Best bolt-on twins for RB26, ~300kw?

[Matty George]

Thx Robzilla. Was gunna get Bosch 1000cc and 255 Walbro. For a little more I’ll go the 460im thinking

16 hours ago, Robzilla32 said:

Raceworks 1000cc and Walbro 460lph

 

[r32-25t]

May as well go the 525 now that it’s available 

[joshuaho96]

Why use more fuel pump than the turbo could ever possibly use?

[r32-25t]

Future proofing cause you’ll always end up wanting more 

[Matty George]

I understand the theory mate as we always seem to be chasing. I’m going to use 460 l Waldron with Bush 1000cc and that will hit my 300/320 awkw goals.

[Jumbotron]

On 7/4/2020 at 1:38 PM, joshuaho96 said:

Why use more fuel pump than the turbo could ever possibly use?

Did you end up going with the GTIII SS? What were the results and how are you liking it?

[joshuaho96]

20 hours ago, Jumbotron said:

Did you end up going with the GTIII SS? What were the results and how are you liking it?

Life has an interesting way of distracting me from projects. I basically threw them on and I've been running wastegate boost on the stock tune. Response appears to be roughly the same as stock R32 GTR ceramic turbos. If you want a ball bearing CHRA and more power capability I think the Nismo R3 turbos were probably the way to go but they're discontinued now after being sold for like a year at best.

[Jumbotron]

21 hours ago, joshuaho96 said:

Life has an interesting way of distracting me from projects. I basically threw them on and I've been running wastegate boost on the stock tune. Response appears to be roughly the same as stock R32 GTR ceramic turbos. If you want a ball bearing CHRA and more power capability I think the Nismo R3 turbos were probably the way to go but they're discontinued now after being sold for like a year at best.

Yeah with the exchange rate these GTIII-SS are tempting, about the same price as the -9s...

[joshuaho96]

5 minutes ago, Jumbotron said:

Yeah with the exchange rate these GTIII-SS are tempting, about the same price as the -9s...

When I look up -9s these days some suppliers claim they're discontinued by Garrett. I don't know what the truth there really is.

[GTSBoy]

9 minutes ago, joshuaho96 said:

When I look up -9s these days some suppliers claim they're discontinued by Garrett. I don't know what the truth there really is.

They're such old tech that every Taiwanese/Chinese knock off turbo manufacturer has their version for sale anyway.

[joshuaho96]

6 minutes ago, GTSBoy said:

They're such old tech that every Taiwanese/Chinese knock off turbo manufacturer has their version for sale anyway.

The interesting thing about the -9s though was the ceramic ball bearing, at least the 836026-5002S.

[r32-25t]

9 minutes ago, GTSBoy said:

They're such old tech that every Taiwanese/Chinese knock off turbo manufacturer has their version for sale anyway.

And id still take the -9 over the new hks turbos 

[joshuaho96]

3 minutes ago, r32-25t said:

And id still take the -9 over the new hks turbos 

-9s aren't a bad idea if the goal is to make more power, they just have a much narrower compressor map than the -7s and probably whatever TD04HL thing the GTIII-SS is. 

[GTSBoy]

6 minutes ago, joshuaho96 said:

The interesting thing about the -9s though was the ceramic ball bearing, at least the 836026-5002S.

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.

[hypergear]

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.

Edited April 18 by hypergear

[GTSBoy]

7 hours ago, hypergear said:

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.

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.

But let's also be clear about what is meant by "build". At your price point I can't see you making cores from billet on a mill, even if CNC, or doing all the machine work on a rough casting. Surely the lumps of metal are sourced more or less ready to go from an Asian supplier, right? Maybe the same with shafts. I mean, you could turn shafts up yourself, but it's pretty slow going for items that are all essentially bulk order producable.

I was always perfectly willing to believe that you assemble your wheels to shafts, fit up bearings and do all the balancing. I actually expected that you would have been doing all that even if the core did arrive from a supplier with most of that pre-assembled.

Nevertheless, please accept my apology.

[hypergear]

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. 

 

Edited April 19 by hypergear