I've started my TII swap into my '86 GXL, I'm going to post this in the N/A section as well. I'm going to be running a S4 13BT engine, TII transmission, custom driveshaft to my n/a rearend, most likely an E6k (maybe a LT-8). My question is regarding the chassis (driver's side) harness being compatible with the TII components. I've read that the connection for the pressure sensor and such is different (won't be using that though with the EMS) as well as the alternator connector is different. Will I run into any problems here, can't I just use my n/a alternator so it plugs in with my n/a harness or even just wire in the TII connector if I use the TII alternator? I REALLY dont want to swap that harness!!

My other question is regarding fuel...I'm going to be running a Walbro 255lph fuel pump, I've read something about the TII fuel resistor being different than the n/a one, will I run into any problems using the Walbro and not changing anything else?

Thanks alot for any help!!!

-Marc

 

we have a N/A section?!?!??!@$?@#%#&^%*$

 

Best bet is to do the fuel pump mod anyway. do a search. You'll find one that even specs out the relay you need.

 

why would u wanna change the tranny?

are they not the same?

 

No not even close. The Turbos use a R-type, while the non turbos use a M-type

 

The N/A tranny would snap like a twig. 200-250 hp is about all they can take from what I have heard. The Turbo tranny will run 450 hp all day long without problems.

 

I orginally posted this on another site...

The n/a tranny isn't near strong enough as said above...

 

I'm assuming you mean the running the fuel pump at 9volts during cruise/idle to save on gas?

 

...I know what you said, but who are you referring too. Someone mentioned to me just to wire the fuel pump so it always see's 12volts (hotwire type deal). Any idea how much MPG would be affected. I'd rather be safe than sorry, I know you've done a TII swap Rat, as always any help is appreciated.

-Marc

 

indeed I have, according to Scott's website, N/A's don't have the lowered voltage, however I've also heard that s5's in general lower the voltage at idle/cruise, personally, I just said to hell with it and wired it according to scott's webpage, (http://www.1300cc.com), and it see's 12-13 volts constantly.

 

All FC's except the S4 NA's use the resistor/relay to lower fuel pump voltage at low load. However if you're not using the stock ECU the resistor/relay is not required. Wire direct to the pump via a relay as per the instructions of whichever ECU you use.

 

Stop worrying. I put a 87turboii in my 87n/t car. I kept the original harness's. The fuel pump.....no rework is needed. The 86 sees 12 all day long. That's what you want. YOu don't want or need the solenoid that kicks it down to 9v approx when not in boost conditions. So stop worrying.

You will need to buy a 87 boost controll box. Its located in the passengers side, in the area above and to the right of the passengers feet. The car will run just dandy without it, but you should think about adding it. You just have to string four simple wires. One ground to it, one 12v source of power, one to the knock sensor on the left side of the engine, and one to the ECU. Big deal.
The alternator plug should fit if its a 87 into a 86. NO problem at all.

And the pressure sensor connector is the same. Its the guts of the turbo sensor that is different, but then again you said you were'nt going to uses it anyway.

The most expensive thing is buying a downpipe and presilencer for the conversion, and that's not much, maybe 250 or so from Mazdatrix/RacingBeat/Rotary Performance/ local shop.

You WILL need the turboii transmission mount. Your n/t mount will NOT work on a turbo transmission. Also Mazdatrix will sell you a driveshaft for the conversion all day long.

Some make a big deal about needing a turboii brake booster check valve. Nonsense. All brake boosters have a check valve, including your 86. You just need to find a hose to reach from the back of the throttle body to the original brake booster pipe. What? A buck fifty?

To stay emission leagal you need to think about other things not mentioned.