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ECU 16bit to 8bit

Hi all,

 

My car is normaly sold and i look for a new build in 1996 so with ODB2 and 16bits ecu.

 

have information about ecu 16bit and upgrade ?

 

It's possible to swap 16bits ecu with a 8bits ?

 

thanks

 

JC

Featured Replies

if your talking about tuning chip/eprom .. no ..

 

but most of the other parts of the engine will work

Hi all,

 

i look for a new build in 1996 so with ODB2 and 16bits ecu.

 

It's possible to swap 16bits ecu with a 8bits ?

 

thanks

 

JC

 

Non of the 16bit ecu are true OBC2 so are still limited in their self diagnostic, there is less available generic chip tuning for 16 bit ecu so retro fitting an 8 bit ecu is the most common way of getting around the problem and will work fine.

 

Jeff

Edited by JeffTT

I tune the 16bit ECU in exactly the same way as the 8bit ECUs just with the addition of a daughterboard :)

  • Author

JeffTT : Ok so it's possible if i understand correctly ? but we lose only odb2 connection..

 

Noz : thanks for information, but i live in france :)

 

 

The 300zx 1996 that i want to is already upgraded with ASH chip (ECU was sent to USA for upgrade)

 

And i would like to in the furtur remap for using ethanol (e85)...

 

Sorry for my english

 

JC

JeffTT : Ok so it's possible if i understand correctly ? but we lose only odb2 connection..

 

Noz : thanks for information, but i live in france :)

 

 

The 300zx 1996 that i want to is already upgraded with ASH chip (ECU was sent to USA for upgrade)

 

And i would like to in the furtur remap for using ethanol (e85)...

 

Sorry for my english

 

JC

 

 

 

 

 

Ok Jc votre anglais est très bien et beaucoup mieux que mes français des thats pour sûr! devront donc s'essayer à traduire aussi.

 

Alors tout d'abord oui le bit 8 écus peut être monté sur les bits zed équipées 16, mais je pense que vous avez mal compris le protocole conforme OB2 du zed bit 16 écus, il est première génération et ne pas avoir la capacité d'un système de voiture plus tard que de nouvelles voitures ont maintenant des systèmes électriques canbus (daisy chain, adressée sytem électrique), ce qui donne vrai respect comme apportant la LME (le moteur) sur quand dire un capteur O2 est défectueux ou similaire et peut surveiller avec retour des choses telles que la propagation de couple à travers le moteur avec une grande précision car il ya une rétroaction constante sur tous les capteurs et les unités actives contrairement à une zed qui a très peu.

 

Le bit 16 écus mais ne possède plus rapide et une plus grande quantité de puissance de traitement et également sous forme standard a été conçu pour aplanir beaucoup de problèmes d'émission lors de la conception du moteur a été changé sur les zed plus tard.

 

Comme Noz mentionné ci-dessus, il a la capacité de réglage du bit de 16 écus en utilisant une carte fille, ce que je comprends et avoir seulement vu un couple à la fois ASH et JWT faire de même sans l'aide d'une carte fille, mais franchement, je ne l'imagine il atteint même chose en utilisant une méthode différente.

 

Qu'est-ce que vous cherchez à être en mesure de faire ce que l'ASH écu devrait être à peu près aussi bon qu'il obtient pour a16 peu, est-il juste d'utiliser l'éthanol? juste demandé pourquoi?

 

Espoir qui aide JC

 

Jeff

 

 

 

Ok Jc your English is just fine and a whole lot better than my French thats for sure!!

 

So firstly yes the 8 bit ecu can be fitted to the 16 bit equiped zeds, but I think you may have misunderstood the OB2 compliant protocol of the zed 16 bit ecu, it is early generation and does not have the capability of a later car systems as new cars now have canbus electrical systems (daisy chain, addressed electrical sytem) and this gives true compliance such as bringing the eml (engine light) on when say an o2 sensor is malfunctioning or similar and can monitor with feedback such things as torque spread across the engine with great accuracy as there is constant feedback on all sensors and active units unlike on a zed which has very little.

 

The 16 bit ecu however does possess faster and greater amount of processing power and also in standard form was designed to iron out a lot of the emission issues when the design of the engine was changed on the later zeds.

 

As Noz mentioned above he has the capability of tuning the 16 bit ecu by using a sister board, as I understand it and having only seen a couple both ASH and JWT do the same without using a sister board but frankly I would imagine it achieves same thing using a different method.

 

What is it your looking to be able to do as the ASH ecu should be about as good as it gets for a16 bit, is it just to use ethanol? just wondered why?

 

Hope that helps JC

 

Jeff

Edited by JeffTT

  • Author

:laugh::laugh: google translate... i prefer read your english :punk:

 

Thanks for your reply

 

So it's first version of the ODB2 without all the capability of lastest revision.

 

the 16bits ecu is already upgrade by ASH but not tune with the car configuration...

 

i asked you for downgrade the ECU to 8 bits because in France 300zx mapper only know 8bit ecu...

 

regarding Ethanol :

SP 98 1.38£ per liter

E85 0.8£ per liter

 

In england have you got ethanol ?

 

Thanks

 

JC

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