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R33 Auto Aftermarket Ecu Suggestions

dangerman4

By dangerman4,
in Engines & Forced Induction

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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

only because its been covered 100's of times before and the search button is your friend.

If you wanna get back onto specifically ECU, and not the AUTO part of the 300rwkw, then this thread has done its use-by :P

dangerman4 Mentor

dangerman4

Posted
  • Author
Posted

he r31nismoid i have looked thru many a thread, yet still havent got very far.. what would you recomend for me to get as a ecu? or can you point me to a thread that might help... cheers...

4door_Sleeper Veteran

4door_Sleeper

Posted
Posted

Have a chat with the guys at MV Automatics in Blackwood (Adelaide SA) they have done a lot of this stuff. You can get Valve Bodies, Torque converters, Carbon Fiber Clutch packs (I believe) etc from them. I have also heard that some of the Nissan Patrol parts are interchangable for high torque applications.

Remember its not the KW that will kill a transmission its the Torque and heat.

Sydneykid Grand Master

Sydneykid

Posted
Posted (edited)

Once again the ECU and Auto gearbox ECU questions get totally off the plot.

Search all you like, there is no full ECU replacement for auto Skylines. The current situation, as I see it, is you have 4 choices;

1. Suffer harsh gearchanges and reduced gearbox life and use any ECU you like. They are all the same as far as the gearbox is concerned. None of them have the gearshift logic programming for cutting/retarding the ignition timing on gearchanges. Saying that Microtech or Link or Power FC or anyother ECU is better for autos is absolute crap, NONE of them have the programming.

2. Use piggy backs, SAFC, SITC, EManage (there is a claim that EManage now works with Skyline ignition, but it is early days yet) or Exede (still under development). They all retain the standard ECU and therefore its program for gearshift logic ignition retard. What's the limit as far as amx power is concerned? I don't know, I haven't seen anyone reach 300 rwkw with piggy backs yet, there are a few around 250 rwkw though.

3. Change the gearbox to manual and use whatever ECU you like.

4. Change to a stronger auto, you will still have harsh changes and the life of the gearbox will be less (than it would with ECU programing for gearshift). Or upgrade the components in the standard gearbox, so they last a bit longer. Or use a manual shift controller, so you decide when the gearchanges are going to occur (you can take your foot off the throttle on the gearchange).

This is not going to change as far as I can see (so don't search again tomorrow for a magic solution) because no one is going to spend the money developing the programming for an aftermarket ECU for Nissan autos. It would simply cost far too much and be unsaleable (no one would pay the price). This has been the case since 1989 so why would it change now?

:D cheers :P

PS; Yes, there are Power FC's for auto Toyotas but they have comletely different logic in their gearshift and ECU. This means no complex programming is required (like a Nissan).

Edited by Sydneykid
dangerman4 Mentor

dangerman4

Posted
  • Author
Posted

just a question...

I have been led to believe that when setting up any aftermarket ecu eg wolf, power fc, etc they will give you grief with gear changes..

But has any one tried leaving the standard computer in control of the auto and other car functions and wiring in the aftermarket ecu to control timing, fuel and boost etc.. basically running the engine from the wolf and the trans and car from the standard ecu.. i believe this can be done just by getting another ecu loom plug from the wreckers and cutting out the wires not needed... any thoughts?

32vspecII Mentor

32vspecII

Posted
Posted

doesnt work , read above .

"1. Suffer harsh gearchanges and reduced gearbox life and use any ECU you like. They are all the same as far as the gearbox is concerned. None of them have the gearshift logic programming for cutting/retarding the ignition timing on gearchanges. "

SK has completely summerised they options avaliable and there are no more .

dangerman4 Mentor

dangerman4

Posted
  • Author
Posted
doesnt work , read above .

"1. Suffer harsh gearchanges and reduced gearbox life and use any ECU you like. They are all the same as far as the gearbox is concerned. None of them have the gearshift logic programming for cutting/retarding the ignition timing on gearchanges. "

SK has completely summerised they options avaliable and there are no more .

hence read what i said...

Josh Grand Master

Josh

Posted
Posted

The two ecus would have to be able to communicate in some way - like the stock one would have to be able to cut the timing etc when shifting... don't see how that would work tho... would be really complicated if at all possible..

rob82 Mentor

rob82

Posted
Posted

Yes, a heap of people have tryed wiring over the top of the original harness. The problem is that in order for a proper change the ignition must be cut back a certain degree as a sort of torque reduction operation. Now if you could use the output of any one of the torque solenoids as input into a computer that was able to retard timing a certain amont then it would be able to be done. How well it would work is unknown and I only now of one computer that could do it.

Josh Grand Master

Josh

Posted
Posted
there is no shift logic in the ecu you want to control the engine.

also you will have problems sharing sensors , for example the TPS signal which both ecus will require just to operate properly let along change gears properly

Thats what I was thinking - The ECU's would have to know when to let each one take over to control the shifting(Timing etc)... I don't think it would possible(Well not cheaply or simply) It would be too complicated...

rob82 Mentor

rob82

Posted
Posted

You shouldn't share any sensors when wiring an aftermarket computer over the top of the original ecu as the internal biasing will most likely be different. Whenever we wiring in like this we always install new CLT and IAT and sometimes TPS sensors.

dangerman4 Mentor

dangerman4

Posted
  • Author
Posted

cheers for your imput guys... it was actually the sales rep from wolf that suggested wiring the two computers together.. he may have ment leaving the standard computer in control of timing so therfore it can control the auto, and use the wolf for everything else.. not sure.. but he was fairly sure it would and does work well...

32vspecII Mentor

32vspecII

Posted
Posted
. it was actually the sales rep from wolf that suggested wiring the two computers together.. ..

thats no surpise , there was a very prominant wolf dealer on here who insisted that it would work also until you finally pinned him down on the facts and then it was admitted it acted exactly like every other ecu

so dont worry many of us went through the same process of investigation and finally acceptance of our fate when we got a 33 auto

then i just got a manual conversion and powerfc and never worried about it ever again

Sydneykid Grand Master

Sydneykid

Posted
Posted (edited)
just a question...

I have been led to believe that when setting up any aftermarket ecu eg wolf, power fc, etc they will give you grief with gear changes..

But has any one tried leaving the standard computer in control of the auto and other car functions and wiring in the aftermarket ecu to control timing, fuel and boost etc.. basically running the engine from the wolf and the trans and car from the standard ecu.. i believe this can be done just by getting another ecu loom plug from the wreckers and cutting out the wires not needed... any thoughts?

You could use any ECU to control the fuel and use the standard ECU to control the ignition (for cut/retard on gearchanges). The control of ignition timing must at all times remain with the ECU that has the shift logic programming (ie; the standard ECU). That solution would be hardly any better than a piggy back solution like an SAFC or a DFA. It would certainly be inferior to SAFC + SITC or EManage (if it is finally bug free) or Exede (when the development is finished).

:D cheers :P

PS, quick clarification, the (engine) ECU has absolutely nothing to do with the actual changing of gears. That is handled by the (transmission) ECU.

Edited by Sydneykid
dangerman4 Mentor

dangerman4

Posted
  • Author
Posted

thanks for being truthful... I hate when sale guys bullshit to you just to get a sale.

so then i change my question... emanage, emanage ultimate, or rebuilt vlturbo trans with a high stall and install power fc...

obviously the last option is big dollars but the best result...

amy thoughts :P

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