Re: k20a2 head on k24a8

[Mike]

You may be able to tune it with k pro. I'm not sure though I don't know to much about the K series.

[ikethegreat]

You may get a better answer if you post this in the correct forum

[CrackerTeg]

+1 to that. You posted this up in the J series forum buddy. Though now that I think about it, he may not see this thread until it gets moved because he'll search through the K series forum. OOPS!

[timot_one]

Not sure why you posted in the J Series section, but I'll move it to the K Series section for you.  You may want to do a little more research before you actually attempt this.  I'm not sure what you've looked into yet, but it's fairly well known that Cham makes kpro harnesses for K24A4's.  In our conversations, I'm sure that he can make a kpro harness for a K24A8.  I am not sure, but you may be able to use the harness that Hondata makes for the TSX and modify it.

You also need to swap pistons and rods.  If the K24A8 block is anything like the K24A4 block, you can get away with using TSX pistons and rods, or you could go with aftermarket components.  You will not be able to just swap the head without changing your internals.  You probably won't need anything more than better flowing injectors for a fuel system upgrade if you're only doing a head swap with OEM components.  There are more parts, but I can't think of them off hand right now.  But you definitely need to change out your timing chain tensioner, chain, and guides I believe.

[BliNx197]

Tim the a4 and a8 blocks are pretty much identical from what Ive heard and seen people work with on k20a.org and vtecnique you got PM

This is the link to Chameleon's build http://www.k20a.org/forum/showthread.php?t=13887
hes located in NY but Im pretty sure hes got a shop up there, not suggesting it for build purposes but for validity on his post. Either way your going to need a loooooot more than a fuel pump. TSX rods/pistons or some other pistons with valve recesses, rods obviously, RSX-S oil pump if you plan on running Kpro and raising the redline. Then some other stuff like a matching manifold as well.

[timot_one]

You have a lot to learn man.  You'd be better off doing a K24A2 engine swap and running kpro on that.  For the amount of work involved with the head swap, it's not even worth it.  You may as well go for the entire long block.

[Skippy]

I already replied to your topic on G7A...it's not usually a good idea to post the same question on multiple forums because it can introduce wrong information and it gives people like me a headache because I have to retype or repost what I said on other forums to keep my credibility up...

Tim has some good points.  It is a lot of work to do a headswap but there are also some good reasons to do it.  You can acquire parts over time and it will cost less than buying an entire longblock plus the upgrade parts you want.  However, the headswap option should be reserved for people wishing to make more than 300whp.  If you are not well versed with K series engines and just want something with more power, you can straight up swap to a K24A2 and wait for hondata to release an EMS solution for your application.  If you're not happy with around 220whp with a stock TSX motor you can opt for better cams or a blower and that will bump you up considerably.

here is my post from G7A:

Do your research on k20a.org. I'm not sure if a K24a8 has been used in a K24/K20 hybrid yet. I would probably get a K24a4 shortblock and a K20a2 head and build up a motor outside the car. It will cost you less downtime and it's less of a risk than opening up your stock motor. Either way, go to K20a.org and start doing research. There is an extensive special parts list that is specific to both the K24a4 and K20a2 because you'll need certain parts from each engine to complete the build. Nobody here will have the answers for you except for Cham and he's just about as busy as I am these days.

[timot_one]

Try using proper English.  That will help when you want people to take you seriously.

[BliNx197]

hahah be nice Tim! but Skip Idk where the post is but Ive seen people put a 3lobe head on a a8 block. Either way Im willing to bet the only big difference between the two blocks is the pistons, which would have to get yanked out anyways, either way vtecnique like everyone else said do research and did you get my PM?

[BliNx197]

I feel I should know the answer is no but I do remember someone doing this swap with Kpro on Gen7.1 and never really dug into the thread,..

I was wondering could you run a k24a2 with just a piggyback system? Obviously it wont rev to 7200 and have that extra power but JW if it can be done

[timot_one]

It was done by one of the old school Gen7Accord members that hasn't been active for years.  He hydrolocked his K24A4 coupe and got a sweet deal on a K24A2.  He was running it on Greddy eManage.  KPro would be more suitable, but eManage will work.

[BliNx197]

Very cool! Gonna look into this in a few months,.. Dont exactly feel too confident about having a F/I k24a8 w/ 50k+ Miles on it for too long. Next project I guess

[thisaznboi88]

wait you can piggy back the stock ecu to control the vtec and vtc angles using the emanagement?

[timot_one]

You can do it, but it's not recommended.  A piggy back will not control VTC.

[Skippy]

Usually piggybacks can control VTEC, but VTC is something only Kpro can control.