Stock Bnr32 Turbo Limitation

[450Nickisonfire]

Hi guys i need some advise before going to dyno i got some stock r32 turbo freshly rebuilt with 360 thrust bearing with the inconel steel exaust wheel + hks axaust + m's air filter + tomei cam gear + nismo fpr + tomei fuel pump ... Ok so my main concern is did these turbo will max out( push hot air ) before maxing out the injector or the maf??? So at all what will maxing out the first thing ???

Sorry for my english :s

Thanks

Nic

[XRATED]

if the turbo still has the stock comp wheel, exh housing etc, the turbo will run out of puff before anything else.... think around 140-160rwkw.

[450Nickisonfire]

Ok because i want something max 500hp i got z32 and nismo 555cc injector at home so maybe ill have to wait for a n1 r34 ballbearing or hks gtss deal this winter

Thanks

Nic

[GTSBoy]

GTR or GTSt? Thread title suggests GTR. OP text suggests single turbo.

Stock GTR turbos ran out of flow at about the same power as the original injectors did, so it's probably a guessing game as to which will clip first when you have an upgraded fuel pump. If the Nismo FPR is adjustable then you might be able to squeeze a little more flow again.

The same comments hold true for RB20DET. The stock turbo reaches a limit (14psi) around the same point where you run out of injector and AFM range (in the 170rwkw range depending on a lot of little factors). But a steel wheeled stock turbo can be pushed to higher boost and so then the limitation is most certainly not the turbo if you have a decent intercooler.

[XRATED]

if the turbo still has the stock comp wheel, exh housing etc, the turbo will run out of puff before anything else.... think around 140-160rwkw.

Ah crap, I was thinking hr32 not bnr32 when you said turbo not turbo's.

Bnr/GTR twins, you'll be looking at around 220rwkw at a guess. It's hard to say without knowing exactily what is in the turbo's.

[450Nickisonfire]

Sorry its for the bnr32 everything in the turbo is stock exept for the 360degree thrust bearing suppose to hold more psi than the conventionel 270 degre and of coirse the inconel steel exaust wheel ... housing stock

Thank you for reply guys

Nic

[jiffo]

The way I read it is Nic has an Rb26 with the e-bay turbines upgrade?

He's done the fuel pump and a few other items so all things being equal it should top out closer to the 300rwkw end rather than the 200rwkw.

Stock injectors would call it a day under the 300rwkw, AFM's would go a bit more.

Turbos would not be operating too efficiently but the upgrade only cost a few hundred bucks, can't expect 21st century results.

[Buraz]

On my old r32 gtr I did the same turbos as mentioned here and with supporting mods got 287rwkw.

[450Nickisonfire]

Can you post a bit of your setup pls and how much boost you have at the time??

Thanks

Nic

[Buraz]

Can you post a bit of your setup pls and how much boost you have at the time??

Thanks

Nic

Yeh mate, just basic mods really.

Front pipes, trust exhaust, decat, power fc, standard airbox with apexi filter and cam gears. 287rwkw spiked to 17.5 psi dropping down to 15.5 in higher rev range.

Everything else was standard on an unopened engine. I replaced injectors and fuel pump later on as a precaution, they were 20 years old as well as reconditioned afm.

[450Nickisonfire]

Pretty impressif for stockish turbo i think with only 16 psi i was told they max out at about 1.4 bar ( about ~20psi) so my guess is your injector or maf where maxed out

Nic

[Buraz]

To my knowledge anything over 1.2 bar they'll lose efficiency. You simply won't make power whatever other mods you have.

[450Nickisonfire]

Ok but with your setup your hi boost is 15psi why dont you just put it to 16-17 psi where he maxed out????

Nic

[Buraz]

Wasn't making that much more power with more boost and you'll find that it won't hold such high boost anyway with standard wastegates and solenoid. This is where it made most power efficiently and safely.

[450Nickisonfire]

Ok thank you for your reply maybe thats why i have abit of trouble to set my boost controller to 1.1 bar for now my hi boost is set to 1 bar like the tuned that i got on the ecu before i put the boost controller

Nic

[R31Nismoid]

End of the day you are still limited by the compressor wheel. Regardless of 360 degree bearings or non-ceramic rear... You'll only ever be making 280-290rwkw as the turbos simply do not flow the air to make anymore than that.