Turbo sizing?

[Max2k1Camaro]

So let me get this straight...A 3.8L will need a t3/t4 hybrid turbo setup to run its best? Is a regular garret t3 too small? Is a T04 too big?

Just trying to put the pieces together here...

[Arctc Wolf]

I suggest u call Garrett and ask them urself. they have computer programs that can figure that stuff out for u very quickly. sizing also depends on how much boost u wanna make, how fast, and what ur displacement and redline is.

[Tiago]

a t04 is not too big, I run one on my car.
the choice of a hybrid was done purely because we wanted a faster spool. :D

[nocutt]

<blockquote>quote:</font><hr>Originally posted by Max2k1Camaro:
So let me get this straight...A 3.8L will need a t3/t4 hybrid turbo setup to run its best? Is a regular garret t3 too small? Is a T04 too big?

Just trying to put the pieces together here...<hr></blockquote>

It is very complicated...you see t3/t4 is only a generalization within a family of turbos...so is a t4! The issue is maingly understanding the compressors characteristics matched with the proper turbine. While doing all this, then you will have to know the limit of boost you honestly want to run, when you want the power to come in...stock redline, stock shift points, stock torque converter vs a modified program plays a big role. In General, a t4 will be too big for the street, especially on an auto, while a t3/t4 hybrid will be a better match for the street a modified hybrid assuming stock calibrations (L36) will be fire on the track. A hybrid t3/t4 (63/60 AR) actually will start loosing its efficiency at about 16-17 psi intercooled on a stock 3800...with this combo and a properly setup 3800 boost starts about 2200-2300RPM and full boost is before or about 3k, even using a small t4 one will loose spool-up time and I guess depending on the turbine wheel a higher stall converter will be ideal...but top end is ridiculously powerful. In the end, IMHO a t3/t4 hybrid will provide satisfactory gains, both on the street and strip also their are more families within the t3/t4 genera it is overwhelming...

[Arctc Wolf]

don't forget all the little trinkets that can come w/ turbos. ceramic ball bearings, ceramic wheels(good to about 17 psi on skylines supposedly), housing characteristics, dynamics, and composition, ect. all this stuff will help spool turbo's faster and affect when and how much power they'll make.