Hypergear Turbochargers and High flow Services Development thread

[hypergear]

Dyno tune for that is booked in on the 6th of Jan. So results will be published then.

[E-HCR32]

Hello Mr Tao SG,

I have a automatic RB20DET skyline and need to have my turbo charger high flowed, could you please PM a quote.

Would like an SS1 billet compressor, is this possible in stock housing? and how would it affect spool and top end output compared to the standard high-flow?

Thanks Graham.

[E-HCR32]

Thanks Stao, I will send you my turbo after Christmas.

Kind Regards Graham.

[hypergear]

First result with the S14 test car. Using my new ATR28SS1 turbocharger internally gated as a bolton unit.

Using pump 98 fuel it maxed at 258rwkws @ 20psi:

Far as I know this car has Stage 2 BC cams, and the VCT controlling unit has been taken out, as those cams probably don't have VCT support. It is a shame as it would have made a very big difference in response.

This is the interesting part. Vs the GT3071 in .64 Rear. The SS1 has better response, made more power, with more torque:

This result would be for a rough reference. I can not conclude that this result can be archived using other SR20dets unless the modifications done are identical to mine. There are too many variances with SR20det builds, which can affect engine output significantly.

[GTScotT]

That's interesting Stao, I believe my SS1PU SR has a better power curve than your SS1. I think Unigroup has a fairly harsh dyno and I am making 240kw, and we both do not have VCT.

I wonder how you will find my older version SS1PU against the current SS1 on your car. Are you going to do back to back?

[hy_rpm]

Your ss1 did do alil better than the t2 cropped gt3071r but just 200rpm better spool and 1kw more peak and 5-10kw more midrange

Would have a bucket more low and midrange if you went .64 500rpm better spool but hopefully wouldn't hurt peak power too much should try it or I'll try the .64 with my ss1.5 but did well against a larger turbo

If you we're to replace it with a std cast iron manifold and replace the intake cam gear to VCt unit that will alone better response by at least 500rpm and already make midrange and low power a lot Better

If I was in melb I would have changed them over for free for you to test

Also bc s2 cams work with VCt cam gear a lot of people have used them just they wear out and get noisy quicker due to the stiffer valve spring on std you may get 10years but with this you may get 5years or less but still work

Only step 3 cams can't use VCt that's why a lot of people use s2 intake and s3 exhaust cams so basically it's performing now like a older non VCt sr20det would

[hypergear]

The turbocharger on it was an proper GT3071 as what some members are using in a R33 skyline. Except a Garrett .64 T2x turbine housing was machined to suit it.

The ATR28SS in only with a 64mm compressor, except the blade radius is lot more then whats the Garrett 71mm compressor wheel has, so the total inlet area between the two wheels probably works out quite similar.

Comparing the result:

3500RPM: 65kws v 80kws,

4000RPM: 120kws V 170kws,

41000RPM: 125kws V 180kws

Similar to boost level:

3500RPM: 6psi v 8.5psi

4000RPM: 12.9psi v 18psi

4100RPM: 21psi V 15psi

It is very different to drive.

GTScott: The SS1PU is a larger turbocharger with 73mm compressor. I had a feeling that this turbocharger is abit too big on the compressor end, so the 68mm compressor was developed to match this turbine flow.

How ever the theory in designing turbocharger for SR is allowing better exhaust side flow, which is also the reason I really liked to see what a small turbocharger could do on a SR with a large turbine and a huge internal gate. I think the RB25det version of the SS1PU in .86 turbine should be able to crack some where around the 280rwkws mark on my S14.

hy_rpm: I'm quite a SR noob, please advises of what I need to buy that enables VCT function, and I will be trail few of the other things that I've suggested. Thanks in advance.

Adaptronic S14 Plug in ecu is going in for next tune, which I've been told is more tuneable with few extra features. For details I will speak to Trent about it after the 9th.

[hy_rpm]

You will just need to replace the intake cam gear with a factory gear with VCt

Just make sure it's indeed have a VCt inlet cam it should have a small hole on the end for oil to activate the gear

Or just search it's part no stamped on it

The wiring and solenoid should be still there and your adaptronic plug in ecu should control it

Your injectors will be on its limits now as I know 555cc usually max around 240rwkw so your 660cc will be close at 260rwkw on pump

[hy_rpm]

No it's not a real t3 gt3071r with the full size 60mm turbine wheel will crack 300rwkw on a sr

On nissansilvia there's a guy making

347rwkw on a gtx3071r twinscroll on just under 30psi e85 20psi by 3600rpm on VCt sr

Another

Make and model: s15 sr20det unopened engine in s13

Size of engine: 2.0L

Modifications to the car: supporting mods nismo 740's, z32 afm, greddy valve springs, copy sump, jjr exhaust manifold modded to suit 44mm tial, 3 inch exhaust, trust 400x300x100 tube and fin intercooler, 40mm china radiator, trust oil cooler, splitfires, old blitz dsbc, bosch 044 and surge tank, s15 pfc.

Type of turbo: 3071

Trim of turbo: 56T 71mm compressor .5ar housing, 84T 60mm GT30 turbine .63 housing

Rear Exhaust housing: .63 non gated

When does vehicle begin boost: dunno

When does vehicle reach full boost and what PSI: 20psi@3600

Does the vehicle have Cams? if so; yep

What brand: Unigroup spec camtechs,

What lift/duration etc: 255 11.5 in 260 12.0 ex

Max power achieve at what boost: 285rwkw@21psi on ultimate

[hypergear]

No this is a full 60mm 10 blade GT30 turbine wheel. Not the 56mm cropped 9 blade version you have in mind. That was the first thing I looked at when I pulled this turbocharger out. And that was all it could do on this S14, which as I've mentioned about the variances between SRs . I will use its power curve as a base line to compare with.

[hy_rpm]

Well that turbo was not performing as it should

As with the cropped version 56.6mm turbine my brothers had in his car made 250rwkw on a non VCt 180sx full boost by 4200rpm 21psi

So i would say if you change the inlet cam gear to fix the timing you would have a totally different result as even gtscotts ss1pu is more responsive than your ss1 which is a larger turbo

So I would say it's either the cams or cam timing in the gear not set right but the VCt gear should fix this and you should get a better result from the ss1

also those 650cc injectors but your tuner would tell you if there maxxed

Edited December 20, 2013 by hy_rpm

[89CAL]

Pretty happy so far with the SS2. Only running around on a base tune till my tuner gets back from overseas but it seems to be a very nice package to drive around on already. Feels a bit torquier down low then it used to. Turbo sounds pretty cool, It's much quieter then my surge sloted HKS turbo which is a good thing. Yet to see what it sounds like at 20+ psi but lol....

Very happy anyway. Will post results when it gets tuned. Bad time of the year to be wanting tuning done etc but lol.

[Dose Pipe Sutututu]

ummmm turbo porn

[Dose Pipe Sutututu]

check this out

http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-MDP-010&Category_Code=BCS

I'm contemplating on getting it, should reduce fabrication work on car!

What do you guys think?

[GTSBoy]

You'd have to be desperate to do that. Those flex sections have nasty convoluted stainless internals that would be absolutely horrible for flow in that location.

[Dose Pipe Sutututu]

The reason why I suggested that is because the vband section connected to the rear housing is pretty long and would require a pretty aggressive angle to fit the dump.

I've e-mailed Stao to see if it is feasible to shorten it, as you can see here it's quite long and as I'm mounting it to the stock manifold the turbo sits close towards the firewall instead of more forward (when compared to aftermarket manifolds).

[scotty nm35]

You'd have to be desperate to do that. Those flex sections have nasty convoluted stainless internals that would be absolutely horrible for flow in that location.

Not all of them, my ones have stainless truck flex inside them instead of the convoluted stainless with braid, they cost twice the price though.

The reason why I suggested that is because the vband section connected to the rear housing is pretty long and would require a pretty aggressive angle to fit the dump.

I've e-mailed Stao to see if it is feasible to shorten it, as you can see here it's quite long and as I'm mounting it to the stock manifold the turbo sits close towards the firewall instead of more forward (when compared to aftermarket manifolds).

I am sure you could shorten the rear pipe, but Vbands are a pain to weld at the best of times. PM me and I will explain how I do mine.

Stao should be selling the dump with them imo, to suit the stock manifold. Not everyone has a good fabricator around the corner... I offered to jig some up for him, but he wanted Chinese sweatshop pricing. Hopefully you can source something that works Johnny.

The turbo came up great, have you test fitted it yet?

[Dose Pipe Sutututu]

Stao should be selling the dump with them imo, to suit the stock manifold. Not everyone has a good fabricator around the corner... I offered to jig some up for him, but he wanted Chinese sweatshop pricing. Hopefully you can source something that works Johnny.

The turbo came up great, have you test fitted it yet?

Hey Scotty!

Thanks for welding up the external gate & the intake pipe for me.. both turned out porno

Not yet, will get cracking on boxing day.. spent the better half of the week doing christmas related shit, installing my bilsteins and a 2-way Nismo diff

Yeah that would be good, supply turbo with v-band dump that bolts onto most Japanese down pipes with the 3x bolt flange... that would be an epic kit...

Also for some unknown reason, I thought the intake was 3" so I bought 2x 3" joiners, turns out it's 4" hahaha... epic fail!

Lucky eBay has some dim sim brand one for $17 delivered (4" to 3" reducer"

[scotty nm35]

The 3 bolt flange is 2.5 inch or 70mm or something. I would run it down to the cat preferably to keep it 3 inch. How can I compete with the JJ cheap arse dumps though? That is the whole reason Stao has that massive adapter welded to the back of his housings, so the JJ dump can be used.

Glad you like it anyway.

[Dose Pipe Sutututu]

Why can't you be in Sydney? I'll just tow my car and leave it at your joint haha.

Those JJR ling long dumps are horrid, I installed one for a mate and we had to beat the shit out of it and grind the fuark out of it so it could fit and to get the bolts through as the bolt heads were hitting the dump.