Mrsideways

We will see what this engine makes. I'm hoping it makes quite a bit more. But I've learned to just hope it stays running.

Nabu

Anyone else that can shed some light in this topic.

I can't believe that in our community there are only so few people with this swap!!

Aurex

There are a few civics that have F series swaps. Check them out for reference since both F and K series are swapped in the Civics.

Mccormick009

I have no personal info on this topic but I am very interested in how it works out. I am looking at K24 if and when my f22 should tire out.
I can say that Alex from Ballade Sports has a k24 in an AP2 chassis. I don't have all the details but I believe he has handsome oil issues on track. Whether serious or not I'm not sure but he might be a good resource to check with.

Apex1.0

Hmmm, what's the downside to a lsx conversion? Weight I would guess, but the k20 must weigh more than the f20 right?

Love the f20, but if you need something that is dead reliable, cheap and makes more than enough power, consider a lsx swap. K20 is nice but not enough of a step up from the f20 to make it worth it. IMO

HUNTERANGEL121

Apparently an lsx swap is 100lbs less or more than stock. Not sure how accurate that is.

Mrsideways

If I had to do it over again, it would have an LSX or I'd really like to try a 370z swap. But no money and no more time to play with mine. It's going on the dyno in a couple hours. My wife would absolutely love it if I sold it. Issue is with everything else in the car I've got $50k + in it and selling it I'd be lucky to get half that.

s2000Junky

Looks like a step down to me. Add in the reliability headaches and I'm not sure why anyone would bother. The F series is a unique/specific motor for the s which performs better out of the box, seems a shame to neuter the s because one cant afford a decent low mile used F series to swap in.

s2000Junky

Its not, they are 50lb more. I'm not sure how much more the T56 trans is you would want to swap in with the engine, but still the weight of this swap is centralized in chassis and comparable to the weight of a Turbo or SC set up, so its not really a detriment when you also consider the power increase.

Mrsideways

Not entirely true. The K is the next gen motor to the F. It has VTC. But it's surprisingly similar under the valve cover. The Non-FRM cylinder walls make it cheaper/easier to deal with piston changes. It also has VTC and (atleast when I did mine) a lot more aftermarket support. The F has better timing chain setup then the K that's for sure, but the way the F's timing chain is done you can't have VTC without heavy modifications. A K24 with very very light mods will out perform an F with light mods. Bascially a VTC change to 50 degrees and the obvious things needed for the swap (intake manifold and exhaust header) will yield you in the 240-250whp range on an otherwise stock motor with 30-40 ft/lbs more tq then a F22. But from there it gets expensive. The K heads don't flow as well as the F head. So a better head and or head porting is needed. The K rods are not going to like 8000rpm plus and neither will the cast pistons so you need rods and pistons to go beyond. The OEM cams are out of steam at 250whp so you need cams, which then means you need valve springs. So 250 is easy... 260 is building a motor. But 260 and 280 or 300 etc are the sameish price.

At the same time the K series has a taller block and that helps the rod ratio a bunch compared to the F24 stroker. 152mm rod vs a 145mm rod is a healthy difference in a good way.