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Nissan GTS4 I/C U/G

NISSAN

Skyline GTS4 AWD

HR33 GT-R INTERCOOLER UPGRADE

(FMIC in Stealth Mode)

RB20DET

Single Turbo 2Ltr
4 Speed Automatic
AWD HICAS

Click on the images to see a larger view

	The GTS4 seems very naked about now with everything removed to explore the options of the FMIC upgrade
	The front mounted GTR HR33 Intercooler fitted perfectly into the front 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 bar to the top of the intercooler 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.

This Intercooler was actually supplied by a chance visit to see John Martin at OrienT Express who had originally sold me the car in '97?

I had been to quite a few places to try to get some "expert" advice on what I should do to intercool 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 in Autobarn Sunshine for $900.

The original holes for the two intercooler 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 AFM (more here)

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 Purple Pig at a good rate from the scrap bin. They made up for it on the fancy clamps which cost about $7 each though.

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!

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.

	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 Auto Trans to keep the temperatures down when stalling up the 2800RPM Soderstrom Torque converter at the drags.
	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.

	Having driven the Skyline for a few weeks now, the ECU seems to have retuned itself to be a bit leaner and the power has increased with the boost still set at 10psi. 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.
After pushing it a bit I can touch the outlet side where its very cold while the inlet side is quite hot as you would expect.

By the way anybody out there with an Auto GTS, 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 Auto 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!

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

Nissan GTS4 I/C U/G

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