Honda / Acura K20a K24a Engine Forum banner

k20z3 in 2008 Si - hit list for 10,000 rpm

50K views 43 replies 12 participants last post by  mucter  
You need

Custom crank
Custom rods
Custom pistons
Custom Header
IPS K10 cams or better
Quality Intake manifold (built to suit)
Quality head work and valvetrain
S2000 oil pump or dry sump setup
High quality clutch and flywheel combo

enough money to build 2 incase it doesn't last long...

Probly want a K24 block with a really small crank and some real long rods... You should try and get in touch with one of the builders Nikos mentioned. This kind of motor isnt built with off the shelf parts, every part needs to compliment the rest of the build. There for it is best to have someone who knows what they are doing spec out all the parts and assemble the motor to there specs and tollerences...

Your part may just be installing it when it arrives.
 
Well, that's no fun at all.
I'm sure you could pay someone about the same amount to provide you all the parts and have the block prepped and you can take a wack at assembling it all yourself.

Just dont expect to be buying a bunch of off the shelf parts and randomly put togther some combo and expect it to make power in the 10k range...

The motor you are talking about is a race engine, even if it is 12.5:1 and tuned on pump gas making power that high is going to take a well designed race engine... It's going to be loud, unreliable, and a head ache to maintain. For the same power as you could have from a bigger stroke lower revving OEM style motor that would cost you half as much... So if being different and revving to 10k is worth it have at it...

I would love to see a build like this, but i wouldnt want to daily drive it
 
Hmm,... feel free to tell me Im wrong,.. but since the f20s stock redline is 9k i think itd be alright to assume aftermarket shelf pistons for it would be able to rev slightly higher than OEM ones, so could a k24 or slightly overbored k20 block and f20 shelf pistons accomplish this? obviously with custom rods tho,.. just throwin ideas out there!

Just because you can rev something to 9k or higher doesn't mean it is going to make power... You need a short stroke and long rod setup to make power in the real high RPM range. So you are talking about a modified or custom crank, and custom rods. if you are going to do that why buy a shelf piston? Someone who knows about building engines, moreso than even I do, would get a custom piston with a raised wrist pin, custom ring package, custom skirt package, etc...

If you try and cheap out on a build like this or even just cut corners you will end up with a setup that may be able to rev upwards of 10k, but it probly wont make power that high and probly wont last long either...

There is a reason not many people have built motors like this... Although it would be cool and can be done for the right amount of money, you can get the same results for less money with a bigger stroke lower RPM motor with different gearing...



Don't get me wrong I like the idea of a 2L K that can make power to 10k and still have decent low RPM power because of the VTC and displacement. And if I had 10 grand or more to blow on just a motor build I would probly build one, but only if I knew I had the money to do it right the first time... There are so many things that come in to play when you are talking about building a motor capable of sustaining these kinds of RPM's, everything needs to be taken in to account because nothing in these motors were designed to push the envelope that is being discussed...