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1989 FC TURBO II - what are the differences between the JDM and US spec motors?

Old 04-17-18, 03:01 PM
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Question 1989 FC TURBO II - what are the differences between the JDM and US spec motors?

Looking for an engine for my car, since it is a full shell missing only the engine, trans, harness, and ECU. Mine is obviously a US car. Just wondering if I'm going to run into any unforeseen issues if I purchase a JDM motor from a vendor. Thank in advance for the info. I apologize if this has been answered, I swear I used the search feature lol
Old 04-18-18, 06:59 AM
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you'll probably buy a junk engine just a FYI. Engines are identical except emissions, so if you live in a emission state, your still going to have to find a US ecu AND the emission stuff to put on the engine

I believe thats it
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Old 04-18-18, 07:18 AM
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Emissions stuff is all getting deleted anyway since Kentucky and Florida both don't have testing (Live in KY now, will most likely be back in FL in 5 to 10 years). I'm tearing down and rebuilding whatever I end up buying too, although I hope I find a reputable engine source just to be safe.

Thank you for the info!
Old 04-18-18, 07:19 AM
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I'll confirm that it will be a good junker at 50%. So you feel lucky? 99% of the time they, "the vendors" know what they have purchased once it arrived. These motors overseas are gone though tested then re-sold and again re-sold. Either it sat too long or it came off a wrecked car. Neither of these are engines you want like the chassis.

Money wise, (financially) Your stuck between either knowing someone with quality parts and services or, you slowly collect irons and housings.
The way people find out like myself; ended up with people still trying to pull fast ones. Hard choices.
*Most experienced to the younger guys all trying to get a piece sadly off the "customers"*

Last edited by rotor_veux; 04-18-18 at 07:22 AM. Reason: Grammer
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Old 04-18-18, 09:59 AM
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So you think piecing together an entire engine set is going to be financially a better deal than getting one whole from a basically unknown source? I'm all for saving money, I'm just unsure about trying to buy all of that separately. I don't want to accidently buy some s4 stuff, s5 stuff, NA , turbo, and have a Frankenstein motor that will have unforeseen issues.

Its probably pretty apparent now that I need to do a lot more research on this subject, so any direction you can point me will be greatly appreciated.
Old 04-18-18, 05:29 PM
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Its probably pretty apparent now that I need to do a lot more research on this subject, so any direction you can point me will be greatly appreciated.
That's 100% it

Too bad I couldn't stick to thinking like this... If I knew how it worked better, Id have saved myself two times over.

Long story short, If I knew people where going to sell me their lack of skill and foresight, I'd be alot happier.
*Knowing problems and causes, due to lack of parts knowledge."
Old 04-18-18, 07:08 PM
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AWS is omitted on jspec s5. No vac lines running to intercooler either.
Old 04-18-18, 07:11 PM
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Originally Posted by lduley
you'll probably buy a junk engine just a FYI. Engines are identical except emissions, so if you live in a emission state, your still going to have to find a US ecu AND the emission stuff to put on the engine

I believe thats it
This is untrue. You will pass emissions with a jspec ecu. The emissions system is basically identical. I've been running N374 and I haven't had any issues when it comes to emissions testing. As long as everything works you'll be fine.

Last edited by Rotary Alkymist; 04-18-18 at 07:14 PM.
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