i was just wondering if this process would work and if so would it make the car better?

 

Yeah, it will fit...

 

the more important question is, will the k20a head work in the 06+ civic si? the answer is no. afaik the ctr has a cable throttle, while the si has an electronic throttle.

 

Wonder why Honda decided to go DBW in our cars, when most K20s run cable.

 

gives them more control over the throttle, such as for traction control and emissions. with electronic throttle it's easy to cut the throttle when the wheels are spinning, also the most common theory i've heard about the reason for rev-hang is to lower emissions.

 

The "afaik" saved you on this statement.

What does the throttle have ANYTHING to do with the cylinder head working?

To the OP, you can bolt a K20A Cylinder head on just fine so long as you retail the K20Z3 manifolds and any sensors.

The issue is you will have is that your RBC manifold will NOT bolt onto the K20A cylinder head unless you modify it as the instructions say in here http://karcepts.com/index_files/inst...structions.pdf

The benefit you might gain will be negligible. Pick something else.

 

what does the throttle have to do with the cylinder head not working? oh, i don't know... maybe the fact that the throttle is attached to the throttle body, which is attached to the intake manifold, which is attached to the head? the op didn't ask whether a bare head with nothing on it will attach to the k20z3. if they don't specify, people usually mean the complete head.

 

Oh? Then what would you call this?

A complete cylinder DOES NOT include manifolds, sorry pal you are FULL OF DOO DOO.

A complete cylinder head includes valve train and cams, nothing else captain cool guy.

 

wow, captain cool guy, very creative . no, i'm not full of "doo doo." i guess it depends on your definition of "complete head." if i was buying a "complete head" and didn't get the intake manifold i'd be pissed.

 

Go order a complete cylinder head from Chevy, Honda, Nissan or any other dealer and see if you get the intake manifold with it.

Where is the manifold in these? Advertised as complete

http://cgi.ebay.com/ebaymotors/K20-K...Q5fAccessories

http://cgi.ebay.com/ebaymotors/K20-K...Q5fAccessories

here is the part number for a complete K20Z3 cylinder head 10003-RRB-A02, go ask Honda why the complete head doesn't include the intake manifold.

 

Vladd just stop.

 

Yes Vladd...you're absolutely wrong on this one.

 

Yes Vladd you loose i am using the z3 head on a a1 block and when i purchased the block it didnt come with the head just as if you order a complete head it does not come with the intake manifold as far as the head fitting absolutely it does , its a k son. the dif is the sensors and the intake manifold and with a touch of modification its good to go. now the big ? is why would this be what someone wants to do! there is no benefit from it , because you would still be in the same setting as stock.

 

Because throttle by wire sucks, thats why.

 

well in order to change that out your looking at alot more than just a head, now add in an ecu, all the sensors an intake manifold a pedal assembly, a throttle body, and an engine management since the stock ecu will throw codes even if run in parrallel with the k20a ecu, but hey all said an done you could prob find a complete swap for the same price it will cost you to find all that and change it all out. have fun with that..lol

 

CTR is DBW....

So, I cannot see any reason why it would not work....

 

Here is a pic of the TB

http://www.honda.co.jp/CIVICTYPE-R/technology/throttle/

 

this has been covered many, many times before. and its still no.

 

What is a no? You are talking out of your *** my freind. People say K20A can't be ran in the 2006+ civic and that is a load of horse doo.

The only issue is the intake manifold and it's because a K20Z3 TB wont bolt to the manifold. Why you would want to run a PRC/PRB manifold over a RBC is beyond me but you would have to cut the RBC water port off to fit a K20A cylinder head, something I do in my RBC kits I sell.

You can run ANY K SERIES MOTOR (K23 excluded) you want in the 06+ Si so long as you retain the wiring, sensors and manifolds from your K20Z3. For K24's you will need a CRV mount.

 

thank you my point exactly, if anything the rsx guys want our setups not the oppisite, changing to the older cable throttle bodies would be very costly on our cars as stated above , converting to the k20a head is a direct bolt on with little modification needed , mainly for the intake manifold, so again still a worthless idea to chang out a z3 for an older head , there would be NO benefit from it. all the internals can be changed out the same , if you were to look up cams pistons ect.. all the motors take the same crap..

 

What you would want from a JDM K20A is the pistons, cams, oil pump, and ECU and for the price you'd pay you could get something better and cheaper.

All I'd want internally from an 07+ K20A is pistons, oil pump, intake manifold.

 

Does the fd2 have a higher compression than the fa5?

 

He's alive!!!!! Where you been man?

 

Yes, 11.5:1