hi,
i am thinking of doin a B18C1 swap into my 1990 Teg and I am lookin at JDM engines and see that its 10hp more than the USDM... i read sumwhere that the HP specs for the JDM motor were taken using high octane (like 100 or wahtever is available in japan) and that when we use them here with 91 octane gas they dont have as much power as the specs say and we might as well go for a USDM.

is this true?

 

No.

The USDM has tighter emission controls, so less power is made.

 

will i have emission problems here in the US if a have a JDM motor then?

 

i believe that it is more difficult cuz jdm engines dont have power restricting emission parts that USDM motors do. they usually require you to have these specific parts. i cant remember what they are...too sleepy. can someone help out?

 

anyone know what these specific parts are?
and will having these ensure that i am good to go on emissions?

 

hybrid honda came out with an article over a year ago regarding emission qualifications on JDM motors. sensors and solenoids, phew! there's a few on that list. i can't even remember the site, after this war brainwashed me. anyone else?

 

it says the engines were tested on about a 100 octane gas. that is true-sort of. The us and several other countries use a certain equation to calculate the octane on gas. Japan and most other countries use a different formula. This means that the 100 octane gas used in JDM motors is roughly the same as 92-93 octane pump gas in the us. Like the other guy said, it's because the exhaust is much less restrictive in Japan. This is the difference in power.