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Naturally Aspirated / VQ350DE (fuga) couple of questions plenum and mufflers
« Last post by Shaneblyth on December 18, 2018, 07:10:52 PM »
Want some very basic mods.  The 5/16 plenum spacer seems a good one I see on trade me Mace a local firm claim they have a Mace plenum spacer for $170. Don't know this brand any comments on this?  Also want to make a basic exhaust tone/volume change,  its very quiet needs a slight volume/rumble increase.   Just to make it sound  a little nicer.  I assume its like a skyline but showing my ignorance where are the cats on thIs car are they right at the back.  I am not wanting to spend much do just a cheap option maybe leave cats alone?  What do people suggest.
General Performance / Re: Sinco rb26/30 forward facing manifold
« Last post by Looney_Head on November 23, 2018, 08:52:24 AM »
yeah i have one on the car. i had to send my wastegate as they hadn't used my one before.

what turbo are you going for? i have a Borg Warner S360sx
Auckland and North / Re: Nightspeed Drag Wars 2018-2019
« Last post by koschak on November 22, 2018, 10:47:47 AM »
Night Speed Drag Wars second round this friday night
Gates Open at 5.00pm
Racing till late
Burn Outs
General Skyline Discussion / Re: R34 GTT Boost Issues
« Last post by Beached on November 20, 2018, 10:48:49 PM »
The problem doesn't seem to exist unless it's on the dyno and I ended up buying a few more parts so I'll wait till they're on the car until I book my next dyno session.
I've cleaned up all the earthing points and added a couple more so if it was an earthing issue I'm hoping that it's gone.
I also found about 10meters of cable under my carpet that was for an old TV system which was still getting power and the earth was connected to the plastic dash..

I'm almost certain that it isn't a fault in the controller since we tried a different control unit, solenoid and new vacuum lines at different points in the intake manifold.

I've just had a v-band flange welded to my stock manifold and got a 38mm external gate so no room for failure next time! Although I do like having the option to use low boost.
General Performance / Sinco rb26/30 forward facing manifold
« Last post by Karljsw on November 16, 2018, 12:19:39 PM »

Does anyone have a Sinco t4 twinscroll rb26/30 forward facing manifold that they could take some measurements for me?

Wanting to check if an off the shelf item will fit my project rather than having to go full custom.

(I have tried Sinco themselves to no avail)

General Skyline Discussion / Re: R34 GTT Boost Issues
« Last post by Looney_Head on November 12, 2018, 08:34:48 AM »
Hi, Did you get anywhere with this, i would have said it was either a check valve, lines or the boost controller being the issue
General Skyline Discussion / Re: R34 GTT Boost Issues
« Last post by Beached on November 03, 2018, 11:32:58 AM »
My tuner has the same EBC on his GTR and he has confirmed that it is wired correctly. We even replaced all of the silicon hoses with rubber hoses and ran them out of the bonnet and through the window (instead of through the firewall) to avoid crimping.
We tried countless settings on the EBC and nothing would change boost levels. We even tried another Greddy spec II EBC that we knew was working and still had the same problem.
My tuner is leaning towards an earthing issue so when I get some free time I'll go over all my earthing points to make sure they have a solid connection.

Thank you for your reply. Any help is hugely appreciated!
General Skyline Discussion / Re: R34 GTT Boost Issues
« Last post by Looney_Head on November 02, 2018, 08:26:28 AM »
what are your gain and duration set to, do you have pictures of how the lines are routed, and how its wired in?

its been many years since i have played with a profec b but i remember them being a pain to get working properly
Auckland and North / Nightspeed Drag Wars 2018-2019
« Last post by koschak on October 31, 2018, 10:57:49 AM »
Night Speed Drag Wars start up this Friday night 2 November with a Bang

Burn Outs and Massive Fireworks
Gates Open at 5.00pm
Gate Entry $15
Race Entry $30
Racing 6.30pm-late
Race Entry 5.30-8.30pm
General Skyline Discussion / R34 GTT Boost Issues
« Last post by Beached on October 29, 2018, 10:03:14 PM »
OK so early this month I went to get my r34 tuned from a reputable tuner.
The tune was going well until we ran into a problem. We couldn't make anymore boost than what the wastegate actuator was set to (10psi).
We tested out a different EBC and still had the same problem so we thought that the problem was the wastegate actuator.
We tested a boost tap and got 22psi so we ruled out the actuator so we thought it was the boost solenoid valve.

The next day I bought a brand new mac 3 port boost valve and put tested it out on my car. I also raised the preload on my wastegate spring.
Drove down the street and got up to 18psi so I thought the problem was fixed and booked another date for my car at the tuners.
While I waited for my tune I turned my EBC off in hopes that I wouldn't over boost although I was still making upwards of 17PSI even though I was "never" using WOT.

Then I bring my car back to get tuned thinking that the problem had been fixed but on the first run its stuck on 11psi.
We tried changing relevant vac lines with new hoses.
We made sure that the new boost solenoid is operational.
We put pressure onto the internal gate via a compressor to make sure it wasn't flapping open prematurely.
But we couldn't figure it out so I ended up leaving gaining 1 pound of boost..

On the drive home I went to a long straight private road and in fourth gear with the EBC off I made 16psi @ 5500 rpm..

Any clue as to why my car wont make boost on the dyno but it will on the road?

My mods are as follows..
Pod Filter W/ 3" intake pipe
Highflowed OP6 Holset recore w/ R32 GTST 10PSI actuator
Deatchwerks 320lph Fuel Pump
Sard FPR
650CC FIC Injectors
Greddy PRofec B-spec II EBC
Splitfire coils
3" exhaust
Nistune type 4 daughter board

Any help would be much appreciated! next step will be changing the actuator to 18psi and removing the EBC..
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