[Wal]

I am fitting a turbo to my 6cyl 4.2L diesel engine. With turbos these engines make about 200hp. Typical usable rpm range is 1000 to 3200. with most driving happening around 2000 rpms.

The turbo I have to use is a Genuine Garrett T3 which requires overhauling. It has 0.63a/r built in wastegate turbine housing. 60 trim compressor wheel and stage 1 turbine wheel (smallest).

I've checked the compressor maps and the 60 trim comp wheel looks pretty good for the given power level of the engine. Best estimates say the turbine housing of 0.63 a/r is also very close to what I want to use.

My sticking point is the turbine wheel. I notice turbonetics have a high flow version of the stage 1 T3 which they call the F1-49.

Now I dont know what to do. My options are....
1/ Fit a standard T3 stage 1 turbine wheel (which I think is slightly too small)
2/ Fit a standard T3 stage 2 wheel
3/ Fit a turbonetics F1-49 turbine (which I dont know if it will fit ie shaft size, shaft diameter etc)
4/ How much more wil the F1-49 flow over the traditional T3 stage 1 wheel

Some help from someone please..................

[Robert]

Originally Posted by Wal

I am fitting a turbo to my 6cyl 4.2L diesel engine. With turbos these engines make about 200hp. Typical usable rpm range is 1000 to 3200. with most driving happening around 2000 rpms.

The turbo I have to use is a Genuine Garrett T3 which requires overhauling. It has 0.63a/r built in wastegate turbine housing. 60 trim compressor wheel and stage 1 turbine wheel (smallest).

I've checked the compressor maps and the 60 trim comp wheel looks pretty good for the given power level of the engine. Best estimates say the turbine housing of 0.63 a/r is also very close to what I want to use.

My sticking point is the turbine wheel. I notice turbonetics have a high flow version of the stage 1 T3 which they call the F1-49.

Now I dont know what to do. My options are....
1/ Fit a standard T3 stage 1 turbine wheel (which I think is slightly too small)
2/ Fit a standard T3 stage 2 wheel
3/ Fit a turbonetics F1-49 turbine (which I dont know if it will fit ie shaft size, shaft diameter etc)
4/ How much more wil the F1-49 flow over the traditional T3 stage 1 wheel

Some help from someone please..................

The F1-49 turbine whee is a 10 blade tall tip height turbine wheel with exceptional flow and low drag. The F1-49 should easily outflow the standard T3 Stage 1 you are currently using. I would expect the F1-49 to flow somewhere between your existing T3 Stage 1 and a T3 Stage 2 wheel.

[Wal]

Is the Turbonetics turbine wheel a direct replacement into an existing Garrett turbo ?.
By this I am referring to the bearings, shaft length ,shaft size for the Garrett compressor or will the TYurbonetics wheel require special bearings and will only fit a Turbonetics compressor wheel due ot the shaft size ???

Also my primary reason for going a slightly bigger (or greater flow) turbine wheel is to reduce exhaust backpressure. Given the engine details in the openeing comments what would others recommend as far as turbine selection. I dont want to choke the flow at higher rpms and create excessive exhaust temperatures..

[Robert]

Originally Posted by Wal

Is the Turbonetics turbine wheel a direct replacement into an existing Garrett turbo ?.
By this I am referring to the bearings, shaft length ,shaft size for the Garrett compressor or will the TYurbonetics wheel require special bearings and will only fit a Turbonetics compressor wheel due ot the shaft size ???

Also my primary reason for going a slightly bigger (or greater flow) turbine wheel is to reduce exhaust backpressure. Given the engine details in the openeing comments what would others recommend as far as turbine selection. I dont want to choke the flow at higher rpms and create excessive exhaust temperatures..

I don't believe the f1-49 will fit right onto a Garrett unit but I'll check

[Wal]

Well I received email telling me that the Turbonetics F1-49 is NOT a direct fit into a garrett core.