GCG Hiflow Hybrid on R33 GTS-t

[Bullant47]

May I ask which boost controller you are using?

Hi Cubes, I'm using Power FC addon Boost Controller.

Ian

[Bullant47]

Thats an awsome results dude, can tell how happy you would be

Yes jazza08, I've had the GCG Hiflow for 12 months and was always around the 220-240kw@tw. I always wanted to be at 260-280kw because reading different owners threads and comparing mods, I felt that thats where most guys were aiming. Now with the VG30 rear end 270kw is a breeze and i'm extremely happy with that for a few hundred bucks outlay. If I had have known about the VG30 rear end 12 months ago I would have bought that straight away.

Ian

[Bullant47]

Very good.  Have you got a pic of the turbo before you put it on.  I'm interested to see the physical size of the exhaust housing.

This fits with my theory that an R34 turbo highflowed should make more than an R33 one done the same way.  Compressor sides are the same all round but bigger exhaust housing picks up serious gains.

Hi Bob, I'll try and download the pics now mate

[Bullant47]

Hi Bob, I'll try and download the pics now mate

Opps, these files are too large, I'll have to try and compress the pictures.

[FATGTS-R]

Nice result indeed. Can I ask if boost pressure remained the same from before and after the new housing?

[Cubes]

the 240 was 18psi dropping to 14psi and the 271 was 19 dropping to 17psi

[Steve]

Where does boost start coming in? Did they flow the turbine housing? On my stock 33, boost was comining in around 2500rpm with a vg30 - seems like yours is a bit on the laggy side for that sort of power?

[Cubes]

You ran a VG30 Steve?

I had a VG30 BB on a RB20DET, ~4100rpm for 12psi vs the rb20det turbo making ~12psi at 3000rpm.

[Al]

So the comp. cover is still the std. rb25det turbo?

Also, having trouble understanding that dyno graph :Oops: . How could a turbo with a bigger exhaust cover be making more power throughout the whole range? I would have thought the std hiflow would have been making more power a little earlier (@ low rpm), than the VG30 hiflow combo.

[Steve]

Yes I did, when I stocked out my R33 for sale. The rb20 isnt the best for early boost, not that you have to worry now.

[Bullant47]

Hi guys, I had a dissapointing day yesterday at Oran Park. I retired the car after only 9 laps. The car was unbelievable. Heaps of power everywhere, more than i was used to and it was the first time I have "booted" the thing since it was installed. I have never raced on the OP short circuit before and I needed more time to work it out. I was getting faster and faster the more familiar i was becoming with the newfound power and the track. Seriously, the boost comes on much much stronger than the normal GCG Hiflow. I ran a best time of 50.68.00. I honestly believe given a few more laps i could have gotten down to 48's. Even the 50.68 sec lap I was sidways comming onto the straight and I would have lost time correcting it.Biggest lesson I learnt is to ALWAYS reinstall the manifold heat shield and the turbo heat shield. I ran without and melted some plumbing. Not melted right through but rubber blistering nearest the stock manifold and even a silicon joiner melting where it was in contact with a SS clamp. DUMB MISTAKE. I'm going to replace some pipes with silicon and reinstall the heat shields.

Ian

[someonestolecc]

That's some nice power. One day I'll have to try one of these so called "RB" engines

Please let us know when you're used to the power and re-installed the heat shields - I'll be keen to see this thread come 'full circle'

[Cubes]

I would say you are lucky..

Roy wasn't so.. Apparently glycol (in the heater hoses just behind the turbo) when sprayed in a fine mist is extremely flamable.

[Roy]

H E AT S H I E L D S A R E R E A L L Y G O O D

I burnt/split the heater hose on the firewall, so the glycol sprayed over the hot turbo and flashed off. There was far more smoke then fire, but by the time i stripped/cleaned the car to observe the damage it was clear that there had been a lot of heat and enough of a fire to warrant a new loom.

[Bullant47]

I never thought of that issue before. I guess that is why Nissan designed them in the first place. You never stop learning when you start racing. I stuck my hand in down by that area after 3 laps and jessusss it was hot. It's a neverending story, need to get the lip on the rear guards rolled to as the tyres are just touching, more money.

Ian

[Roy]

More money ...thats why im callin git quits for a year or two. Concentrate on work and getting some money behind me and enjoy some travel. Fingers crossed i might pick up a Sierra while working / travelling:)

Its amazxign once you start racing a car, i realised two thing, how good a job Nissan did, and secondly how so many aftermarket parts only solve half the problem:(

[Bullant47]

More money ...thats why im callin git quits for a year or two.  Concentrate on work and getting some money behind me and enjoy some travel.  Fingers crossed i might pick up a Sierra while working / travelling:)

Its amazxign once you start racing a car, i realised two thing, how good a job Nissan did, and secondly how so many aftermarket parts only solve half the problem:(

I've said it before...The Skyline...We rock up to anywhere, 3 people in the car, 4 wheels and tyres in the car, 20litre drum of fuel with Toluene mixed, tool box and pump and god knows. Having driven for 4 hours to get there, the car is absolutely loaded to the gunnels. Air Conditioner going Stereo going change the tyres when were there. Opposition turn up with car on trailer, gutted with engines and stuff from all sorts of different origin, and there are only a few cars that are quicker on the track. We always finish in the top 10 overall and I just think that says something for Nissan.....and the Skyline.

Ian

[Duncan]

Brilliant work again Ian, 50 is a great time in a gtst and as you said there would be more in it with some more familiarity

[Roy]

GTSTS rule NSW:wave:

[Bass Junky]

Okay so back on topic.

Hows the car at low revs know? Making any less power?

Do you have a graph from like 2000 rpm upwards?

Can you retain the existing dump pipe?

Dying to find one.

BASS OUT