Hypergear Turbochargers and High flow Services Development thread

[hypergear]

Did a turbo change just making sure that I'm not going to spend money on a new cooler kit for nothing, Now with a ATR43SS-2 on board making no differences to boost drop. New intercooler is getting fitted on the 2nd of April, will update results then.

For now, 276rwkws @15psi with cooler restrictions:

Also ATR28SS-2 powered S13 SR20det with 264/12mm cams. Final result of 299rwkws @ 22psi, P98 fuel:

[XKLABA]

Are you going to change just intercooler then retune ?

Will be interesting to see the difference

[hypergear]

One more piece of Red top SR20det data. This is using 264 inlet and 272 exhaust. Running our SL20.5 Turbo in 8cm turbine. Car made 477rwhp / 356rwkws on 23psi E85 fuel. Graph running against a Apexi rx6 turbo that was previously installed. Dyna dynamics roller dyno, shoot out mode.

[hypergear]

Based on the cooler behavior from earlier test runs. I've made another special application turbo: ATR45-SRFC

This one is made for the minimum amount of boost drop, making some some where towards the 300rwkws mark on pump fuel. It is a bolton turbo just like the ATR43SS/G series. So this will be your recommended turbo if you you've got this type of intercooler installed chasing similar power levels.

Final result of 292rwkws @ 19psi after cooler. Internally gated, P98 fuel.

[jay-rod]

Lol, does SRFC stand for


"Stupid Return Flow Coolers"

If so awesome turbo name hhaha

[Dose Pipe Sutututu]

FYP

Lol, does SRFC stand for


"Shitty Return Flow Coolers"

If so awesome turbo name hhaha

[hypergear]

Another prototype, this one is made for internally gated XR6 BA and FGs. Unlike the GTX3582, this turbocharger is also fitted with a much larger exhaust wheel working with a big 40mm internal gate. The approximated HP out put on this turbocharger is around the 430rwkws internally gated on pump 98 fuel. Releasing few evaluation units at special prices, PM if any one is interested to trail.

[XKLABA]

I know very little about the pyhsical size specs of turbos but is it possible to fit a GT30 turbine to a GT28 core, im wondering if that would be possible and crop it down to 58x52ish then stick a GTX67 comp wheel on it to make your own 5867 that will take machined -5 GTR housings for that factory fit ?

Or can the -5 housings bolt onto a GTX3067R agian with the cropped turbine ?

[hypergear]

Yes that is possible. Best supply the raw casting for this application, as other wise it needs to be sleeved before machining.

[XKLABA]

Thanks, Back to the drawing board

Oh you changed it, so would this be worth doing for a responsive 500kw at all 4

I have 458kw now with HKS GT-RSs

Backpressure is killing me at 28psi at the moment and im thinking it is cause of the size difference of the wheels as well as the size of the 53mm T28 turbine wheel being a bit to small

[Piggaz]

Surly a 63 mm wheel would be ebough for 500 kw on the correct setup?

[hypergear]

Thanks, Back to the drawing board

Oh you changed it, so would this be worth doing for a responsive 500kw at all 4

I have 458kw now with HKS GT-RSs

Backpressure is killing me at 28psi at the moment and im thinking it is cause of the size difference of the wheels as well as the size of the 53mm T28 turbine wheel being a bit to small

You can use your existing compressor wheel and run with our ATR28SS-2 turbine wheels in your current turbine housings. That will drop back pressure, cooler EGT, and makes more torque.

[Mick_o]

Thanks, Back to the drawing board

Oh you changed it, so would this be worth doing for a responsive 500kw at all 4

I have 458kw now with HKS GT-RSs

Backpressure is killing me at 28psi at the moment and im thinking it is cause of the size difference of the wheels as well as the size of the 53mm T28 turbine wheel being a bit to small

Yep sounds like you need 1 good turbo instead Micky!

[Torques]

Based on the cooler behavior from earlier test runs. I've made another special application turbo: ATR45-SRFC

This one is made for the minimum amount of boost drop, making some some where towards the 300rwkws mark on pump fuel. It is a bolton turbo just like the ATR43SS/G series. So this will be your recommended turbo if you you've got this type of intercooler installed chasing similar power levels.

Final result of 292rwkws @ 19psi after cooler. Internally gated, P98 fuel.

When making pressure measurements you have to take the air temperature into consideration.

The air before the FMIC is much warmer and hence less dense which attributes to higher volume / pressure.

After the FMIC it's the inverse of the of what I just wrote.

[scotty nm35]

When making pressure measurements you have to take the air temperature into consideration.

The air before the FMIC is much warmer and hence less dense which attributes to higher volume / pressure.

After the FMIC it's the inverse of the of what I just wrote.

I tried explaining that, unfortunately the cooler was blamed for the IAT too which is pretty funny.

I think he realised it was the compressor that was causing the heat, hence the new turbo that was trialled.

[XKLABA]

You can use your existing compressor wheel and run with our ATR28SS-2 turbine wheels in your current turbine housings. That will drop back pressure, cooler EGT, and makes more torque.

Any possiblity of specs for that wheel and i would like to go smaller on comp wheel to help with response, the 71mm i think is a bit big for what my goal is, do you have anything around the 65mm mark that will cover 500kw in twin form

Also i have a pair of -7s here im not using, i believe the exhaust housing is the same as the RSs just need to get .60 comp covers

[Piggaz]

Any possiblity of specs for that wheel and i would like to go smaller on comp wheel to help with response, the 71mm i think is a bit big for what my goal is, do you have anything around the 65mm mark that will cover 500kw in twin form

Also i have a pair of -7s here im not using, i believe the exhaust housing is the same as the RSs just need to get .60 comp covers

http://homepage.ntlworld.com/tbroom/Turbos.htm

According to this the AR's are different between -7 and RS's.

[XKLABA]

The comp side is, .42 v .60 but the exhaust side is both .64 just the RSs have i slightly bigger turbine wheel, which plan to change anyway

[Piggaz]

Ah FFS. Didn't read it properly.

[hypergear]

I have 64mm comp billet wheels, Those are from ATR28SS15. It peeked 281rwkws, and averaging about 275rwkws pump 98 fuel, on my SR. On dyno it is slightly more responsive then a 2871 while made more power.

Orange is ATR28SS15 in .64 rear, Green is GT2871 in .64 rear. Both are S14s with BC Step 2 cams. on pump 98 fuel.

Slight boost control issue on that particular day:

With boost controller fixed: