Hypergear Turbochargers and High flow Services Development thread

[R32Abuser]

Different curves = hi and low boost runs?

[Manuel Kasko]

Different curves = hi and low boost runs?

Yeah if you have a look at the boost graph on the below post.

It ran one run at 15psi & one run at 19psi

[R32Abuser]

Yup looked at that and assumed as such...

Mate seemed to think one curve was stock (lower output) vs hi-flow. I said that I would find it hard to believe and that its hardly worth the upgrade if a standard turbo can make ~230RWKW reliably

[hypergear]

They are high flowed on different boost levels. They are actually same chra used in Std 21U/OP6 high flows. Steel wheels and very reliable.

Above is from an Auto 1JZGTE, compare to the manual version it is roughly 10% behind in power.

[hypergear]

Further updates:

John Reco's R33 skyline. standard engine with cooler, exhaust, fuel and ecu mods. 310rwkws @ 20psi E85 fuel.

[Lithium]

So which turbo is that?

[Manuel Kasko]

Edit*

What Lith said

[pipster11]

Hey Stao

I've been out of this thread for a while but I've got a couple of questions.

Its hard to find new CHRA's for stock rb turbos, how much would it cost to make one that fits into stock housings?

My neo turbo is on its way out but I don't want to highflow because it would then need clutch, fmic, coilpacks etc etc, I'm happy with how it performs as it is (its just a daily)

I was thinking the other day, there must be a few people who want a rebuilt stock turbo that won't need to be tuned afterwards.

Would this be something you could make for a reasonable price?

[Super Drager]

Maybe with a steel turbine wheel too

[discopotato03]

A Neo turbo is basically like any other RB25 Hitachi but usually with the larger OP6 turbine housing .

Tao could tell you but the Hitachi centre housing is of similar dimensions to the old Garrett T3/T4 water cooled bearing housing and from memory the water banjo thread size is the same .

The Garrett centre needs a Garrett T3 sized aluminium compressor back plate and the Hitachi compressor housings are almost the same sise where they clamp on . The Hitachi back plate is part of the centre housing casting .

Minor machining lets the Hitachi turbine housing fit the Garrett style centre housing .

Long short if you can find a serviceable RB25 Hitachi turbo use that with your turbine housing if it's the larger one .

A .

[hypergear]

The 310rwkws run above was from our standard R33 21U high flow.

Well, I won't be able to rebuild stock Rb25det turbocharger, because in most of cases it the shaft does snaps off the turbine wheel when I undo the nut.

I can high flow it using a smaller profile If you like stock response and drive ability. They are pretty sweet on stock boost working with factory ecu.

Dark blue is the G1 high flow, while light blue is standard turbocharger:

Based on a R34 GTT with Rb25det Neo motor, with supporting mods and pump 98 fuel:

^^^

It won't make a lot of power tho, I recommend standard profile if supporting mods are planed. The cost to high flow either profiles are the same.

[pipster11]

So you couldn't make a chra that the stock housings would bolt to without needing the housings to be machined? I'm assuming here that machining the housings to suit your chras and new wheels is a bit labour intensive

[hypergear]

Majority of people wants them high flowed so I didn't look into making a drop in core. I mean if you can't take your car off the road I can send you a high flowed OP6 turbo.

[pipster11]

More that I can't justify the supporting mods to make the most of one of your turbos. I will be selling in the next 6 months too so would prefer to fix up the turbo but don't want to outlay too much money as I won't recover it. And would prefer something new rather than swapping an unknown stock turbo onto it.

Over the years I've seen a few Stagea owners searching for a similar option as the car is just a daily driver for them, surely some skyline owners would also like a core that they could throw in and not worry about exploding and run on a stock tune

[hypergear]

For 10psi or under, it works pretty fine with stock ECU. The profile above would be as close to stock configuration as possible. But at moment I don't have a drop in core to replace the factory chra.

Pipster11: Please check your email. I've forward you with a special offer on an high flow service. Cheers.

[hypergear]

Results sent in from another customer. This is an ATR28G2 on an S15 with tomei drop in cams making 227rwkws @ 18psi on pump 98 fuel. I think it is an fair number considering the car has been mildly modded to be street legal. Customer is mentioning stronger actuator with more free flow induction, cooler kit and exhaust in near future so hopefully seeing an higher numbers from it soon.

Also noticed the dyno run was using 5th gear?

[hypergear]

Couple of drifting videos. this from our rebuilt GT3582R turbocharger working on Simon's S14 Rb30det motor:

Suspension footage:

[89CAL]

S15's are 6 speed, is 5th the 1:1 ratio gear?

This might be why its done in 5th

[hypergear]

Cool, Working on an ball bearing version of TD06x based turbochargers at moment. Pretty challenging so far as the bearing housing is very short and cast without much materials in it. lol. I will up load photos once completed.

[Dose Pipe Sutututu]

Update from my build:

Installed used 1200cc Five O injectors - one failed and proceeded in flooding motor with fuel. Great fun!