2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

ecu n/a to fd3s

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Old Feb 12, 2009 | 10:31 PM
  #1  
rx7vadim's Avatar
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ecu n/a to fd3s

If i deside to turbo my n/a can i swap for fd3s ecu/harness/injectors also crank pulley. ?

itll ditch afm, cheaper then stand alone, good for 250whp.
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Old Feb 13, 2009 | 09:51 AM
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From: Mesquite, TX-DFW
If that is even workable, I am sure everyone else would agree with me when I suggest getting a standalone system. You can get a haltech that plugs directly into the factory harness.
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Old Feb 13, 2009 | 12:56 PM
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No.

-Ted
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Old Feb 15, 2009 | 12:46 AM
  #4  
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Originally Posted by need RX7
No.

-Ted
why not,

im not sure if the pulley is swapable but everything else is.

i could put a fd3c intake manifolds on my 6-port if i wanted to.
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Old Feb 15, 2009 | 12:51 AM
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because No


lmao jk
maybe if you swapped everything but why?
stock **** should be good for 250hp anyways lol.
and if your planing to build up numbers , you obviously have the money for turbo = should also have money for proper stand alone.

get the fd intake manifold setup and mate it. reported nice gains when you do it properly with a fmic.

good luck! make us proud!
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Old Feb 15, 2009 | 10:53 AM
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It's a ridiculous idea. You would need to swap on the REW front cover and triggers. Not sure how that effects the water pump but I'm betting it would require the FD water pump and pulleys.

The effort to figure out the wiring would be a bit crazy. You'd need FD ignition coils (which are generally considered vastly inferior to the 2nd gen coils) as well as all of the FD sensors.

By the time you've sourced the parts and made it work, you would have been far better off with a cheaper standalone which you can actually tune.
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Old Feb 16, 2009 | 01:20 AM
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Yea , better with standalone.
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Old Feb 16, 2009 | 07:03 AM
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You do realize that FD's don't even run the stock FD ECU? The stock FD ECU will lean out risk blowing your motor with much more than a catback, plus you will need to install resistors in all of the emissions solenoids so you don't throw a code.
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Old Feb 16, 2009 | 09:33 AM
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Originally Posted by rx7vadim
If i deside to turbo my n/a can i swap for fd3s ecu/harness/injectors also crank pulley. ?

itll ditch afm, cheaper then stand alone, good for 250whp.
You can almost do this. Get an adapter from Banzai Racing and buy a Power FC for a 3rd gen. It'll plug right into your stock harness. If you have an n/a harness, you will need to swap a couple of wires around to make it like the TII harness but this isn't hard. This should do what you want.

I would not try to use the stock 3rd gen ecu unless you have a 3rd gen setup in the car. The reason being that it's map based and you are not going to have anywhere near the same tuning requirements with a turbo on an n/a engine as a 3rd gen engine does. It may start but you have VERY high odds of blowing it up the first time you get on it. That kind of defeats the purpose of using it in the first place. You can't just swap the ecu and injectors and expect it to work. A map based system MUST be tuned to a specific setup and unless yours matches that of a stock REW engine and turbo setup, and it won't, it's not tuned properly. Even running the same amount of boost isn't going to make it even. Just don't try it. If you insist on using a 3rd gen style ecu, the only thing you should even remotely be considering is the adapter with a Power FC.

The other option which may better benefit you is to run an RTEK ecu for your car. It is tunable. It's basically a chipped stock ecu that you can now tune which is actually quite nice. However if you intend to go turbo you need to use a TII ecu as your starting point and then make the appropriate changes to the harness. This would probably be your best option. Don't worry about it still using the air flow meter. They are eventually going to have this deleted. Besides if you are going to turbo an n/a engine, get any idea of 400 hp out of your head (assuming it was in there at all!). You'll realistically be getting somewhere around 250 hp whether you like it or not and an RTEK still using the air flow meter is quite adequate for this purpose.
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Old Feb 16, 2009 | 11:48 AM
  #10  
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Originally Posted by rx7vadim
If i deside to turbo my n/a can i swap for fd3s ecu/harness/injectors also crank pulley. ?
No, the FD ECU is the speed-density type which is specifically tuned for the stock FD engine, turbo, intake, intercooler, exhaust, etc. The more your setup varies from the stock FD, the more out of tune it will be. Even the FD owners must buy a fuel controller once they significantly change the configuration of their car.

If you want to save time and money, just leave the engine NA.
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