# K24 Hatch
**URL:** https://forums.speedlife.net/t/k24-hatch/253838
**Category:** Builds
**Created:** [August 10, 2010, 5:17am UTC](https://forums.speedlife.net/t/k24-hatch/253838 "2010-08-10T05:17:33Z")
**Posts on this page:** 20
**Page:** 3
### Author:  [@dkid15](https://forums.speedlife.net/u/dkid15)
#### Post date: [August 10, 2010, 2:23pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/41 "2010-08-10T14:23:06Z")
> [@Mafdark"](#):
>
> I’ve heard that’s not true… can anyone confirm that?
Its been proven, however most of the time the gains come from switching from 25 to 50 degrees max vtc.
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### Author:  [@LKSi](https://forums.speedlife.net/u/LKSi)
#### Post date: [August 10, 2010, 4:35pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/42 "2010-08-10T16:35:49Z")
I finally make an informative post and it gets disregarded
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### Author:  [@big\_red](https://forums.speedlife.net/u/big_red)
#### Post date: [August 10, 2010, 5:02pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/43 "2010-08-10T17:02:23Z")
this car is real clean. well done
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### Author:  [@Mafdark](https://forums.speedlife.net/u/Mafdark)
#### Post date: [August 10, 2010, 5:08pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/44 "2010-08-10T17:08:59Z")
yea, tough to sort through the bullshit to find it.
> [@Boy, 5, doused in gas, set on fire by masked men](https://forums.speedlife.net/t/boy-5-doused-in-gas-set-on-fire-by-masked-men/34245/6):
>
> tsx motors are relatively hard to comw by and the accord and crv motors have economy vtec. The k20 heads are easy to find… Have 50 degrees of vtc adjstment stock… Larger ports…and are made for top end power.
That’s exactly what I would guess… however I would also guess that the k24a2 head would outperform the k20a2 head on a k24a2. …therefore the only time that it is advantageous to swap the head is on the other (accord, CRV) K24s?
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### Author:  [@LKSi](https://forums.speedlife.net/u/LKSi)
#### Post date: [August 10, 2010, 5:15pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/45 "2010-08-10T17:15:00Z")
The limiting factor on those heads is the 25\* of VTC. However, the K24 has a 99mm stroke… so Honda played it safe. RSX cam gears can be swapped for extra degrees or the TSX gears can be notched. The guy I bought the J from made 300whp on a K24A2 head on an Accord block without much issue. Like I said, TSX motors are kinda hard to come by and the best ones (08+) are still pretty expensive.
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### Author:  [@dkid15](https://forums.speedlife.net/u/dkid15)
#### Post date: [August 10, 2010, 6:01pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/46 "2010-08-10T18:01:31Z")
I just noticed that this car only has 11.7:1 compression… Are the valves flat face? I think 12.5:1 could have easily been done on 93 octane.
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### Author:  [@Hooked\_on\_240](https://forums.speedlife.net/u/Hooked_on_240)
#### Post date: [August 10, 2010, 6:41pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/47 "2010-08-10T18:41:25Z")
LOVE the interior
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### Author:  [@imported\_hybrdthry91](https://forums.speedlife.net/u/imported_hybrdthry91)
#### Post date: [August 10, 2010, 7:27pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/48 "2010-08-10T19:27:53Z")
> [@How did you pick your career?](https://forums.speedlife.net/t/how-did-you-pick-your-career/34229/34):
>
> the interweb told me so…
>
> or do you have comparative dyno graphs so we can stop going round and round?
you are the only one going round and round you asked why we answered. i thought i gave you a very thorough answer as to why the vtec system is different on the k24 accord/crv motors. i forgot about the 25 degree VTC limit on the tsx motor. the stock pistons might hit the valves with more VTC from the factory. i think the k20a2 head does flow a bit more anyway.
all in all its cheaper to just build a k24/k20 than buy a TSX motor + k20 cam gear and build. also you have to consider a lot of people have a stock k20 swap in the car before they build a k24/k20 so they already have a k20 head and can pick up a block for cheap 400-600 and build.
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### Author:  [@Mafdark](https://forums.speedlife.net/u/Mafdark)
#### Post date: [August 10, 2010, 7:31pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/49 "2010-08-10T19:31:21Z")
> [@Local Evo Crash](https://forums.speedlife.net/t/local-evo-crash/34226/93):
>
> you are the only one going round and round you asked why we answered. i thought i gave you a very thorough answer as to why the vtec system is different on the k24 accord/crv motors. i forgot about the 25 degree VTC limit on the tsx motor. the stock pistons might hit the valves with more VTC from the factory. i think the k20a2 head does flow a bit more anyway.
>
> all in all its cheaper to just build a k24/k20 than buy a TSX motor + k20 cam gear and build. also you have to consider a lot of people have a stock k20 swap in the car before they build a k24/k20 so they already have a k20 head and can pick up a block for cheap 400-600 and build.
your post was one of the few informative ones, but I thought you combined both the K20s and k24s into the same group.
anyway, if its that cheap for the block, a complete K24a2 swap is what, 4-5k… that does make sense. Does the K24a2 block bolt up to all the k20 heads and transmissions without major mods?
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### Author:  [@LKSi](https://forums.speedlife.net/u/LKSi)
#### Post date: [August 10, 2010, 8:42pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/50 "2010-08-10T20:42:35Z")
For the K24A2: RSX-S oil pump, plug oil passage, and go I believe. We did that set-up in Murrdog9000’s car. Transmission is bolt up.
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### Author:  [@Jiggsy](https://forums.speedlife.net/u/Jiggsy)
#### Post date: [August 10, 2010, 8:47pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/51 "2010-08-10T20:47:45Z")
> [@this is why i hate cats..... DEATH KITTAAHH!!!!!!!!](https://forums.speedlife.net/t/this-is-why-i-hate-cats-death-kittaahh/32994/44):
>
> For the K24A2: RSX-S oil pump, plug oil passage, and go I believe. We did that set-up in Murrdog9000’s car. Transmission is bolt up.
yup the oil passage next to number 3 main you have to pull a aluminum squiter with a wood screw and plug it with a bolt
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### Author:  [@Jiggsy](https://forums.speedlife.net/u/Jiggsy)
#### Post date: [August 10, 2010, 8:49pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/52 "2010-08-10T20:49:22Z")
oh and you have to mod the pump to fit the tsx block
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### Author:  [@Murrdog9000](https://forums.speedlife.net/u/Murrdog9000)
#### Post date: [August 10, 2010, 8:54pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/53 "2010-08-10T20:54:03Z")
I want dis motor
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### Author:  [@Jiggsy](https://forums.speedlife.net/u/Jiggsy)
#### Post date: [August 10, 2010, 8:54pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/54 "2010-08-10T20:54:08Z")
> [@what do u think about this house??](https://forums.speedlife.net/t/what-do-u-think-about-this-house/34119/129):
>
> your post was one of the few informative ones, but I thought you combined both the K20s and k24s into the same group.
>
> anyway, if its that cheap for the block, a complete K24a2 swap is what, 4-5k… that does make sense. Does the K24a2 block bolt up to all the k20 heads and transmissions without major mods?
heads bolt right up to same head gasket to i think. and if your gonna do that setup do an 08 tsx exhaust cam with a z1 intake cam i believe is a pretty good setup
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### Author:  [@LKSi](https://forums.speedlife.net/u/LKSi)
#### Post date: [August 10, 2010, 8:56pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/55 "2010-08-10T20:56:40Z")
That is correct… TSX head gasket was used.
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### Author:  [@SDP](https://forums.speedlife.net/u/SDP)
#### Post date: [August 10, 2010, 9:44pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/56 "2010-08-10T21:44:54Z")
Woah.
The tsx motor is pretty much the best bang for the buck and the head flows great. Like Lance said, the main limiting factor is the 25 degree intake advance. We used a K20A2 head because we already had it ready to go.
I just tell people to get a complete TSX motor from a junkyard they make tons of power reliably without doing any internal work… Accord/crv/element engines are plentiful and cheap but for a few hundred more you can get the far superior (out of the box) tsx.
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### Author:  [@cazwrx187](https://forums.speedlife.net/u/cazwrx187)
#### Post date: [August 10, 2010, 9:47pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/57 "2010-08-10T21:47:40Z")
D-Series\>\*
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### Author:  [@SDP](https://forums.speedlife.net/u/SDP)
#### Post date: [August 10, 2010, 9:48pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/58 "2010-08-10T21:48:51Z")
word
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### Author:  [@Turbo\_B18C\_EJ6](https://forums.speedlife.net/u/Turbo_B18C_EJ6)
#### Post date: [August 10, 2010, 11:09pm UTC](https://forums.speedlife.net/t/k24-hatch/253838/59 "2010-08-10T23:09:23Z")
nice work guys, 260whp all motor is sick :excited!
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### Author:  [@Synapse\_Motorsport](https://forums.speedlife.net/u/Synapse_Motorsport)
#### Post date: [August 11, 2010, 5:11am UTC](https://forums.speedlife.net/t/k24-hatch/253838/60 "2010-08-11T05:11:55Z")
> [@The Latest On Bass Pro](https://forums.speedlife.net/t/the-latest-on-bass-pro/34240/13):
>
> I just noticed that this car only has 11.7:1 compression… Are the valves flat face? I think 12.5:1 could have easily been done on 93 octane.
This setup was designed for roadracing use on 93 octane, in a 40 minute session alot of heat is built up, this just gives a nice cushion. We also designed the setup around having the largest powerband we could, without spinning the engine to the moon. The k24’s live well below 7800, over that for prolonged periods we have seen alot of problems.
Morgan
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