hypergear

June 4

Updating results.

Using ATR45SS-0 model VS UHF57-900. Those two are very different turbos, different wheels sets with different wheel hub profiles but yet with almost identical result. I’m intrigued with both turbos performance.

ATR45SS-0 was a 61mm turbo first developed in May 2020, UHF57-900 was a 62mm turbo developed in March 2024 as a powered up alternative of a G30-900.

On paper ATR45SS-0 maxed at 563rwkws, while UHF57-900 maxed at 568rwkws. ATR45SS was slightly more responsive with slightly better power band through the mid range.

Road driving ability, ATR45SS-0 had better throttle response, felt more robust under throttle, as it wakes up earlier. I think G series wheel hub design made it to have higher inertia under light throttle.

Doing bit more prototype work in the next few weeks, will update result when its back on dyno again.

ATR45SS0 Blue, UHF57-900 Red

Chequered tuner's Dynapack hub dyno, E85 fuel. Mod list is in video below

May 28

The housing it self made minimum differences, while the exhaust manifold made a difference. 6 Boost T3 divided will do fine. ATR43SS3ProR model in T3 .82 rear (TS optional) from March 25th will be more then capable of 450whp with excellent response.

May 19

T51R mod is an Antisurge slot. With exception that it has few extra legs on the base of it which makes a sound, and it needed to be inserted into the comp housing.

May 12

Yep, I was supprised. Its all about flow rather then housing size.

Doing G35-900 Vs ATR45SS-1 Next. 62mm V 61mm.

May 4

Further result update. This is from our ATR43SS3 model in T3 .63 rear housing, run against None Geninue G30-770 and 900 spec turbochargers in T3. 82 turbine housing. Those turbos are ideal for RB25det motors, Since I've got a bullet proof RB30det, its been used as test bed instead.

All three turbos run to a point that no more boost could be held and no more power could be made. Same test car and exact vehich setup as been used testing all three turbos:

April 19

2 hours ago, GTSBoy said:

Oops. Sorry mate.

It is both excellent to hear and also surprising though. The amount of work required to (effectively manually, not on a production line) build a core vs your low retail price point is why I presumed that you were buying cores.....

Well, I do turn bearing housings, shafts and wheels on special orders, so you can order any wheel sizing preferred. Parts came from every where obviously, came from reconditioning turbos and been shafted, I know exactly where certain manufactures would stuff up. It sounds like I'm just assembling cores, but importance is I get to check if all parts are made to specs, if castings are right, all clearances and runout are right, balanced ok, bearing pack sounds before passing onto clients. Building test cars, doing dyno testing and sponsoring drift cars is all parts of QC, so I get to know how a particular package performs before selling.

Yep, its slow and ineffective way of production, but I prefer less headaches.

April 18

On 17/04/2024 at 9:57 AM, GTSBoy said:

Um, OK. But....my Hypergear highflow also has ceramic BB core. That's just come from some Taiwanese/Chinese factory. It's not like Tao builds the cores himself in his own foundry-factory. It's not rocket surgery any more.

I hate to interrupt, there are enough internet rumors. I do build every single CORE in house that leaves my workshop including the one that you are using, as well as engineering work done on your turbo housings. Reason been is I got shafted badly by a turbo joint 18 years ago when the business first started. I since trusted no one when comes to selling anything under my name, or I just don't touch them at all.

March 25

Updating results:

Today we’ve tested the 3rd custom turbine shaft for this compressor. New turbine have managed to pull 568rwkws at 29psi E85 fuel at a point that no more power could be made, which is 71kws gain over standard G30-900 and within 220RPM @ 20psi in response.

In comparison to all 4 turbine wheels including original G30, current turbine is 17kws short compare to sample 3 above, but it has similar drive ability to original while making significant gain in mid top rev range.

Vs UHF57 above

Dyno video:

March 25

This might be interesting for some people whom after abit more then a G30-900. This is a comparative graph running an G30-900 copy Vs G30-900 revised (Ss3ProR). Very similar in response to a G30-900 while making 71kws of extra power. Test car is on a Rb2530det run both turbos to a point that no more power could be made. T3 .82 rear housing, E85 fuel, Hub dyno tuned.

March 9

Uploading dynot results from last week. This is our in house built G30-900 Vs two of our revised versions of G30-900. Pretty interesting as current prototype turbine with +2mm dia managed to make 88kw over standard G30 turbine. Green is another revision of G30-900 with a more free flow turbine aka ATR43SS3ProR. All three cores uses T3 .82 turbine housing. Latest prototype also shown +500RPM of lag, I do have one more prototype turbine to test, hopefully closing that gap alittle. test car is our Rb2530det R33 GTST with cams.

March 4

Differences will be minimal. If U do have concerns go for geninue core.

March 4

A quick note that we will be releasing popular Rb25det hot side bolt on G / GTX configurationed turbochargers, including internally gated, externally gated and externally gated plumb back versions. Geninue core can be supplied at additional cost. Link below:

https://hypergearturbos.com/product/rb25detgngtx/

March 4

We do offer a smaller G2 version of high flow that works with factory boost levels and tune. It will be maxing towards 250rwkws once tuned however.

Also we build custom G / GTX style of bolt on turbos by request, the biggest that would work internally gated would be an G30-660, G25 turbines are too small for Rb25det motor.

March 2

1 hour ago, Dose Pipe Sutututu said:

I'm assuming you're asking about my current turbo?

It's a Garrett GTX3576R Gen 2 with a 1.01 divided turbine housing. Made 437kW with 1.8 tapering down to 1.6bar.

The latest UHF55mm have out performed G30 turbine extremely well on my Rb2530det using a T3 .82 rear housing carring a G30-900 compressor wheel. It will be alot more responsive in comparison to a GT35 turbine in 1.01 rear while making about the same power. This turbine wheel and rear housing is currently out of the test car, I can swap them into your current turbo for some feedbacks if interested. PM for details.

March 2

5 minutes ago, LjB123 said:

Thanks. What situation would i need to get a manifold spacer with it?

Spacer is only required for T51R modded housings.

March 2

1 minute ago, LjB123 said:

What turbine housing option was used on this one? What difference would i see between the .63 and .71?

The one on car above is .63 which is also more responsive

March 2

45 minutes ago, LjB123 said:

What would you recommend as a step up from the SAT model to get similar/slightly more power, but external wastegate?

Was looking at getting the external wastegate plumbed back kit you sell. Have you any feedback on how the plumbed back merge goes with back pressure? I see the merge is in a really good spot, as its on a bend and transitions nicely, just heard things about people plumbing back, especially so close to the turbo outlet. Whats your thoughts?

The latest version of bolt on would be the ATR43SS-2 models, turbo is more responsive and has higher power capacity. We have a member in NZ did a built recently with it using the external gate plumb back setup that made a pretty healthy 311rwkws on P98 fuel. Anyone got a link to his build?

March 2

ATR45 was an initial model similar to a TD06H-25G, the ATR45SAT in T3 .63 rear housing was developed few years later made to fit Rb25det engines. Current model has better response then earlier models.

March 2

First of all, the rant blocked everyone whom left possitive feedbacks and removed their comments. Its a none brainer to workout that guy got issues reading at post he's ranted about others.

We've built alot of turbos for the past 19 years, some of the big ATR45 turbos are not made for Rb25det, since they all T3 people just fitted and used them any way. Current models are even more responsive, once fitted to a proper setup.

Put it in this way. if you found current model ATR45SAT extremely laggy, send it back and I will refund you in full.

March 2

Posting update.

This is a revision of G30-900 turbocharger. Third revision managed to pull 95kws more on top of the original G30-900. Recap:

Car used for test and tune is an Rb2530det powered R33 GTST.

Engine Specs:

Rb25det head with forged Rb30det bottom

Forged pistons and con-rod

Upgraded Valve springs

HKS 256/ 264 drop in cams

Fuel system:

1650cc Bosch fuel injectors

Two 460L fuel pumps

ECU:

Haltech ECU

5-0 Trigger kit

Turbo side:

Hypergear ATR43SS-3 Prototype turbo

6 boost high mount exhaust manifold

Turbosmart 50mm external gate

3 inches road legal turbo back exhaust with 2.5 inches cutout pipe for testing purposes only.

Hub Dyno Tune: Chequeredtuning Victoria

Car makes just under 300rwkws by 4000RPM in a standard 5 speed manual, peeked 586rwkws on E85 fuel. Turbocharger is not maxed, I will add more boost into it when my build box is back in action. Comparison graphs to the original G30-900 will be uploaded in comments coming week. Dyno video for now:

March 1

The ATR45SAT if you are going to run it on Pump 98 fuel with a very free flow engine setup on a very healthy standard engine you will likely be making 280~300rwkws mark and up to 350rwkws on E85 fuel. Turbo is capable of making 400rwkws on externally gated on E85 fuel.

Housing sizing has been updated. The inlet size is 3 inches and outlet size is 2 inches. Hot side is T3 that fits your standard exhaust manifold and dump side is 6 bolts that fits factory dump pipe. Turbo comes with braided oil line, banjo adapters and oil drain adapter.

Client result from Uni group. R34 4 door, with front mount cooler, 3.5 inches turbo back exhaust, 3 inches metal intake pipe, fuel system upgrade and programmable ecu. P98 fuel 307rwkws @ 20psi

March 1

Yes this is a member from NZ. Thats using the turbine housing external gate kit plumbed back, currently sitting at 311rwkws @ 22psi on P98 fuel.

February 22

I might have misunderstood the question. In my opinion, external gate bleed off factory exhaust manifold should make more power as it is restrictive towards the turbo flange

February 22

Good to see you've rose this question. How much power the engine makes is determined by how much air this engine system can flow in a given period of time. So at given boost pressure a more free flow system processes more air, burns more fuel and makes more power. It is the reason that when identical turbochargers were built, cars that ended up with more power always had a better flow engine system.

So you plumb the gate back, then exhaust flow will still be restricted by capacity of the exhaust. I've attached a dyno result from an earlier run which is External gate V External gate plumb back with nothing else changed out of a 3 inches turbo back exhaust. So in a simple answer, Externally gated system makes better power.

Older ATR43SS-2 turbo:

Green: External gate V Blue: External gate plumbed back

February 20

The 21U turbo is too small for a RB2530det engine. It can work with one of our externally gated 6 bolt .82 rear housings. The housing comes as a kit with screamer pipe and turbosmart 45mm gate.

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