[email protected]

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hobbs

Torque is pretty weak for a RB25, WHP figures are nice though. What compressor wheel are you using? 20G?

[email protected]

252.9 WTQ is weak for 9 psi?

It's a custom PURE TURBOS BILLET compressor wheel designed for the RB. There is no "off the shelf" compressor wheel that fits this turbo.

Thanks

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hobbs

Well considering at stock boost pressures (7psi) nissan as rated the non NEO RB25DET at 235ft/lb, so a stock turbo at 9psi would be close to your posted 252ft/lb. Any size dimension on the wheel that is in this turbo?

[email protected]

Is the 235 ft/lb rating at crank or at the wheels?

Sorry, we don't give out the internal specs.

Let me know if you have any other questions.

Thank you Sir!

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801nismo104

thats impressive!

splitfire

What's the point of not giving the specs? Any determined man (and definitely, a company) can disassemble the turbo and do all measurements.

[email protected]

Point is to prevent copy cats. And if you want to copy it, you have to buy it.

Basic specs are:

CW Inducer: ~54mm

TW Exducer: ~56mm

Thanks guys.

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steve shadows

It's not bad at all. The only thing is what type of dyno was this done on? What was the correction factor for weather or gearing etc? This would probably be around 285-295 on a dyno dynamics. Still not bad though.

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[email protected]

The customer supplied this info to us so unfortunately I don't have any specifics related to correction factors. It appears it was a DYNOmite dyno which would be a "Land-and-Sea" Brand dyno.

The customer is adding supporting mods (injectors, pump, etc...) to start cranking up the boost. He should be putting down some solid numbers pretty soon.

We thought it was impressive for a stock motor on 9 psi...

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Kingtal0n

OEM camshaft? A/F curve?

oem injectors, orly! OEM manifold too? Internal gated?

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singlecamslam

What kind of computer was being used please?

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Croustibat

flow map please.

Right now we just have a claim and no info. This looks way more like an ad than a real thread to me.

cotbu

DejaVu moment!

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ch1873857

pretty sure theres both. theres a dyno graph. its literally right there in his first post. your just requesting more..



if moderators deem this thread to be in the wrong section. they can easily move it.

funktown240

Many turbo manufactures dont provide compressor maps such as Precision turbo. I personally don't care about compressor maps and go off of real world data. This billet upgraded compressor wheel should be plenty big to support 450 whp. I too am skeptical about the HP with 9 lbs but I would consider what kind of dyno was used because they can vary greatly.

Croustibat

Would you buy an engine without a rev limiter, without knowing its rev limit, and without knowing its output ?

Of course not.

Then why do you accept this from a turbo manufacturer ?

A turbocompressor purpose, as its name implies, is to provide air flow at some pressure, and it has limits.

A flow map tells you everything you need to know about the turbo. Its limits, its efficiency and what it can achieve. It also tells you the manufacturer knows about its products and has means to test and validate them.

A turbo manufacturer not showing its flow map would be like a car dealer that refuses to say more than "it is a car, and it has an engine, but i wont tell you how much HP it makes nor how high you can rev it. Use it till it blows, and sit on your warranty".

I know too well how the performance world works. When it is too good to be true, it usually is.

Kingtal0n

someone will buy the turbo and turn up the boost until it gives out then post the results. If two or more people do this we will have a really good idea what it can do. I am more curious how an oem internal RB engine can have maximum Volumetric efficiency at 7K rpm than anything. (rb must have cams?)
but what series is it!!! In an S13? Must not be a neo engine, amirite? See what you did, now I am stereotyping the 13

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[email protected]

A compressor map tells you a lot about the turbo. It's a good piece of information.

It does not tell you everything you need to know about the turbo.

It is a map of the compressor wheel only.

Things that can hinder the performance and potential of the compressor wheel:
Compressor housing size
Turbine housing size
Turbine wheel size
Improper balance
Machining clearances
etc...

Real world data (dyno sheet) is the final end result and it's the best way to see what the turbo can actually support. It takes all the other previously mentioned turbo components into account.

Our billet wheels make big power. We recently upgraded a customers GT2871R 52 trim with our billet wheel. He's in europe running a fully built toyota 1.5L motor. He made 416whp and 425Nm of torque at 2.0bar of boost. This is not an amazing result but it shows that our billet wheels work VERY well. Another simple example is a GT4202R we upgraded to our billet wheel. It is on a diesel pulling tractor and made 918HP and 2206 Ft/Lb at 97PSI!!! Yes that's right, our billet wheel survived up to 97PSI with no issues.

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funktown240

Have no clue where you are coming from talking about motors. If you know alot about turbochargers you can usually tell how much HP a turbo will make just based on turbine and compressor wheels but there are many variables. These new billet wheels that are being used by many different manufactures are making more horsepower than there cast counterparts.

Anyways, I dont want to get into a pissing match. The one thing that everyone is missing is THANKING Jesse @ Pureturbos for providing a replacement turbo for RB20/25 capable of this much HP. No one else in the business is doing this!! I have called other professional turbo rebuilders and they would not even consider touching the turbo, not even just replace the ceramic turbine wheel.

THANK YOU JESSE, If I hadn't gone with a top mount setup you would already have my money.

Driftpretty

i believe it..i know plenty of evos and celicas running modded stock turbos and making good power from just that and small bolt ons.

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[email protected]

The only thing we are claiming is that we build great turbos, because we do. As for the dyno info, we are relaying info that a customer gave us who is running our turbo. I'm not understanding how he pulled around 400 crank HP out of stock injectors, but he says they're stock. I didn't think stock RB25 injectors could flow that much fuel even if they are maxed at 100% duty cycle. But I've never tried myself so I wouldn't know for sure.

I understand when results like this are shown, there is going to be tons of doubt and naysayers. We were blown away by the results. I will contact the customer and let him know that he has a lot of people doubting the info he gave us. I will ask him for more details on everything.

I'm assuming you're asking for a compressor flow map. We don't have a compressor flow map for this specific compressor wheel. We have the capability to have a compressor wheel mapped out by one of the companies we do business with. They have a full gas stand room and the proper engineers to do the service. The cost of mapping all the performance compressor wheels we use would be insanely high which is why smaller turbo companies like Precision Turbo, Forced Performance, Comp Turbo, and others don't provide compressor maps. There are none. The real reason is cost. If you call some of these companies you might get the answer "we don't release them to the public", or "we are still collecting all the info to publish at a later date". The reality is they haven't been mapped. Some companies are afraid to say that and would rather lie, we are not. Just because a wheel is not mapped does not mean it is not a good wheel. A compressor map is a good piece of info to tell you what the compressor has the potential to do. There are so many variables involved with the end result that a compressor map is only a small part of the equation. Variables like: turbine wheel size, balance tolerance, machining clearances and tolerances, etc... The chassis dyno result is the end result.

Thanks guys

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Croustibat

I'd rather know BEFORE running a turbo that i am going into surge or overspin territory, not when i install and break it.
That is the turbo manufacturer job to tell me which efficiency i am going to get, too.

I am not talking about what could limit a turbo application on an engine here, i am talking about the primary function of a turbo compressor. That function is giving airflow at a given pressure at a given efficiency, at a given turbo speed.

And yes, i want to know all that before trial fitting it to any application. Engine dyno is a power result, which may be great, but it does not tell you if the turbo is going to break because it is spinning too fast or surging all the time.

Kingtal0n

dont mind crousti she is having her time of the month right now. check back in a week or so

i.e. where is your stack of trial and error compressor wheels bought from manufacturers that have provided maps?

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AdamR

I feel like I type this same reply to you all the time. What in the hell are you talking about?

funktown240

Whatever dude, obviously you have some obsession with compressor maps. I guess if a turbo doesn't have a corresponding map then it must be junk.

AdamR

He has good reason to be skeptical.
Some random advertiser has posted one dyno graph that they can't confirm anything on. If they don't have the compressor map, they probably haven't done enough R&D.
Anyway, is there really a market for a modified RB25 turbo?

funktown240

There absolutely is, I went with a top mount manifold and a GT35R set up and had to replace all the oil and coolant lines. I could have saved a lot of time and money if there was an easy bolt on replacement of the stock turbo. True the turbo I have now will easily make more power but I would have really considered this turbo if it were available a year ago.

[email protected]

Well there is no RB25 BILLET bolt on turbo that comes with a compressor map (from ANY company). So it looks like our turbo is not for you.

Sounds like you should be buying:
-new T3 manifold
-new Garrett turbo (with compressor map)
-new downpipe
-intercooler pipe adapters
-coolant line adapters
-oil feed line
etc...

Looks like you'll be spending a lot more than what our bolt-on turbo costs. But at least you'll have your compressor map. You can even print it out and keep it under your pillow at night! Just kidding, I appreciate the conversation.

I agree that compressor maps are good pieces of info, but they are not mandatory or critical in my opinion. We have used this compressor wheel in other performance turbo applications that have made 450whp. The superback dimension and the shaft bore is different but the wheel is the same.

BTW: Other items coming soon...
RB BILLET turbo (ball bearing version)
BILLET Journal bearing bolt-on SR20 UPGRADE turbo (with GTX2863R WHEELS!!!)

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Croustibat

Indeed. I'd rather get a proven solution. I do tests for a living amongst other things, so i know how much that kind of thing cost, and why only serious company pay for them. I also know a compressor flow map directly derives from the computations that lead to its design, which tests usually complete, or confirms.

So basically, you dont want to pay for tests, and you dont have the design computations either. Maybe that is because you are not qualified for compressor wheel design ? Maybe that is because you used the chinese "lets copy someone else design and mod it a bit to call it our own" method ?

I also dont believe in miracle. Previously there was a "batmowheel", with the exact same kind of claim. Custom billet wheel without any analysis data.

Now this. Seriously ? Yet another miracle upgrade with no other data than a dyno sheet ?

A compressor wheel is a compressor wheel, what matters is its design, not the material or the machine used to create it. Yes, you can get more precision on the fabrication, tighter clearances, but if your design is no good, precision does not matter. And if you just copy someone else design and add "cool feature", then you dont know if it is good. By good i mean a regular flow with reliable efficiency, no strange surge zone, no fragile regions and so on.

Was this even fatigue tested ?

If this is true, then i wont hesitate anymore to call the BS flag.