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What kind of power out of KA24DE?

17K views 159 replies 37 participants last post by  BarrigaS14  
#1 ·
hey guys, I'm looking into getting a 91+ 240sx coupe. Now from what I see they are pretty badly underpowered in stock form, what kind of power can I expect to get out of the engine without putting a turbo in. (I also don't want to swap in an sr20 in it) It's going to be a daily driver so the turbo will be too expensive to be reliable for everyday use for me.

On another note, where is the best place to get aftermarket 240 parts that are for the KA24DE, most places seem like they only (or mostly) have exhausts for turbo cars.

Thanks!
 
#2 ·
Underpowered? You are 15 for heaven's sake...As for power, anywhere from 140whp to 185whp. Why would a turbo prove to be more unreliable? If ran at low boost on an engine with good compression, and of course with no speed racing, it would prove to be the opposite. Aftermarket parts for the ka24de, phase2motortrend.com, ka24de.com, ebay.com, srswap.com, courtesynissan.com, etc. I/H/E, fuel system upgrade, cooling upgrade, pulleys, lightened flywheel, ECU upgrades are a start, then start looking into valving, porting & polishing, pistons, rings, rods, and other major machining work...
 
#6 ·
InsanityInc said:
turbos are overrated as far as I'm concerned. Performance cams, pistons, header, exhaust and such can get a N/A engine close to a turbo in high-end power, and get MUCH better low end power. Not to mention, if you're going to be driving your car hard, the N/A engine will have fewer problems.
Not necessarily. N/A is good on a high displacement engine, but all in all, How can you get more air in the combustion chaimbers by not forcing it in? The arguement on where power is made really depends on what size turbo you have. Reliability? Look at subarus, they run forever it seems like, and they sell a car that runs at 14.5 psi. Issues with problems usually spawn from poor matinence or operator error. N/A is awesome, but I believe the only way to extract high power from our motors is through forced induction. Plus, if you make 230hp on a KA, I highly doubt it is streetable power. I see your point and respect it though.
 
#8 ·
zero.counter said:
Underpowered? You are 15 for heaven's sake...As for power, anywhere from 140whp to 185whp. Why would a turbo prove to be more unreliable? If ran at low boost on an engine with good compression, and of course with no speed racing, it would prove to be the opposite. Aftermarket parts for the ka24de, phase2motortrend.com, ka24de.com, ebay.com, srswap.com, courtesynissan.com, etc. I/H/E, fuel system upgrade, cooling upgrade, pulleys, lightened flywheel, ECU upgrades are a start, then start looking into valving, porting & polishing, pistons, rings, rods, and other major machining work...
Yeah, seriously dude, underpowered is an understatement. I got mine to 43 mph in a distance of about half a city block WITH the head gasket going; didn't know this until today since I thought that the cooling system was crap, which was, know its the H/G, too. You should get used to a RWD car before you start with wanting to go and hop it up. They are MUCH different than a FWD, plus, if its a stick, you'll have to get used to that while not whipping the ass-end around, especially in the rain.

With that said, search the forums, the internet, and take my advice. We don't want to see another 240 in the junk yard.
 
#10 ·
InsanityInc said:
wouldn't take much to get 230 crank horsepower. Some better cams, high compression pistons, a header, 1.8-2 inch catback, good wires, maybe an intake (I don't know why everyone just throws these on thinking it's free horsepower...) should get you there. I think it would be fairly streetable, too.
You're a loser. I'd like to see you build this KA. I could see 160whp, if you're lucky...And, N/A mods get expensive

A 1000 dollar ghetto 6psi turbo kit will net you anywhere from 200-220whp.

keep your mouth shut
 
#12 ·
red240ne said:
You're a loser. I'd like to see you build this KA. I could see 160whp, if you're lucky...And, N/A mods get expensive

A 1000 dollar ghetto 6psi turbo kit will net you anywhere from 200-220whp.

keep your mouth shut
Ha ha... 6 psi of boost for 220 whp with everything else stock? That I'd like to see.

Do you actually understand the different dynamics of a turbo engine compared to a naturally aspirated one? I'm sure you could find some cheap turbo kit that peaks at a ridiculous amount of horsepower, problem is, you won't have a good range, you won't have any low-end torque, and your car will be essentially undrivable, and won't be any good on a track. Naturally aspirated engines tend to be able to rev higher, have wider torque and horsepower bands, and have no lag. Peak horsepower isn't what makes or breaks a car.

Also, you could probably get 160 wheel horsepower on stock internals in a KA24DE.

You seem to be fighting a battle of wits unarmed.
 
#13 ·
InsanityInc said:
wouldn't take much to get 230 crank horsepower. Some better cams, high compression pistons, a header, 1.8-2 inch catback, good wires, maybe an intake (I don't know why everyone just throws these on thinking it's free horsepower...) should get you there. I think it would be fairly streetable, too.
:rotflmao :rotflmao :rotflmao :rotflmao :rotflmao :rotflmao :rotflmao

InsanityInc said:
turbos are overrated as far as I'm concerned. Performance cams, pistons, header, exhaust and such can get a N/A engine close to a turbo in high-end power, and get MUCH better low end power. Not to mention, if you're going to be driving your car hard, the N/A engine will have fewer problems.
:rotflmao :rotflmao :rotflmao :rotflmao :rotflmao :rotflmao :rotflmao
 
#14 ·
Im not going to say that turbo is underated, but Ive seem some shitty 1000 (or slightly more ) turbo jobs that made ther cars maby go from a 15.5 to a 15.3 in the 1/4. I say that if you get a hotshot or OBX header, 2.5 exhaust w/hiflow cat(custom), and ebay intake, a fidanza flywheel, some good spark plugs and wires i think you MAY be able to kiss some 14s. Take off that AC compressor, get a pully set Take off the cluth fan, run with some royal purple, youll do 14s Garanteed.
 
#15 ·
GunMedalGleam said:
Im not going to say that turbo is underated, but Ive seem some shitty 1000 (or slightly more ) turbo jobs that made ther cars maby go from a 15.5 to a 15.3 in the 1/4. I say that if you get a hotshot or OBX header, 2.5 exhaust w/hiflow cat(custom), and ebay intake, a fidanza flywheel, some good spark plugs and wires i think you MAY be able to kiss some 14s. Take off that AC compressor, get a pully set Take off the cluth fan, run with some royal purple, youll do 14s Garanteed.
So instead of putting the 1000 dollar turbo on, spend that on N/A performance internals, JWT cams, high compression pistons, etc. and you'll do roughly the same. You might not be able to say you have such a high peak horsepower, but peak horsepower means very little if you have turbo lag and a 45 degree horsepower curve, evidenced by the 50-60 peak horsepower gain from that 1000 dollar turbo only boosting your quarter mile by .2 seconds. Turbos have some applications, such as rally cars, but they're not the end-all be-all of engine design.

Oh, and to the people posting unintelligent replies, it's pretty obvious you don't know enough about engines to argue this.
 
#16 ·
Alright, so underpowered for such a light weight vehicle may have been an understatement...

You guys are so split on whether or not to turbo its pretty funny to see all the bickering, lol. But none the less, from the bickering I can extract some useful info in there.

Looks like N/A is still the way to go on the KA, I can try and find where your getting all these parts from (ebay, I presume?). Since "search grasshopper..." is such a big help.
 
#18 ·
InsanityInc said:
Also, you could probably get 160 wheel horsepower on stock internals in a KA24DE.

are you kidding me? there are plenty of people pushing 300whp+/- with ka's.. just talk to the guy from import-autoperformance.com and he'll tell you that you can get 300whp from a ka24de reliably as in for a daily driver on stock internals granted compression is good... or you could talk to the guys who did over 400whp on a stock internals on a ka (i looked for the thread but i couldnt find it, if anyone knows it please post it)... all that said assuming you ment turbo'd on stock internals.
 
#19 ·
calebxmartyr said:
are you kidding me? there are plenty of people pushing 300whp+/- with ka's.. just talk to the guy from import-autoperformance.com and he'll tell you that you can get 300whp from a ka24de reliably as in for a daily driver on stock internals granted compression is good... or you could talk to the guys who did over 400whp on a stock internals on a ka (i looked for the thread but i couldnt find it, if anyone knows it please post it)... all that said assuming you ment turbo'd on stock internals.
it's on nissanforums, i posted it somewhere in the ka threads. yes, he's done 400hp on stock internals, and he has sheets to prove it.



found it
http://www.nissanforums.com/showthread.php?t=58247
 
#20 ·
Everyone seems to go turbo or motor swap with 240's. It's just kind of an accepted thing I suppose. While I understand just how potent a turbo setup can be, I am still intrigued by N/A power(see sig). I would like to see what a KA24DE would do with an intake, header, high flow cat, exhaust, electric fan conversion, maybe the 248*intake cam(or whatever that is that I've seen talked about on here), LSD and some type of computer tune.

I think forced induction and an NA buildup are both legitimate forms of getting more power, but I suspect that getting respectable NA power out of a KA24DE would involve more work than most people would like to do. If I was going to take the time and do it, I'd do all the bolt on stuff I listed above, but use JWT cams, port and polish the head, good valve job, mill the head for some higher compression. If I could get it to around 10.5:1 that would be nice. A thinner headgasket would help bump the compression if someone makes one- would be hard to get a full point in compression just by milling.
 
#21 ·
I was referring to a non-turbo for the 160 on stock internals.

If I was going to take the time and do it, I'd do all the bolt on stuff I listed above, but use JWT cams, port and polish the head, good valve job, mill the head for some higher compression. If I could get it to around 10.5:1 that would be nice. A thinner headgasket would help bump the compression if someone makes one- would be hard to get a full point in compression just by milling.
You've pretty much described exactly what I'm in the process of doing. However, you don't have to worry about milling, as they sell 10.5:1 compression pistons at the stock bore.
 
#22 ·
InsanityInc said:
You've pretty much described exactly what I'm in the process of doing. However, you don't have to worry about milling, as they sell 10.5:1 compression pistons at the stock bore.
Since these motors seem to last forever I personally would try to leave the bottom end alone and gain extra compression by milling and thinner headgasket.

Good luck on your buildup!
 
#24 ·
InsanityInc said:
Ha ha... 6 psi of boost for 220 whp with everything else stock? That I'd like to see.

Do you actually understand the different dynamics of a turbo engine compared to a naturally aspirated one? I'm sure you could find some cheap turbo kit that peaks at a ridiculous amount of horsepower, problem is, you won't have a good range, you won't have any low-end torque, and your car will be essentially undrivable, and won't be any good on a track. Naturally aspirated engines tend to be able to rev higher, have wider torque and horsepower bands, and have no lag. Peak horsepower isn't what makes or breaks a car.

Also, you could probably get 160 wheel horsepower on stock internals in a KA24DE.

You seem to be fighting a battle of wits unarmed.
You are very uneducated on turbocharging a motor. At 6 psi you would EASILY get 200+ WHP. A turbo setup designed around 6 psi would spool incredibly quick and would probably make more power everywhere but idle.

The 91 I just finished with a bone stock 114,000 mile DE motor made more powere EVERYWHERE over the base line runs. At 14 psi the usable power is HUGE. Lets put it this way. My 95 with all the basic bolt ons made 154 WHP at 5800 rpms and 160 lb/ft at 4100 rpms. The 91 KA-T I just finished made 160 WHP at 3200 rpms, 200 WHP at 3400 rpms, 300 WHP at 4600 rpms, and at 5800 it made 377.66.... Yeah... that power curve just sux... NOT!!!! Who the hell would want 200 lb/ft torque at 2700 rpms and 300 lb/ft to 376 lb/ft from 3400 rpms to 6500 rpms....

At 16 psi this car made 404 RWHP and 409 RWTQ. BONE STOCK MOTOR with turbo kit, fuel system, intercooler, and AEM EMS. Motor has never been touched.

NA power is cool. To get 200 WHP out of the KA would take a LOT of research, custom parts, special camshafts, custom intake, custom headers, custom pistons, race gas, etc (read BIG MONEY) To state that this motor would be a torque monster would be a HUGE mistake. You want to talk about peaky power. The NA would be the king. The RPM range your motor would be past 100% VE would be pretty small and at a very high RPM.

You need to get out more.

Ivan
 
#25 ·
InsanityInc said:
Ha ha... 6 psi of boost for 220 whp with everything else stock? That I'd like to see.

Do you actually understand the different dynamics of a turbo engine compared to a naturally aspirated one? I'm sure you could find some cheap turbo kit that peaks at a ridiculous amount of horsepower, problem is, you won't have a good range, you won't have any low-end torque, and your car will be essentially undrivable, and won't be any good on a track. Naturally aspirated engines tend to be able to rev higher, have wider torque and horsepower bands, and have no lag. Peak horsepower isn't what makes or breaks a car.
You seem to be fighting a battle of wits unarmed.
go back to your hondas....i think we can all agree NA 4 cyl's really dont amount to much. throw a t3 on the ka and see just how much it lags. i can guarantee a much better torque band than ur NA build. honestly just dont talk anymore.
 
#26 ·
InsanityInc said:
Ha ha... 6 psi of boost for 220 whp with everything else stock? That I'd like to see.

Do you actually understand the different dynamics of a turbo engine compared to a naturally aspirated one? I'm sure you could find some cheap turbo kit that peaks at a ridiculous amount of horsepower, problem is, you won't have a good range, you won't have any low-end torque, and your car will be essentially undrivable, and won't be any good on a track. Naturally aspirated engines tend to be able to rev higher, have wider torque and horsepower bands, and have no lag. Peak horsepower isn't what makes or breaks a car.

Also, you could probably get 160 wheel horsepower on stock internals in a KA24DE.

You seem to be fighting a battle of wits unarmed.
MAN IS THIS GUY SERIOUS???????????????
A TURBO IS NOT GOOD ON A TRACK???????????
UNDRIVABLE????????????

MY GOD, THATS JUST PLAIN IGNORANT.

Tell you what bro, take $2000 and do everything you can to that N/A stock engine. I'll take that same $2000, throw about 8psi of boost into it, and we'll go to the track and race. We'll see who is seein who's taillights.

oh, and by the way, 220whp on 6psi is easily done and has BEEN done many times by others around this forum.