garrett GT3071r (WG) good upgrade for greddy turbo kit??
 

How many hp can be made with this turbo at 9psi??

Its all relative to your setup. In theory 1.6 times what you have stock. Any number of things will reduce that.

The stock Greddy flows about 40lbs/min (at the edge of its efficiency curve) at 15psi and the 3071 flows 45 . So it is a reasonable upgrade . Another 35 whp realistically.
However the renesis itself flows more like 53lbs/min at that pressure so the 3071 will be overextended to keep up if you want t make more than 300whp. The thing to do is to see if Garett will modify the 3071 for you and fit a 76mm compressor wheel .

If you only wanted an extra 35whp , a much cheaper/easier option would be to fit a 20g wheel into the Greddy turbo.

I got one on auction for 250.00
 

I buy one mazdamaniac upgrade on action 250.00

the goal is 300 hp
 

With stock internal engine

Do you have it yet ? Check the diameter of the intake to the turbo .... is it around 58mm ?

is on the way.

Well if it is upgraded tto a 3076 then you have just scored yourself the perfect turbo for the job. Would appreciate it if you would measure it when you get it and post the intake size .

I did hear that you can't rebuild those turbos easily so I hope it is in good condition.

Rebuild easy.
 

The person say only have 5,000milles. no shaft play. but i have friend rebuild for me for 250.00. but i will try to upgrade to the turbo with new aluminum Compressor Wheel.

I saw that one on Ebay, it already has the flange welded too. Great deal.

Yes
 

I buy. Attachment 220480

Attachment 220481

it doesn't look half bad

Hell, that's a great deal for 250$!

I have the same turbo from MM, one thing I would really recommend is to leak test the turbo itself, mine was leaking due to a missing backplate to compressor housing oring.

While its apart, please measure it and post results.. I was going to but sadly forgot >_>

do turbos normally have a oring there. I've seen a few photos with them, but most ive seen do not have them. Including the brand new one I just got during a rebuild from comp turbo.

Noob question; Does a 3076 fit on to a Greddy/Low mount without too much hassle?

Would be great with a short- list from you experienced guys with turbos that is (or you firmly believe)good for this application. And with some remarks. I try to keep educated, but its a jungle. For example:

T618Z(Stock Greddy)
Expect: 260-280WHP. Pressure 5-10psi(?)
Pros: Minimal lag, good low end and midrange. Reach full boost at 3-3500RPM
Cons: Limited top end, torque start decreasing at 7000RPM
Remarks: Aux ports must be blocked

T04E-57 trim
Expect: 300 - 320WHP. Pressure 7-14psi(?).
Pros: Maybe the best compromise for a daily driven setup. Similar response, low and midrange to T618Z, but with some more top end(?)
Cons: Still limited top end, torque start decreasing at 7500RPM(?)
Remarks: Aux ports does not have to be blocked. Direct replacement(?)

No it wont fit easily at all ...... main issue is the size of the intake which on the 3076 has an anti surge anulus so intake diameter is about 100mm .

This wheel should slip right in.

Sounds plausible

Why are you blocking the aux ports?

cuz a gedddy is too small for a 6 port engine

But but but but

But me no buts ........... I've tuned lots of them and blocking off the aux port yeilds great results .

Yeah, I would believe so.. Mine was leaking like the devil without it. Just boost leak test the turbo itself and see if you need it.

Is T04E-57 trim among the smallest turbo that can really support the Aux port?

Pretty much ... although you could argue that it's too small as well .