1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

85 12 for 89 13b.... a new approach

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Old Oct 16, 2002 | 06:00 PM
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85 12 for 89 13b.... a new approach

Well I just got off the phone with pineapple racing (they're in portland) and despite what I originally thought he explanned that with the complete wiring harness, (which i can get from the person i'm getting every thing else for from the 89) fuel injection is not difficult to set up at all.

So now i have also found out that because i have an automatic transmission I will need a new counter balance.

As far as exaust goes... he said I could get a new pipe to mount the 13b exaust manifold to the 12a exaust I allready have.

The last thing he suggesed for FI is that I get a GSL-SE gas tank.

So finally I would appreciate a check of what I'm doing here. So I install the new gas tank and fuel pump. Remove the old engine, strip it to the block. Attach the front cover and GSL-SE oil pan to the new 13b and attach the intake and exaust manifold. Install the engine mounting adapter plate, and drop in the engine. Attach the alternator, and water pump. Add in the wireing harness (he said it should be fairly easy because the one I'm getting is still in one piece. ) Install the new exaust pipe piece, and thats IT?

I'm more than likely missing somthing here, and anyone with corrections/thoughts/ideas would be greatly appreciated.

Thanks again guys. You've given one hell of a lot of help!
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Old Oct 16, 2002 | 06:13 PM
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Rob from Pineapple racing is great. Since you're in Seattle, you may wanna ask your local Atkins Rotary for help as well.
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Old Oct 16, 2002 | 06:13 PM
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you cant install a gsl-se gas tank if you can find a good condition one with everything you need or get a surgetank and high flow aftermarket pump.
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Old Oct 16, 2002 | 06:15 PM
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huh??? sorry i have NO idea what you just said it sounded like I could and couldn't in the same sentence.... could you rephrase that? thanks!
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Old Oct 16, 2002 | 06:53 PM
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yea, that didnt make any sence to me either..
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Old Oct 16, 2002 | 07:23 PM
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You can install a GSL-SE tank if you find one in good condition, one with everything you need (pump, pickup, whatever), or you can use a high flow aftermarket pump and regulator with a surge tank.

I think thats what he tried to say .

~T.J.
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Old Oct 16, 2002 | 08:08 PM
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i second what rotormotordriver just said ... i think rx7passion was just saying that an SE tank is not an ABSOLUTE NECESSITY, rather you could build your own with your tank. that's all.

however, on the wire harness issue, you have to realize that the phrase, "not difficult at all", is totally relative. therefore, be prepared to spend a lot of time trying to sort out what sensors you need, what connections you need to fabricate and so on, and so forth ...

Last edited by diabolical1; Oct 16, 2002 at 08:13 PM.
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Old Oct 16, 2002 | 08:14 PM
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well this might sound dumb... but if I'm pulling it from one car.... then i can place it back in exactly in my car... then shouldnt the only thing I have to worry about is the sensors?
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Old Oct 16, 2002 | 08:25 PM
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lol yeah i had no idea what i just said either but rotormotordriver fixed my grammer for me. what i ment was if the gsl-se gas tank quality and price is too much you can get a surge tank and pump for pretty cheap.
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Old Oct 16, 2002 | 08:32 PM
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ok thats ALOT better, but still about the wireing harness....
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Old Oct 16, 2002 | 08:48 PM
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well all you really need is the schmatics, factory manuals have what you need. find out exactly what year motor.ecu you might be using and get somebody in the 2nd gen forum to give you the factory diagram or a webpage. if you get more along with the project im sure one of us locals can assist you for some malt/hop flavored beverage
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Old Oct 16, 2002 | 08:58 PM
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From: https://www2.mazda.com/en/100th/
the wiring harness will have a couple of left over connectors under the dash and, the dash harness will have one too. its things like power for the injectors, and solenoids, the gauges. you need to make an adaptor to go between the 89 harness and your 1st gen one. the 89 manual is at www.fc3s.org

mike
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Old Oct 16, 2002 | 10:35 PM
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Originally posted by j9fd3s
the wiring harness will have a couple of left over connectors under the dash and, the dash harness will have one too. its things like power for the injectors, and solenoids, the gauges. you need to make an adaptor to go between the 89 harness and your 1st gen one. the 89 manual is at www.fc3s.org

mike
From what I've read, the 89+ harnesses are a royal pain in the ***, even retrofitting them into another 2nd Gen. The 87/88 ones are supposedly much simpler.

FWIW.
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Old Oct 16, 2002 | 11:46 PM
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hmmm does anybody have any kind of photos of someone who as done this.... i would kind of like to know what i'm getting my self into here...
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Old Oct 17, 2002 | 12:07 AM
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Originally posted by hornbm
hmmm does anybody have any kind of photos of someone who as done this.... i would kind of like to know what i'm getting my self into here...
http://my7.rx-7.org/Paul/index.htm
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Old Oct 17, 2002 | 02:59 AM
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Im helping a friend of mine do this swap on his GSL-SE using the factory 90 ecu. If you are going to run the factory ecu you will have to modify a GSL-SE front cover (the 12a front cover is much more difficult to modify) to accept the electronic OMP. Modifying the front cover requires tig welding some metal in a few places and drilling and taping 3 new holes. With out the electronic OMP the car will run in limp mode and there is no way that I know of to trick the ecu into thinking that its still there. This swap is a bit more dificult then my haltech TII powered 1st gen because he is using the factory ecu. As for the wiring we have the complete passenger side of the harness which lacks the harness for the coils which I will have to make. I cant be a whole lot of help with the wiring right now because we have not started that yet. The engine is in the car but we are waiting on his 6 port sleeves from pinapple so that we can install the lower intake manifold,sensors and a ton of vacume lines.
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Old Oct 17, 2002 | 03:27 PM
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can someone tell me more about this "adapter" i would have to find to use the 89 wireing harness?
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Old Oct 18, 2002 | 11:17 AM
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bump
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Old Oct 18, 2002 | 11:53 AM
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From: https://www2.mazda.com/en/100th/
Originally posted by hornbm
can someone tell me more about this "adapter" i would have to find to use the 89 wireing harness?
you have to make it, its not actually all that bad. its things like injector power 12v, the coolant temp sensor, the coils etc

mike
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Old Oct 18, 2002 | 06:20 PM
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what would I need to make it?
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Old Feb 3, 2004 | 07:09 AM
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why does everyone keep referring people to Paul's GSL Rebirth site? ALL he has are a couple pictures of what PART of the wiring harness looks like when its cleaned down... what about what those wires hook up to? or maybe some detail, i dunno.... c'mon, we're not all super experts here
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