HOZZMANRX7

iTrader: (43)

Ok,

I've done three search's and just can't come up with a conclusive answer. So, I'll open up my question to all that have been through the process of retrofit a S4 TII drivetrane into a NA. Especially as it pertains into a Vert.

What are the reasons I need to, or want to, pull my Verts dash and swap out the MAIN harness (not the ECU harness) with a TII MAIN harness? If it makes a difference, my question is specifically for a low impedance S4 TII set up into my Vert that is (was) a NA high impedance set up if it makes a difference.

Icemark, you out there??

Icemark

When I had the 13BT in my vert, I used the Vert engine harness and modified it by adding a couple of wires and moving a couple of pins at the ECU.

I didn't use the Turbo engine harness, however if you had a Turbo engine harness for a 87.5-88 Turbo, I would think it would be almost plug and play.

I have not tried to use a Coupe Dash harness in a vert.

With the low impedence injectors you will need to use a couple 10 watt/10 ohm resistors (one on each lead) or using a 87-87.5 Turbo engine harness, it will have the provisions for the the resistors already as part of the resistor pack

BigMike85

you know that harness isnt only under the dash... right? It goes from the pass side dash to the gauge cluster, into the engine bay and to all the lights up front. It's called the front harness. The harness for the injectors etc is the emissions harness, and the one for the starter and main fuses under the hood is the engine harness. I am in the process of doing a TII swap into an NA car and the only reason you would want to switch out front harnesses is if you have the turbo gauge cluster as part of your swap and want to use it. Otherwise, I would not worry about changing it.

* As a side note, HAILERS showed me that if you use the turbo emissions harness in your swap, you will want to modify the X-15 and X-16 plugs (they are dark yellow, the ones to the ecu are bright yellow).

**Edit** I dug up the pics that HAILERS posted when trying to help me with my wiring probs.

The red harness is the one you are talking about.


This pic shows the diff. between the connectors in turbo and n/a cars.


Notice on the left pic the (BrR)? That is apparently a 12V source that may screw things up if you do not de-pin it (assuming that you are using a T2 emissions harness and keeping everything under the dash original).

HOZZMANRX7

iTrader: (43)

Since my Vert is High impedance, but my TII ECU is for low impedance, I'm also swapping out the Engine Harnesse and related injectors?

Keeping my Main and Front harness as is, but changing out the ECU, will my Volt Meter still be a Volt Meter?

I intend on keeping my Vert smog legal, so will go to the referee to get my sticker when it's all done. Especially since local proceedure includes visuals.

I assume that doesn't change the answers?

BigMike85

As long as everything is hooked up and done properly, you should pass I guess. Do they have visuals there? Might not pass that if they know the vin shows an NA car. My area doesnt have visuals, so I dont know much about them.

Icemark

The ECU doesn't care what impedence, the injectors are as long as it sees around 15 ohms. All FC ECUs are looking at that impedence.

Yes your voltmeter will still be a voltmeter as long as you do not swap the gauge cluster harness.

And as far as smog, the 13BT is an optional engine in the 88 model year, so any smog station (not a referee) can just put that you have a Turbo motor when they are entering the motor info into the CA smog software and database (for 87-91 they can either select non turbo or Turbo motor). Just get the right underhood sticker for the emissions and you will be set. No need for a trip to the referee.

In fact I just had smog done on my vert, and the guy thought I still had a Turbo motor in and entered it accordingly.

You just don't want to take the car to a smog shop that knows rotaries well. Half the smog guys out there have never even seen a rotary engine except in the training videos for the smog test equipement.

Tournapart

iTrader: (4)

well i plan on doing this soon, but i was thinking more along the lines of using my current S5 n/a motor for the higher compression and going with an FMIC right off the bat (i dont really care for turbo scoops). Whats a good engine management to go with, i wont be doing anything for about a year but its time to start collecting parts and getting a plan. I would like to go with a full stand alone like a haltech or something similar, but i might even go mega squirt and spark if i have the down time available for the car.

you think that my S5 motor with 120K on it in a year (100K now) would be able to handle the boost atleast so i can get the system up and running so i know it works? if so, after, i would rip it all apart and rebuild. By the way my engine runs very strong, no sure on the compression but ill get a tester and do it soon, also, whats the conversion chart for using a regular compression tester to get a proper reading for my rotary compression?

Thanks, sorry for jacking the thread

HAILERS

You couldn't pay me enough money to change out a Front harness. The one in RED in the pictures in a post above. Answer: DON'T

You don't need a gauge cluster from a turbo. Don't do it. The boost gauge in them is not accurate and you LOSE your voltmeter gauge if you swap gauge clusters. A lot to lose and nothing to gain .

I think you need to buy a turbo transmission mount. Just in case you didn't know.

The harness that attaches to the engine and has the fuel injector plugs, is the EMISSIONS harness. Do not put a turboii EMISSIONS harness in your car. It's more trouble than using a non turbo. Leave the non turbo one in place. It's almost plug and play.

As far as the high/low resistance injectors......Preferably put in high in place of the low (now work load there), or if it were ME, I'd buy a solenoid resistor package off a early turbo/non turbo car and use the resistors out of that package. But you can buy those 10ohm, rectangular block resistors from RadioShack for chump change.

Icemark has done this type of a swap....turbo into na convertible. I've never done a convertible or worked on one, so there may somehow be differences I know not about.

57bronco

I am not trying to step on anyones thread, but I'm doing the same swap using an 88 JDM engine. I will try using the 91 vert engine harness. I will more than likely have more questions.

elnots

I have a few questions if yer willing

The 88 turbo engine I got is complete, it's got everything attached to it still since it was pulled out of a wrecked car. All the wiring harness' are intact except for the fact that they were cut at the trunk lines.

Can I splice my N/A harness' to the trunk harness' only doing the pin changes? Or are there more wires? Or should I just leave my N/A harness to attach to the engine and throw away the harness' it came with?

Also, couldn't I dissassemble the U-joint on the turbo tranny that came with the motor and attach the N/A driveshaft to the trans or no? I'm not worried about snapping a driveshaft right now.

Thanks!

HOZZMANRX7

iTrader: (43)

to legitimize my TII swap was no ARB sticker was needed per the State Ref. So, this gives further support to Icemarks comment above. By the way, I tried to get S4 underhood emission stickers from the dealer, and the result was they are no longer availble for either S4 or S5. So, if you want the stickers to tie to the engine, you'll need to get an S4 TII hood for a S4 TII conversion, and S5 hood for a S5 conversion.

Put the detail on my State Ref experience in the west forum's Passing Smog "sticky" for any that want more detail. Key point, the Fullerton Ref (locate at Fullerton Junion College) worked well for this effort:

https://www.rx7club.com/showthread.p...&page=23&pp=15

Bottom line, this effort is DONE!!!!!!!!!!!