ok to make it easy for you until you do internal upgrades a stock d16y8 engine can hold up to 13psi or which ever makes you hit 200hp thats all stock internals can hold.

 

a d16 can handle more then 200hp with out internals. I had a friend running almost 240 hp a stock z6 internals

 

ive seen a stock d handle 308. its all about tuning. a stock d can handle more then most would think. just by adding some vitara pistons and tuner toys rods, u can handl 300 and not worry about it. and that is about 500 bux and thats including acl bearings

 

By just turbo'ing the D16Y8, will it give you the HP gains your talking about at the wheel while running on the stock exhaust setup or do you still need to upgrade the whole works?

 

exhaust is very important with turbo cars. the bigger the better

 

The whole project would then equate to over 1k in total, possibly 2k. Alot of time and maintenence involved in putting everything together if I may add.

Not worth it to me on these econoboxes but, hey whatever floats your boat.

 

i have a greddy evo2 cat back on now.. im not sure what the piping diameter is 2.25 or 2.5

 

2.5 i believe.
Exhaust is really importent because on my set up ive got the stock cat and 2in exaust on it and its definently hurting spool time. I plan on talking to kteller and picking up a 3in exhaust

 

im also running a test pipe.. is 3inch piping required or will 2.5 work out alright?

 

nah 3in is ideal, not required, you will be fine wiht 2.5