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Old 04-30-2003, 01:54 PM   #1
S14Kyle
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Boring the KA24DE

Hey, I have been sold on keeping my KA24DE and turboing it, but before I turbo it, I was just wondering, has anyone bored/stroked their engine here? What displacement can you bore/stroke it to? Also, if/when I bore/stroke my engine, where can I get ahold of custom forged pistons? I was hoping just N/Aed alone I could get at least 200hp@crank... A little liberal, but I have my dreams... Also, anyone know some really worthwhile injectors for the KA24DE?
I plan to turbo my engine for sure, just in case I wasn't clear about that, and if it's worthwhile enough, I will bore/stroke it ALSO.

I will appreciate any and all responses to this, even if it's calling me a jackass for asking this question. Thanks guys. Peace!:smoka:
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Old 04-30-2003, 02:22 PM   #2
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Getting that type of power and keeping it streetable will be hard, but possible. An upgrade like that may end up costing ~3k for full rebuild and upgrade. However, the KA is not the best motor to upgrade NA. Most people who build their KA's get about 180 or so. If you are looking for more, you will need NOS. The best route is turbo, there are many turbo kits avail for the KA.. that is the best choice.

Of course, you can always keep it simple and go SR. It just depends how you want to spend your money. If you go SR, you are getting a USED motor and its stock OEM quality. BUT USED.

If you go KA, you are building a forced induction system for an OLD motor with miles on it.

Regardless of which route you go, proper build up should be top priority. That means taking apart the motor and performing cleanup. That is why I havent done any heavy motor upgrades with my car, I am waiting for the right time.. rather than rolling the dice and hoping I get a clean SR.

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Old 05-01-2003, 01:50 PM   #3
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Alright, guess I didn't make myself clear... I meant I was going to bore it ~AND~ turbo it... MY KA24DE only has 26,000 miles, so it's not really old if you know what I mean.
I sort of figured out that the emissions, which is one of my primary concerns, would be a hard thing to get around.
I'm almost dead on that I'm gonna turbo my KA with a FMAX kit, forged pistons, rods, new ecus and a few more things. Thanks for your input
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Old 05-01-2003, 04:32 PM   #4
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i READ SOMEWHERE THAT THE ka IS ALREDY BORED AND STROKE TO THE LIMIT...

Anyone else know anything about this
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Old 05-01-2003, 08:26 PM   #5
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Alright, if that is true, I guess its just time for pistons rods and a turbo kit...
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Old 05-01-2003, 08:51 PM   #6
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i'm sure it can be bored/stroked a little more but i just dont think it would be worth the money involved
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Old 05-01-2003, 08:54 PM   #7
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The engine(KA) already has more displacement then most honda engines already...

Last edited by ghostchild316; 05-01-2003 at 09:31 PM.
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Old 05-02-2003, 12:22 PM   #8
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Finally, someone said it.

Want to make power with your KA24DE? Buy a turbo kit.

Quote:
Originally posted by k6kicker
i'm sure it can be bored/stroked a little more but i just dont think it would be worth the money involved
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Old 05-02-2003, 01:39 PM   #9
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Quote:
Originally posted by old_s13
Finally, someone said it.

Want to make power with your KA24DE? Buy a turbo kit.

Already said I was gonna get a turbo kit... That was my first priority with my 240SX from the start, either SR or KA-T. I don't really know which anymore though...
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Old 05-02-2003, 03:19 PM   #10
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with cold battery side intake
high comp SOHC early year pistons
93 octane
Stand Alone systen w/ TPS no maf needed.
wicked cams
Underdrive pulleys
Headers
Test Pipe
catback exhaust(60mm)

this would bring u to the arena of 200rwhp on a KA24DE.
this is about everything you can do to your KA24DE while keeping it NA. You could also port and polish your head and oversize and 3 angle valve job on your valvetrain, also some lightweight parts wouldnt hurt.
Custom buiilt intake manifold and maybe a bigger Throttle body.

If I were going to keep it NA, I would also get some lightweight wheels, gut the car and lighten it, lightened flywheel, and a lightened driveshaft.

with all that done you would be way faster then a stock SR setup. YOu might even have a chance against SR's with upped boost on stock turbo but anything above 12psi id say you would get smoked in the long run if its on highway especially. On the NA engine your power and torque would be better on the low and and you have no turbo lag.... so a 200hp NA ka24de would be a tad quicker then a turbo 200hp Sr20det.
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Old 05-13-2003, 02:12 AM   #11
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Destroke?

I've read that people have used ka24 cranks to stroke their FJ motors.
Is it possible to go the other way and destroke the KA with an FJ crank?

If you could, you would have a much better rod ratio for boosting the motor...

I've been thinking about doing this, but don't know the engines specs.
You would have to know the deck height, among other things, in order to pick pistons and rods for an apropriate compression ratio.

Please, someone chime in with some info on this...
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Old 05-13-2003, 09:30 AM   #12
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Quote:
Originally posted by old_s13
However, the KA is not the best motor to upgrade NA. Most people who build their KA's get about 180 or so.
i think im gonna make it my mission to build the most powerful ka24e N/A auto w/o NOS in the world. hehe...

injen intake
hotshot header
3" catback exhaust
sr20det injectors
300zx fuel filter
walbro fuel pump
iridium spark plugs
ecu upgrade with faster auto shift and higher fuel flow
electrical fans
port and polished
engine rebuild

any other ideas people? i might be running somewhere in the 14's with all of this if i keep running 94 octane and amsoil synthetic.

i know a turbo is a lot more cost effective but i'd like to see how fast i can get this thing with a "stock" engine. as long as i have this car i'll keep building it up slowly.

hmm i dunno maybe ill just keep it as it is now and get a turbo next year.... still wondering.
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Last edited by mynismo; 05-13-2003 at 10:41 AM.
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Old 08-24-2004, 04:00 PM   #13
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u can do high compression pistons ,cams, cam gears,crank shaft,new clutch (like a center force stage 2strret clutch if it is a daily driver)motor mounts help like nismo ones.and that is all i can think of off the top of my head but i will get back to u if i think of ne thing else ...........speaking of wich does ne one know where i can find a forged crank and adjustable cam gears...getback to me on that ...
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Old 08-24-2004, 04:03 PM   #14
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Re: Boring the KA24DE

p.s. hondas reall do suck ......stick with nissan ...its the way to go
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Old 08-24-2004, 04:04 PM   #15
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look at the date before you post. let old threads die in peace.
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