So my 90s t2s turbo got chewed up by an apex seal and needs the turbine replaced. The car will be running at 10psi and im curious wether the bnr stage 2 will be efficient at all at those boost levels? I intend on increasing boost later on but i wont have enough money to get the sufficient upgrades for a littke while. Just curious if anyones done this or if its recommended i just keep the stock turbo until im ready? Thanks

 

Its a solid turbo. I have the stage 2 and really like it. You will have to do a little grinding on the lower intake to make it fit well. The new compressor housing is a little too big to fit straight on, but the additional grinding can be done with a dremel or rotozip, its not a huge chore.

The stock connections all hook up to the stage 2, except for the compressor inlet. If you are using the stock intake elbows from the maf to the turbo, you'll want to find a 3" intake elbow to replace the bottom one.

Pretty minimal work for this upgrade, good quality build, would recommend

 

Will bnr replace the turbine wheel as well? Or do i gotta locate one that isnt damed first

 

And whats an alright place to get the pipes and elbows for a turbo inlet duct? Ive read ebays good for something simple like that. And i dont mind having to modify anything to fit, just the fact that i can use the stock exhaust is relieving enough 👌

 

This is a little side information for you, but I just ordered an alternative exhaust wheel for a hybrid turbo that I am putting together and several others have used as well. I believe BNR uses this wheel for some of their hybrids. I remember reading they do somewhere in this forum, but I can't remember where.

Anyways, the wheel part # is Garrett TA34 P/N 451311-0002.
Here is one on ebay: Garrett TA34 P/N 451311-0002 451314-0002 Turbocharger Turbine Shaft Wheel NEW | eBay

I also double checked the measurements with the stock wheel and they are nearly identical.

Wheel Inducer (Major dia.) / Exducer (Minor dia.)
TA34 65.2mm / 54.4mm
Stock 63.75mm / 54.61mm

It is said there are no issues with clearance on the inducer (major dia.) of the exhaust wheel inside the housing. According to bumpstart in this thread: https://www.rx7club.com/single-turbo...bo-qs-1024251/

"going the bigger compressors ( than the 58mm H ) demand 360 thrust bearing upgrades and eventually need for large shaft t04 turbine wheels
and ultimately these large frame highflows have lots of inertia and spool suffers

staying with the H and under TO4B compressors allows you to retain standard type thrust bearings and the low inertia t3 turbine wheels

the ta34 turbine wheel ( stage t2 turbonetics t3 turbine ) is direct fit small shaft with reverse thread and will help response with a small increase in the major diameter
and helps backpressure issues at higher boosts with a slight decrease in the minor diameter

mixed with T, U , V or H TO4b fronts these ta34 turbine highflows max out just over 300 rwhp at 1 bar ish boost
-but give almost stock response while still addressing backpressure ratio issues up top"

Hope that helps!

 

Jake,

for what it sounds like you're wanting to do, just send the core to BNR and they will source the parts they need to fix your turbo. Mine was shelled out when I sent it to them, because the guy I had rebuild it previous didn't understand lefthanded threads shouldnt meet a right-turning impact gun (I was pretty mad when I found out). Sent it to BNR, they took care of the rest. They can get parts to build the turbo to their design and it will be just fine.

As far as an inlet elbow, what I did was got a 3" silicone elbow off ebay. I mated it to the stock intake by getting a piece of pipe that fit into the new elbow, and used a peen hammer and some patience and rolled a bead onto the top end so it matched up with the stock upper elbow that has bungs for the blow off valve, etc. I also reinforced the new elbow by cutting a sliver of a metal elbow, and slid it inside the rubber one, so it wouldn't collapse inward. If you're interested, I can pull it off this evening and take some pictures for you and you can see how I did it.

 

Hey so i bought that compressor and the threads dont match up to the nut as the shafts too wide, curious as to how yours all matched up? It also doesnt fit through the hole in the thrust spacer