engine swap on 240sx

[chivistamex]

I want to know what kind of engine swap can I do to my 1998 240sx. Is the sr20 a good engine. How much would an engine cost for my 240.

[Greddypacked]

RB25 Skyline engine if you have the dough. That's for mad powa.

[HiPSI]

ohhhhhhhhh shittttttttttttt, no you didn't.


please, for the love of god, just learn how to search the internet. there is more info on this question out there than you can possibly comprehend, it's all opinionated, and that's all you'll get here instead of concrete info

www.google.com

[yudalicious]

I want to know what kind of engine swap can I do to my 1998 240sx. Is the sr20 a good engine. How much would an engine cost for my 240.

the 240sx sucks, and all the engine swaps you can get are weak.. I'd strongly suggest you sell it and buy another car that's faster... the 240sx is a 16 second car in the 1/4 mile, even if you spend the money to swap an engine, it's still gonna be only a mid 14 car, just sell it, it sucks.

[PSINXS]

240s suck. i want a buick.

[1439/2000]

240s suck. i want a buick.
Me fucking too. :D

[down_shift]

Swap in a B16.

[PSINXS]

nwo you're talking jay. exactly what i was thinking when i posted that.

[sebastianHoff]

you should put an rb20 in it...
and then kill yourself.

[EmotorsportsE]

MMMM GNX, I do love the Cyclone too, nothing like a factory turbo pickup that will run 12's stock. SR's a good motor, RB's are good motors, best reccomendation is to jump on a 240sx messageboard and search, you'll just start alot of trouble asking this sort of question on this forum. If you have the money go RB26, or SR20 if you want to drift, or rb25 if you can't afford the 26, or RB20 if you're on a budget and want a swap with 190hp stock. Or build your KA and boost it, we're building 2 now shooting for 800+.

E

[HalfBaked]

KA24E!

Hell yea.

[1439/2000]

nwo you're talking jay. exactly what i was thinking when i posted that.

That's my dream car. I wanted to buy one after the g20, but GNX's are like 40k. :cool: Ehh one day.

[HiPSI]

you'll just start alot of trouble asking this sort of question on this forum.



correction.... ANY forum.

[1439/2000]

correction.... ANY forum.


Yeah its a dumb question. It wasn't in 94. But today there is the internet. Search it, use it.

Scoop him up while he is still confused and put an rb20 in his car quickly before he knows what hit him.

[The Yousef]

h22a4....nuff said :goodjob:

[HalfBaked]

Yeah its a dumb question. It wasn't in 94. But today there is the internet. Search it, use it.

Scoop him up while he is still confused and put an rb20 in his car quickly before he knows what hit him.

Well if he searches the internet he will realize that the rb20 is handsdown the best possible motor you can put in a 98 240sx.

[CARBON GST]

I know this is what you guys are always getting all fired up about, but it seems to me that you can make more power with an RB without working the engine as hard. Am I right? If so, then what are the downfalls . . . weight/agility?

[SleepingTalon]

Actually you cant make big power on an RB without massaging the motor. All the pistons in those motors are JUNK, and yes, that includes the mighty RB26. Each has its drawbacks, one way or another.

[sebastianHoff]

I know this is what you guys are always getting all fired up about, but it seems to me that you can make more power with an RB without working the engine as hard. Am I right? If so, then what are the downfalls . . . weight/agility?

maybe you missed something, putting an rb20 into anything besides an s12 or maybe a z31 is a complete waste of a good car. you know what even putting an rb20 into an s12 would be wrong, since a redtop botls straight in and makes more power.


Actually you cant make big power on an RB without massaging the motor. All the pistons in those motors are JUNK, and yes, that includes the mighty RB26. Each has its drawbacks, one way or another.

actually your wrong, you can make 300whp on an rb25 with a ball valve and a fmic. its not a good idea but you could do it. in fact there was an rb25 making like 700whp and the guy hadnt even touched the motor yet. as for the 26 how dare you say such things. the guts of that bad boy are good to like 600+whp, the turbos arent but everything else is.

[Tracy]

Dammit. Here we go again.

[xXnimbusXx]

*sigh* hahaha another round in the "I hate 240" match. This is hilarious.

[XBLG20]

Actually you cant make big power on an RB without massaging the motor. All the pistons in those motors are JUNK, and yes, that includes the mighty RB26. Each has its drawbacks, one way or another.

funny coming from a guy with a 4G63

[Annihilation]

the 240sx sucks, and all the engine swaps you can get are weak.. I'd strongly suggest you sell it and buy another car that's faster... the 240sx is a 16 second car in the 1/4 mile, even if you spend the money to swap an engine, it's still gonna be only a mid 14 car, just sell it, it sucks.


Stock 240sx runs 15.5 at the track in a 1/4mile
Go check up the specs...Car and Driver

I've done 15.4 in my previous 93 240sx with Hicas

[HalfBaked]

actually your wrong, you can make 300whp on an rb25 with a ball valve and a fmic.

I know of a local car with an sr20det with stock t25, fmic, exhaust, and boost controller.

Made 300whp.

[SleepingTalon]

maybe you missed something, putting an rb20 into anything besides an s12 or maybe a z31 is a complete waste of a good car. you know what even putting an rb20 into an s12 would be wrong, since a redtop botls straight in and makes more power.



actually your wrong, you can make 300whp on an rb25 with a ball valve and a fmic. its not a good idea but you could do it. in fact there was an rb25 making like 700whp and the guy hadnt even touched the motor yet. as for the 26 how dare you say such things. the guts of that bad boy are good to like 600+whp, the turbos arent but everything else is.

Actually you're wrong. Let me know when you wrench on any of the above motors because I've got 3 motors apart, and the pistons with busted ringlands to prove it. I'll post pics if you'd like! 600+whp on a 26 is bullshit power. Whats the big deal about 600+whp when supras make 800whp on the stock motor? What I'm simply telling you is that the pistons are JUNK in the RB motors, and that's not a "claim" its a FACT. The rods are great though. They're nice and short/stubby from the super short stroke, so that part of the motor is fine. Please call some of the tuners in AUS that I work with, and they'll tell you the exact same thing. I'm not talking making power on the stock shit. I already know the 25 can make 300whp on the stock setup, it's been done to death! Infact, Dan just did one a few weeks ago that did that very same thing! It's nothing new. I tune these cars all the time and I know what they're capable of. That's pretty interesting claims on the 25 considering the pistons are cast and are complete junk, so I wanna see this "stock" 25 motor making 700whp, LOL. Lemme guess, all he has is headstuds and a headgasket, right? LOL. The standard pistons will not take the kind of boost levels needed to attain 700whp, I dont care how much fuel you have in it. Please...I love to hear the bullshit claims people make. I wanna see people put up or shut up. As a matter of fact, I'm gonna post a thread on the Skylines forums titled "Stock RB motor good to 700whp/522rwkw?" and see what kind of responses I get from everyone, this should be interesting...

[SleepingTalon]

funny coming from a guy with a 4G63

Wow, I'm not sure what the fuck that statement was supposed to indicate, but OK, I'll go with that. I am in NO WAY saying the 4G is superior/inferior. I tune all sorts of cars all the time, and after the amount of time I've put in working on this stuff, I pretty much have gotten a feel for what the thresholds are of most stuff. That's all. Nothing less, nothing more.

[BTLFED]

funny coming from a guy with a 4G63

This coming from an asshat with a G20....or did you get rid of it to jump on the 240 bandwagon?

George has probably forgotten more knowledge than you know, so just do us all a favor and STFU. :slap:

[BTLFED]

actually your wrong, you can make 300whp on an rb25 with a ball valve and a fmic. its not a good idea but you could do it. in fact there was an rb25 making like 700whp and the guy hadnt even touched the motor yet. as for the 26 how dare you say such things. the guts of that bad boy are good to like 600+whp, the turbos arent but everything else is.

Oh, another bench racer. The internet doesn't harness the truth all the time, so maybe you shouldn't live by it. :rolleyes:

[Nopaintsls]

wow.....

[Tracy]

funny coming from a guy with a 4G63

I think it's pretty wrong to assume that just because a person owns a particular car that they have no knowledge of other cars. We don't own a Honda, but I assure you that we work on them all of the time. This goes for Lexus', BMW, Vipers, Corvettes, NSX's the list goes on and on of cars that we work on and have knowledge of without owning them. Not a personal attack BTW:), just a response.

[AFSil80]

I love these 'I got a 240 and I wanna swap in a xxxxDET, is this good/make me cool?'

Christ, I learned to quit asking tech questions on local boards years ago. Not that nobody knows, but there's no better place to go for tech info than tech specific boards when searching online.

[HiPSI]

I know of a local car with an sr20det with stock t25, fmic, exhaust, and boost controller.

Made 300whp.


i'd like to see a 300whp stock T25 car. that dyno graph would be hilarious. pushing the stock T25 that hard is almost as retarded as an RB20 swap.

[BTLFED]

i'd like to see a 300whp stock T25 car. that dyno graph would be hilarious. pushing the stock T25 that hard is almost as retarded as an RB20 swap.

I saw the car dyno with my own eyes.....he's not bullshitting, and you know I'm the first to wave the BS flag.

[Tracy]

I saw the car dyno with my own eyes.....he's not bullshitting, and you know I'm the first to wave the BS flag.
I think I saw it, too. Didn't I, Chris?

[HalfBaked]

i'd like to see a 300whp stock T25 car. that dyno graph would be hilarious. pushing the stock T25 that hard is almost as retarded as an RB20 swap.

I don't have the graph for that run as my clutch started slipping. But as you saw, plenty of people saw that dyno. The car makes the power smoothly and it doesn't die off or anything.

[Tracy]

I don't have the graph for that run as my clutch started slipping. But as you saw, plenty of people saw that dyno. The car makes the power smoothly and it doesn't die off or anything.


oK THEN i DID SEE IT.

[HalfBaked]

It was the sexiest dyno ever.

[HiPSI]

I saw the car dyno with my own eyes.....he's not bullshitting, and you know I'm the first to wave the BS flag.


never said it didn't happen, i wanna see the mountainous peak of power before it falls back to 250whp ;).

[HiPSI]

I don't have the graph for that run as my clutch started slipping. But as you saw, plenty of people saw that dyno. The car makes the power smoothly and it doesn't die off or anything.


very interesting.... something doesn't add up then unless the T25 on your car is magically different or something. i've seen 300whp peaks on T25's, but the little T25 compressor just can't maintain enough air flow at higher revs to keep that power level up there for long. how much boost was run?

[SleepingTalon]

I dunno, it really wasnt under all that much strain to be honest. It was right at about 18psi, maybe 19 for a split second. It did it rather easily too. That car is actually detuned, it can make more. Matt, the dyno chart is in the computer over at the shop. You're exactly right, as soon as the clutch started to slip, the boost was turned down. I dont quite remember how much boost it actually left with, but it was still pretty damn stout! On a side note, even my 20g didnt hold all its power all the way to redline, so I would never expect anything even remotely close outta the stock SR turbo. It's like when I tune a car with a big 16g, they make pretty much the same power/power curve as what Matt's car is makes/is capable of making, but it doesn't have a chance in hell of holding it all the way across the board. I undestand what you're saying though.

[HiPSI]

I dunno, it really wasnt under all that much strain to be honest. It was right at about 18psi, maybe 19 for a split second. It did it rather easily too. That car is actually detuned, it can make more. Matt, the dyno chart is in the computer over at the shop. You're exactly right, as soon as the clutch started to slip, the boost was turned down. I dont quite remember how much boost it actually left with, but it was still pretty damn stout! On a side note, even my 20g didnt hold all its power all the way to redline, so I would never expect anything even remotely close outta the stock SR turbo. It's like when I tune a car with a big 16g, they make pretty much the same power/power curve as what Matt's car is makes/is capable of making, but it doesn't have a chance in hell of holding it all the way across the board. I undestand what you're saying though.


i too own an SR and was running the stock T25, which is why i find it odd to say the least. my car at 14psi on it's best runs would muster ~240whp and had a big falloff after about 5000rpm due to it not being able to keep up with the airflow demands of the motor (that was with the boost holding perfect all the way to the limiter). i really don't see a 60whp deficit being made up with 5-6psi difference on a T25, especially when you're already well outside it's efficiency range and somehow making that power loft and hold. the power of that car sounds way more indicative of something like a BigT28. just seems like that "stock T25" may be stuffed with some goodies he didn't know about?

[HalfBaked]

Hey, if I bought a motor with a t25 with t28 internals I'd be more then happy...

But I doubt that happened. I bought it from a local guy who even said it was a stock avenir t25.

[SleepingTalon]

i too own an SR and was running the stock T25, which is why i find it odd to say the least. my car at 14psi on it's best runs would muster ~240whp and had a big falloff after about 5000rpm due to it not being able to keep up with the airflow demands of the motor (that was with the boost holding perfect all the way to the limiter). i really don't see a 60whp deficit being made up with 5-6psi difference on a T25, especially when you're already well outside it's efficiency range and somehow making that power loft and hold. the power of that car sounds way more indicative of something like a BigT28. just seems like that "stock T25" may be stuffed with some goodies he didn't know about?
Hmm..I dont know. I'm sure Matt could answer that question better than me. If I recall correctly, it wasnt just throw some boost at it, and fuel tune, there was timing worked in there at some point. It wasn't holding 300whp all the way to redline, that's for sure, but it did infact make 300whp. Im sure we can pull the chart up and look. I'll look at it tomorrow while Im tuning on the dyno. Now you got me curiious! LOL.

[HalfBaked]

I too am curious haha.

[BTLFED]

I think I saw it, too. Didn't I, Chris?

Well.....uh....pretty sure you did.

And I get what you are saying, Erin, but I just didn't want you to prematurely throw the BS Flag. ;)

[HiPSI]

I too am curious haha.


that's a totally different subject, put away the gay porn.

[XBLG20]

funny coming from a guy with a 4G63

edit: Anyone who used this ^^^ in a quote, just to let ya'll know i was just playing ... thank you for your comments and i hope you all have a wonderful day :)

[Tracy]

Anyone who used this ^^^ in a quote needs to chill the fuck out (ie SleepingTalon, BTLFED, and tracy)... nobody knows how to take a joke at all and everyone gives DSM owners a hard time about it. If i were serious I would back up my statement with many facts. IT WAS A JOKE ... nothing more nothing less ... A JOKE. If i need to break it down even more for anyone just let me know ... thanks

anyone saying FUCK when it is not necessary if it was only a joke needs to chill the fuck out. I certainly did not jump you case. I only made a simple statement. A simple smilie:) or "just playing" would help people know it is a joke. This is the internet. We can't hear your tone of voice. If you need me to break it down anymore...LET ME KNOW ;)

[XBLG20]

anyone saying FUCK when it is not necessary if it was only a joke needs to chill the fuck out. I certainly did not jump you case. I only made a simple statement. A simple smilie:) or "just playing" would help people know it is a joke. This is the internet. We can't hear your tone of voice. If you need me to break it down anymore...LET ME KNOW ;)

is that better? BTW the only reason why i came back with that reply is because it seemed as if they were being assholes about the whole thing (which they were)

[Tracy]

is that better? BTW the only reason why i came back with that reply is because it seemed as if they were being assholes about the whole thing (which they were)


Was I being an asshole? They ARE both assholes (that has nothing to do with me), but I don't know why my name was included in that bunch...because I responded to what you said? I couldn't tell that you were joking. If you were then no harm done, right?

[XBLG20]

Was I being an asshole? They ARE both assholes (that has nothing to do with me), but I don't know why my name was included in that bunch...because I responded to what you said? I couldn't tell that you were joking. If you were then no harm done, right?

i know you werent being an asshole/bitch ... you honestly never are ... you're name shouldnt have been added to that post and when i typed it up and put your name in i thought of taking it out because it really wasnt directed to you ... sorry tracy :(

[Tracy]

i know you werent being an asshole/bitch ... you honestly never are ... you're name shouldnt have been added to that post and when i typed it up and put your name in i thought of taking it out because it really wasnt directed to you ... sorry tracy :(

It's cool. I'm sawry, too. + however many mine are worth now for apologizing and saying that I am never a bitch...even tho we all know that's not true :D

[i4_garage]

i suggest boosting the original motor....do something diferent for a change.....and plus....more money for ur honey...lol

[EmotorsportsE]

Definitely built KA-T, more bang for your buck very torque happy, gotta remember there's no replacement for displacement, 2.4 to 2.0. Or go for weight saving and get an SR and make power from it. Whats your budget, and how much power do you want? Damn, this thread is cluttered with alot of useless shit, about 9/10's of the posts on theis thread should be in the whoreslounge

E

[i4_garage]

yeah....so i will try to keep the thread informative....always go wit the original motor first ......i will boost mine as well....u can get more performance stuff and be torquey as well....the only way i would go wit SRs is to stick wit the JDM theme.....if not that..then KA is the way to go....boost it til it die first...lol

[HiPSI]

yeah....so i will try to keep the thread informative....always go wit the original motor first ......i will boost mine as well....u can get more performance stuff and be torquey as well....the only way i would go wit SRs is to stick wit the JDM theme.....if not that..then KA is the way to go....boost it til it die first...lol


last i checked SR's don't have any real problems creating torque with a proper turbo setup and tuning ;).

everyone see's different benefits/weaknesses in every motor, just pick one and run with it.

[i4_garage]

yup......i won;t say anything about that...it;s really all on how u set it up....pick wisely tho...good luck to u