Hypergear Turbochargers and High flow Services Development thread

[hypergear]

25 minutes ago, silviaz said:

I thought that the high flowed rb25det turbos were a lot more responsive than the stock one? Would that mean better low end torque?

Greater amount of energy is required to turn larger wheels up to speed, there for laggier. However bigger wheels are capable of flowing greater amount of air through both housings, let the engine burn more fuel and makes more power that way.   

[silviaz]

1 hour ago, hypergear said:

Greater amount of energy is required to turn larger wheels up to speed, there for laggier. However bigger wheels are capable of flowing greater amount of air through both housings, let the engine burn more fuel and makes more power that way.   

That makes sense.

[SeanR32GtSt]

Got my 34 gtt dyno tuned with the G3 turbo (the one rated for 450). Dyno reads 8% lower than actual numbers. Car made 309 whp on 14 psi. Stock manifolds. 650 injectors. Walbro pump. Mac valve boost controller. Haltech ecu. 

[Dose Pipe Sutututu]

On 23/12/2024 at 12:29 PM, SeanR32GtSt said:

Got my 34 gtt dyno tuned with the G3 turbo (the one rated for 450). Dyno reads 8% lower than actual numbers. Car made 309 whp on 14 psi. Stock manifolds. 650 injectors. Walbro pump. Mac valve boost controller. Haltech ecu. 

Is your VCT working?

That curve looks like your VCT isn't engaging 

[SeanR32GtSt]

2 hours ago, Dose Pipe Sutututu said:

Is your VCT working?

That curve looks like your VCT isn't engaging 

That’s a good question. I’m not sure. It feels laggy for sure. How can I diagnose that?

[Dose Pipe Sutututu]

1 hour ago, SeanR32GtSt said:

That’s a good question. I’m not sure. It feels laggy for sure. How can I diagnose that?

Unplug it and see if the car makes a difference 

[hypergear]

Might also needs a stronger actuator with the right preloading. With older 2019 built bush G3 units, BB upgrade or 21U housing down size makes a pretty decent gain in response as well. 

[SeanR32GtSt]

31 minutes ago, hypergear said:

Might also needs a stronger actuator with the right preloading. With older 2019 built bush G3 units, BB upgrade or 21U housing down size makes a pretty decent gain in response as well. 

I know this one’s the BB one. My tuner did make mention about the actuator. I am curious about the VCT as well

[hypergear]

Updating results from our ATR43SS-1 turbo in T3 .63, OEM bolt dump pattern. Not a big number but pretty sweet for a stock Rb20det. Car's managed to pull 220rwkws at 20psi, perfect boost control internally gated with EBC and excellent mid top end power band as they usually skydive after 5.5K. Usual bolt on supporting mods and inlet plenum and factory location exhaust manifold. Pump 98 fuel was used (Ron 93).