Destroked K24 Build

[20CiviC02Si]

I am quite interested in building a destroked K24 for my EP3. I love the idea of a higher rev capability and a the much wider power-band. Could do some good on track days and auto-x. However i have no idea on how to go about on this build.... So im here to ask if anyone could help me along this build. What i need is an ideal piston and rod combination, and an overall parts list for this build. My target is 260+ WHP at a 12.5:1 compression so i can still run on 93 oct and switch over to 100 for open track days.

So here is what i am thinking so far:

-ERL K24 Superdeck 1 ($1499.00)
-ERL Modified S2000 Oil Pump ($425.00)
-Castillo Modified F22C Crankshaft ($1100.00)
- K20a2 Head ($1000.00)
- KPRO (Already Have)
- K20a3 5sp. Transmission w/ LSD and 4.7 Final Drive
- Kaiten 9lb. Flywheel
- Exedy Stage 2 Clutch
- (Insert Rods Here)
- (Insert Pistons Here)
- (Insert Camshafts Here)
- and so on....

My goal is to begin this build early in the spring of '08 and have it ready to be swapped in that winter. Now i know this build is going to cost a fortune, however i have already made peace with that. So i am looking for the best parts in terms of quality and performance.

So please help me out!!!

[talonxracer]

You will want the 6spd.

[20CiviC02Si]

6sp will come later. But to tell you the truth, i think that the 5sp will suit my use more. Our typical course for auto-x rarely sees 3rd gear. So wouldn't the longer 2nd gear be better? Im down for getting a 6sp trans, but if it involves more shifts my times will more than likely be slower.

[Lucid Moments]

The other thing you need to consider is the cams you will need to use to make the power you want. You won't get that from stock cams. You also need to consider the incduction and exhaust. You will need a good intake manifold and a good header too.

[20CiviC02Si]

This i know, with this build i am considering going with an ITB setup. I know it'll be a bitch to tune! However my car will no longer be a daily driver once the motor is dropped in. As for exhaust i was considering an Six Sigma Race Header matched to a J's Racing 60RS Exhaust.

These items will be chosen as soon as the motor is completely assembled. I'm keeping my options open, just incase some better header and or intake manifold choices become available.

As for the cams, i am uncertain what to go with. I am thinking about getting a hold of the boys over at Skunk2 to see what they recommend.

[20CiviC02Si]

Again this is the type of input i need from everyone, because i would like to have an idea of what to go with. I am looking for a nice linear power band with minimum spikes in either HP or TQ.

[Lucid Moments]

Oh, as for rods and pistons, you might want to contact one of ERLs dealers, I was talking to someone there a while back on a different subject and if I recall correctly he mentioned having some stuff on the shelf for this combonation. Not sure if they still do though, and even if they do not sure who made them.

[20CiviC02Si]

Will check on this one! My local shop is a ERL dealer.

[Rick Solis]

Originally Posted by 20CiviC02Si

-ERL K24 Superdeck 1 ($1499.00)
-ERL Modified S2000 Oil Pump ($425.00)
-Castillo Modified F22C Crankshaft ($1100.00)
- K20a2 Head ($1000.00)
- KPRO (Already Have)
- K20a3 5sp. Transmission w/ LSD and 4.7 Final Drive
- Kaiten 9lb. Flywheel
- Exedy Stage 2 Clutch
- (Insert Rods Here)
- (Insert Pistons Here)
- (Insert Camshafts Here)
- and so on....

There a couple of ways you can go with pistons. You can either, keep costs down and use a off the shelf piston and a custom rod, or, you can do both a custom piston and rod combination. Ill break down both scenarios for you. i dont really think the custom piston route is 100% necessary unless you are trying go all out with a track only type set up.

With a shelf piston (1.181 CH) and the F22C crank you will need a custom rod. The specifications for the custom rod are as follows:

Center to Center Length: 6.138
Big End Width: .935
Big End Bore: 2.008
Pin End Bore: .8664 - .8666
Pin End Width: .780

A custom rod as I just described, with a shelf piston and F22C crank will put the pistons at - .010 in the hole using the 9.114 deck figure which provides more than enough piston to head clearance when using a gasket with the stock thickness. If you plan on decking the block, you might want to take that into consideration and subtract another .005 from the rod length to keep the piston in that -.010 range. I say this because im considering this will still be a street driven car judging from the 93 octane usage.

This will give you a 1.71 r/s ratio and being that your using a shelf piston, it will definitely help keep costs for the build down.

Sitting -.010 in the hole, using the stock gasket and F22C crank with 93 octane, heres what Id recomend for piston dome volume:

Assuming youd be going 89mm (if you had other plans, let me know and Ill calculate that as well), Id recomend a 8cc dome. This would put you at 12.7:1 using the stock crushed gasket thickess. 12.7:1 is perfectly fine on 93 octane.

Edit: Wiseco just happens to have that exact piston in their catalog.

PN: K573M89

[H1gh0ct4n3]

Originally Posted by 20CiviC02Si

I am quite interested in building a destroked K24 for my EP3. I love the idea of a higher rev capability and a the much wider power-band. Could do some good on track days and auto-x. However i have no idea on how to go about on this build.... So im here to ask if anyone could help me along this build. What i need is an ideal piston and rod combination, and an overall parts list for this build. My target is 260+ WHP at a 12.5:1 compression so i can still run on 93 oct and switch over to 100 for open track days.

So here is what i am thinking so far:

-ERL K24 Superdeck 1 ($1499.00)
-ERL Modified S2000 Oil Pump ($425.00)
-Castillo Modified F22C Crankshaft ($1100.00)
- K20a2 Head ($1000.00)
- KPRO (Already Have)
- K20a3 5sp. Transmission w/ LSD and 4.7 Final Drive
- Kaiten 9lb. Flywheel
- Exedy Stage 2 Clutch
- (Insert Rods Here)
- (Insert Pistons Here)
- (Insert Camshafts Here)
- and so on....

My goal is to begin this build early in the spring of '08 and have it ready to be swapped in that winter. Now i know this build is going to cost a fortune, however i have already made peace with that. So i am looking for the best parts in terms of quality and performance.

So please help me out!!!

Damn this sounds sweet! i Got a k24 in the accord coupe and i would bust if i had this sleeping in it.
May i recommend Skunk2 parts if money and parts are available. If your serious about a track setup with a strong overall power band and high revving all motor then thats what Skunk2 designs all there parts based on. They do alot of R&D to so thats what i would do.

[LSVtecHatchBack]

-ERL K24 Superdeck 1 ($1499.00)
-ERL Modified S2000 Oil Pump ($425.00)
-Castillo Modified F22C Crankshaft ($1100.00)
- K20a2 Head ($1000.00)
- KPRO (Already Have)
- K20a3 5sp. Transmission w/ LSD and 4.7 Final Drive(id go with a 6 speed tranny if its for all motor?
- Kaiten 9lb. Flywheel
- Exedy Stage 2 Clutch
- (IB ultra lite rods)
- (weisco piston)
- (blueprint/ib stage 3)
- SSR or SMSP header
- 3 inch exhaust
- IB ported RBC manifod

[RsxJai]

IBspec ultra lite rods. IBspec/Blueprint Stage 3 cams. IBspec/wiesco pistons + race prepped down to 12.5CR. IBspec ported rbc manifold. IBspec ported head. SMSP header.

If you want to save some trouble and want a 2.2L ready to go you can always buy Brian Crower's stroker kit too. Sorry not trying to jack this thread. Just saying for simplicities sake. Rods with widened journals. Pistons made to your specification. 2.2L (yeah I know it's 2.1something but honda's never even either) stroke capable of reving to 10.5k. ERL stocks them too I believe.

Edit: 11.5k.

[orpheus1120]

Is there anyone who has done a destroked k24?

Surely the wealth of knowledge of this board must have translated into practical useage somehow?

[ImportRacer2123]

Originally Posted by orpheus1120

Is there anyone who has done a destroked k24?

Surely the wealth of knowledge of this board must have translated into practical useage somehow?

The alot of people are waiting for there 2.2 IPS built Motors to arrive...

[orpheus1120]

Surely that's NOT the only route to get a destroked k24 no?

[RsxJai]

Originally Posted by orpheus1120

Surely that's NOT the only route to get a destroked k24 no?

Someone on CRSX has an IPS one ready for sale? Pretty good price too.

[Rick Solis]

Originally Posted by RsxJai

Someone on CRSX has an IPS one ready for sale? Pretty good price too.

So for 3K+ you get a reworked F22C crank, custom JE pistons and custom cunningham rods from IPS?

Whats retail pricing on the 2.2 K20 kit?

[RsxJai]

Originally Posted by Rick Solis

So for 3K+ you get a reworked F22C crank, custom JE pistons and custom cunningham rods from IPS?

Whats retail pricing on the 2.2 K20 kit?

No idea. I thought somewhere around 5k. I liked your posts on Crsx about the 2.2L and how doing it yourself is 2700. The guy is selling 3000 shipped so if you take away shipping costs it's pretty close right? So it's not too bad. Already assembled too.

[20CiviC02Si]

I have only one issue with stroking out the K20, and that is durability and longevity. The whole point is with a destroked K24 it will be able to hit the same RPM's and power numbers with less stress to engine internals. So this is why i am opting for a setup of this magnitude.

[Rick Solis]

Originally Posted by 20CiviC02Si

I have only one issue with stroking out the K20, and that is durability and longevity. The whole point is with a destroked K24 it will be able to hit the same RPM's and power numbers with less stress to engine internals. So this is why i am opting for a setup of this magnitude.

What makes you believe that a stroked K20 would be any less reliable than a destroked K24?