I am building an FC to run a 13b-rew, the engine is in and half dressed (incase your wondering it only takes 30 minutes to R&R stock 13b-rew twins in an FC).

The final product must be street legal, (or quasi street legal in CA).

I will be using the stock ECU to get through the smog ref, I have worked out most of the issues related to doing this.

After the car gets reffed, it will have a 3 inch downipe with 2 metal cats welded in, all smog controlls (no egr as its a 95), and AWS parts will be present but not functional.
A big FMIC, BNR stage 3 turbos, a Big street port, and scaloped rotors, all REW parts, save RE (13B Cosmo) irons, and an HKS intake.

Yes all of these mods, save for the internal porting and use of non us engine parts are street legal for a non obd 2 car even in CA.

Now that you have the backround, here is the issue and the plan.

How do I controll it all?

I have a haltech E8 and was considering trading it for a PFC.

But what if I hook the haltech into the OEM harness using a patch harness by T ing off some of the sensors, (some will be left in place and new wires will be run to alternate sensors such as MAP, and a few others. The injector and ignition driv ers will then be grounded out through the apropriate resistors, to allow the stock computer to think its running the car, the haltech will be running only the injectors, ignition, turbo's using claudio's simplified sequential instructions, and BAC.

Will this work, will the computer continue controlling the smog gear.

Also I don't care if the computer throws a perpetual CEL, I have an easy fix for that.

EDIT: I would like to eventually make 365 WHP on 91 octane with water, or 400+ on racegas + water. Mostly to be driven on 91 octane.

 

so what I am wanting to do is run the haltech in parallel with the stock computer.

I searched around and found numerous refrences to it bieng done mostly long ago (2001-2002) and several refrences to doing this in order to run a standalone with an auto tranny and keep the hold feature. Even one refrence to doing this for emmision purposes.

There was no real data, as in lessons learned.

anyone have any thoughts.

 

Um, hello, this post says how to do it with a stand alone, 4 solenoids, 2 relays and 2 or 3 outputs.

https://www.rx7club.com/forum/showthread.php?t=547998

 

That parts not what I'm woried about (turbo controll) I am wanting to retain the stock ECU to controll the 6-7 odd emmisions functions that arent really related to the engine running. Thanks to your post turbo controll is good.