Ok So I have the Typical D16Z6 Turbo Set-up. I know They can hit the 300HP Mark but I wanna see if i can get closer to 400Hp. I need help choosing the correct sized turbo for my set-up to hit my goals without going to big and having sever lag. Trying to find a balance between useable HP with hitting as close as possible to 400HP

My Current Set-up: All parts are new and motor and head are assembled(0 miles), but not bolted together yet, or Installed in the car.

D16z6 head
Mild Port and Polish Shaved .020
AEM Black series Adjustable Cam Gear
AEM Black FPR
AEM Black Fuel Rail
AEM Fuel Filter
Supertech Springs
Supertech Valves
Comp 59300 cam
High Comp head gasket (0.0014)
ARP Head Studs
Skunk2 Intake Manifold (Port matched)
Skunk2 68mm TB (Port Matched)
RC 750 CC (was shooting for 300hp, going to get ID 1000's)
Walbro 255 Fuel Pump
Tubular Mini ram equal length manifold
Tial 38mm Waste gate
3 inch Down pipe with straight 3 inch exhaust
Std bore Z6 block with Stock sleeves
Std Eagle Rods
Vitara Pistons
ARP Hardware throughout
Godspeed FMIC with 2.5 Piping
Greddy type -s BOV
4 bar Map sensor
Hondata s300
AEM Wide band
AEM Oil Pressure
AEM Boost gauge
Competition Stage 4 clutch
Competition Ultra light Flywheel
JDM D15b Tranny with stock LSD

Probably missing some things. As of right now I have an Ebay 57 trim/ .63 AR turbo. I was looking at the Billet series Precision turbos or the Precision 5454E, 3231E, 5557, or the 5757 turbos to reach my goals. I just looking for a balance of lag/performance for this little motor. Didnt want a 6262 + and have WAY to much lag. Although someone told me you can get it with the smaller .48 a/r, so it might help spool time.

Thanxs

 

Here is a great article about turbo sizing. I would highly encourage you to read the entire article. It is very interesting and you will learn a lot about turbo sizing.

Ford Mustang Turbo Size Guide | Muscle Mustang & Fast Fords Magazine Article at Automotive.com

 

Those eagle rods are what is going to give you lag, those rods bring the height of the pistons down which lowers the compression like crazy, thus causing lag in general. For future reference the I-BEAM rods will not lower the compression as much so there for you will not lag as much.

 

i dont know if he will get the whole drift when this is comparing a mustang gt motor 4.6L-5.0L turbo sizing to a 1.6 single cam

 

Well, the way it is explained is applicable to every car. That is why I post this link. It has a lot of useful information.

 

The Vitara pistons are used quite a bit, but are sized a smidge small. Get ready for lots of piston slap. Otherwise it seems like you are using some quality parts. Have you thought of trying a 60-1? Kinda of a old turbo compared to today's technology but would probably get you close to your goal of usable power over more of the rpm range.

 

This is why alot of people go with oversized vitara pistons, they can bore the block to the exact size thus meaning no pistons slap because they wont be in a stock bore block with a slightly smaller piston than what the walls actually are.

 

Well if the bottom end doesnt hold together, its fairly easy and cheap to pick up a d16 block, Ill just end up getting some REAL forged pistons instead. I am going to have to look into the 60-1.