Hypergear Turbochargers and High flow Services Development thread

[RS500]

Hi Tao and all.

just wondering which turbo (or CHRA) you would recommend for a 2L 4-cylinder engine with short stroke & big bore (unlike the SR20DET) for a responsive upto 300rwkw?

I have read the 581 pages (wow what a read) and given the atr28ss2 would give me what i need, would like to know how the ATR28 & ATR43 differ and which one can ideally be suited to my T3 flange.

[RS500]

Hi Tao and all.

just wondering which turbo (or CHRA) you would recommend for a 2L 4-cylinder engine with short stroke & big bore (unlike the SR20DET) for a responsive upto 300rwkw?

I have read the 581 pages (wow what a read) and given the atr28ss2 would give me what i need, would like to know how the ATR28 & ATR43 differ and which one can ideally be suited to my T3 flange.

anyone?

given my manifold has T3 flange it seems i'll need to go for a ATR43 based CHRA. Just not sure how it will perform on my engine.

does anyone know the difference b/w the ATR28 & ATR43 turbine ends?

[Dose Pipe Sutututu]

Give Tao a call or e-mail him directly..he's pretty good at replying, just at weird hours when he's not on the tools.

[hypergear]

You can use our Atr43g3sat model in ceramic ball bearing assembly externally gated

[RS500]

You can use our Atr43g3sat model in ceramic ball bearing assembly externally gated

thanks Tao.

any guesses when i'll roughly see fullboost?

alos, what would be the next smaller CHRA i could use?

[RS500]

thanks Tao.

any guesses when i'll roughly see fullboost?

alos, what would be the next smaller CHRA i could use?

Also, would it work ok with an A/R .63 turbine housing?

[hy_rpm]

Atr43g3sat would be laggy on sr20 its already quite laggy on a rb25

One size down would be the atr43ss2

No ones tryed it on a sr20 yet

Would be quite good on a t3 highmount manifold and cbb

.63 rear externally gated

Would be quite responsive but may choke the engine over 300kw

On e85 might be ok but pump 98 may get detonation early

Depends what you want the car for

Responsive street setup .63ar or all out power drag .82ar just may be more lag

[jet_r31]

.63 t3 housings make heaps on 4 cylinders(350+),much more than the little

t2 housings ever will

You havnt got no where near as much backpressure as a rb25.

You could try the 20.5g he builds. Ss2 comp.l2 turbine 8cm housing.

We have one on stock bottom end sr. Does 315rwkw atm on low 20s boost and e85.

We used a china cast mani which had no boost control.

Now gone 6boost and 45mm gate,trying to get it booked in for tuneatm and will be put "on kill" shortly....

Another guy in qld did 370rwkw on one on 27psi ish with a bit left in the tank so be interesting to see what it makes.

We fitted a small water injection nozzle pre turbo this time aswell

Have a atr45sat ss here aswell ..have joked about fitting that..lol

Cheers

Darren

[hypergear]

Atr43g3sat is the latest model that is more responsive then the ss2.

Thats the one made 317rwkws with 20psi @ 3550rpm P98 fuel. I think the larger model referred to was the Atr45sat.

Not a Sr, for a short stroke 2L depending on CPR, can run in a .63 or .58 rear.

[RS500]

Atr43g3sat would be laggy on sr20 its already quite laggy on a rb25

One size down would be the atr43ss2

No ones tryed it on a sr20 yet

Would be quite good on a t3 highmount manifold and cbb

.63 rear externally gated

Would be quite responsive but may choke the engine over 300kw

On e85 might be ok but pump 98 may get detonation early

Depends what you want the car for

Responsive street setup .63ar or all out power drag .82ar just may be more lag

thanks for the response.

ultimately the car will be street driven and maybe the odd track day (for some fun) given its heritage.

given this, it will need to stay with the original A/R .63 internal gated housing - i'd also like the engine bay looking factory spec.

and i'll prefer to stay with P98.

[RS500]

.63 t3 housings make heaps on 4 cylinders(350+),much more than the little

t2 housings ever will

You havnt got no where near as much backpressure as a rb25.

You could try the 20.5g he builds. Ss2 comp.l2 turbine 8cm housing.

We have one on stock bottom end sr. Does 315rwkw atm on low 20s boost and e85.

We used a china cast mani which had no boost control.

Now gone 6boost and 45mm gate,trying to get it booked in for tuneatm and will be put "on kill" shortly....

Another guy in qld did 370rwkw on one on 27psi ish with a bit left in the tank so be interesting to see what it makes.

We fitted a small water injection nozzle pre turbo this time aswell

Have a atr45sat ss here aswell ..have joked about fitting that..lol

Cheers

Darren

i'd assume the T3 .63 would flow better than the T28 .64.

the 20.5 (ss2) turbo does look tempting, but per my previous post, i'd prefer to stick with internal gate to keep the factory look.

it seems like i might need to look at the atr43ss2, possibly in CBB.

[RS500]

Atr43g3sat is the latest model that is more responsive then the ss2.

Thats the one made 317rwkws with 20psi @ 3550rpm P98 fuel. I think the larger model referred to was the Atr45sat.

Not a Sr, for a short stroke 2L depending on CPR, can run in a .63 or .58 rear.

so does this ATR43G3SAT have a CBB core?

what size is the turbine wheel because i might look at having my housing machined to suit?

yep, short stroke (over-square) engine with twin cams, forgies, etc, CR will be around 8.0:1.

given it's my weekend street car, response and strong mid-range is important.

it's not a track broad minded person or dyno queen.

[admS15]

so does this ATR43G3SAT have a CBB core?

what size is the turbine wheel because i might look at having my housing machined to suit?

yep, short stroke (over-square) engine with twin cams, forgies, etc, CR will be around 8.0:1.

given it's my weekend street car, response and strong mid-range is important.

it's not a track broad minded person or dyno queen.

What engine exactly are we talking about here? It will help people here to assist you.

[hypergear]

Atr43g3sat in .63 rear internally gated using cbb chra should be fine.

[Cowboy1600]

What engine exactly are we talking about here? It will help people here to assist you.

Not sure why he hasn't actually said engine, but I'm going to guess a YB* series Ford. Given his name, I'd say he owns an RS500.

[RS500]

Atr43g3sat in .63 rear internally gated using cbb chra should be fine.

thanks Tao.

what would the difference be if i didnt go the CBB option?

[RS500]

Not sure why he hasn't actually said engine, but I'm going to guess a YB* series Ford. Given his name, I'd say he owns an RS500.

i didnt think it would really make any difference, but correct, it's a yb cosworth engine.

[Dose Pipe Sutututu]

CBB will give you day and night difference with transient response compared to its journal bearing brother.

I went from a SS2 journal to CBB (ceramic ball bearing) and the difference is day and night.

[hypergear]

2016 version of SS2 has many changes made to earlier models. The difference in end result would be a combination of alterations made.

Ceramic ball bearing system makes difference in throttle response and becomes very apparent when working with low CPR, None VCT engines as well as cars with Auto transmission. It is definitely recommended for that Cosworth engine.

[CEF33Y]

2016 version of SS2 has many changes made to earlier models. The difference in end result would be a combination of alterations made. Ceramic ball bearing system makes difference in throttle response and becomes very apparent when working with low CPR, None VCT engines as well as cars with Auto transmission. It is definitely recommended for that Cosworth engine.

Speaking of Non VCT, low cr engines, did you ever end up doing any development with an RB20 Tao?