Hypergear Turbochargers and High flow Services Development thread

[Blackkers]

And by the way, I've made some custom exhaust wheels that is for the GTR OEM high flows. They are engineered to support 300 ~ 350awkws region on pump fuel and response will have similar to stock twins. My car's waiting for bits and pieces, so if any one is interested to evaluate please let me know, I will put a special offer for $1200 on both turbochargers.

-9 alternative at half the price of Garrett items Edited July 7, 2015 by Blackkers

[Anfanee]

And by the way, I've made some custom exhaust wheels that is for the GTR OEM high flows. They are engineered to support 300 ~ 350awkws region on pump fuel and response will have similar to stock twins. My car's waiting for bits and pieces, so if any one is interested to evaluate please let me know, I will put a special offer for $1200 on both turbochargers.

fk me i wish i didnt have brand new -7's...

[Piggaz]

Sell, buy these and use profit elsewhere?

[jet_r31]

Hows the R34 development hack going Stao?, You havn't dynoed a SS based version of the ATR 45 SAT on a rb25 for that yet have you, only the normal ATR45 SAT version?

cheers

darren

[Cowboy1600]

Hows the R34 development hack going Stao?, You havn't dynoed a SS based version of the ATR 45 SAT on a rb25 for that yet have you, only the normal ATR45 SAT version?

cheers

darren

Stao, which version did I end up with? The SS based or normal ATR45 SAT?

[hypergear]

The SS based SAT made too much torque which my current clutch couldn't hold it. But let me know if you wish to try, expecting to see around 450rwkws mark.

[hypergear]

took about two weeks to get my order of a PWR intercooler delivered. It came with a pretty good looking box (they asked $11 additional for that box), polished tanks and pretty neat welding:

Compare to the Takashi, end tanks looks quite similar, except PWR is hand welded and Takashi is one piece die-cast.

However the core interior is quite different. The PWR's cooling fins are neatly 45 degrees angled and dead straight, while the Takashi is all over the places:

So hope to see a difference on the dyno on Monday, and will update results when ready.

[Badgaz]

This looks like the difference and similar test i did between a genuine blitz return flow and a Chinese copy. Made 7kw difference on mine

[Super Drager]

Nice video footage.

This is a set of rather unusual high flow jobs. Pair of high flowed 2860-5s into ATR28SS15. Its going to a Rb30det engine with Rb26 head. Hopefully they will solve the back pressure issues currently experiencing with GTRS turbine wheel. One more thing that I'm alittle concern is the back pressure in the exhaust system as the ATR28SS15 is ideally made to run on a single 3 inches turbo back system, that GTR is pretty good of having 4 inches turbo back exhaust, still have to be shared with two turbo how ever. I've made some oversized thrust collars for that purpose, hopefully be seeing close to 500rwkws with those once fully running.

Can't wait to see results of this, a guy over on AUS300ZX made 492rwkw on his GT2860-5's so i want to see how much your version can make.

[hypergear]

This is the lastest results for our evaluations on intercoolers using 173,000KM fully standard Rb25det Neo motor and our ATR43SS2 Rb bolton turbocharger. The result is intriguing, and I have personally never ever thought it would turnout this way.

The test car (r34GTT) has:
1000cc Bosch injectors
Walbro 470L/H Fuel pump
Hypergear ATR43SS-2 internally gated bolton turbocharger
Adaptronic Plugin ECU
Just Jap's Front mount cooler piping kit
Just Jap's Turbo back 3 inches exhaust
100 cell cat (don't know the brand)
Tuned by Chequered Tuning
Pump 98 fuel

Pressure monitored from both inlet and outlet of the intercooler

Nothing has been changed on the car apart from the intercooler it self. The result indicates the effects of cooler change, this may or may not apply to other cars apart from mine, it obviously does not mean you should be spending more money on your cars, I'm not promoting or in favor of any manufactures.

Result are based on very similar boost levels:

Takashi 600x300x68mm cooler:
267rwkws @ 19psi after cooler or 23psi before cooler

Takashi 600x300x100mm cooler:
278rwkws @ 20psi after cooler or 24psi before cooler

PWR 600x300x81mm cooler:
303rwkws @ 20psi aftercooler or 22.4psi before cooler
295rwkws @ 19psi aftercooler (blue is from Takashi 600x300x100mm cooler)

[CEF33Y]

Wow.

[Dose Pipe Sutututu]

what Intake Air Temps are you registering?

I wonder if it's more so the intake temp that's promoting more power rather than flow, etc.

[Badgaz]

what Intake Air Temps are you registering?

I wonder if it's more so the intake temp that's promoting more power rather than flow, etc.

That's what it was thinking and asked on fb about temp changes pwr cold to touch. Edited July 14, 2015 by Badgaz

[hypergear]

Other thing it might be worth mentioning is the PWR's core has no inner fins. They are just straight triangular tubes. Which naturally less resistance. That shown up on the power and torque curve after 5000RPM, engine is definitely getting more air there.

[Kinks]

Fascinating stuff, Stao. Love the detail you're going to, it is a puzzle. Would be nice to see intake temps logged as well, although the PWR straight fins / less resistance if anything I would expect to see higher intake temps. Possibly on the NEO, flow matters more than temp. Maybe this is to do with the camshaft and how efficiently the cylinders fill/scavenge. The Neo certainly seems like it loves to breathe, I noticed a "seat of the pants" improvement even from having a straight through muffler but I couldn't tolerate the noise so had a triflow put in.. but I'm guessing the JJR exhaust is some straight-through canon type thing (ugh).

[BoostdR]

PWR uses a design borrowed from the VR4 and EVO's over a decade ago. The little nodules on the inside of the core actually create a larger surface area over traditional intercoolers which cools better whilst increasing flow capacity. The Delta fin(Apexi Style) of the Takashi reduces flow over a comparable 68mm core which also lets it down.

Best cooler to date I have tested is the ARC R Twin entry, flared bell mouth style inlets, flow through knife edged tubes(outside air for radiator). If only you could use the EVO/PWR style core with the ARC core (inlet air) bell mouths you would have it all so to speak. Pity they are almost impossible to find these days.

Matt

Edited July 15, 2015 by BoostdR

[muzziak]

PWR uses a design borrowed from the VR4 and EVO's over a decade ago. The little nodules on the inside of the core actually create a larger surface area over traditional intercoolers which cools better whilst increasing flow capacity. The Delta fin(Apexi Style) of the Takashi reduces flow over a comparable 68mm core which also lets it down.

Best cooler to date I have tested is the ARC R Twin entry, flared bell mouth style inlets, flow through knife edged tubes(outside air for radiator). If only you could use the EVO/PWR style core with the ARC core (inlet air) bell mouths you would have it all so to speak. Pity they are almost impossible to find these days.

Matt

Do you reckon replacing a Takashi 68mm core with like a JustJap 78mm will cause any differences and be worth it ?

[hypergear]

Here are data from few weeks back. Takashi 600x300x100mm / 600x300x68 cooler vs JJR 600x300x76mm cooler.

[BoostdR]

Tao's testing points to yes a JJR cooler is better but a 100mm Takashi would be better still.

Matt

[hypergear]

Laggier tho