How to Build a 300HP K24Z Engine

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Published 2019-12-17
Making more than 100 horsepower per litre requires some clever thinking and small tolerances. The K24 engine out of my Honda is a 2.4 liter 4 cylinder that produces only 190 horsepower, which is almost 80 horsepower per liter. That figure can be easily bumped up with the use of forced induction however it complicates things as there are more parts, which means more potential problems. My turbocharged 1.6L MINI cooper from the factory came with more than 200 horsepower, however it isn’t anywhere near as reliable as my Honda engine. For that reason, I’m sticking with a naturally aspirated setup, with upgraded engine components to reach my goal of 300hp. (125hp per liter).

What makes the Frankenstein build so awesome is that you are using a cylinder head out of an earlier K20 that has VTEC found on both intake and exhaust camshafts. It allows the engine to breathe much easier. What makes my build different is I am working with the later K24Z3 R40 engine block (12-15 Civic Si / 08-12 Accord i4 / 09-14 TSX / Acura ILX) and a similar cylinder head that has dual VTEC (K24A2). This isn’t as common or easy as running the better head on a K24A block. It is a bit complicated, however if you do your research, you’ll see why that is.

In this video, I am outlining what is to come, my main goal for the build, and a couple differences between both used engines that I purchased locally. I want to have a complete list of the parts that will be used in this build so that anyone who wants to replicate the build will be able to simply buy the parts and repeat what is to come!

FULL K24Z BUILD PARTS LIST ▶︎ bit.ly/38SH8fd
**it will be revised along the way**

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If you have any additional questions, feel free to send me an email at [email protected]. Be sure to tag me on instagram @milmast with your projects. Thank you so much for watching!! ❤️

#teammilmast #k24frankenstein #builtnotbought

Video Chapters
(0:00) Introduction
(0:55) My Two Different Acura K24 TSX Engines
(1:51) Differences Between Both K24 Engines
(3:32) Main Differences Between These K24 Heads
(5:13) Upgraded Parts for my Build
(6:26) Final Remarks

All Comments (21)
  • @flyboy8282
    THAAAAAAAANNNNNNK YOU!! I swear nobody cares about the 8th gen 2.4 Honda Accord I've been looking for a video like this for years! I bought my 2.4 '08 Honda Accord coupe in 2012 only to figure out there is nothing for it. All the aftermarket company are too cheap to try something like this and they only care about the Civic Civic Civic Civic ugh or the v6 Honda Accord coupe. They completely skipped over the 8th gen Honda Accord 2.4. Thank you man I cannot thank you enough for doing this!
  • @Gage7SLR
    For those of us who don't scroll through all the comments, does anyone know what happened to the project? I was hoping to see the completed build and dyno.
  • @justainereid5
    you are the best at explaining things like B is for Build and i love this project. Just keep going because this project is personal to me. Really need all the help and knowledge i can get
  • @OneNoteScream
    Every forum I've ever seen always says the z3 isn't worth it but I'm glad to see someone putting work into the 8th gen.
  • I could not have asked for a better series for your channel. Really looking forwards to see this build! :D
  • @bennylol4374
    U are one of the only accord coupe people on the platform thank you for showing all of us how to wake up the z3
  • @davel4449
    Best k24 swap channel PERIOD straight to the point information and facts CONGRATULATIONS
  • @drkvegeta
    Finally! I have a 9th gen civic si and I was looking into doing this and I can't find it anywhere, so thank you! Also I made 232hp 183tq on my 9th gen, k24z7 however I wanted to get on my exhaust and intake so I finally find you with all this!
  • patiently waits for dyno video Seriously though, SO much great info in this series, hope it continues soon!
  • @daviddaoust8841
    This is so awesome. Thank you for describing the function of the lobes
  • @kylemiller4774
    Hey I was looking to upgrade my 2008 Accord, like you, I have some mild mods, tune exhaust intake mod and a street flywheel. Am looking forward to seeing this build
  • @RWTFska8te
    You're literally doing everything I couldn't do on my old 8th gen haha. Really hyped for this build man!
  • hey Milam, I have a 2009 accord coupe k24z3 and I'm planning on doing the exact same thing. I'm gonna model my build after yours ! good luck
  • @tyscl9516
    Just to share more technical knowledge about Honda's i-VTEC because I've got nothing better to do. Honda made many versions of their "i-VTEC" systems. The performance oriented i-VTEC incorporated valve lift and timing on both the intake and exhaust side. Engines like the K20A, K20A2, K20Z1, K20Z3, K24A2, and K24A3 have the performance version of i-VTEC. Some engines like the K20A3 and K24A8 only had "i-VTEC-E." Those engines don't incorporate variable valve lift, only a 12 to 16 valve switch over and variable valve timing. These engines usually produce more low-end torque and have better fuel efficiency. However, they don't rev as high and make less top-end power. In addition, their switch over is extremely early in the rev range and barely noticeable. There is another version of i-VTEC that incorporates variable valve lift, but only on the intake cam. Engines like the K24Z3 (like the one in this video) have this version of i-VTEC where VVL only occurs on the intake side. Both intake and exhaust sides still have VTC, so this systems sets itself in the middle of performance and fuel economy. You can generally tell the different K-Series engines apart by the intake manifold cover. If the lettering is red, then the engine has real "i-VTEC." If the manifold cover has black lettering or no lettering at all, it's most likely the "economy i-VTEC." Of course there's the head stamping to go off by too. I'd love to hear more facts from fellow Honda fans and enthusiasts. Thanks!
  • Subscribed. Looking forward to updates! Also: just checked your Google Docs parts sheet, great info! Thank you for providing that.
  • @topgun779
    Can't wait man. Goodluck and have fun
  • @ElMenorLatino
    That's what I'm trying to do!! I want more power. I can't wait to see this done 😎