i need help modding

ONLY for ADVANCED technical discussion about the 240sx!
danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

i wanna add some mods to my 91 240sx se and i dont really know what to do or what products to get. i have kinda noticed there arent any cold air intakes so i figured i would do a cold air extension tube and high flow air filter. other than that i have a general idea but dont really know where or what to get. my ideas are:

1:air filter and cold air extension tube2:throttle body3:headers4: high flow cat5: cat back exhaust (im lookin at apexi n1)6: new ecu

so basically i just need to know what brands to look at, where i can find these at a decent price (im hoping to do all that around $1500 if i can), and if these will be enough to get at least 200 hp and better low rpm response. it seems sluggish until it gets up at 4k rpm. thanks for the advice


User avatar
corn322
Posts: 1572
Joined: Tue Apr 22, 2003 10:11 am
Car: 1993 240sx
Location: Austin, TX

Post

1. there are cold air intakes for your car, but making one would be cheaper.2. what about it?3. ok4. ok5. ok6. don't need it yet.

this will not get you to 200 hp. it will get you maybe around 160 hp off the crank. 165 if you do the computer too. if you wanna put down 200hp easily, invest in a turbo set-up.

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

only 160??? the car has 155 stock. or do you mean 160 rwhp? i just wanna beat my friends 96 3000gt. he says he has about 240hp but i think he just has a stock set up which would be 222hp. but his car is 3200 pounds and has fwd. mines what about 2400 i think? and has rwd. so i just need to beat him and then ill consider investing in a turbo. right now its too much money to spend

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

I still dont know much about 240's but here's my reply anyways

If you actually got the advertised horsepower, those mods would probably get you 200 crank, but:

1. filter & tube = 5hp if you're lucky2. throttle body. a couple hp3. Headers...actually you mean 'a header', but you'd be lucky to get 7hp4. high flow cat = 2hp5. cat-back = 5hp6. New ECU..whats wrong with the old one?

so, you're wanting to spend about $1k on about 20hp, which would give you about 175 at the crank - 20%+- drivetrain loss at the wheels. Underdrive pulleys are cheap. get some of those

modding aint cheap. if you want horsepower, go turbo

The mods you listed are kinda like pre-mods. Can you make a stock engine breath better? Yes..a little. If you want more hp from an NA motor, you're gonna need cams and some headwork. Weight reduction would help considerably too.

Modding your car just to beat your friends is kinda :angel

humpy012
Posts: 55
Joined: Mon Jul 14, 2003 4:53 am
Car: Mark VIII

Post

danm3286 wrote:1:air filter and cold air extension tube2:throttle body3:headers4: high flow cat5: cat back exhaust (im lookin at apexi n1)6: new ecu


You have no need for a new throttle body, cat, or ecu. But the other mods could get you 15 hp, and if the 3000gt wasnt turbo you should be able to beat it.

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

[quote=" j92s Modding your car just to beat your friends is kinda :angel [/quote]

hes not much of a friend anymore. he always talks about how he hasnt lost a race and he says ill never beat him. i just wanna show him that i can beat the car his parents are paying for and use my own money to do it so hopefully he wont be so arrogant anymore. its a non turbo 3000gt and i dont have the money to invest in turbo. i figured the new ecu would give me a lil power. and get rid of the governor... not that i need to yet but hopefully one day i would have to go over 108 in a 1/4 mile. eventually id like a turbo. but now i just figured if it breaths better it could beat him. im looking into pulleys too. but like i said i dont know where i should get all this stuff or how much to spend or what brand names are good. any help would be great. and ive heard a new header makes it quicker in the lower rpm... is that true??:help :help :help

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

Umm, you're very very very far away from even having to worry about hitting 108 in the 1/4.

I dont know anything about headers, but i can almost guarantee that its not going to make the kind of difference you're after

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

yeah i know im not gonna worry about that for a whilei figure intake and exhaust and ecu would be enouhg to do it but i guess not. maybe a gear ratio change?

User avatar
corn322
Posts: 1572
Joined: Tue Apr 22, 2003 10:11 am
Car: 1993 240sx
Location: Austin, TX

Post

the dohc s13 weighs around 2700 I think....

toki
Posts: 1344
Joined: Thu Jan 09, 2003 7:27 pm

Post

all 240s weight at minimum 2700, closer to 2750, and 2800 as you get up there in the years and power accessories.

If you want power, it's time for you to get a valve job, get your engine bored over, and run a high compression, with an intake and exhaust, possibly headers, you should be set for maybe 180whp. Thats thinking positively. The best way you are going to be getting HP, is nitrous.

User avatar
pervytheclown
Posts: 41
Joined: Fri Feb 28, 2003 5:32 am
Car: Cars (obviously..), Music, and "fly-*** *****es"
Contact:

Post

danm3286 wrote: and better low rpm response. it seems sluggish until it gets up at 4k rpm.


I dont know about the rest of the guys..but I've always known the 240's, the KA24DE especially, NEVER be sluggish off the line. Hell, thats what those engines are known for are just monster torque. if you want my input, I would take all of the money ( or a good portion of it, at least ) and figure out why your not getting out of the hole quicker. I think you should start with new ignition products (i.e. Spark Plugs and Wires) do a fuel filter. and maybe look into an LSD swap if you dont already have it. I dont know if the rest of the guys on this forum will back me up on this or not, but you have to learn how to crawl before you can walk. What im saying is, do the little things right, get the minor things taken care of, and then look into modding. Hell, ive had my car 2 and a half months and its one of the fastest cars out of the hole ive ever drove. All I have done to it is drilling the bottom of the intake, taken the intake resonator off. New fuel filter and new plugs. I also replaced a good deal of the fuel lines that are in there now. But, of course, I could be talking out of my *** here. If you did happen to take into consideration all the "minor" mods, more power to you. You have to remember that these cars are extremely light, so just a few horsepower can and usually does get you a long way. Start with trying to find an intake for it first and then do exhaust. Try here: Nopi Online they are expensive as ill get out, but if your having problems finding a particular part, chances are they have it. Intake, Exhaust, New plugs and wires, and a decent set of tires should have you roasting that 3000gt in no time. Good luck.

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

maybe sluggish is the wrong word. its just that the rpms rise steadily and then when it gets around 4k rpm it shoots up like all hell. i may jsut go with turbo and cat back exhaust. although i see what you are sayin. it could be little things causing that... plugs etc so ill look into that. thanks for the advice. i didnt think somethin like that could cause it to be slower. oh and is it true that certain spark plugs can add hp? and if so which are they and where could i get them at a good price?

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

danm3286 wrote: may jsut go with turbo and cat back exhaust.


You make it sound so easy!

i doubt youd see any gains from any kind of spark plug. Just get quality plugs, wires, rotor, cap

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

haha i wish it was easy. im havin to pull 20-30 hrs a week at work just to do all this. on top of going to high school and running track. but running may have to get cut out this year just so i can get all this done. i really think the sr20det swap would be the better idea because i have 120k miles on my car. but its so expensive to buy that engine and then id have to get it put in so idk what ill do

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

danm3286 wrote: its so expensive to buy that engine and then id have to get it put in so idk what ill do


get a low miles KA = cheap and put it in yer damn self!

swapping motors isnt witchcraft or black magic. Just a bit of elbow grease and some bolts.

MainEvent212
Posts: 4182
Joined: Tue Mar 04, 2003 1:21 pm
Car: 95 Nissan 240SX SE w/ SR20DET+goodies

Post

to my knowlege 3000gt's are RWD...and they're fairly fast, turbo and N/A...you're gonna need a little more than I/H/E to beat him...and by the sounds of it, you dont know what you're doin, so read up and learn before u go asking ridiculous questions like this...

ricer

:rolleyes

MainEvent212
Posts: 4182
Joined: Tue Mar 04, 2003 1:21 pm
Car: 95 Nissan 240SX SE w/ SR20DET+goodies

Post

oh yeah, forgot to comment on your actual post

1:air filter and cold air extension tubeair filter comes w/ intake buddy, it wont do ya much good to beat a 3000gt, and ur best off making your own...an intake is an intake, the power difference is nominal, **** what u heard from honduh boys

2:throttle bodydont need to change this, it's popular on honduhs, but not necessary here

3:headerswont give u a whole lot of power, considering ur low power output a 2.5 inch exhaust should have ur car defocating it's exhaust fine

4: high flow catum...if u want...go for it!

5: cat back exhaust (im lookin at apexi n1)N1 is no good for a N/A application, if u dont wanna spend alot of money (sounds like you dont have alot) have a muffler shop weld you up a 2.5" exhaust, as straight as possible (mandrel bent is not extremely important) w/ a nice magnaflow muffler or somethin, it'l be like 200 bucks tops

6: new ecuJWT will give u a little bit of power on ur N/A application but they're hella expensive for what kinda power ur gettin...dont expect double digits

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

not all 3000GT's are turbo..actually, not many at all are, and its HEADER not HEADERS!

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

mainevent212 wrote:to my knowlege 3000gt's are RWD...and they're fairly fast, turbo and N/A...you're gonna need a little more than I/H/E to beat him...and by the sounds of it, you dont know what you're doin, so read up and learn before u go asking ridiculous questions like this...

ricer

:rolleyes


just to give you a little knowlege befroe you try making someone look like a dumbass.... 3000gts are fwd except for the vr4 which is awd twin turbo. the 3000gt and 3000gt sl are slow. the 3000gt vr4 is actually fast. the 3000gt and 3000gt sl have 222 hp stock. and i admit i dont know exactly what im doing which is why i came to this forum for advice. but if a bunch of ****faces are gonna try and make me look stupid ill just take my ?s elsewhere and forget about this place. but im not gonna do that because ive been very pleased with the advice ive received from the other people on here and have changed my mind from the original ideas i posted. they at least had the decency to respond wiht respect instead of sayin hey youre stupid go read up before you ask for advice. and i appreciate those people that have helped me out. ive learned a lot from them and they are very nice people. maybe they can teach you the manners your mother forgot to teach you

User avatar
D-UNIT
Posts: 787
Joined: Mon Jun 23, 2003 10:37 pm
Car: a 91' S13 (15.014 @ 94.56mph NA) KA-T

Post

Fwd 3000gt's hit about a 15.65 in the quarter. So your going to have to work to beat that. I got all of that cool stuff (ecu, ignition, test pipe, cold air intake, borla cat back( oh so quiet), no header, no t.b. Previous owner states " 15.1" I can only manage 15.8 @89 m.p.h. with a really bad trans( grindin 2nd 3rd)(losing about .275 to .300 sec. per. shift). So if u have a good trans. and you buy all those goodies maybe u could hit a 14.9@90 m.p.h. and leave your "friend" in the dust.

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

im ran a 15.53 in mine with a bad trans and 180k miles. Stock motor/stock intake/stock exhaust, with a sub and amp in the trunk and heavy racing seats.

On another note, you cant get too mad at mainevent. These questions/answers have already been answered a million times and it does get a little old answering them over and over again, and trying to lower your time with piddly-mods IS kinda pointless IMHO

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

yeah i appologize to him cause i um was a lil drunk when i typed all that and i understand this stuff gets posted a billion times its just hard to find it all as specific as i wanted. but right now i just gotta figure out if i can get a turbo for $1500. a friend of mine said he could help me get it for that price so im gonna give him a call and see whats up. what kind of times could i get with a ka24det?

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

Its possible to do for $1500, but its not doing it 'the right way'

If you're like me, you'll start out with a budget of $1500 but it will quickly become much, much more.

Depending on the setup, you'll see high 13's to mid 14's. somehwere in there.

Don't be cheap and go non-intercooled. Your engina will thank you

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

the guy said ill have an intercooler on there. im guessin he knows some people thatll give me insanely cheap deals or somethin. but he knows A LOT about cars and when he says $1500 ill believe it. goin up to $2000 wouldnt be that bad. high 13s mid 14s woudl be sweet. i wanna get rims too after a while so ill add wider tires on the back. you think that would be a bad thing to do? like normal size tires in the front and bigger tires in the rear? i dont wanna lose handleing or anything but i want more traction

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

well, if you wanna be able to rotate your tires easier, stay the same size.

You dont necessarily need to get bigger rims for the rear, but i guess you could just get bigger tires for more powerful launches if they are real sticky and you have a turbo and of course an LSD to put it all down

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

whats an lsd? im kinda new to the whole car thing. i was really into systems and then decided to go for speed for some reason. how hard is it to change your tires at the drag strip? i could just invest in a pair of slicks instead of buying rims. would that cause damage to the car though? my parents dont want me to race because they say its very dangerous and horrible for a car. but i believe if the driver is confident in what theyre doing and understands the risks then it lessens the danger. and goin up to redline every now and then cant be too bad for a car

SloS13
Posts: 1348
Joined: Tue Sep 03, 2002 6:54 am
Contact:

Post

lsd makes both tires hook up instead of 1. Anytime you push a car to its limits, there's a possibility of damage although I've only seen a friend damage his car once at the track. Well, okay maybe 2 or 3 times

User avatar
SquirrelOnFire
Posts: 40
Joined: Wed Jun 18, 2003 7:15 am
Car: cars and computers

Post

search for lsd 1.5 or lsd 2.0Theres a really great post that explains everything u need to know about lsds. Just search a little n ull find it

aesthetect
Posts: 3
Joined: Wed Aug 06, 2003 5:56 am

Post

if youre just wantin to beat this kid, throw down a couple hundred bucks on a NOS set-up, race, THEN take the time and money to build a good, complete turbo setup...something that I really dont know anybody who could do for $1500. besides you know as soon as you spend all your money on a turbo kit and tuning etc youre gonna have to drop a $1000 on routine maintenance (murphys law)

danm3286
Posts: 59
Joined: Wed Jul 30, 2003 7:09 pm
Car: cars and women

Post

my new goal isnt to beat him but to get a 14 sec before i graduate. and a turbo daily driver could mean a lot of trips to the mechanic so im wanting to do a rebuild and see if i can get a 14 secthen ill go with the boost


Return to “240SX Technical Forum”