Piggyback Ecu ?, 98 gt obdll Options

[NWCelica]

Looking for a piggyback Ecu for my 98 gt ct20b swap any suggestions?

Thanks

[Micky_lovescelic...]

Looking for a piggyback Ecu for my 98 gt ct20b swap any suggestions?

Thanks

Hi there,
Well there are a number of ways to achieve control the desired parameters. Of course engine-management is by no means
created equal. It is important to understand how the factory OEM architecture works, the limits, and furthermore understand
how the interfacing functions work on engine-management X, Y, Z.

It's about 8:41AM, almost time for my coffee. So I will give you a general over-view.
( Scatch that, my significant other has decided to be a doll and make me some coffee )

So if I understand correctly you have a 5SFE with a CT20B equipped or did you swap a 3SGTE into
a 1998 Celica GT. No? If you have equipped a 3SGTE in your ST204, and you equipped the correct harness
and ancilary systems. You simply could install a Apex-i Power FC. Which is infact a standalone.

However, noticing that you are from Seattle. I'll default to that you probably have a 5SFE and ST204, and
that you aren't rocking something from the Japanese market.

E-Management Ultimate and E-Manage does not make a ( base map or harness ) kit for the 5SFE.
Or not so I have seen. The e-management itself is configured to a custom / universal set up. This also requires a custom suppliment
harness that must be fabricated. You can select specific features you want to use, but the corresponding sensors must be in place or added.

How e-Management / ultimate works? The simplifed answer is as fallows : 1. The factory original ECU is placed in closed loop, 2. The E-manage basically is telling the ECU that
everything is operating as normal. However the E-Management acts as the middle man communicating to the ECU. 3. The e-Manage itself basically communicates with the
ancilary hardware, and acts as a stand-alone of sorts. Spark and Fuel can be controlled. It has imputs, much like a standalone.

Where as the Apex-i Neo or AFC controllers are really merely fuel correction devices allow people with basic bolt on items to correct
fuel trims, however these are different in that they actually alter / skew the signal the ECU reads. The points of control are far less.

Things you need to be aware of, the e-management or for that matter any piggy back is limited to operate with-in the limits of the
factory architecture. Some management systems aren't as sophisticated and therefore in some aspects more ideal and others are far
more complex then the E-management itself.

You really need to decide if simply not going with a complete tride and true stand-alone is not better then going with a piggy back.
If you were in California, I would physically show you what I mean and so on.

Beyond this you have a few methods to approach engine-management. Some less sophisticated but it gets the job done with the
understood limits and draw backs. The other end of the spectrum are top level engine-management systems, which basically in terms
of sophistication start at like 10,000 USD for the ECU itself, and climb from there.

Isolated Architecture : This is where fuel & ignition functions are controlled by seporate control units. <- This might be an alternative cost
effective direction.

Combined Architecture : This is where a multitude of parameters are controlled, such as variable valve timing, fuel, spark, a number of customizable
mapping all in a single unit. These also require typically customized harness and ancilary sensor / hardware.

Then the line divdes and in somecases blures further.

Regards,
Mick -

PS, sometimes I won't notice someone has messaged me, so PM's are welcomed.