Tips On Getting The Attessa 4wd To Engage Faster

[MJTru]

See Nissan got a little smarter on subsequent models and they determined that in order for the ATTESA all-wheel-drive system to come into play faster once wheel spin is detected, the transfer case should be preloaded (with hydraulic pressure). This meant that as soon as the pump was switched on by the controller, the system would already have significant pressure to dramatically reduce the time taken to engage the front wheels. We're only talking about milliseconds here but anyone who has driven both an R32 and R34 GTR on the limit will appreciate the difference.

I stole that from an article. Sorry.

There most be a faster way to engage the attessa 4wd system way faster. This is like such a big difference its ridiculous. Some would say us a electronic torque split controller. Is it possible to do it manually for the purpose of getting a better launch. What are some mechanical ways to have it done??

I was thinking of a hand pump to engage the system with some kind of pressure release at a certain speed. You would have a hand pump with a gauge and have it fully release to do a burn out. Then pump it up for the launch. Leave the line and at a certain speed have a release vavle let the pressure to to reduce drag on lets say cars without the potential to rip the tire loose in all gears. Like mine. :lol:

Am i crazy??

[Hadouken]

Would it not just be easier to use a torque controller?

Can't you set some of them for preload? Say 10% front and 90% rear under normal conditions and then when it detects slip it will go 50/50?

[MJTru]

Im not sure if thats how it works i never used one. But how fast is the reaction in comparison to r33 and r34. I was looking at fullrace ets pro.

[Hadouken]

http://www.sau.com.au/forums/topic/413212-full-race-ets-pro-centre-diff-torque-split-controller-install-into-r32-gtr/

[djr81]

The way to fix it is to get the system to basically ignore lateral accelerations like the Ruzik system does. Works much better then.

[QUP29]

Is this what your looking for?

[GTR_JOEY]

Easiest way is to tap a thread behind the actuator on the transfer case and use a bolt to pre load it.

Expensive way is the t case mod by changing the plates.

[MJTru]

Is this what your looking for?

image.jpg

Man. Why you do this to me wit no details.

[MJTru]

This is the rod between the piston and fork. If i mod this to be an adjustable unit. Im thinking it can compensate for a worn disk. What you guys think

[MJTru]

Hmm

Just had a wierd idea again. Is there a way to activate the attessa system using a button and let it go after the launch. Just to have it in full 50/50 split off the line. ????

[KiwiRS4T]

This is the rod between the piston and fork. If i mod this to be an adjustable unit. Im thinking it can compensate for a worn disk. What you guys think

I think it would be like replacing the pressure plate on a clutch without replacing the driven plate. It might improve things in the short term but wold soon wear out what's left of the driven plates. However it would be relatively easy to try - certainly easier than transplanting the whole attessa system from an R33.

Local tuner Glenn Suckling built a 7 second R32 and says he had 3 computers controlling the awd but I suspect it took many thousands of $$$ as well as a lot of time so probably not an example for you!

http://www.speedhunters.com/2013/05/7-second-itch-thegds-motorsport-gtr/

[MJTru]

Im saw an r33 gear box for sale. But dont know how to identify a r33 box. But that wouldnt be the solution. The reaction time would still be laggy comparing to the r33. Unless the preload is in the case and now created by hydraulic pressure. ???

[MJTru]

Im reading these threads. Leaning hard to fullrace ets extreme. Still need to understand the system tho. I love the launch from a r33. I have most of my money in my r32 gtr and need to get it off the line if not equal as my r33 even better.

[KiwiRS4T]

Im reading these threads. Leaning hard to fullrace ets extreme. Still need to understand the system tho. I love the launch from a r33. I have most of my money in my r32 gtr and need to get it off the line if not equal as my r33 even better.

Read the link to Glenn Sucklings car I posted above. It refers to him manually pumping up the awd on the way back to the line after doing a 2wd burnout.

[MJTru]

I will.read it right away sir. Thanks.

[MJTru]

Thats simply what i want. Unlike him im far from 1628hp. So i wont need the 4wd all.the way down the track. But im envisioning the set up ill need to do. Ill just need full 50/50 for 2 gears. 1st and 2nd. Then i can have a electronic valve at the hit of a button release the 4wd. For less friction and more rwd movment. So ill plot it out. Just one thing. Whats the max pressure needed for full engagement. I can do this.

[MJTru]

Ok let me take a few moments to explain what im thinking.

I want to retain the factory system and have a manual pump up system. So ill send the attessa line in the car with a bottle valve. This valve will separate the factory system from my manual system im going to set up on the other side of this bottle valve. (Towards T-case.) All the mods happen here. Im going to use a 240sx hydraulic ebrake setup to pump it up. Im going to have a pressure release valve in line so i cant over pressurize the system (will need to know the max attessa pressure for full engagement.) Next im planning on this pressure side to T-case have an emergency electronic release valve . Im planning on having some kind of computer at predetermined speed engage. Letting the attessa system bleed back to resivour. I will have one way check valves stoping the pressure to interfere with the manual pump when the valve is open for normal operating.

Hope its doesn't sound crazy. Lol. Ill draw it out on the weekend.

[Ben C34]

I like the way you are thinking!

[MJTru]

Ok. I got greenline to supply the disk to me. And ill rebuild the transfercase.

I just finished installing a r32 gtr attessa pump on my gts4 after i found a leak on the pressure sensor. First it was a hose i changed that clean everything. Next after a day of driving i found more oil on the diff. So i pulled the whole diff from the gts4 and replaced the pump with the whole unit from the r32 gtr. Ill post back the results. Soon.

[Duncan]

I guess you are using this for drag racing use only, for circuit or rally use there are a range of electronic controllers that give excellent results.

For drag use I've either seen custom system like you are looking at, OR, HKS used to make a controller for drag racing that provided a fixed split.

There is nothing wrong with the mechanical system for drag use, you just want it to operate at a different time....so the right computer is all you need