Gt3076r to gtx
 

Anyone know what I would need to get the benifits of the gtx without buying a new turbo?
I have a gt3076r.
Would I just need the newer wheel?
Also, help me understand the dynamics of size and A/R? If I have the 3076 with .82a/r does that mean I have the 60mm wheel? If I have the .63 a/r housing does it still have the same size wheel? Thanks.

I too would be interested in doing this. Did you find out any good info? I think best bet is to call Jake at Tial probably.

You can use your existing 0.82A/R turbine housing with the GTX3076R.

Using a smaller A/R will increase the exhaust gas velocity into the turbine wheel. This provides increased turbine power at lower engine speeds, resulting in a quicker boost rise. However, a small A/R also causes the flow to enter the wheel more tangentially, which reduces the ultimate flow capacity of the turbine wheel. This will tend to increase exhaust backpressure and hence reduce the engine's ability to "breathe" effectively at high RPM, adversely affecting peak engine power.

Conversely, using a larger A/R will lower exhaust gas velocity, and delay boost rise. The flow in a larger A/R housing enters the wheel in a more radial fashion, increasing the wheel's effective flow capacity, resulting in lower backpressure and better power at higher engine speeds.

A 0.63 housing would probably be more fun to drive on the street and more responsive, but it will choke on top end power.

What's your intended use for the car? Pure street or track use? If your spending most of your time in the upper rpm band, then don't go with 0.63... Stick with 0.82. That's a good compromise between response and top end power. However, if you're mainly into stop light racing, a 0.63 would give better response and torque earlier in the rpm band.

I have never seen a single turbo 911/930 motor with anything less than 0.82 A/R turbine housing... 0.63 is typically reserved for twin turbo setups.

All comes down to your diving style and intended use for the car ;)

I would like more responsive power, my transmission would not want that.
I drive it on the street, and my close ratios are fine with the way it is right now. But I am wondering anyway the dynamics of the housings, and wheel sizes and options with swapping. For instance, I want to get a v-band hot side discharge and if I'm changing that, maybe it would be a good time to change to the .63A/R. But if the .63 A/R hot side didn't work with the configuration(my exhaust wheel ) I have then it's not worth the hassle to me. But if it's a matter of changing the wheel, then maybe if I could also get the GTX version? Some thoughts?

Try calling ATP turbo, they might help.:)