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Guest Message by DevFuse
 

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what dohc heads will fit on a '91 NA 2.2?


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11 replies to this topic

#1 Nug

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Posted 05 June 2004 - 11:01 PM

I'm looking to bump up the horsepower on my VW project. I was wondering if heads off of a 2.5 or something would be compatable with my '91 NA 2.2L engine. Any suggestions?

#2 Legacy777

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Posted 05 June 2004 - 11:59 PM

Any particular reason you want to go DOHC?

The big issue is most if not all of the us spec DOHC heads are from the ej25. If you swap heads it will reduce the compression ratio.

#3 Nug

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Posted 06 June 2004 - 12:03 AM

I "heard" that the DOHC heads flow better. I'm just lookin' for easy hp.

#4 Dr. RX

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Posted 06 June 2004 - 12:33 AM

The DOHC head off of a JDM EJ20G will work.

#5 Hondasucks

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Posted 06 June 2004 - 02:28 AM

There is an article on legacycentral.org about it, the added flow of the 2.5 liter head is not enough to warrant the trouble putting it on. But That is just the 2.5, I have no idea abotu the JDM heads Corky was talking about, for all I know they will just bolt right on.
I have a set of EJ22 heads I'd sell, you could prolly have those ported and polished for less than it would cost ya to get a set of those heads Corky was talking about. They have a fresh valve grind on them, but somehow one of the valves got lost, but I have the other valves....

#6 Dr. RX

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Posted 06 June 2004 - 10:11 AM

Both the early EJ22 and the JDM EJ20G engines are closed deck engine, so the cooling holes line up, all of the DOHC engines that came to the US are either semi-open or open deck engines and the cooling holes will not match.

#7 Legacy777

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Posted 06 June 2004 - 11:09 AM

ONLY the EJ22T was closed deck. The n/a EJ22 1990-1994 legacies were open deck.

#8 Nug

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Posted 06 June 2004 - 11:33 PM

Do these engines agree with nitrous oxide?

#9 Dr. RX

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Posted 07 June 2004 - 07:00 AM

Josh, I'm confused, if only the EJ22T was a closed deck, that the engine in the 92 Legacy that I replaced head gaskets on must have been an EJ22T, although the VIN doesn't state that. It was a Plain Jane EJ22 with and auto tranny, the block was a closed deck.

#10 Legacy777

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Posted 07 June 2004 - 07:53 AM

Corky,

All the documentation and pictures I've seen say that the EJ22 n/a motor is open deck.

Was this 92 made in Japan or the US?

#11 Dr. RX

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Posted 07 June 2004 - 01:35 PM

The 92 was a USDM.

#12 Legacy777

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Posted 07 June 2004 - 08:24 PM

hmmm....that's very interesting......




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