Garrett Gt3071r 700177-23

[discopotato03]

For those wishing to see the elusive GT3071R do a search on

Garrett Catalogue 4-02.qxd . Click on the second title down to download the 5.19 mb of catalog . The GT3071R is on p26 of the pdf .

Cheers A .

[HypeR33]

Thanks disco, that catalogue is great.

One question, I was looking at now getting the GT35R instead of the GT30R, but the catalogue for the GT35R lists displacement of 3L-4L. Does that mean the GT35R will be too big for my RB25DET?

[discopotato03]

Difficult to say , depends on the power curve you want and what you use the car for .

First off you need to choose an exhaust manifold and style of wastegate as this will dictate mounting flange size and integral/external gate .

If you used a GT30R in large turbine housing form (1.06ARR) its fair to say it'll have a bit more response than its larger brother . You also have a .82 housing to come back to if its boost threshold is a little high .

The GT35R is getting a bit more serious but if its airflow is what you need use it . I would start with the .82 exhaust housing if you do this , there is a .63 housing for it but the penalty for waking it up too early is compressor surge .

I've not had time to research it but I think there are a couple of different trims for the 82mm GT40 compressor , the GT35R uses the largest 56 trim size . The HKS version of the GT3040 uses a 50 trim version of it and the BA XR6's GT3540 I'm not sure . The last one uses a .50 ARR T04E compressor cover with the smallest diametre snout on it which I'm not sure a 56 trim would fit in . If anyone has one of these XR6T turbos could you tell me the diametre of its inlet in mm so I can work out the approximate trim size .

A small trim compressor GT35R would come on a little earlier and still not be short of breath at the top end again depending on what its used for .

Cheers A .

[HypeR33]

Thanks disco...

I dont want something that will hit with a bang too early and light it up all over the place. More of a strong surge that keeps you pushed back in the seats with a huge grin.

Maybe I will have to go down to the GT30R. Dont want to be waiting all day for the thing to come on boost. I have read on some threads that cams can bring boost on earlier. I have HKS 256 on INT and 264 EXH ready to put in at the same time. Would this help to boost the 35R a bit sooner?