91 non turbo ecu working on my turbo 2 motor for an s5 swap
 

Has anyone heard of useing the na ecu with the turbo 2 motor and it working I recently did the na to t2 swap and my n374 was not working then one of my buddys said that he read somewhere thatt thena ecu would work so I pluged it in and it started idled for a bit then died but idk if that would be a good thing to run my car off of can someone help me

It won't see boost.

Use the Turbo ecu that's meant for the car, even if it starts and runs its not going to run right.

Rotary >Pistons

NA ECU on turbo engine:

1. Won't be able to interpret MAP signal properly
2. Won't adjust fuel trim properly in relation to AFM position
3. Will use too high of injector duty cycle at idle/low load because it expects 460cc injectors
4. Will run ignition timing that is way too aggressive for forced induction

Solution:

Use an N370, N374 w/ rtek chip (Rtek7 ECU Upgrade Detailed Information) or standalone EMS.

Thanks guys I searched everywhere for the forum that my buddy said he read that it worked and could not find it
My n374 ecu wil not start my car proporly wont even idle right and I have read in other forums thatn374s dont work unless chipped is that true or do I just have a bad ecu
I have looked for a n370 but cant find any for sale and dont have enough money to go haltech or any other aftermarket dose any one have any imput on that

Ive heard of some n374s working but idk if mine is blown and rtek says to send the a working computer so how do I tell if mine is blown

You could open the case and look for burnt circuitry, but it's fairly unlikely that you have a damaged ECU. The problem with the N374s is that they don't fire the injectors properly due to an incompatibility issue with US-spec wiring. Details are scarce.

Cool thanks

Also just to add when I turn my key after I try starting it it starts makeing this anoying beeeeeeeeeeeeeeeee noise and the last time I heard it it was cause my computer was blown.
When I plug in the non turbo ecu it dosent make the noise untill after attempt to start it and with the n374 it will make the noise after like a minute with the key turnedto the on postition but not tried stating and then if I try starting it right away it comes on after I done trying to start it dose anybody know what that is

When I attempt to start with the n374 it wont start but with the n351 I have it start but will not idle
So ditital tune says to send them a working ecu so they can chip it so how do I tell if the n374 is blown or not