Sooo.....

#1 s4 is 86-88, but the tii didn't hit the market until '87 if im correct. I am now doing all the research on a swap and just want to make sure there is no complication with doing an s4 tii conversion on an '86. That may sound stupid, but I don't know.

#2 What is intailed on doing an s5 Tii in an s4?? I am having trouble finding anything other than "when doing the conversion, stick to the same series" but I know that the s5 was a better series for performance. Don't need a whole breakdown in the answer just a birds eye veiw.

#3 Cosmetics. are s4 and s5 exterior parts interchangable?? Tail lights, front bumper, etc...

Thanks for all the help!!!!

 

should be good to go on all accounts, i'm still a newbie, but for sure yes to exterior, I had a s4 with s5 tail lights

and more body kits and parts in general for the FC are categorized from 86 to 88 when you search for it.

 

#1. Correct, S4 TII into S4 is the simpler option. Some extra work includes harness modification, AFM, pressure sensor, driveshaft, flywheel/clutch.

#2. I don't have much detail on the swap, but you have to source many of the same turbo components and a much more involved harness mod. The increased performance mainly comes from the S5 engine running higher boost than the S4 engine. A boost controller will probably close most of the gap between the two.

#3. As stated above, stock bumpers, moldings, skirts, tail lights (w/ slight body modification) are interchangeable. However, lips and half bumpers will be split up by series.

 

When doing a TII swap into an N/A car, the drivelines also need to be swapped. If you have a TII transmission, but no rear end, you can use a custom driveshaft to make it fit.

The trim piece on the exterior is slightly different between S4 and S5, but its pretty minor.

 

Let me clear up something really quick, my first question. I know what it takes for the most part on a standard s4 na to s4 tii swap, the question was if the fact that my car was built before the tii was in production does that effect a standard tii swap?? Or is there more to consider than on say... an '88. I know mazda made some minor changes after 86 but i dont know if those effect anything im doing.
Thanks for the input though and keep it coming

 

As far as I know, 86 NA is identical to 87/88 NA, so no extra problems because of that.

 

my memory on this may be a little fuzzy, so i won't commit to saying that there was an '86 Turbo in the US. however, i do know that there was a production Turbo somewhere in the world in 1986 because i remember reading the article on it. i think they started production sometime in September/October 1985. the 2 prominent features that stuck with me were the fact that it carried the Aero Package (see the RB Bonneville car) and that it had "GT" stickers on the front fenders where we later saw the "Turbo II" emblazened. come to think of it, i believe the RB car was an '86.

so, as was stated before, there shouldn't be an issue with converting your '86.