K20Z1/K24 Build

[abez24]

Hi everyone,
Hoping this hasn't already been covered as I did a quick search and didnt find anything
anywyay

Im looking at getting a K24 short block for my 04 Type S K20z1 head. Ive seen on http://www.kmodperformance.com/KMOD-...rt-Blocks.html that there are a few different options and from what ive read they are a reputable business.
Thing is Im not the smartest with these things, and I've never done anything like this. Obviously I will be getting my mechanic to do all the work, what I want to know however, is, will this block be a direct fit with my head? Are there any other parts I should be purchasing? Or does this just fit in, get tuned and go?
I am aware I need K-Pro, I just wonder if there's anything else I need? Or have they already got everything necessary?

I also wonder wonder If my current mods are compatible or not? I have a injen CAI, and fujitsubo rmo1a catback installed, with a toda header waiting to be installed.

Finally I ask what other costs would be involved? Would i need this to be engineered? Or can I just install it and go?

Sorry for all the questions, Its just that its a big build and a lot of $$ to be spent, but a lot of power to be gained

Thank you in advance to the help im sure i will receive.

[DaRKNT]

Afaik, toda header will not fit.

PM Butter or 45SET or Mugsee, they know plenty about K24 and K20.

[abez24]

Afaik, toda header will not fit.

PM Butter or 45SET or Mugsee, they know plenty about K24 and K20.

Oh ok will do thanks

Still will appreciate any discussion here and any tips

[DaRKNT]

Have you had a look on k20a.org or clubrsx?

[abez24]

Have you had a look on k20a.org or clubrsx?

Ive seen a few threads here and there but haven't properly looking around. I guess I could do that aswell. Im just on CITR more often and was hoping to find some Aussie help haha. Hoping there are a few people out there who have done what im looking at doing, and can give me some insight on the build.

[sleepingperformance]

Where are you located if you don't mind me asking?

To do a K frank (k20 head / k24 block) you will need a number of things. Firstly, you will need complete motors of both as you will need the following:

- K24 timing chain (crank to cams)
- K20 oil pump & chain
- K20 sump
- K24 head gasket (recommend buying a brand new one)
- K20 cams & 50 degree VTC (makes better power than the K24 cams)
- K20Z1 engine harness & corresponding sensors
- Haltech Platinum Pro plug & play ECU for K20Z1
- K20 flywheel & clutch
- K20 midshaft

From there you will also need to think about the following:

- RDX injectors
- RBC/RRC/RSP or other aftermarket intake manifold
- minimum 70mm throttle body
- ASP or Speedfactory headers
- 3in exhaust system
- 09 TSX pistons & rods or any other aftermarket bottom end (if you are wanting to increase compression)
- Drag Cartel, Skunk2, Toda, Jun cams (just to name a few)
- Upgraded valve springs & retainers


My personal opinion on it. For the power that you gain and the dollars spent, a turbo kit will be a much better option. Dollar VS kilowatt gained is much higher and standard K series motors can handle decent boost levels before needing to upgrade anything.

For either of these paths, engineering will be required to make it legal (both noise & emissions tests) so think long and hard about what you want from the engine before you go and build one.

If you need further help, drop me a PM

[abez24]

Im in western suburbs melbourne mate
Seems like theres a long list of parts to check off. I understand turbo is a better option but at the moment im just looking at an NA set up.

To do a K frank (k20 head / k24 block) you will need a number of things. Firstly, you will need complete motors of both as you will need the following:

Seeing as I have the complete k20z1, would the bottom end of the k24 off the website i showed above contain all the necessary parts I need to complete the motor?
Or are the other parts I would need?

[sleepingperformance]

There are still more parts that you will require. Also, once you pay for shipping/customs/gst, that bottom end will be close to $5k. Better off building something yourself when you can pick up a K24 engine only for under $1k these days and spend the rest on getting a bullet proof bottom end built.

If you want to go ahead with it, I'd be happy to help you with it and advise what would be the best combination to go

[mugsee]

Obviously I will be getting my mechanic to do all the work, what I want to know however, is, will this block be a direct fit with my head? Are there any other parts I should be purchasing? Or does this just fit in, get tuned and go?
I am aware I need K-Pro, I just wonder if there's anything else I need? Or have they already got everything necessary?

This block will be a direct fit to your head, however you will need a number of other parts that kmodperformance probably won't supply, unless you ask them to. At a bare minimum, you need a K24 timing chain and guides, a K24 headgasket, CRV engine mount and a programmable ECU on top of what you already have/what you can reuse. You'll end up reusing a lot of items from your K20Z1 (oil pump + chain + guides, alternator, water pump, etc)

I also wonder wonder If my current mods are compatible or not? I have a injen CAI, and fujitsubo rmo1a catback installed, with a toda header waiting to be installed.

Your intake and header is compatible however your catback will need to be modified at the engine side to accommodate for the taller K24 bottom end.

Finally I ask what other costs would be involved? Would i need this to be engineered? Or can I just install it and go?

The motor needs to be registered to the car, and technically, in order to do that, it should be engineered. You should also factor in money for a tune.

The costs of bringing in the short block should be ~1.3K landed including taxes. IMO, the additional costs are not that expensive for what you get. Get some quotes locally for the same bottom end to be built to do some comparisons if your concerned about prices.

Will you be building the head?

What is the goal of this motor/build?

Here is some additional reading that you should start looking at: http://www.k20a.org/forum/showpost.p...6&postcount=10

[abez24]

Sweet as thanks heaps mugsee
I think ill try source it from melbourne or atleast try keep it in Australia.
Basically I want the motor to be somewhat powerful but reliable as it is my daily. So Im not looking to go overkill.
Im just looking for some extra power with reliable parts.

[45SET]

Personal opinion.

K20/24 is a lot of money for little gain. If you don't intend on doing cams etc, it's not worth it, and more for wank factor. If you don't want to build it with cams, just put a late model K24 in. I used a 2008 model engine, and these run the better head, which is closer to specs of the K20. These engines are still ~$1k, give or take.

As for costs, how long is a piece of string? With something like this, you'll learn quickly that you can't put a price on it. You won't budget to replace a part, or something won't work. But best case scenario, don't be surprised if you part with around $6k (If you do a straight K24 swap. Maybe more if you are putting it into a DC5S, as you'll NEED an LSD).

But read my build thread for my old car, as I kept a fairly good detailed write up.

[abez24]

Yea its looking like its going to be fairly pricey but it should work out in the long run
I was worried i might need an lsd
Hopefully i can find a good one off a type r
Is there any other mods for the driveline? How does the gearbox and everything else go with all the extra power?

[amant02]

Just slap on Comptech charger and call it a day. K24 build is alot pain for virtually no gain.

[abez24]

Just slap on Comptech charger and call it a day. K24 build is alot pain for virtually no gain.

Lol from what ive seen there is quite a gain to be had
And as much as that would be an easier option I need to keep this strictly NA.
I'm sure there will be a noticeable difference between stock and the k frank

[amant02]

If your staying na, then the z1 isn't the best head to use. a and a2 heads are much better.

In saying that, You already have a z1 in your car atm, guessing.

I would recommend these works for the head if your on a budget.
Ported head, Spec A2 camshafts, valve springs, adjustable cam pulleys.

Gota remember the honda magic happens in the head, the bottom is just a glorified vacuum.