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Your new Nissan R35 GTR Twin Turbo V6 awaits

 

 

Your new Nissan 2007 GTR Twin Turbo awaits,

 

as you use your key to unlock

 

 

and enter the cockpit to one of the worlds greatest fighter jets, oops, sorry….

 
 
as you seat your self snugly in the futuristic surrounds, you tremble at the thought of the coming experience

 

 

Awaiting your firm touch to stab the ‘START’ Button

The GTR sits still awaiting your intentions idling at a steady rate with a muted growl..

You know you have everything at your disposal to dispatch nearly all comers

The twin turbos are awaiting your command, ready to blur the horizon at will

You know that the incredibly designed aerodynamic body can scythe through the air, remaining stable at any speed

the rear mounted transaxle gearbox able to withstand any punishment

from the state of the art  twin turbo’s with integrated exhaust manifolds for instant response

the low restriction exhaust playing its part in delivering the best possible throaty snarl when the Godzilla is unleashed

The Brembo disc brakes ready to wash off 100’s of kilometers per hour in seconds

You will be extremely well informed of all operating parameters of the GTR at any time

with the comprehensive multi – gauge display able to show most functions at a touch.

https://nissan.turboclub.com/

Nissan Skyline HR32 Turbo AWD Turbo Car Club TurboClub.com

NISSAN Skyline R32 GTS4 Turbo AWD RB20DET INTAKE MANIFOLD Rebuild

Nissan Skyline HR32 GTS-4 AWD RB20DET  Intake Manifold Modification

Complete Nissan Skyline RB20DET INTAKE MANIFOLD Rebuild by Greg! 

Index Page  –  4 More Pages
Nissan Skyline GTS4 AWD  RB20DET – Single Turbo 2Ltr
Complete RB20 INTAKE MANIFOLD Rebuild!
RB20 Custom Intake Manifold

Nissan RB20 Custom Intake Manifold

This is how the intake looked after fitting the Nissan Skyline GT-R HR33 FMIC -( Front Mount Inter-Cooler)  to the front of the Skyline GTs-4.  Obviously the air inlet tract is traversing the front of the engine over to the original position of the side mounted inter-cooler piping, then progressing along the original cast pipe with the BYPASS Valve (NOT BLOW OFF VALVE – ITS AN AUTO!!) to the original throttle body. The BYPASS Valve assy and tube was used to complete the factory look and function in final execution of the system.
 

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This solution is not the optimum because of HEAT SOAK and the distance for the air to travel, creating lag.

The solution as it occurred to me was the manifold entry point and throttle body should be at the front of the manifold for efficient flow from the incoming inter-cooler piping. With the basic design in my head I worked out very roughly with foam and tube where the best location would be. There were many things to take into consideration in this complicated modification. Most of all efficient and safe operation with a factory look and feel determined the final outcome, including the crinkle black finish. This was done by the coating company that suggested it instead of polishing the aluminium.
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Here you can see the original Intake Manifold has been cut in half to remove the original throttle body mounting and the Coolant Bleed Chamber. I mocked up the intended plenum and the front curved extension neck to mount the original throttle body back on to for ease of construction. I also wanted to reuse the original TB for continued integration into the standard Nissan ECU.
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So considering that the best idea would be to shorten the inlet to the end of the front of the original manifold, I set about making a mock up of the shape I considered that would be the best in terms of flow and capacity for a decent reservoir of pressurised air ready to be used on the next intake cycle.
Considering that the Nissan RB20DET is not exactly a low RPM torque monster, I had dividers made up for each intake duct to lengthen the runners a few inches as the larger capacity plenum allowed.
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Hopefully the dividers would create a bit more torque down under 3000RPM where the Nissan RB20DET 2.0ltr 6 Cylinder Engine is definitely lacking before getting into boost


Finished Job Xmas 2005 Notice Aluminium and Glass Bowl at rear of Manifold with pressure relief valve at top. This is the alternative engine coolant system that allows bleed off of any air in the coolant system that can reduce its effectiveness.

NEXT Page – P1 / 4
Nissan Skyline HR32 Turbo AWD Turbo Car Club TurboClub.com

NISSAN Skyline R32 GTS4 Turbo AWD AFM & Airbox Mods

NISSAN

Skyline HR32
GTS4 AWD

Complete RB20DET INTAKE “TURBOCLUB RB AFM”
Rebuild!
Nissan Skyline GTS4

RB20DET – Single Turbo 2Ltr
4 Speed Automatic
AWD

RWD Bias until more grip needed then Front
Wheels engage.

Complete RB20 INTAKE “TURBOCLUB RB AFM” Rebuild!
MID2004
Index Page

Click on the images below  to see a larger view

The main reason for this mod was that I wanted to
fit larger RX7 550cc Injectors to the RB20 in my
quest for 250AWKw, and not be restricted by the
standard sized AFM.

_Nissan_RB20DET_AFM_01.jpg (63833 bytes)
JAN2005 – “TURBOCLUB RB AFM” Mod Proven to WORK!!
Car completely drivable with 550cc RX7 Injectors.

 

MID2004 – In doubling the size of the metered orifice that was the Original AFM I guestimated that the increased size for a given RPM would slow the airflow measured by the AFM so the
larger injectors would open less to keep the Airfuel ratio roughly correct.

Hopefully this would be enough to be able to drive it to a Dyno
to get it properly tuned for the modification so it is 100% smog legal.


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This is how the AFM looked after cutting up the plastic tubing surrounding the post and electronics box and connector still intact and ready to measure a lot lower airspeed in the new larger orifice .

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Here you can see the original Intake Air Box has been cut to remove the original AFM body mounting and the hole extended to suit the
larger custom AFM assy. The new duct was made from welded aluminum sheet formed to suit the size required to double the original with a rounded lip to smooth the airflow.
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The AFM post assy then was refitted to the new larger diameter tube in the same position as original.


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NISSAN Skyline R32 GTS4 AWD  AFM & Airbox Mods

 


 


 
JAN 2005 “TURBOCLUB RB AFM” mod finished and
proven to work – completed “TURBOCLUB AFM” insitu below..

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Because I fooled the ECU with the 550 cc injectors and the double size AFM I suspect the ecu is giving incorrect timing.

Obviously I expected to have to retune the ECU anyway to suit the fuel and air mods but may have not realised the timing implications.

Well as mentioned I took the Nissan HR32 GTS4 to Dr Drift – Sam Cornell this morning to see if we could sort out the bad noise problems and generaly check over the entire ECU etc.

As he is the only person that seems to specialise in remapping the Nissan ECU in Melbourne I was happy to only have to drive 20 klms instead of 1200 klms to Adelaide to see Martin Donnon again just to tune the car.

Sam seems to know what he is on about and said he would do a baseline run just to see what was going on regarding my concerns on the modified AFM I had created to allow the Mazda RX7 550cc Injectors to work OK on the
RB20 and at least be drivable to be able to get it to a workshop to be tuned._Nissan_RB20DET_AFM_02.jpg (55923 bytes)

I have to say that in talking to Sam, (Dr Drift) initially before taking the car over to his workshop, he expressed some concerns with the Mod AFM causing a problem with the AF ratio and the fact it may be extremely
difficult to map the mod AFM to get good stable AF ratio and it may be running lean.
he suggested that some of the 15yr old AFM units are causing some problems and maybe worthwhile to get a new Z model AFM that he
could easily map.

Well after running the RB20DET up on the dyno he logged the AFR at a steady 12.2 across the rev range! AFM Modification PROVEN TO WORK with 550cc Injectors near spot on. The timing needed a 2-3deg retard
but that was all on 13PSI the std gate non bled pressure. Admittedly the idle was a bit ordinary, mainly ok but occasionally hesitating and near stalling but at least fully drivable.

OK what was the RWKW?? – DAMN only 106!

The problem is that the virtually brand new $800 Soderstrom torque Converter is totaly slipping all the way to 5000rpm and Sam could not go any further until I get this issue fixed!

I remember that Martin Donnon did say when he tuned it at MorPowa up to about 180KW that he suspected that the trans was slipping then but I did not want to believe it because I had recently spent $3000 on getting it completely rebuilt and how could it possibly be the problem?!?

 

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On the return journey home to Victoria I blew off one of the inter-cooler hoses passing a truck and was able to fasten it again without too much drama and I said to myself  “THATS why Martin could not get the
power up, it must have been loose and leaking” – Stupid me!

Glenn, (Turbine) suggested we drive over to Street & Strip Automatics in Seaford where he got the Jatco for the RB20DE+T Drag Car built to talk to Alex about what to do to sort it out.

Looks like I will have to book the GTS4 in for a week or so for him to remove the Soderstrom TCI 2700 Stall Torque Converter to get sent away for rebuilding. As well I intend to get the whole box disassembled to be rechecked that all the expensive kevlar clutches and bands are still OK after ONLY less than 5000K’s of driving around reving the car at no more than 3000RPM because of the noise problem that no one seems to be able to accurately identify.

I am starting to wonder if maybe the strange noise is the bloody transmission as well!!

 

AGP2006 SAU VIC Nissan Skyline GTS4 Turbo Car Club TurboClub.com

Nissan Skyline R32 GTs-4 Turbo AWD Intercooler Upgrade

Nissan Skyline HR32 GTS4 Intercooler Upgrade Modification by fitting FMIC from Skyline GTR



NISSAN

Skyline HR32 GTS4 AWD Turbo

HR32 SKYLINE GT-R INTERCOOLER  UPGRADE to SKYLINE GTs-4 AWD  (FMIC in Stealth Mode)

RB20DET Single Turbo 2.0  Ltr 4 Speed Automatic  AWD HICAS

First Intake Modification.

This is the first modification of many I did to my Skyline over ten years of enjoyable ownership. The inter-cooler was the easiest issue to overcome with some simple piping.
Of course this was not good enough for long, as I really wanted to get rid of that long pipe and reduce lag and heat soak!
See what i did here to totally modify the Nissan Skyline GTS4 Intake Manifold to front entry reducing the air passage and throttle response!

_Nissan_HR32_GTS4_FMIC_01.jpg (152980 bytes)

 

The Nissan Skyline HR32 GTS 4 AWD seems very naked about now with everything removed to explore the options of the Skyline GTR standard Front Mount Inter-Cooler (FMIC) upgrade.

The front mounted Nissan Skyline GTR HR33 Intercooler fitted perfectly into the frontal radiator area with a bit of massaging with a saw into the plastic front clip.

There is actually a fair amount of flow up under the standard bumper bar to the top of the inter-cooler as well.

That is why I have fixed on a extended piece of flat Aluminum to ensure air goes though the FMIC at the top instead of taking the easy path straight over it.

 

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I had been to quite a few places to try to get some “expert” advice on what I should do to inter-cool the car for proposed higher boost as I want to break into the 12’s.

The advice from one shop was to makeup a hybrid I/C from two smaller coolers and come in the top and out the bottom and back to the original piping in the engine bay.

This sounded OK and the price seemed reasonable around $1800 for the work involved.

BUT every time I called in to see them they were always too busy to do anything this week!

So another shop come up with a second hand cooler from a truck core and piping at a great price under a grand so seemed to be a better idea. BUT they were very busy also!

SO what to do…Then I visited John and saw the GTR cooler and made an offer of $600.
I kicked my self two weeks later when I saw another one fully polished and detailed for $900. This Inter-cooler was actually supplied by a chance visit to see John Martin at  OrienT Express who had originally sold me the car in ’97.

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The original holes for the two inter-cooler pipes. The rear hole
usually being for the turbo outlet.

In this mod it will be the front hole used for the turbo outlet to allow clearance for the 
Modified Nissan Skyline Air Flow Meter (AFM )

– (more about the modified AFM here)

_Nissan_HR32_GTS4_FMIC_09.jpg (110379 bytes)

 

 

 

 

 

The Stainless Steel pipes and straight sections I bought locally at about $18 for the bends and $20 for a metre length.

The hose I bought at a good rate from the scrap bin. They made up for it on the fancy clamps which cost about $7 each though they were worth every cent.

_Nissan_HR32_GTS4_FMIC_12.jpg_Nissan_HR32_GTS4_FMIC_18.jpg

I am sick of the standard type screwdriver fastened clamps as they never seem to hold for long and always come loose.
These clamps do not!

Well not until you are in the middle of nowhere anyway;-)

 

 

Like on the return trip from Adelaide after Martin Donnan Dyno’s the car! Lucky the clamp was accessible through the front intake
and did not cause too much drama except when returning to Melbourne on the outskirts and I had a drag with a Commodore.

The boost must have been leaking previously when Martin Dyno’d it and set it at 15PSI.  By the way it accelerated and then started detonating I figured it must be way higher and when I checked it on the boost gauge  hidden under the Ashtray it was over twenty PSI!

_Nissan_HR32_GTS4_FMIC_19.jpg

Tucked tight under the FMIC outlet pipes is the high volume oil cooler and 12v fan for those days when the oil temps may get a bit higher than normal.

 

 

 

The airflow through the front clip side hole also forces down through it at speed adding to the cooling effect. This view also shows the custom Oil Cooler system that I have engineered to reduce engine oil temperatures for the drags and mainly circuit track days.

 

 

 

Having driven the Skyline GTs-4 for a few weeks now with the upgraded GT-R FMIC, the ECU seems to have retuned the Air-Fuel ratio’s to be a bit leaner and the power has increased with
the boost still set at 10psi.

The modified fuel rail and RX7 Fuel Injectors will certainly be able to cope with any boost increase in the future.

It certainly has made a difference that I was able to detect while driving out of the garage the first time after fitment! The revs seemed to build quicker and the response to the throttle was much better.

 

 

_Nissan_HR32_GTS4_FMIC_16.jpg

On the passengers side where the original Side guard mounted Intercooler was now holds a securely mounted air  conditioning condenser that has a huge
volume and high flow though for the 
modified Nissan Auto Trans ( – More Here
)
to keep the temperatures down when stalling up the 2800RPM Soderstrom Torque converter at the drags.

_Nissan_RB20DET_AUTO_01.jpg

This massive cooler also gets air coming in the front clip passenger side entrance duct but is also assisted by two 12vDC Computer fans for good measure while stationary at the drags.

After spirited driving on the turbo a bit I can touch the outlet
side where its very cold while the inlet side is quite hot as you would expect.

From experience the temperatures from the
turbo can be up to 200’c in extreme circumstances so any reduction makes a difference!

 

_Nissan_RB20DET_AUTO_07.jpg

 

By the way anybody out there with an Auto Nissan Skyline GTS, or most Turbo Auto’s its not so much as a blow off valve on the intake piping as a BYPASS VALVE!!

The function of this item is to open immediately you push the throttle to bypass air to get everything happening quickly.

If you don’t believe me just pinch the vac line (or put in a tap as I did) and see how much more slower you get off the line! Its an Automatic remember and you don’t take your foot of the throttle to change gears like manual cars do (mostly;-) where you need to vent boost from slowing the turbo!

 

 

blow off valve on the intake piping as a BYPASS VALVE!!

 

 

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