All Eyes On Board - Attessa

[Guest snotass]

Hello there,

i wonder if you can help me .

R32 GTR drag situation - Sunday driver.

No ABS - all attessa bits still in place.

Have a cluey mate as a auto spark but cant get Attessa to work. He believes its because there is no ABS- we have also got a EMS ECU and the engine management is good.

We have all the other inputs sorted out TPS Tach etc.

We were thinking of using the existing Hydraulic pump for the attessa and doing away with the g sensor and wheel sensors etc and electrically stimulating the pump via a variable resitor of sorts.

Some people simple pump it up, but can you still split the tourque between front and rear at what % you want using a guage or will it be full lock or nothing.

I would like to still be able to use the factory set up minus the ABS but if this cannot be done then what can any one suggest? This is the only thing stopping us from doing some runs.

many thanks

[ebola]

As to why the attessa isn't working, well, it might be that the abs (eg - wheelspin) sensors are missing too...

Just getting the pump to work - from what I can work out (from wiring diagrams), its contolled by a a single solenoid. I'm not sure if there is any other imput (computer, etc) to give the torque split, however.

I __PRESUME__ its a variable duty cycle @ full voltage, but hey, guesses are guesses.

If so, it could be switch controlled with some simple eletronics... but I'd be curious about pulse width.

Meh - I still havn't wired up mine yet, so its easy to give advice and not have to take it.

[Guest snotass]

As to why the attessa isn't working, well, it might be that the abs (eg - wheelspin) sensors are missing too...

Just getting the pump to work - from what I can work out (from wiring diagrams), its contolled by a a single solenoid. I'm not sure if there is any other imput (computer, etc) to give the torque split, however.

I __PRESUME__ its a variable duty cycle @ full voltage, but hey, guesses are guesses.

If so, it could be switch controlled with some simple eletronics... but I'd be curious about pulse width.

Meh - I still havn't wired up mine yet, so its easy to give advice and not have to take it.

Yeh i know what you mean - its a road that not too many have taken. Will look into a bit more in the next days and see where i end up.

[GTsauRus]

Hello there,

i wonder if you can help me .

R32 GTR drag situation - Sunday driver.

No ABS - all attessa bits still in place.

Have a cluey mate as a auto spark but cant get Attessa to work. He believes its because there is no ABS- we have also got a EMS ECU and the engine management is good.

We have all the other inputs sorted out TPS Tach etc.

We were thinking of using the existing Hydraulic pump for the attessa and doing away with the g sensor and wheel sensors etc and electrically stimulating the pump via a variable resitor of sorts.

Some people simple pump it up, but can you still split the tourque between front and rear at what % you want using a guage or will it be full lock or nothing.

I would like to still be able to use the factory set up minus the ABS but if this cannot be done then what can any one suggest? This is the only thing stopping us from doing some runs.

many thanks

hey snotass

It has been done sucessfully by nissan. the r32 gtr N1 had the ABS removed, dont know if you could get your hands on an N1 wiring diagram to work it out.

The pump maintains system pressure independant of the ets soleniod the pump runs even when FR torque split is 0/100 when sitting idling the pump cuts in and out briefly.

[Duncan]

The n1 had a different ATTESA computer, not sure what the differences are. Plugs straight into the standard loom, you lose ABS but ATTESA keeps working.

unless you have rewired it the standard ATTESA unit will not run without ABS unit in place. I think T04GTR might have had some luck with ATTESA/no ABS.

[godzl1975]

my car came with no abs but the attessa is working still.....from what i can see the pump at the front of the car is gone and brake master cylinder looks different as well.

just a thought would the attessa ecu from the 3 generation GTR's be compatible with each other?

[exXU1]

my car came with no abs but the attessa is working still.....from what i can see the pump at the front of the car is gone and brake master cylinder looks different as well.

just a thought would the attessa ecu from the 3 generation GTR's be compatible with each other?

I am not sure - all i know is that i need to get this unit working as this is all that is stopping me from doing a run down the 1/4 mile.

Could you please explain where and what you computor came out of , would nt mind trying. I am going to to get hold of T04 GTR and see if he or infact any one can help as i have nearly gone bald with pulling my hair out. surely some one has done this ------- NO ABS - after market ECU - non plug play- G sensor and Attessa units still in place - fault code 18?

I am using a EMS 8860 and there are parameters to stimulate the pump via this - but would rather use existing units.

regards