i have a 1998 GSX its stock at the moment... i'm planning on installing a EVO III turbo on there... Can any body tell me if that will help boost my HP? also would i need to do any other modifications in order to install the turbo?

 

Search button buddy : )

Or look under the stickies... its there

 

For the hell of it...

Intake
Exhaust
Blow Off Valve Greddy RS + Recirculation kit
Boost controller + Boost gauge
THEN the EVO III 16g - NOT a f ucking ebay turbo
Front mount intercooler

With all that added power your clutch will fry after a few thousand miles... not to mention you prolly have over 100k on the car... and its about due to be changed anyway. ACT2600 clutch is good.. + a fidanza flywheel or you can resurface the stock one.

Then the next stage is

660cc Denso Injectors
Walbro 190lph fuel pump
Wideband o2 gauge
Apexi SAFC II or DSMLink

 

Yup, there's a whole thing on the E316G in the faq section..
https://mitsubishiforum.com/m_125438/tm.htm

 

the car is automatic..... thats the thing... will the EVO III boost my HP?

 

I guess i wasnt clear. No it wont a lot... those things before the turbo will actually have more of a gain

 

Tranny has nothing to do with a turbo. Sebz summed it up pretty well. Just replace the ACT 2600 with a high stall torque converter and look at adding an LSD to help minimize wheel hop in your auto, also think about stiffer motor mounts and newer shocks and stiffer springs.

It's not JUST about HP, it's about how it's distributed to the ground bro. Auto or manual, if the tranny slips you lose HP. Never forget about the supporting mods.