SonofJacob316

Are there any K20A in the states or do we have to import them?

From what I have been reading the K20A and K20Z3 are basically the same engine except for a few modifications?

Does anyone know what exactly those modifications are and can they be done to the K20Z3- or does the drive by wire prevent it?

king06

iTrader: (1)

First thing that came to my mind



But seriously if you have the money, build it.

Kidnkorner

You won't find a definitive answer because you won't find anyone that has or will do it. Build the Si

It's plausible to build one if you can copy the parts from the vehicle but this would require the company knocking off the parts to have the actual parts to be copied in their possession. Build the Si.

For you to be able to import this vehicle legitimately will require you to work with a registered imported who can petition the NHTSA. You will have to spend thousands of dollars on parts and labor converting emissions and safety to US standards. You would also have to post a bond in the amount of 1.5 times the vehicle's dutiable value until such conversions can be completed, plus the normal duty customs would charge you. Build the Si.

I fail to see how this topic is specifically related to the K series engine, this should have been posted in GDD or the 06+ Civic forum. Build the Si.

NHTSA eligible vehicle importation list
This list shows you that these bad *** RHD Honda's you see floating around that really aren't legitimate despite them being registered.

NHTSA Vehicle importation regulations

NHTSA Grey market vehicles

NHTSA Importation FAQ

SonofJacob316

[QUOTE=
I fail to see how this topic is specifically related to the K series engine, this should have been posted in GDD or the 06+ Civic forum. Build the Si.QUOTE]

I know, my bad. My question started out asking about major differences between our K20z3 and the K20a that is in the RR, but I kept editing the question becuase as I was serching a lot of the qustions I had were answered.

Thanks for pointing that out.

You seem to know your stuff, so let me ask you, what are/is the difference between our engine, the K20z3, and the K20a? From what I have been reading the engines seem to be pretty much the same except for cams, pistons, and various other modifications.

I also read somewhere that the type R in Japan is the Si in the states, but I finda that hard to believe, espesially since track times of the ep3 civic type R were faster than the dc5 integra type R and the engines are different.

hawaiiancb74

not enough of a differance to make the purchase, build the si engine, and enjoy, with k series there is no real reason to go jdm, because we can make **** faster with usdm parts.

ALLxMOTOR EG

You should work with what you have.

GUILOTINE

K20A has a different head/cams/ and higher comp. pistons than the K20Z3
totally different motor

k20coupe

How are the heads different?

Kidnkorner

The cylinder head in the 07+ JDM K20A is the same casting as the USDM K20Z3 but since the specs aren't widely known about the Mugen RR no one knows if there has been any machine work to the head. My bet is it's stock.

The rumor mill has it was or is a 2.2, but here is an article in SS Mag.

http://www.superstreetonline.com/fea..._rr/index.html

The JDM K20A in the Type R has 11.2:1 compression, I'd imagine it doesn't have the balance shafts, the manifold (RRC), and exhaust itself as well as more aggressive fuel and ignition maps.

For the money you'd spend on the RR you could build a much more potent K20. Besides the RR would never be a car I'd want to daily drive unless every where I went there was a garage or armed guard standing by.

Do a Canadian CSX conversion and build the existing motor, you have some nut swingers for sure.

k20coupe

Have you tried h motors online I'm sure they will probably have it

Kidnkorner

if you want a factory fresh 07+ JDM K20A long block you can contact without getting raped contact TMI AutoTech @ http://www.arielatom.com/

Nikos

I just called them and they dont sell the engine on its own. You have to buy the car too.. 65k

Kidnkorner

Wish I could have kept the email because as they were starting to take over they said they would. Oh well.

GUILOTINE

Different casts. The water neck on the K20Z3 head is way different than the water neck on the K20A/A2/Z1.
I had both heads at the same time and the actual head ports on the intake side had a slightly different shape too.

07SIcpe

hmm my buddy imported a k20a and built it up for his 00 civic si. I'm not sure on cost but built up he dynoed at 283whp and 200 ft/lbs tq (on a humid day). We don't live too far from King Motorsports, he may have had them order it and build it. I would say check out kingmotorsports.com and give them a call

Kidnkorner

But we aren't talking about pre 2007 K20's we are talking about the 07+ JDM K20A and the K20A in the Mugen RR, and the castings are the same the K20Z3.

SonofJacob316

Good post- and feel you on the armed guard part LOL!

GUILOTINE

The OP never specified that

Kidnkorner

Um yeah he did, you just came to the conversation AFTER he edited his original post.

I wish I had quoted his entire post instead of the portion.

Kidnkorner

SonofJacob316, you may use K20A/A2/Z1 K24A2 on a plug and play level, so long as you retain the use of sensors, wiring, and DBW throttle system from the K20Z3. If you want to retain the use of your RBC manifold it will have to be modified to fit the cylinder head of the pre 2007 K20A, K20A2/Z1.

If the manifold from those engines suit you you will have to have a throttle body adapter fabricated in which there are none available on the market.

SonofJacob316

OK- that sounded like Latin to me- I'm going to have to have my buddy translate what you just said thanks for the post though.

Kidnkorner

you have to transfer the exhaust manifold, all your K20Z3 sensors over to the engine youd be swapping in and youd have to keep the drive by wire throttle body in order to maintain a plug and play set up, if you use a pre 07 JDM K20A, USDM K20A2, K20Z1 engine you will have to cut off the water port on the K20Z3 manifold so it will bolt up to those cylinder heads.

SonofJacob316

I see- thanks for breaking it down star.

Que From SD

And there you have it.

ENDYN

We do 4-5 CNC ported K Series heads per week. The ports in the K20A2 (RSX) head are significantly different from the Civic versions, with considerably more port volume on the intake side.
As far as quality goes from a core-shift standpoint, we much prefer the USA-cast Z3 heads over the JDM pieces.
If the two heads are CNC ported for use on a road-racing 2-liter, pick the Z3 head every time. If the head's going on a larger displacement combination, the JDM head will work fine, as the increased port cross-section will "cover-up" the casting's core shift.