sts turbo
there is no "set" amount... it all depends on your attention to detail.... can you get by with 5k..yeah I suppose but you wouldn't have much saftey...
seriously though if your having to borrow the money maybe you should think about holding off... you add 100hp to the car and it's bye bye rear/trans/clutches/suspension/tires all depending on your setup of course...
this is all assuming you do it yourself...
sts 4k
tuning software + wideband 1k
fuel 1k
rear end 2.5k
clutch/converter/transmission upgrades 1-3k
fuel pressure guages/temp guages .5k
that's 10-12k up front with prices being a bit high because there are always things like loc-tite/teflon tape/wires/ect.. that you should go ahead and do to do it right... and if you don't have a back up car in case yours breaks then you need to have a repair fund....

