LOL at the noobness in this thread.
To cover all the bases, more research needs to be done on OP and others behalf. Turbo > S/C in a high revving application, keeps you at better gas mileage while giving you the power range after 3.5k. S/C = all power all the time and I would suggest it for an LS build on a budget.
FAITH is 100% correct. Most, if not all builds for the hp goals a value build is the BEST way to go. My first turbo build was on a internally stock b16a2 and completed for around 3k including tuning and made 255whp and 178ft/lb and took about a year and change to complete. How you ask? I'll keep it simple and make a loose itemized list of the parts and cost.
you can get a hold of 2gn GS-T(Eclipse) (from a junk yard) manifold, injectors and turbo, clean, rebuild, clock and use on a b-series... $3-400 DONE.
What's left? Fuel and tune.
Fuel - Walboro 295/340 - $ 200 Tops
Tune - P28 + Socket = $160
- Chip + 3-5 hours tuning time at a reputable tuning shop ~= $100/hr + Chip = $700 (give or take)
Extras/ misc. - ext. wastegate / block off plate for DSM turbo wastegate and blow off valve - $300
- Vacuum manifold - $30
- SRT-4 Intercooler - $50
- lines, sandwich plate, catch can, oil pan w/ drain - $250
- Intercooler piping - $90 (bent at a local exhaust shop)
- Skunk 2 IM + TB = $600
- Gauges (temp, boost, A/F) - 300
- various random replacement parts (oil filter, broken clips and extended wires) ~ 30
Total = 3,110
You don't need to dump huge amounts of money into a motor to get moderate gains and if you're spending 10's of thousands of dollars on a daily modified motor you are insane/an idiot... for a full race motor, go nuts. For 250hp and daily driven, value is your friend.