Hypergear Turbochargers and High flow Services Development thread

[hypergear]

Add Blah_blah's result. this is from his newly rebuilt RB25det Neo motor working with a large ATR43G4 internally gated bolton turbocharger. It has came a long way of diagnostics and trouble shooting, the end result is:

Car:

R34 GT-T

Hypergear 3582 Tubo

3inch Tbe exhaust

Return flow intercooler

New 460 l/h Walbro fuel pump

Bosch Ev14 ID 1000 injectors

Nistune

Rebuilt engine

Standard fuel rail and regulator

[Manuel Kasko]

Stao whats your thoughts on how much RPM can be picked up with E85?
Colourclassic makes 250rwkw by about 5400rpm so could you expect to make 250rwkw by say around 4900rpm with E85?

[scotty nm35]

E85 is no more responsive than 98 from my experience. It can allow you to run a smaller turbo for more power with better response though, if that's what you mean...

[Manuel Kasko]

Nah I must have been misreading stuff because I thought it would also help with response.

[Dose Pipe Sutututu]

Nah I must have been misreading stuff because I thought it would also help with response.

Maybe you're getting it mixed up with fatter midrange as you can really pump timing into it at max torque compared to 98RON which knocks when you're generous with the timing.

[Manuel Kasko]

That's the one Johnny! haha cheers.
Because I was sure that in the mid RPM I have seen the highflows on E85 make more than 220 - 230kw

[V28VX37]

Add Blah_blah's result. this is from his newly rebuilt RB25det Neo motor working with a large ATR43G4 internally gated bolton turbocharger. It has came a long way of diagnostics and trouble shooting, the end result is:

...

Car:

R34 GT-T

Hypergear 3582 Tubo

3inch Tbe exhaust

Return flow intercooler

New 460 l/h Walbro fuel pump

Bosch Ev14 ID 1000 injectors

Nistune

Rebuilt engine

Standard fuel rail and regulator

382 rwkw, whoa! Well done!!

Do I spot a standard airbox as well? If so, that's unbelievable.

[hypergear]

The lower reading is with air box lid on. I've been told having the lid cause a lose of 3psi of boost.

Been working on my new SR turbo this weekend. Knowing the .64 might be restrictive up top, how ever I still want to keep it for its response, so I've grind down a larger exhaust wheel to suit the T28 bearing housing. Below is still the SS1.5 now running a much larger rear.

I have also bored out the internal gate to 36mm and used an large 38mm internal wastegate.

Its currently installed, response wise feel similar to the original version. How ever in upper top range it no longer feels like hitting a brick wall. I'm hopping to maintain the maximum compressor efficiency with lot less boost, while improve mid top range torque.

[hy_rpm]

Is that the 60mm exhaust wheel as I wanted to try that before but you said it will be too laggy for sr

Will see how you go

[Cowboy1600]

Holy shit, that GTT is going to be handful on the road! What a crazy result.

It puts on about 250kw in around 1500rpm (3500rpm-5000rpm)....wow....

Me rikee

Also, is that loop a pedal or wheelspin?

[hypergear]

I'm pretty sure the car is very good to drive.

With the ATR28SS1.5, The overall diameter of the wheel don't necessarily mean it will be laggy, it depending on how much area is provided and the velocity of air when its expanded.

The diameter of the new turbine is 65mm, which is the largest I can possibly fit into that turbine housing. How ever I've grind down the inducer blade height that maintains air velocity when it entering the inducer blade of the turbine wheel, larger exducer blade area creates greater centripetal force, How ever becomes restrictive at high engine rpms. So I have left extra length creating greater exducing area in combination of a large 38mm internal gate.

In fourth gear its making the same amount of boost per RPM on paper so it should be very close to how the original SS15 turbine performs in terms of response. I'm looking forward to the dyno day.

[hy_rpm]

If it's makes 20kw more than you did before so 290kw and 20psi by 4000rpm

I might have to get you to upgrade mine

When is it booked for tune ?

Also is VCt working now ?

[hypergear]

I smsed cat for a time, still waiting for her reply. Hopefully next week. The VCT gear is so hard to find, I bought a 2nd hand one and its noisy as. Nissan Australian wants $960 each with no stock. I ended up bought one brand new from US for $720 delivered. Funny thing is I originally bought a S14 thought there would be heaps of VCT SRs around because they were Australian delivered, but till now every single SR person came in has either a S13 SR or VCT cancelled SR using cam gears. Since my original results are all based on the way it is, I prefer getting the best possible results I could, before applying VCT and E85.

[GTScotT]

I have a VCT gear with nothing wrong, PM me an offer.

[Cowboy1600]

I'm pretty sure the car is very good to drive.

With the ATR28SS1.5, The overall diameter of the wheel don't necessarily mean it will be laggy, it depending on how much area is provided and the velocity of air when its expanded.

The diameter of the new turbine is 65mm, which is the largest I can possibly fit into that turbine housing. How ever I've grind down the inducer blade height that maintains air velocity when it entering the inducer blade of the turbine wheel, larger exducer blade area creates greater centripetal force, How ever becomes restrictive at high engine rpms. So I have left extra length creating greater exducing area in combination of a large 38mm internal gate.

In fourth gear its making the same amount of boost per RPM on paper so it should be very close to how the original SS15 turbine performs in terms of response. I'm looking forward to the dyno day.

I'm sure it's good to drive but to go from a '90s GTI Swift to GTS HSV in 1500rpm would make for an interesting time on the road. 450nm in 1500rpm, too! I imagine traction is a premium when the foot is to the floor. I'd love to see some footage of it on the road or track

[Missileman]

from 3500 to 4500 looks a little scary

[hypergear]

Similar to my 490rwkws run. When saying fun to drive its more of a "serious fun" at a different level. Its not like smaller turbochargers that runs out of torque at high speed. It pulls like a train over 200km/L in 5th, It feels like the air resistance is tearing every single panel of the car apart, surroundings rushing backwards, a little bit of wind or a tinny bump on the road could send it air born, Not mentioning speed doing 365 degrees turns. If my tyre popes I would be dead .

[Manuel Kasko]

Haha sounds like a lot of fun stao!

[blah_blah]

Holy shit, that GTT is going to be handful on the road! What a crazy result.

It puts on about 250kw in around 1500rpm (3500rpm-5000rpm)....wow....

Me rikee

Also, is that loop a pedal or wheelspin?

382 rwkw, whoa! Well done!!

Do I spot a standard airbox as well? If so, that's unbelievable.

from 3500 to 4500 looks a little scary

Thanks guys!

Didn't know this was posted till Scotty let me know

Its actually not that scary to drive, can't say I have lost traction once the tyres are warm

It made about 350rwkw with the standard airbox in with a dirty filter.

385rwkw was on a safe tune and boost.

Theres about another 20rwkw in the tune and another 6psi of boost once I 'run in' the car of a while

[Kinkstaah]

I found myself comparing your result to 34 GeeTeeTee's result with the FP HTA 3076, and while yours "looks" laggier for the power made (385 vs 391) I was initially disappointed until I realised the 3076 result is running 28-24psi boost vs 22 falling down to 18.

Will be very interesting to see how it operates with more boost wound into it. I'm keen to try mine. Stao please send it to OTR