Honda K20 vs K24: Which One is Better?

As we’ve discussed in previous videos, the K-Series is arguably the best four-cylinder engine Honda has ever produced. It offers a massive amount of potential for both naturally aspirated and boosted builds, with massive amounts of aftermarket support. Even with the popularity of the K-Series engine, a lot of people don’t know if they should swap a K20 or a K24 in their car, so today we’re going to break it down and see which one is better.

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[King_Kong_Ek]

Dude, we drive Honda’s, pricing is always an issue 😂😂

[codyc]

The real question... gallo 20 or gallo 24

[griplimit]

I always felt that a K20 is best for boosted applications and K24 is best for N/A applications. K20 has slightly more cylinder thickness which helps block integrity good for lots of boost and revs higher which is good for a wider power band on boost, and the k24 has extra capacity which helps give a meatier mid range for all motor setups and a potential for higher compression due more stroke.

[TrichbeeT]

K20: Im better
K24: Nah, im better
F22: *hold* *my* *Vtec*

[arginpetrosian]

K24 Heads have relatively poor flow, I believe the intake valves are smaller. Also, you guys didn't mention but there's a golden nugget K24 that had a crankshaft with fully weighted counter weights and improved block webbing, as well as other small improvements all around. I'm referring to the 06+ TSX's K24A2. The Odyssey and Element blocks are pretty comparable but the 06+ TSX crank is the superior part. The head also has slightly more aggressive cams but they're still hindered by the lack of flow potential from the valves. Yes the counter weights make the crank a few pounds heavier, but the high end vibration stability is a well worth trade off, plus its not like a good 8-10 lbs flywheel wont counteract the extra rotational mass/ inertia.

If you grab a K20Z1 RSX-S Head and slap it onto a 06+ K24A2 TSX block, you've got the best combination possible. Throw some cams, springs/retainers, Pistons/Rods, along with a tune and 250+ whp is easily possible, if not pretty casual now lol

[vasiliusmaximus]

I would say that are probably the best 4 cylinder engines ever made. Best blend of reliability, tuning potential and price. No wonder they are swapped in everything.aftermarket is also huge for these engines.

[silverrain]

I don’t drive a Honda. I just wanted to learn more lol

[luckyer]

Been wanting to build an ef hatch for almost 20 years. A couple years ago I finally got the car for a good price and just last week I got a salvaged 2013 civic si. Can’t wait to figure out how to get that k24 into that ef. I have a feeling that 205 hp and a 6 speed are going to be amazing in that little civic.

[-gnicE-]

K24's are about to get super cheap in Canada, 2007-11 CRV's rear sub frames are all rotting out and being condemned.

[bobbydelamar]

K24A2. I have currently just installed one in my 1989 CRX. 6 speed LSD transmission. 👍

[jarvis]

The K24 is a taller block due to its stroke. That can be a problem where space is limited. Hood or oil pan clearance can be an issue.

[autocrossstar]

I have a 14 Si and I’ve had B Series cars. A also had a friend who had an RSX-S. I love the low-end grunt of the 24 but the 20 is so much more fun with the more pronounced switch-over and 8k redline.

[chrisparker]

I remember when a k swap just started. I was part of one of the first clubs to have a k20A jdm swap in an 95 EG! It was amazing!

[harryazzole]

Neither, K24 Frankenstein with a K20 Type S head and a 6 speed LSD Type R trans. Ultimate Honda setup.

[boosted_l]

My cousin had a k24 bottom and k20 head, that thing was insane

[BVM]

I'm doing a k20 swap and a turbocharged k24 into Pontiac Fiero's. I am trying to learn all specifics about Hondas. I cant let all the k swapped MR2's have all the fun! These engines have so much potential, its crazy!

[paulstevens]

A K24 with a reflash is a fantastic engine...from 2000 rpm - 7600, there is no let up til it hits the limiter, just pure power...and that is in the heavier accord

[josephzaja]

I drive ek with k20, k24, k24/20. All motor build. K24/20 all day best!! But when you build engine take care of all parts and build. Buy all new parts and do it like factory build. Best gear, tran, k20 gears only 6 speed from k24 and f.d 4.38. Best for street use. Cheers!!

[jeremy]

Great video! The K series are my favorite 4 cylinder engines without a doubt

[crashmanjones]

Love your breakdowns man! Very informative and love your pace and delivery. No fluff or BS. Excellent stuff!