Im thinking about putting twins on my truck it is a p-pumped 24 valve

DDP 200's
10 Plate slide forward
Full Cut dv's
4k gsk
Rings
Studs

HTT 64/65/13

Im going to send my charger off and get it machined to a 64/71/13 and im thinking about something like a s480 to put under it what do you all think about that?? im open to suggestions but my top charger will be the one that i just described..

 

I'd go with something with a bigger hotside. That larger 71mm turbine should help a bunch with drive pressure.

That's actually sorta big for a secondary, imo.

I'd personally go with an S488 class turbo. Much larger map all around, and more efficient, low drive pressure and LOTS of fresh air.

It sounds to me like you are planning on ample amounts of fuel, so I'd plan accordingly and go big on the primary.

If you want more power later, you can go to a Silver Bullet or something and still not outgrow that S488.

JMO (see disclaimer)

 

What is your goals and use of the truck? An S475 will support in excess of 750hp. An 88 would be much much more, and lose some of its streetability. You're not gonna spool it like the CR guys will. The 64 is a bit big for the 475, but nothing outrageous.

 

im not sure what the plans are for it yet prolly drag raceing at the truck and some street driveing it will not BE A DAILY DRIVER when i finsh it.

 

Garrett GT4208R.