GT3071R + GTX3076R

[snowmuncher]

Trying to get my head round two Garrett models

I have an externally wastegated GT3071R and an internally wastegated GTX3076R

Can I swap the exhaust housings round - eg an externally wastegated GTX3071R and a internally wastegated GT3076R as a result ?

[stevieturbo]

snowmuncher said:

Trying to get my head round two Garrett models

I have an externally wastegated GT3071R and an internally wastegated GTX3076R

Can I swap the exhaust housings round - eg an externally wastegated GTX3071R and a internally wastegated GT3076R as a result ?

You said the same thing twice ?

But if the turbine wheel is the exact same, then yes. You'd need to pull them apart to see.

[snowmuncher]

stevieturbo said:

You said the same thing twice ?

the 'X' has move

[stevieturbo]

snowmuncher said:

the 'X' has move

Doesnt the X generally mean a billet compressor wheel ? The part you wouldnt be changing ?

Some of the billet wheeled units may also have a different turbine, although they may still use the same houisng.
Really the only way to see is to unbolt the turbine housing and measure.

[snowmuncher]

stevieturbo said:

Doesnt the X generally mean a billet compressor wheel ? The part you wouldnt be changing ?

Its my understanding the difference between a GTX3071R and a GTX3076R is only the exhaust housing, which appears to be shared with the older GT30xx series.

The info on the web is thin though.

Its going to be several weeks before I can get my hands on the turbo's themselves.

[stevieturbo]

Pretty sure the 71 and 76 refers to the diameter of the exducer on the compressor wheel.

Nothing to do with the turbine wheel.

Some info

http://www.enginebasics.com/Advanced%20Engine%20Tu...

[snowmuncher]

That makes more sense

[Thom]

In the Garrett GT nomenclature the two first digits refer to turbine size, so a GT30whatever will feature a 60mm turbine wheel with a 84 trim.

As said earlier the 2 other digits refer to the exducer size of the compressor wheel, and the X just refers to the new 11 blade compressor wheel as used in GTX compressors.

The answer to the original question is that you can swap turbine housing but the resulting turbos will still be a GT3071R and a GTX3076R.

Only thing I'm not sure of is if the internal WG thing requires a specific compressor cover or if the diaphragm is just held by some bracketing on the bolts for the compressor housing? Never looked at an internally-wastegated turbo up close...

Edited by Thom on Monday 3rd September 11:15