any difference in the wiring of the usdm vs. jdm swaps into a 6th generation DX for like a GSR setup? just looking at the usdm considering emissions.

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what state you live in? i hope not cali.

cali has some sooper strict emmissions requirements and the refs are getting so good that they can spot JDM swaps pretty fast.

JDM engines typically have slightly higher compression compared to their USDM counterparts. this may be part of the reason why some JDM swaps fail ref tests alot.

I read that the JDM ECU may also play a part. whatever, the reason, check with your local emmissions laws to see whats legal and whats not.

most states require engine swaps to be the same year as the car its going in OR NEWER. not older.

that means if you have an 98, then you should have a 98 JDM/USDM engine swap or newer.

this is part of the reason there isn't much support for b-series swaps in newer EKs. you either get custom engine mounts and try to evade emissions testing or just buy a newer engine, such as the backwards-rotating k20s.

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damm. i forgot to even answer the first part of your question. lol.

yes, some minor tweaking my be required depending on your setup.

this MAY or may not apply to you: http://hondaswap.com/hybrid-eg-ek-dc...x-hellp-80280/

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What do you mean "backwards-rotating k20s?"

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they spin in the opposite direction of D and B series engines.

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Thats what I thought I just don't understand why they do?

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The driveshaft rotates the 'wrong' way.

EDIT: You beat me to it!!!

thats how most engines rotate. the honda motors were pretty much the only ones spinning the way they do.

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Yes, there's a "Replacement for Displacement". Its called Volumetric Efficiency.