think of off the top of my head.