R32 Gtr Driveline Conversion Into R32 4 Door

[Drift Motorsport]

Hey Guys,

I've recently purchased Front + Rear Subframes from an R32 GTR and will be buying a gearbox and diff/sump setup shortly. Basically I will have ALL of the mechanicals for the GTR driveline.

I can modify the floor pan for the transfer case and front chasiss rails to accept the front drive shafts - no problem. The car is a track only car and I figured this would be a cheap way to make a unique GTR driveline track car considering the driveline only cost me $1500 max for everything. The engine will be an RB30/26 setup good for around 500hp.

My only issue is the control system for the ATESSA.

In its basic form, it is a hydraulic circuit that uses auto fluid to pressureise the transfer case in the gearbox which then engages a clutch and thus drive the front wheels. Vary the pressure - vary the amount of torque split to the front wheels.

My question is, apart from the hydraulic pump and reservior - how can I control the line pressure electronically. I understand that the is a G force sensor under the center console to detect sideways forces and engage the front wheels as well as a few other smarts in the ATESSA ECU and control system.

Short of installing the whole GTR ATESSA control system (which would be a PITA) Can I use a Motec M800 output to map and control the duty cycle of a solenoid / pump / pressure regulator to control the transfercase?

Which parts would I need to work the ATESSA system as a factory system and as an aftermarket system with PWM/solenoid control?

Yours Sincerely,

Costa Tsimiklis

Director

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Drift Shop Australia

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Tel: +61433 220 139 (Voice Mail Service Only)

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Email: [email protected]

[femno]

Wow! Props to you for giving this a shot!!

Since youre running a 26/30, why not transplant the entire GTR ECU and Body looms, along with all of the ATTESA gear into your 4 door?

The only thing that would be different would be the wiring for the doors, but im guessing thats no issue being a track car.

That was would a piss easy way of doing it. No mods needed. Wiring is always a headache otherwise.

[Risking]

Pm sent

[Drift Motorsport]

Femmo,

Risking has sent me a PM with some great ideas of how a 3rd party control system should work However, this control system would need to be re-mapped and tweaked each time torque output or grip is changed. If not mapped correctly, basically you will break the front diff off the sump.

After investigating it further, it appears that the ATESSA relies on the ABS unit to get wheel speed as well as braking forces to compute how much torque to transfer to the front.

The easiest way to do a conversion would be to gut the electronincs and ABS out of a GTR and it should be able to run after a custom install.

Secondly, it is probably cheaper and easier to buy a rolling GTR shell with the electronics and use that as a base if the shell is smashed - or just using a GTR to begin with anyway lol.

I will still proceed with installing most of the mechanical driveline just incase I can find someone thats stripping a stock GTR out that has been smashed