F22 crank on K24 (Destroked 2.2L for 10000 RPM) - Honda-Tech - Honda Forum Discussion

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F22 crank on K24 (Destroked 2.2L for 10000 RPM)

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Old 12-07-2017, 03:31 AM   #1
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Default F22 crank on K24 (Destroked 2.2L for 10000 RPM)

Hey people,
This question is for the experts in F & K engines to know what they think about this crazy idea.
I'm investigating for more than a week the possibility of destroked the K24 engine with the F22C crank to increase the Rod / stroke ratio, and increase MAX RPM (+ RPM = + Speed per gear)

My Goals is:

Daily/Track car
Exelent Rod/Stroke Ratio (For 10000 RPM everyday)

K20A2 (EP3) Fully ported and worked (+ - 380CFM)
Supertech valves / springs / retainers etc,etc.
Prayoonto Stage 4 cams (3 lobe)
Costom centerfeed manifold + 90mm TB+ (

K24A1 block with K20A2 head and S2000 oil pump (more cheep) (in my country dont have a K24A2)
12.8-13.0 Compression Ratio (Only 93 octane with a good tuning)
Modified F22C 90.7mm crank 800-1000$
Costum 156.00mm rods (total = 0.035mm (0.014in) piston to deck height and 1.72 Rod Stroke Ratio)
Arias/Wiseco/CP K24 pistons (88mm) for 13.0 comp ratio.

As I have researched enough, the F22C crankshaft has to be modified.
Snout / Chain gear / Crank pulley / Flywheels to fit the K20/K24 flywheel etc,etc.

Things that scare me:
Total crank lenght can cause more or less end play clarence than expected.
The fact of K24A1 dont have oil jets (Thats possible install oil jets in K24A1 ?????)

Stock Sleeves vs Darton Sleeves
This would be one of the main indecisions because the K24A1 has 99mm crank and as this increases the rod / stroke ratio with the crankshaft F22C (90.7mm) I will be reducing the stress provoked on the wall of the cylinders in relation to the stress caused by the 99mm crank, but on the one hand will increase stress by pulling stock sleeves + 300WHP and 100000 RPM

So the question is: stock K24A1 sleeves will be able to withstand the + 300WHP and 10000 RPM safely (even with a higher rod / stroke ratio), it would be better to go with Darton Sleeves for disclaimer of consent.

I hope you can give me your feedback on this project and give your opinions on this crazy idea.

Your Opinions:
May result
May be a failure

This project is distinguished by the difference
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Old 12-07-2017, 05:15 AM   #2
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Default Re: F22 crank on K24 (Destroked 2.2L for 10000 RPM)

Stock K series sleeves are beefy as hell. Jeff Evans and others have routinely pushed them north of 700+WHP reliably, they have the best OEM Honda sleeves out of any other 4cyl block that I'm aware of.

Personally I'd just save all this trouble/uncertainty and go with a sleeved H22/F22, but this is an interesting concept. There are a lot of things you'd need to worry about and consider for this build, but the strength of the sleeves definitely should not be one of them.
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