$2000 In Hand Gcg/hypergear Or Other?

[lilcrash]

i want real world experience and want a recommendation on where i should go to get a replacement turbo or get a rebuild. not after mass horse power but here is my current supporting mods

3inch hks exhaust

jjr dump pipe

splitfires

jjr stealth intercooler kit

k&n panel filter

turbosmart type 3 bov (i dont think that matters but yer)

im planning on running 1 bar with a nistune

so its up to everyone on here where should i go.

[KiwiRS4T]

How long are you planning to keep the car? How fast do you want to go?

If you are paying for the removal and replacement of the turbo then a hypergear rebuild will be within your budget and should deliver up to 220awkw with the stock injectors and afm. I have no personal experience with Hypergear but their reputation is growing.

If you are going to remove and replace it yourself you can afford a GCG rebuild - same power output with your current set up but with ball bearing centre. I have had one of these and it took me to 245awkw with bigger injectors and afm. Straight replacement with no installation problems.

If you are going to keep the car forever and want big power down the track get a GT3076. It can be tuned for up to 220awkw with what you have now and has potential for 300kw. But you will need another grand to make it happen.

There are a number of other new turbos or turbo rebuilders that members might recommend. Then there are the cheap Chinese copies which in my view are too much of a lottery!

[lilcrash]

1 - probably a while i love the car

2 - my wife or myself will be doing the removal and install

3 - really only want to run 1 bar and what ever power that makes will be fine but sounds like you have got it worked out pretty well how many psi were you running when you made 245 awkw, what size injectors, z32 afm??. what have you currently got on your car?

[zebra]

Go GCG there are a better turbo, Ball bearing core etc and Proven to give bullet proof results,

That being said there is nothing wrong with the Hypergear turbos, but if you have the budget I'd be going GCG.

[kwickr33]

By comparing results Hypergear's standard high flow is more responsive mid range while GCG's made 6kws more uptop.

Both of them can perform highflows with Garrett BB cores while Hypergear also makes .82 OEM patented housings with large can actuator as a part of their PU high flow series. If you are going for more HP down the track its probably worth checking that out which I have seem 295rwkws on 20psi with stock RB25det.

I would be speaking to both of them and see what they can offer to suit your budget.

Edited June 25, 2010 by kwickr33

[zebra]

I think that if you were going to chase 300rwkw than Id just go straight to a 3037/3076, will make that power much easier.

[kwickr33]

Originally thought of that. It suprised me how Hypergear's managed to do that with better response using a sleeve bearing core.

Edited June 25, 2010 by kwickr33

[iamhe77]

Originally thought of that. It suprised me how Hypergear's managed to do that with better response using a sleeve bearing core.

Stao (Hypergear) also do ball bearing cores.

[KiwiRS4T]

1 - probably a while i love the car

2 - my wife or myself will be doing the removal and install

3 - really only want to run 1 bar and what ever power that makes will be fine but sounds like you have got it worked out pretty well how many psi were you running when you made 245 awkw, what size injectors, z32 afm??. what have you currently got on your car?

Made that power with the GCG turbo at 1 bar with 550 injectors and a Z32 afm. Forgot to see if you have replaced your fuel pump but if not you need a Walbro or Bosch 044 in tank preferably wired for full battery voltage. That should give you 210 -220 without the new injectors/afm. BTW GCG offer a (small) discount to SAU members if you think to ask for it.

Currently I have all the stuff in my sig at the bottom of the post but waiting for my Rb30 to be built. (Currently driving a $500 Diamante)! Hopefully can report back in 2 or 3 weeks.

[Tangles]

gt3076r-iw dual ball bearing turbo + 18psi actuator, z32 afm + fuel cut defender, Splitfire coilpacks, bosch 040, nismo fpr, S15 450cc injectors (series 1 stagea), fmic & apexi pod, jjr bellmouth dump pipe, 3" exhaust,

Toshi ecu remap chip + AEM fic/8 piggy~back (like greddy ultimate), MV Automatic shift kit, 249rwkw @ 16psi / 1.1bar front driveshaft pulled for rwd dyno. Will make at least 10% more with an updated remap to the ecu chip & larger injectors

Its a highflow made by Bill keen at Adelaide Turbo Services, around $2500 for the full kit including lines - thats a garrett bb 3076 core, flowed front nissan housing, rear .73 a/r AVOturboworld skyline exhaust housing

[Race__24]

If the $2000 includes Nistune and tuning, you only really have one option - Hypergear. It will leave you with some extra so spend it on a good boost controller/boost gauge and oil pressure gauge

[lilcrash]

The $2000 is just for the turbo. Nistune is after I get it all fixed

the one question I haven't looked into. Is the stock turbo ball bearing?

[R31Nismoid]

OP6 GCG or

R33 rear GCG?

The OP6 will do around 260-270rwkw on 18-20psi

So if you only want to run 1bar it'll feel a tad lazy, but will be nice either way. Ensure you get a bigger actuator with it as the factory one will be no good

By comparing results Hypergear's standard high flow is more responsive mid range while GCG's made 6kws more uptop.

Both of them can perform highflows with Garrett BB cores while Hypergear also makes .82 OEM patented housings with large can actuator as a part of their PU high flow series. If you are going for more HP down the track its probably worth checking that out which I have seem 295rwkws on 20psi with stock RB25det.

I would be speaking to both of them and see what they can offer to suit your budget.

You wanna split hairs over 6kw?

Mate that is dyno variance between two power pulls with the same car... Let alone different time/place/conditions.

Hypergears are not OEM (Nissan) .82 rears unless i am mistaken (totally ope to be corrected there). They are newly supplied housings. Nissan never offered a .82 rear.

Side point - You cannot machine a factory housing out to .82 A/R size anyway.

There are other dynamics to take into account when machining out turbine housings to within a whisker as it's not just the outlet that then needs machining.

The entire intake port needs milling and so on as this is where the bottleneck is in a turbine housing anyway, which overall weakens the housing if you take too much meat off.

Weak/thin housing & 650-800 degrees = cracks over time.

GCG's items are around the $1750 marker, a ball bearing from Hypergear would be close to the same price as well. Just remember to account for the better actuator as well

Journal/Bush bearings are obviously cheaper and probably around the $900-$1100 marker IIRC.

[KiwiRS4T]

The $2000 is just for the turbo. Nistune is after I get it all fixed

the one question I haven't looked into. Is the stock turbo ball bearing?

Stock turbo is ball bearing. They can be rebuilt with ball bearing or journal (bush) bearings.

[Appealing]

I am just having a standard hi-flow garret core (plain bearings), and OP6 housing fitted to my replacement engine. Nistune and a good (4-5 hour) tune on a 4WD hub dyno. Should be done by this time next week. I'll let you know how it goes. Should be good for 200 AWkw, which'll do me. Mine std was 168kw (at wheels). everything else is staying standard. Already has a 3" system though. There are two trains of thought on the ball bearing centres. At 40,000 rpm + the oil alone is enough to keep the shaft spinning freely. Also Very high revs can cause ball bearings to drag and lead to failure. Talk to you Turbo rebuilder......

[lilcrash]

my views are that if it was ball bearing stock its going to stay ball bearing, so looks like gcg is the go. will everyone agree that a gcg highflow with a 1 bar actuator, bosch 040 hard wired and a nistune be sufficient to keep the car reliable?

[R31Nismoid]

^ it would be very reliable.

Although do not hard wire the pump, in an accident it will keep pumping - bad.

Just RE-wire it using a relay etc so it'll shut off.

Also some injectors

[wolverine]

x2 this sort of combination is one of the most used (on SAU) and reliable combinations. It should take you to a happy place.

I would give it more of a nudge than 14psi as there is little harm to be done while they are tuning the car. You control the level of boost with your right foot anyway on a day to day basis so why not map it a little higher while you are at it.

Turn up the boost until it stops making easy power and leave it there, something a competent tuner will do anyway.

[lilcrash]

The relay approach is what I meant but yer deffinately not going to hook it straight to the battery. That is a good point I may aswell just take it to whatever it makes rather then hold it back. Now just to organize the parts. . Thanks everyone

[kwickr33]

If you've got 2G to spend on a turbo its probably worth getting the new .82 turbine housing with OEM bolt pattern running a Garrett GT3076R core and .60 comp housing. Very similar response as the GCG high flow but lot more mid rang and top end power, Plus the cost is almost the same.