Originally posted by Slipstream
Mainly what I'm getting at, is can I build a 400hp S5 13bT for $4000 including the ECU?
Not even close. Want a break-down?
Let's say you start with a JSpec used engine at $800.
Rebuild and porting will be pretty important for 400 hp, so there's $2000.
Now you need an EMS. $1000, if you tune it yourself, more with a professional tuner.
Now you need a new turbocharger... $3000 for your premade kits.
Now you need fuel to support it... say, 2 720CC, 2 1200cc injectors and a fuel pump... $500.
Now you need to intercool it... for something decent... $600-$700.
Exhaust from the turbo... $200 custom jobby.
Then you'll need a rad to support that power... $300
Clutch to support the 350+ ft-lbs of torque.. $300
This is just a start, doing the installs yourself, and costs listed are a MINIMUM.
Dowelling won't be necessary until around 550 hp at the flywheel.
Lower compression rotors are not a neccessity for higher boost if your tuner knows what he is doing. (Higher compression gives better power at the same boost levels, gives better off boost response, and spools slightly faster).
The rotors are NOT interchangable between series... the S4's and S5's are different weights and compression ratios, and use a different counterweight balance.