I have a 86 NA with a engine that needs a rebuild. Instead i bought a JDM s5t2 engine. Was that a good idea? because i have no idea what im doing

 

yeah see thats not the best route to go xD

mostly because JDM engines arent always inspected and 99% of the engine importers dont warrenty rotary engines because they have a tendency to come bad. Sucks big time but, hey, thats what you get. Eitherway, i would have looked into buying a short block from someplace in the US, Pettit or maybe Rotary Ressurection.

Considering that you dont know what your doing, id honestly, rip the block apart and do a rebuild, simply because you have no way of knowing what those internals are like, so theres a good chance youll drop the engine in and go to start it and it wont run at all.

Case in point, 2 years ago i bought a 13B-RE engine for a rebuild and eventual drop into an FC, BUT when i tore it apart, both housings had 1mm gouges into them and both rotors were chewed up. and both rotors were missing 2 out of 3 of all the corner seals. Basicly that engine would have needed new rotors and new housings before i could even think of rebuilding and considering the thousand i paid for the engine, plus the 1200 - 1300 id need just in internal piece replacement, plus the 1200 rebuild kit, considering all that? would have been cheaper and less hassle to just buy a short block from one of the reputable engine builders in the States.

 

Well, buying a series five turbo engine was probably not the best choice.
So, at this point, you could either put the turbo engine in the car and hope that the engine is in good shape, or buy a N/A JDM engine series four and install it, or pull your engine and have it rebuilt.

Option 1: use the JDM S5 turbo engine. In my opinion this would be the worst option. You sound like you don't have a ton of mechanical/rotary knowledge, and converting your car to an S5 turbo is going to challenge you. I would really think about selling the s5 engine and using the money for options 2 or 3.

Option 2: you could buy a JDM S4 N/A engine. It would be a plug and play type install for you. The big risk is the condition of the engine. There are no guarantees that the engine will be in good shape. A lot of the more reputable sellers will give you a short (30 day or startup) warranty. But, if the engine is bad, chances are you will be out the shipping costs, and you will have to deal with the seller to get it replaced. Not to mention the labor to install, then remove and ship the engine, just to get to do it all over again.

Option 3: Pull your engine and have it rebuilt. If it were me, this is the route I would go. You can go the inexpensive route and have a budget rebuild. Like Kevin Landers. Or you could go the Atkins/Mazdatrix/Pineapple route and have it rebuilt. In the long run I personally think this is the safest. Plus, depending on circumstances it may be just as cheap.

The other possibility is to buy a used engine from someone. If you can get a lower mileage engine, this would certainly be an economical route to take.
N/A engines go very cheap used.

 

So far most of the info is right. You've got an S4 and converting to S5 anything is a pain. JDM engines all come turbocharged, there aren't any NA JDM engines. Sell the JDM engine and either rebuild your S4 NA, buy a remanufactured S4 NA engine, or find a JDM S4 engine. As stated before, those can be tricky, but look up japan2la. He has lots of JDM engines available and can steer you in the right direction. He also compression tests all his engines and he will be upfront with you. Good luck!

 

def not the best choice

 

I wonder. Have any of you ever done a S5t2 swap? thank you didnt think so

 

Apparently neither have you, but all it takes is a copy of the S4 & S5 FSM wiring diagrams to see that series swaps require a lot of rewiring. The simple way is to run a S5 short block with S4 TII front cover/manifolds/ecu, like was suggested.

And if you still refuse to believe it, I have swapped both S5 & S4 TII motors into S4 cars. Don't ask questions if you can't accept the answers.

 

What kind of response it that?
You tell us that " because i have no idea what im doing" and then you question our knowledge?

Yes, I know how to swap the engines, but I thought we were giving YOU advice. IF you don't know what you are doing it is going to be a pretty good learning curve. You don't even know what engine to get for your year car, how are you going to know how to convert to a series five turbo?

 

i think it would be fine if you dont have to worry about emmisions

 

The S5 TII swap into an S4 is a pain in the ***. *Almost* not worth the headache of wiring everything.

You need to make sure that you patch the wiring in the proper places, source an S5 TII ecu, Pressure Sensor and so on so forth...

There's a lot involved in doing a TII swap into an NA. I haven't even begun to list all the drivetrain swap parts you need to get this going.

Not to sound like an ******* or anything, but you really need to do your research before taking on a task such as this...you seem like you just might be in over your head.

 

The funnest thing about this thread is for the ones that said this was a bad route for wakazz that JDM TII engine is now in his RX7 and working perfectly! That bitch smashes!! So much for saying that was a bad route lol. xP Just had to say that. lol