Hypergear Turbochargers and High flow Services Development thread

[kingtube69]

A leaking power steering bottle

Bought heaps more hose yesterday and some clamps to fix it while I have the space.

[kingtube69]

Almost looks as if it belongs there

[jay-rod]

Yo Stao

I have your ~2010 model atr43g3, which you high flowed into a ss2 around 2013.

Thats on my 34 at the moment ( your new ss2 sounds to good to pass up, i want it now lol )

Now onto my question, i have got a patrol that is getting a rb25 transplant.

Obviously i want more power in it so it can actually lug around the 3 tons, but i think the SS2 or possibly even the highflow op6 will be to laggy for what i need.

I was wondering if you have anything that could get boost on early, earlier the better, but still make some decent power.

Close to 2500-3000 rpm is what im hoping for .

[Artic Choc]

^ standard turbo or u21 will be your best bet for spooling quick but thats still around 3000-3500 for u21 depending on suporting mods

[hypergear]

For some thing responsive the 21U high flow is recommended.

[admS15]

^ive got the 21u highflow on mine. Made 248rwkw @18psi with a quiet restrictive nismo 3 inch exhaust and return flow cooler. Full boost @ 3450rpm. Tuner says could make 10-15kw more with better fliwing exhaust.

[hypergear]

Following up about the 3inches diameter restriction problem with internally gated ATR45. I've made a simple Tee pieces that is attached to the front pipe. It is spring loaded, so gas pressure forces the valve open once it builds up to certain point, while remains shut and quite on cruise.

[Ben C34]

Interesting

[hy_rpm]

Similar to the split dump screamer pipes but only opens with exhaust back pressure

Nice now to see if it works and doesn't sound like a big exhaust leak on idle and light throttle

[GTSBoy]

Those springs will give up after a few hotnesses.

[hypergear]

Some further updates. Those are the CNC machined billet internal gate assemblies made for Nissan RB25det high flows. This upgrade will help stabilising boost and should pickup few extra KWs working with small 21U turbine housings also. This is usually a $200 upgrade job, Now comes standard with all RB20/25det high flows at no extra cost, that is $850 including braided oil feeding line.

[DJSimmo]

Does the above include op6?

Cheers!

[hypergear]

Yes, All RB25det and RB20det engines

[admS15]

Yes, All RB25det and RB20det engines

I'm not sure that upgrade is actually required. I'm not having any boost control issue with my hi flow and I'm not awaren of anyone else having boost control issues but if you want to offer it for free, I don't think anyone is going to argue with you as long as it works properly.

[hypergear]

Bigger waste gate keeps the turbine cooler on tracks and possibly an extra degree of timing. Did that on John Reco's WTAC car this year and it was very successful.

[admS15]

OK but didn't richo upgrade to a bigger turbo altogether? Atr43 I believe or am I mistaking.

[hypergear]

Op6 turbine housing, ss2 comp wheel high flow in .70 housing.

[admS15]

Ok fair enough. I incorrectly assumed it was a atr43 coz of the ss2 wheel.

[hypergear]

Just had time to install the new ATR43SS2 with the DIY dump bleeder.

Car is currently running the ATR45SAT's tune, its booked for tuning on the 9th. The response is similar to the older SS2 but making way more power. That Bleeder vale have made a noticeable difference to upper rev torque, the car pulls all the way to red line. That bleeder is definitely a worth while DIY to do. Will upload results once dyno tuned.

[kingtube69]

Hey Stao,

How does this compare to the ATR45SAT?