Because verts sold everywhere but the US were turbo

 

Up until recently all I ever heard was an ECU swap was a must even for low boost. Now I see posts from atleast 3 people saying they use n/a ECUs. Is there anyone else using n/a ecu also? Can some of you tell us what's in your set-up. I mean like s-afc or maybe a rising rate fpr or what?

 

You can use an s-afc, with or without a rrfpr, though the stock FPR sucks ***.

 

Are you saying that my 1991 vert ECU is the same part number as a 1991 Turbo II ECU? I dont understand why Mazda would do that if they had N/A ECU's made for the N/A cars. You would think running the fuel and ignition maps for a turbo on a N/A would make for an extremely inefficient vehicle. If that is the case, then wouldn't I see gains from swapping the turbo ECU in my vert for a N/A ECU?

 

No, it's not the same part number. But it works just fine as a tII ecu, or so it's been said. It allegedly has both maps set in it, and I guess the pressure sensor/afm are what decide which it uses.

 

I need to do more research on this topic. I was always under the impression that the vert engine was identical to the other N/A 7's. If the engines are the same, I need to find out why they would use a turbo ECU in the vert. If the N/A ECU was optimized for an N/A engine, I don't understand why I should be running an ECU which was optimized for a turbocharged engine. This is really messing with my head.

 

hmmm... so the ECU will switch maps depending on if you are boosting or not? This sounds like a great ECU.

 

Sure, the 1988 convertible ECU, N338 can work in an FC turbo.
So how does the N338 know it's a turbo engine when you still got the NA pressure sensor?
You do realize that the NA versus the turbo FC3S engine harness is different right?

Did you expect you can just change the engine and keep the NA stock ECU and wiring harness and expect everything to work safely?


-Ted

 

So you just plugged a Kouki FC3S turbo ECU (N374) into the Kouki FC3S non-turbo wiring harness, and everything is working fine?


That one scares me.

"Sometimes it's better to be lucky than good..."



-Ted

 

To put it simple, either run a full tII ecu/harness and run very little boost, or run a n/a ECU with a S-AFC, or, the best option, go standalone.

 

Well i went to a turbo specialist around the 10th of july and he told me it would be better for me to just buy a turbo engine or a turbo car.. either way.. i would need some cash for that... right now i'm trying to find a cone air filter.. but dont know where to start.. Then i'll look for the t2 engine.. with wire honiss... (that was told to me by my mechanic)

 

The ECU for a N/A is not the same as a T2. When the car is under boost the N/A ECU doesn't know what to do. The tendency of the N/A ecu is to advance timing. The T2 is to retard timing. The ECU for a N/A works with vacuum, the T2 recognized boost.


My buddy is running a 89 T2 with a n350.

Yes he is, however he has his retarded to make up for when it boost.


I am running a 91 N/A turbo with a N374 just fine. No EMS, no S-AFC.

The N374 works fine at low boost (which is what I am running). A better set up would be a stand alone.

DO NOT think that the verts ECU will run a Turbo fine because it WON'T!

 

The verts in Aus/nz/japan or whatever, had the option of turbo, hence the t2 ecu

 

im not changing the engine, im adding a turbo

 

I ran fine with the N326 ECU and an S-AFC. Timing was stock....However, there's a reason I am waiting for my Microtech in the mail.

 

Sorry, you're wrong.


-Ted

 

=] Yay.

 

RETed

I will give you my N353 so you can install it in you car. Unless you retard the timing it will detonate and not last you a week. Even retarding it, at boost with high RPM it will detonate.
Seen it, done it. That is why I run a N374.

However is anyone wan't to follow you advise, it is fine with me. It isn't my engine or my money!

 

We've run the N338 (1988 convertible US-spec) ECU in a 1987 Turbo II and a 1988 Turbo II with no problems.
This was recommended by Donnie Peters in the now defunct Sun Auto.
We've run the N338 ECU up to hit fuel-cut (which it did) and then up to 12-13psi under boost.
If it didn't react like a turbo ECU, the motor should've killed itself.

All you said is...
"DO NOT think that the verts ECU will run a Turbo fine because it WON'T!"

Which you did not specify which ECU nor which year vert you were talking about.
Thus I pointed out the 1988 convertible N338 ECU has been successfully used on Zenki Turbo II's no problem.


-Ted

 

Is there a difference between runing a TII block/car/harness etc with an NA ECU vs running an NA block/harness/etc with a turbo added and using the NA ECU? I thought that all verts had a different ECU than the other NA models

 

????????

 

So you saying with all that work i put into my 7.. sell it to get more power? i would try to save up to get one.. but in the mean time i want to get it fast as i can. w/o major engine work... (the cheap way)

 

Turboing the 6-port really isn't a cheap way to get power.

 

im not to familiar with the ecu's.. where can i get a N374 from.. i know a junkyard.. but i need to know what im lookin for.. and is it easy to install?

 

I cant find the f*ckn 5th and 6th ports!! and i was told to just change my intake.. but it runds about 189 bucks.. for the cone filter and pipes..