Greddy/Trust working on Turbo Kit

First up is the RZ34, the company's parts development vehicle and fastest attack machine. We struggled with the piping layout and airflow mounting position, but the turbine kit using TD05H-18G took shape. With the fuel system still in stock condition, we have confirmed 567ps & 71.9kgm at a maximum boost pressure of 1.35kg. ``To bring out the performance of the turbine, we are also developing a fuel system capacity increase kit,'' says Yonejo.

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The cooling system is equipped with an air-cooled type front-mounted intercooler instead of the original water-cooled type. The reinforcements will be rebuilt to save space, and the sonar for collision safety braking will also be relocated. With the shift to air cooling for the intercooler, checks were also conducted to ensure that it could be controlled without problems with the genuine ECU. A stand-alone display is also planned at the venue to show the layout of the turbine and piping.The wastegate pipe is open to the atmosphere as it is being tested, but in the production version it will be changed to a type that returns to the exhaust pipe

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Jah_Happy said:

Nice! I saw Soho had built a front mount intercooler a few months ago but i havent heard anything about a public release. Cool to see Greddy going at it as well.

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PriZ said:

I've done some reading on this since it was first posted. These pics do a good job of showing it too. Seems like instead of creating an all new custom turbo they created a fitting that allows some of their existing turbos to bolt onto the engine. Due to this, they had to switch to an external wastegate (instead of the internal ones that come stock).

There are benefits and drawbacks to their approach. If nothing else, this is probably the way to go for pushing top tier power. But it does come at the expense of more complex exhaust routing, tighter install clearances, and OE sensors possibly not working as expected. Also, the factory air-to-water setup has very efficient routing and perform just as well simply by upgrading the heat exchanger, intercoolers, and coolant pumps. All of the air-to-air reroutes don't seem to massively outperform (based on what SOHO has released so far), despite the extensive changes and winding routing needed to install them. Seems like they have some challenges to work through before bringing this to market.

I think what I'd like to see is the turbo and wastegate setup from this kit, on an upgraded air-to-water intercooler system, and see how that compares to their air-to-air setup. The air-to-air may not be needed. I'm personally leaning toward staying air-to-water myself.

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Fairlady_464r said:

But Nismo themselves went A2A for their GT4 car. I doubt they would’ve gone through all that effort of changing the entire charge cooling system if they didn’t see any gains that were worth it. Their GT4 car also suffers much more abuse than any street Z out there. Even those high hp roll racers don’t endure temps a GT4 car would. Lapping a circuit multiple times puts much more stress on cooling than doing a few pulls on the highway. Although this is assuming your A2A setup is comparable to whatever secret sauce Nismo uses for their parts/construction.

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