k20a2 or k20z1
 

hey guyz, i have a decision to make. i dont know which one to choose to swap on my 96 civic, k20a1 or k20z1. thnx for the help

k20z1!

wrong section
but k20z1 from the rsx-s is a good motor.

Something I found while researching..the link to the article/forum is below..
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K20a is the J-spec ITR/CTR motor.

In australia the ITR uses a k20a2 and in europe the CTR has a k20a2 as well. So there's 2 different kind of Type-R motors...j-spec and non J-spec.

Differences between a z1 and a1 are...

-cams are different on ALL motors. K20a has itr cams (obivously) K20z1 has their own cams that are better then k20a2 cams but not as good as ITR cams and k20a2 cames have Type-S cams (obivously).

The cams in a k20z1 are in between a a1 and a2...but a1 cams are SO mild of a upgrade over a2 cams that z1 cams are even less. They're better cams then the a2 motor but by a extremely SMALL amount, ITR cams > z1. They're different cams...they have different part #'s.

-Bolt ons: K20z1 has a ITR snorkel and catback...that's it. It does NOT have a ITR intake manifold which everyone seems to think they do, nor does it have the header, downpipe and cat. K20a,a2,z1 all have the same throttle body. The k20a3 found in the 02-05 EP3 has a z1/a2 Intake manifold and throttle body. The base RSX which shares the same motor has a dual runner setup like the 3rd gen GS-R and a slightly smaller TB.

-Compression: k20a has .5 more compression due to more material on the k20a pistons vs k20z1 and a2. Rods, crank, bearings, head, block, pan, everything else is the same/identical.

http://www.team-integra.net/forum/display_topic_threads.asp?ForumID=6&TopicID=161488 &PageMsg=Viewing+Common+Topic

thnx guyz