A question about the H22s...

[Troggie42]

hey guys, i searched, and could not find, so i decided to ask.

What are the differences between a JDM H22 and a USDM H22? i know there is more HP and TQin the JDM, and it has a slightly higher compression ratio, but what else is different? also, has anyone tried to pass emissions with a JDM motor, especially in maryland? in case oyu hadnt guessed, i am trying to get all the info i can before i chose JDM over USDM. i mostly want it to be legal and stuff, but if i can get a legal JDM, ill do that.

[myk]

From - http://www.cb7tuner.com/vbb/showthread.php?t=39834

"...Originally posted by fizzbob7(rickyduckworth)


USDM H22A1 and H22A4---4th and 5th gen preludes

2156cc
(92-96)H22A1 and (97+)H22A4 (USDM and black valve covers)
190hp/6800rpm and 195hp/7000rpm (99+ had 200hp/7000rpm)
158tq/5500rpm and 156tq/5250rpm
7500rpm redline on both
10.0:1 compression ratio
87.0mm bore x 90.7mm stroke
92-96 were closed deck and 97+ were open deck
optional LSD

This is our version of the JDM h22a, which has slightly lower compression and less aggressive cams, but basically the same design. As with the JDM h22a's, the decks were closed until 1997, when they were switched to the open design, but also got a different headgasket to compensate for it's less rigid structure.

The OBD II 97+ models got a full floating crankpin to allow for a tighter fit but also made it operate smoother too. The 97+ h22a4 also got an internal coil distributor instead of the external coil setup, but all JDM h22a's are internal coil.

The 97+ automatic transmission equipped h22a's retained the 195hp rating due to a less aggressive computer program, but the manual cars had a rating of 200hp to finally catch up with it's JDM counterpart.

PROS: you can see the engine firsthand since it doesn't have to be imported from japan, possibly cheaper since shipping isn't involved, more powerful than most of your other options and not too expensive.

CONS: less rated power than the JDM h22a, harder to find one with low mileage (japan taxes cars after 30,000 miles because supposedly the engine won't run as clean as intended and rather than pay the hefty annual tax, most will swap it out for a newer motor or a new car completely and a lot are parted out as opposed to paying the tax and registering it for on road duty)"


idk bout the emmisions i dont have to get the test done <3 up north WI.

[NAiL05]

I coulda passed emissions...If i fixed my o2 and my exhaust leak lol.

[Troggie42]

oh, cool, OK, thanks guys! i am thinking about a loan soon. no car payment for me, so ill jsut have an engine payment.

[NAiL05]

Did I say I have a chipped p28 I need to work on my map after that I should be good to pass up emissions also =D.

[owequitit]

According to most mags that have torn them down...1996 was the first year for open deck.