R31 GST-X Coupe - VG30DET

[psi999]

Thought i'd post up my Skyline, for the moment its a work in progress but am planning on having it ready to hit the dyno early next year.

Specifications:

· VG30DET Engine Conversion (STANDARD flywheel figure as quoted by Nissan Japan = 190kw @6000rpm & 343NM @ 3200rpm).
· VG30DETT 5 speed – Z32 300zx
· Exedy single plate brass button clutch
· Custom balanced 2-piece tailshaft
· Custom intercooler
· Bosch 040 fuel pump
· After market 16 inch thermo fan
· 5 stud conversion
· R32 GTR 298mm slotted disks with matching GTR 4 spot calipers (front)
· R32 GTR 300mm slotted disks with matching GTR 2 spot calipers (rear)
· Endless Brake Pads
· Pedders “Sports Rider Suspension and Springs” with new bump stops, urathane bushes
· Projector headlights
· R32 GTR 16” x 8” rear rims
· R32 GTS-T 16” x 6.5” front rims
· Azenis Semi Slicks all round
· Sony CDX – M800 head unit
· JL Audio 6.5” splits (front)
· JL Audio 6” x 9” (rear)

recent mods:

· Haltech E8 ECU
· MSD DIS-4 CDI
· MSD Blaster coils
· 550cc Injectors
· Custom 10mm ignition leads
· Garrett GT3540-IW (700hp rating, 1.06 rear exh hsg)
· 4" exhaust to 'high flow cat'

Mods i'm planning now:

· Custom plenum chamber
· Larger intercooler piping
· 95mm throttle body
· 264 or 272 cams
· Greddy Valve springs / retainers

Now for some pics (some old and some new).





















I hope it goes alright once the new setup is complete, sure has a bit of fruit now.

[stradlater]

Why the devil did you down size the inducer like that????

[psi999]

Why the devil did you down size the inducer like that????

Space limitation my friend... can be seen in the last pic.

4" down to 3"

[stradlater]

That's gonna kill your flow.. Turbulence galore.

[psi999]

I agree its not the best, but much better than no airfilter at all.

next time the turbo is off i'm inteneding to have the comp cover spun down to 3", will relieve my space issues.... but for now it should be fine (so far has not caused any issues, inc the 20psi that the turbo produced on the dyno with the old ECU).

[Crash]

Looking good Jon. How soon u getting the plenum done? Make sure u get plenty of detailed pics of it for me

And u going with the Haltech now?

[psi999]

Looking good Jon. How soon u getting the plenum done? Make sure u get plenty of detailed pics of it for me

And u going with the Haltech now?

No worries dude!.

yeah sold the Autronic SMC, the new Haltech E8 is technically a much better ECU (specification wise).... SMC is actually quite lacking in some areas.

[pisana]

got enough cars?

sheesh.

both are mint as is the bike.
________
MilkMyBoobs cam

[oxy]

both are mint as is the bike.

That cause they never get used

[23Kev]

got enough cars?

sheesh.

both are mint as is the bike.

Are you talking about his mountain bike cause it's never been ridden?

Nice car though mate, will be great once this and the Et get up and running perfectly, runs at "the bank" for sure!

[2JZR31]

Another 31 that makes mine look like a pile of shit!

Sweet car. I just won an XR6 spec GT3540 on ebay for $1000, so we will have to have a GT35, 3 liter powered R31 showdown on of these days! (no corners lol)

[floody]

Very awesome!
Should be good once its all sorted. I wonder how the VG compares weight wise to the RB20s, its so short and low!
Way neater than mine outside too.

[psi999]

Floody – Cheers mate & as for engine weights, I’ve been told that a VG30 is actually lighter than a red top RB20 by a bloke that’s allegedly had it on a scale (he has a VG30DET powered S13), it sure is a lot shorter than a Rb20 though.

2JZR31 – Cheers, I would not mind checking out yours as well.

That turbo is going to be FANTASTIC on your 2JZ with the ford 0.50 front cover. My version which is identical (bar 0.70 cover for a bit more top end) has very little lag.

I was actually quite surprised how little given all the negative feedback I received stating that it was way too large for a street car – I think a combo of a light car, big motor and decent BB turbo has overcome much of the lag issues others thought it would have.

You have made the right choice & I’m keen for the 3L R31 showdown at the bank of willows…. Have you got plans to install cams etc as well?

[Cal]

Hey that's nice. So much better looking than any Skyline after them in my opinion.

Cal.

[psi999]

Hey that's nice. So much better looking than any Skyline after them in my opinion.

Cal.

Thanks Cal, thats what i reckon too

Found one more pic parked in the garage next to the shitter.

[2JZR31]

We will have to organize a few people to head to willowbank one of these days. ATM, my plans only include the turbo, and a rising rate fuel pressure reg. From many reports this should be good for over 300rwkw. I will see how it goes from there.

[edo]

Jon, at the risk of upsetting you even further with yet anothet OT post...may I say cleanest garage floor evar!

[oxy]

Jon, at the risk of upsetting you even further with yet anothet OT post...may I say cleanest garage floor evar!

It doesn't look like that anymore, but it did look pretty awesome when it was first painted

[psi999]

Shit yeah, it’s a bit dirty now but have started cleaning it up to return it to its pristine state.

[2JZR31]

Any boost control issues with the internal gate? What spring does it have in it?

[edo]

Dirt came from non dattos...burn them

[psi999]

Dirt actually came from Seat, farking shitbox dirtying up my datto collection.

2jzr31, at this point i cant tell you but can tell you i have spoken to people that run this turbo with success (btw - ive got the 12lb wastegate).

[DCR]

Lots of work been done there by the looks.

[floody]

Floody – Cheers mate & as for engine weights, I’ve been told that a VG30 is actually lighter than a red top RB20 by a bloke that’s allegedly had it on a scale (he has a VG30DET powered S13), it sure is a lot shorter than a Rb20 though.

Yeah I'd definitely believe that regarding the weight. IMO the RB20's really pretty overbuilt and very space inefficient for a 2 litre six, the V6 is a thoroughly more modern bit of gear.
Should be nice and balanced.

Is the HICAS stuff gone from yours? Interested what they did to lock the subframe up if it is - I'm going with either alloy spacers or Urethane bushes.

[psi999]

Yeah I'd definitely believe that regarding the weight. IMO the RB20's really pretty overbuilt and very space inefficient for a 2 litre six, the V6 is a thoroughly more modern bit of gear.
Should be nice and balanced.

Is the HICAS stuff gone from yours? Interested what they did to lock the subframe up if it is - I'm going with either alloy spacers or Urethane bushes.

HICAS has been removed, but i asm not exactly sure how the subframe has been locked up, i'll take a look next time i'm under the car.

Found some more pics from a R31 cruise.





Sorry about the size

[Uncle Arthur]

Ripper car, even if it is lame white Look at that donk, and that BIG turbo, wow, Nissan V6 FTW

[Evo_Lee]

Jon, very clean looking car and the garage floor.

[psi999]

Well i bought a spare motor and decided to cut up the stock plenum for the basis for my new forward facing throttle body plenum (with about double capacity of OEM)..... 3 grinding wheels later this is what i was left with.

Decided that reversing the orientation would suit my needs best (as I'll be fabricating a new front section)... the now rear will not require a lot of work.



Front (what was the back OEM)



Card board mock up




Looks like i've got a fair bit of work to go before i'm ready to start welding i reckon (more cutting & die grinding partitions away/smoothing out).

[psi999]

well decided that the above was a bad idea so have fabricated a whole new bottom section from 6mm alloy plate.

few progress pics, so far the runner holes have been roughly milled at 38mm and will need to be opened up to 45mm by hand (die grinder) so i can get it to match perfectly with the runners, then tapered like the standard plenum.




Also a pic from the last time i had the car on the dyno.

[psi999]

was at the wreckers yesterday picking up a power steer pump for my Corolla and spotted one of these - Nissan Z32 300ZX RS5R30A gearbox.

This is the same gearbox as i run in my R31 so decided to pick it up for a spare... got it for a pretty good price.





This box is pretty much the dux nuts of all nissan gearboxes (stronger gearset than a GTR or RB25 i'm lead to believe as it has a much larger 2nd gear) , 300zx's run 9's on them in the US but i thought it's always safe to have a spare in the shed