I am in the process of switching from a t-trim to a turbo. The engine is a 357ci with 205cc heads, ported gt40 lower and boxed upper, custom cam, 2500 stall, and will be switching to 3.55s. It's a street truck and I am only looking for 500-600hp

Would this turbo work for me?
http://pages.ebay.com/motors/link/?nav=item.view&id=140919339416&alt=web

 

i would run a minimum of 68mm compressor wirh a bigger turbine side, a hx45(a little small) or gt45 would be aproxamately what you want

 

Gt45 turbo would work well

 

So for now on a budget one of the 68mm gt45 from vsracing.net would work good

 

i would look into the 76mm gt45 ,, the 69mm gt45 would prob get you to your hp goal though

 

I am stuck trying to convince myself to spend a little more for a s400.

 

So I am pretty sure I am getting an S400SX-72 w/t4 from forced inductions. What would be the ideal size a/r for a quick spooling? .90 or 1.00

 

just bout perfect, skip the t4 flange option it is $200 extra just get the small t6

 

The only problem is my kit already has a t4 Flange, can I use a t4 to t6 adapter without issue

 

You can use the adaptor flange without issue.

 

Sweet going to order it today

 

Running the s400 with the t6 flange, would it hurt anything to use a reducer for a 4"down pipe

 

Funny, I have been looking at the same turbo,the S300,on ebay for my Lightning.

 

The s475 is also pretty darn cheap with room to grow.

 

x2 s475

 

I just nervous because it's such a larger turbo (the overall size of it) I wish it didn't have the v band on the outlet.

 

You could go t4 on it as well (extra). They are big, but would probably work great in that size motor.

 

How quickly would it spool, I am only shifting at 5800rpms

 

I have a turbo 5.3 with a t6 s480 that in second is at full boost by 4000 rpms and is in positive pressure by 3200. Mine is the 92mm turbine though.

 

I wonder how much of a difference there would be with the 83mm turbine