Jump to content
SAU Community

Recommended Posts

Thought it would be useful to share my turbo upgrade as i know many people are looking for a reasonable budget turbo upgrade.

After searching the forums constantly i noticed the gt3076r was probably going to be the best option for me. The hks range was just to expensive and the high flows dont offer enough power.

Thankfully people like Cubes, Lithium, Al and The Mafia had posted up there results and problems so most of their issues were avoided.

List of mods before upgrade

eboost 2

pod

3"turbo back exhaust

fmic

pfc

mods purchased for upgrade

bosch 044

sard 850cc injectors

gt3076r 0.82 housing, with larger waste gate flapper & hole. (made by mtq WA)

Oil & water lines (supplied by mtq)

z32 afm

custom required piping done by hyperdrive ie dump, cooler piping etc

i think that is all

I have attached two different dynos. One was from December last year where you can see there was an issue with lag (this was caused by a faulty 7psi actuator). Unfortunately as the workshop closed the next day i had to drive it around for the next month as they only just re opened for tuning. I was stuck wondering whether this was just the way the car was going to be as many workshop said it was normal, (bullshit).

After speaking to cubes, lithium and discopatoe and showing them the dyno they all agreed it wasnt normal and to look at putting a larger psi actuator on there as they had experienced similar issue with lower rated actuator, thansk for the help much appreciated. Cheers to dangerman too. The Mafia :) for not bothering to respond to any of my query's.

So yesterday i had them put on a 18psi garrett acuator and problem solved, full boost by 3900 rpm. Note i have stock manifold, stock cams and it is rb25. The car was getting one ping of 80 so the tuner took out heaps of timing and managed to get it safe. Never goes over 10 knock on the road. As you can see 271.8rwkw is not huge but it was the power i was chasing as the engine is stock and i need it to be realiable. Also you can see the dip in power from 6500rpm onwards probably due to over heating because of faster boost. It had also done about 10 power runs so it was pretty hot. This was done on a W.A dyno so there MAYBE a lower figure compared to the eastern states. I am sure a set of cams, maybe a new manifold and i could see higher figures but at this stage i am happy with where it is an achieved my desired result.

The turbo sounds awesome just like a jet.

Must say cheers to hyperdrive also for putting up with my constant phone calls. Andrew your a champ.

msg_a198025_.pdf

SKMBT_C25209012111010.pdf

SKMBT_C25209012111011.pdf

SKMBT_C25209012111020.pdf

Link to comment
https://www.sau.com.au/forums/topic/253520-my-gt3076r-upgrade/
Share on other sites

Yeah def plan on taking to drags, i never done a 1/4 mile before so wont be predicting my times.

Don't worry about the times , just go to have fun. You will get better with practice like anything but, so much fun.

It's great to really drive your car to it's full accelleration potential legally and against your mates too.

I might get down just to shake off some cobwebs in the bunky GTR sometime soon myself.

thought i would mention we used a split dump to and no boost creep. Forgot what type it was but it was purchased from the eastern states and it was very similar to the hks one.

Edited by Pattygtst

Results look good - you should be happy and I bet it drives great. Peak figure is in the right area for the spec, and you'd probably agree it gives nice progressive delivery.

One thing I might suggest if you have the facilities and time, is to play around with timing under 4000rpm and see if you can fill out the curve in that area - you will feel the difference. By comparison I found mine made these outputs @ revs:

2800 - 100hp

3400 - 150hp

4000 - 265hp

4600 - 340hp

Can't scan anything up at the moment, but main idea is that you probably have some untapped reserves down lower if prepared to play with the tune.

Keep us posted with results of any more tuning and/or efforts on the track.

nice power runs mate... ill be installing a 3076r EW 0.63rear in the next month or so, got the 550cc sards ready to go in as well, hoping to get around the same figure as my tuner said for a safe tune between 270 and 280rwkw with stock internals..

just wondering how much the installation cost you? including piping, tune etc?

nice man, this is the same setup i will be putting onto my rb25 but i will run a external gate on a 6boost manifold, probably smaller injectors than what your using, and just some poncams 256 deg, i was only planing on running about 17psi for a daily, looks like i will probably get some good numbers,

gw

JV

Results look good - you should be happy and I bet it drives great. Peak figure is in the right area for the spec, and you'd probably agree it gives nice progressive delivery.

One thing I might suggest if you have the facilities and time, is to play around with timing under 4000rpm and see if you can fill out the curve in that area - you will feel the difference. By comparison I found mine made these outputs @ revs:

2800 - 100hp

3400 - 150hp

4000 - 265hp

4600 - 340hp

Can't scan anything up at the moment, but main idea is that you probably have some untapped reserves down lower if prepared to play with the tune.

Keep us posted with results of any more tuning and/or efforts on the track.

Hmm yeah definately something to look into. I might have a retune a little later. I did save a few dyno print outs of other users with the same turbo so i will have a look and compare.

cheers

nice power runs mate... ill be installing a 3076r EW 0.63rear in the next month or so, got the 550cc sards ready to go in as well, hoping to get around the same figure as my tuner said for a safe tune between 270 and 280rwkw with stock internals..

just wondering how much the installation cost you? including piping, tune etc?

nice man, this is the same setup i will be putting onto my rb25 but i will run a external gate on a 6boost manifold, probably smaller injectors than what your using, and just some poncams 256 deg, i was only planing on running about 17psi for a daily, looks like i will probably get some good numbers,

gw

JV

Hey guys i have a GT3076R EW with 0.63 turbine hsg,Trial 38mm gate on a cheap monsta performance s/steel hi mt manifold and 256/264 hks cams. I made 260rwkw @ about 13psi. It is mainly used on the track these days hence the ultra safe tune, but if i had my time again i would definitely go the 6boost manifold HPC coated and a 0.86 turbine hsg to get a bit more torque and stop chocking up the engine over 6400 rpm.

Ryan

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Maf is a question mark but TPS  I have set at 0.47, the fact that I’m getting proper voltage range out of it with the key on leads me to believe it’s functioning properly. I’m getting proper voltages on basically everything. I still need to look up voltage ranges for z32 maf and test that 
    • Honestly no not at all, but it’s a very basic tune, it’s stock injectors q45 tps and z32 maf. Other than that it’s a completely stock base map. The file is from nistune and from my understanding if it was tune related I would be able to unplug maf and tps and it would still start even if it was a really shitty start. I have tried starting it with coolant temp, maf, and tps unplugged none of those 3 togethor or individually changes anything 
    • 🏆 Skyline Supremacy Meets Mount Panorama Magic 🏆 Join SAU NSW as we take the long way to Bathurst, the home of GTR greatness. Saturday 30th August 2025 7:00AM Meeting Hanna Park North Richmond 7:30AM Departure Cruise Via Bells of Line Road 9:00AM Arrival to Stop 1: Golden Poplars Meadow Flat 9:45AM Arrival to Final Destination: Mount Panorama Motor Racing Circuit Meet Location: Hanna Park North Richmond Stop 1: Golden Poplars Meadow Flat Final Destination: Mount Panorama Motor Racing Circuit   *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
    • What does it look like with highway driving? And yes, I had a similar thought as Duncan. It looks quite similar in my Stagea and I have made myself accept it as normal. Might have to look into it some day   Highway gets as low as 10l/100km on my end so I'm not as worried about it being a mechanical issue. More likely just the tune on the haltech.
    • While I was waiting for the new parts to come in for the charge pipe and radiator I decided to do some turbo modification. The drive pressure (exhaust backpressure) was a lot higher that I thought it should be. For 32lbs of boost drive was 55lbs. The turbine housing is a 1.10AR and my turbo builder has suggested to go to a 1.25AR. To test if a larger AR would do anything to reduce drive pressure AND not spend any money I decided to hog out the divider in my current housing. I removed it from the inlet and the whole way through the housing.  After reassembly and testing it doesn't look like this modification did anything for reducing drive pressure or requiring more fuel (making more power). Oh well, it was worth a shot. We'll get some data at the track if it makes it past the 60ft. I also machined a $7 shift knob off Amazon to fit my Stillway shifter since I didn't like the Stillway shift knob. Next on the list was the radiator replacement and fabrication of a new intercooler tube that had no silicon coupler. No pictures of this - I was short on time each night after work to get this done and didn't stop to take pictures.  Next was to get the clutch disks out and replaced. Previously when installing the dogbox I had ordered a set of the same sintered iron disks I had been running because I switched to the 26-spline input shaft. I thought it was odd that they didn't have any markings or brand name on them like all my old disks had but installed them anyway. At the track I could not get the clutch to lock up using my normal strategies. After two track nights I reached out to the clutch manufacturer and ask their thoughts. They said they had to switch the material out because they were having trouble getting the original material and that this new material would not take to being slipped very well.  So out with the first set of 26-spline disks and in with the correct material 26-spline disks. While I had the trans out I added an inspection/service hole. I've wanted one of these for a while. Now I can have a look at things and change the front cover shimming when needed (clutch wear). I hustled and got the clutch change done in a few hours on a Saturday. Hopped in the car and drove home. On the way home I did a 1-3 pull. When shifting from 2nd to 3rd the core plug in the back of the cylinder head popped out and dumped all the coolant. Thankfully I was only 30 seconds from home and coasted it there. Datalog showed nothing unusual and 2.5psi of coolant pressure. That plug has been in there since 1992 but I guess it worked its way out. Pulled the trans AGAIN and replaced the plug, JB welded it in, and made a brace. Also deleted the head drain I had added in during the bearing issue fiasco.  I am currently changing my boost control plumbing to make it cleaner. After that is done I'll make another attempt at getting past the 60.
×
×
  • Create New...