info on weight reduction

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
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Juujai
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hp/tq gains is no big deal but the cornering/handling is so much different !!!

i consider rotating mass more like response. car will react to the driver a lot faster. with lightweight forged wheels/tires, chromoly fly, and a cf driveshaft oh my... you'll smile driving it.

i wonder how much lighter is that peak performance chromoly hub over a stocker. might have to get that.


Nismo_Freak
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I wonder if I can keep my S13 in the 2300's with the Z brakes...

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Nismochick240
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DjPantsSpecR wrote:ha neejay, you can just pretend you're ultra badass and gut the speakers too.... then brag about how hardcore you are. don't even put the passenger seat back in. no im just kiddin, no one gets the ladies without the passenger seat, and gutted coupes dont get ladies anyways, and who am i kidding i just plain dont get the ladies anyways...

anyways, i was just kiddin, you can notice literally no difference with the passenger seat in or out. However, it is close to an equivalent of about 2 horse, but thats crank horse, and come on now, you cant notice that.

the point i'm trying to make here, is that it makes your driving experience so much better. I daily drive mine everyday, and in stop and go, and i never want that interior back. You feel much more in touch with the car, and you hear problems and rattles that you wouldn't otherwise here in some situations.

do it, and get rid of that sound deadoning too.... but use a heat gun
passenger seat-- my bf's supra ran a 9.78 w/ the seat-- w/o 9.71 not a big difference on the street but it is on the strip

as for getting ladies-> that can be true if you're trying to hit on a girl that knows NOTHING about cars-- i thought people were STUPID for doing that until i really got into cars-- now i think it's cool as fruck! but dont take the passenger seat out b/c girls dont like riding on crates!! like i did one time in my friends gutted mustang-- not cool at all--

& i agree that you're more close to ur car-- you can hear rattles and knocks and stuff you wouldn't hear w/ the seats!!

lee.
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dfw240_EE wrote:For example, you live in Michigan. By all means, dump that A/C!
Obviously you have never been to Michigan or stayed long enough to get a feel for the weather. Heat is not the killer, it's the humidity.

dft24ds
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HUMIDITY? come to florida I'll show you humidity

DjPantsSpecR
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No AC is definately livable here in minnsota, but to be fair our summer months are ridiculous

anywho, thats not my point at all

yeah, the power gains aren't what you're looking for by stripping the car, however if you're broke as hell it is a nice addition. The tail is much more happy, yet predicitable even with an open diff and stock suspension

i don't think much was said of losing power seat belts. The removed rear seat belts can be retrofitted to work in the same bolt holes as the power seat belt. however the ratcheting mechanism doesnt work so you have to fit it to the length you want it to be in the position you drive in. this is nice becasue you can either make it like the regular belt with some slack, or tighten yourself down much better. if you're racing you wont care, cuz you probably have a harness

plus, have you ever seen a nicer 240sx interior that wasn't stripped and painted. One comes to mind i saw a few months ago in a magazine. I was kandy *** blue on the inside and orange outside.

white in the white car is nice too...

dfw240_EE
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lee. wrote:Obviously you have never been to Michigan or stayed long enough to get a feel for the weather. Heat is not the killer, it's the humidity.
Ok, I just thought of some state WAY North (I am in Texas, it can't be that bad there, you should try Houston/Beaumont) and went with it.

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dickie
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Nismochick240 wrote:passenger seat-- my bf's supra ran a 9.78 w/ the seat-- w/o 9.71 not a big difference on the street but it is on the strip
not doubting your bf's skills, but thats not a good way to judge whether the reduced weight made a difference. to effectively judge that from the data, he would need to have launched, shifted, and accellerated EXACTLY the same each time, which is completely impossible. even if you could build a robot that COULD do it, you have to consider the fact that the car has used gas between runs, which reduces weight, the condition of the tires between runs, the track, whether hes being pushed or pulled by the wind, how many tacos he ate between runs, etc..

i doubt that just removing the pas. seat could amount to a .07 second improvement by itself :P

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0wn3r
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d!ck wrote:i doubt that just removing the pas. seat could amount to a .07 second improvement by itself :P


now i don't have to think of a reply. ty!.

mirra32
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making a car lighter makes one of the biggest difference....if it didn't why would a 270 HP Cobalt beat a 800+ Nissan skyline....because the cobalt was totally stripped and focused on suspension while the skyline had more weight on it.....thats my biggest proof...since i got my car to weigh 2400 LBS on the dot it has made a huge diffence in the acceleration...motor just feels like its hauling alot less

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GhostDriver
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How are you guys weighing your vehicles? Let me also clarify that the reduction of weight doesn't add power, it frees the potential.
mirra32 wrote:making a car lighter makes one of the biggest difference....if it didn't why would a 270 HP Cobalt beat a 800+ Nissan skyline
Btw, you can die now.lol j/k

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0wn3r
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GhostDriver wrote:How are you guys weighing your vehicles? Let me also clarify that the reduction of weight doesn't add power, it frees the potential.

Btw, you can die now.lol j/k
lol..yea. i dont ever see a friggin cobalt beating a skyline with those #'s, sorry.

naed240sx
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GhostDriver wrote:How are you guys weighing your vehicles? Let me also clarify that the reduction of weight doesn't add power, it frees the potential.
Yeah I think everyone here realizes that, but it is simply saying that the removal of x amount of weight will have the same effect(as far as acceleration goes) as the addition of y horsepower.Essentially the loss of weight will be the equivalent of a gain in power. Converting it into horsepower just alows you to more easily see what effect you are having on your car.

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GhostDriver
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I still want to know how or were to weigh my car.

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0wn3r
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you should be able to do them at truck weigh stations i believe... not sure how much it may or may not cost though

and exactly naed240sx.

lrb_2000
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there's like 4 places around here.. I just go in the middle of the night, pull up on the scale, and it shows up on the screeen mounted to the wall.. it's a rock quarry place... anywhere that weighs trucks with a weight screen outside would work.. look in your phone book or something lol.

only thing that sucks is, the scale I go to goes in 20lbs increments.. so I don't get an EXACT weight. I started around 2880 with 1/4 tank of gas when it was stock. it's now 2720, without sound deadning, spare tire, jack, rear seat, deck lid, and all the interior behind my seat.. and same gas.. so i'm thinking, when I get a carbon fiber hood, hatch, and loose my A/C and autoseat belts, plus 2 lightweight racing seats, it should be down in the 2500's.

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dickie
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maybe if youre sporting plexi

DjPantsSpecR
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something like 48 lbs to be saved from removing autobelts ( but you'll need a harness in its place, whats that weigh?)

ac is what 32, 35 40? bad memory right now

there is about 38 lbs to be saved in a carbon fiber hood

with the two seats there is probably about 40 total pounds to be saved

can't tell you about the hatch, but i doubt you can really put glass in that anyway, so the plexi gain you'll have to get is like 70 lbs so that is quite awesome

that actually puts you just under the 24xx mark. especially when you find more miscellanious hardware to remove

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dickie
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you cant be street-legal and have plexiglass

unless you know someone

and i do... but its out of the question for me and my hatch. maybe ill get a coupe to gut. its lighter from the get-go.


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GhostDriver
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Hows that saying go?.... "If you want to shave 100lbs find 1600 ways to lose an ounce."

vvaffle
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d!ck wrote:you cant be street-legal and have plexiglass

unless you know someone

and i do... but its out of the question for me and my hatch. maybe ill get a coupe to gut. its lighter from the get-go.
I don't get it, why is it out of the question? And how would anyone know if it's plexiglass.

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0wn3r
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vvaffle wrote:
I don't get it, why is it out of the question? And how would anyone know if it's plexiglass.
they have to be DOT legal, it usually says on the glass. (don't think all windows have it on there, i can't really go check tho, it's dark)

Doomed2Walk
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Gutting speakers and stuff is WAY too hardcore for me, ESPECIALLY because my car is my daily driver. But, if you really want to lose weight you got to do where it really counts: up high, past the axles and rotating mass. If you can significantly reduce rotating mass, you will accelerate a lot faster. If you reduce the weight up high and past the axles, the car will also be more responsive when steering. And don't forget to balance the weight out as most people tend to remove weight from the rear only making the car too front-heavy. 0wn3r, if the 240 does have 50/50, with a CF hood, and removal of the spare + jack would still keep that balance somewhat. For auto-x, track days, etc. I'd rather take a car that is balanced + lighter with less-power than a bigger, heavier, higher-powered car. Anyone see that clip of the S2000 catching up to Ferrari 360s on the corners?

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dickie
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vvaffle wrote:I don't get it, why is it out of the question? And how would anyone know if it's plexiglass.
for what i currently use my car for, it would be too much of a pain in the *** to swap all my glass for plexi. expensive, and not really needed for a dd. trust me, you can tell a car with plexiglass from a car with regular type pretty quickly. so can the police.

there is so much more i could spend the money on, starting with brakes and working all the way to a new sr20.

mirra32
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i drive my car everyday......i also work the morning shift so i can deal with no ac as well....i have a second car which my wife drives and that has the stereo. ac and all the other junk and we drive that around when we go out......i have no insulation or any of that gunk in my car.....i should take a pic.......

eric

fyi!!!!!and yes a -300 chevy cobalt beat a 800+ skyline....saw it on tuner t/v or something....and this was on a track....i followed the whole build...you die biach

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PapaSmurf2k3
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Doomed2Walk wrote:Gutting speakers and stuff is WAY too hardcore for me, ESPECIALLY because my car is my daily driver. But, if you really want to lose weight you got to do where it really counts: up high, past the axles and rotating mass. If you can significantly reduce rotating mass, you will accelerate a lot faster. If you reduce the weight up high and past the axles, the car will also be more responsive when steering. And don't forget to balance the weight out as most people tend to remove weight from the rear only making the car too front-heavy. 0wn3r, if the 240 does have 50/50, with a CF hood, and removal of the spare + jack would still keep that balance somewhat. For auto-x, track days, etc. I'd rather take a car that is balanced + lighter with less-power than a bigger, heavier, higher-powered car. Anyone see that clip of the S2000 catching up to Ferrari 360s on the corners?
right... it lowers the center of gravity. Thats why the EVO MR edition (i think) has an aluminum or carbon fiber roof. Although it only saves 8 lbs, it lowers the center of g .1 inch or something, and that is pretty big. A CF hood should also lower the center of G, although not as much as a roof or something. Also, You can definately get away with lexan glass, (honestly, have you ever heard of someone getting busted for lexan? nobody around here checks for it) just dont use it in the front, aparantly it scratches way easier than glass. Also, for those of you wishing to weigh your cars, Local Dumps (landfills) usually have a weigh station that you go through if you are dumping lots of stuff. They give you a printout when you leave, shows you how much stuff you got rid of, then they charge you by the lb. When I did this my 91 coupe (about a half tank of gas, full interior with amps, NO AC, no ABS no HICAS, no driver) weighed in at 2730 lbs

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dickie
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you can get away with it if the cops dont know what to look for. around here they do. my friends 69 camaro would get pulled over all the time, and thats a freaking camaro... it violates safety stadards and isnt dot legal, and the cops here are d!ck about it.

im not going to advocate replacing your daily driver's glass but if you understand its not legal and youre willing to accept the risk then knock yourself out.

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Nismochick240
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doom2walk-> some guy on myspace told me i looked like her... but i dont know who she is i never saw that movie... r u the same guy lol

240DRFT
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lrb_2000 wrote:there's like 4 places around here.. I just go in the middle of the night, pull up on the scale, and it shows up on the screeen mounted to the wall.. it's a rock quarry place... anywhere that weighs trucks with a weight screen outside would work.. look in your phone book or something lol.

only thing that sucks is, the scale I go to goes in 20lbs increments.. so I don't get an EXACT weight. I started around 2880 with 1/4 tank of gas when it was stock. it's now 2720, without sound deadning, spare tire, jack, rear seat, deck lid, and all the interior behind my seat.. and same gas.. so i'm thinking, when I get a carbon fiber hood, hatch, and loose my A/C and autoseat belts, plus 2 lightweight racing seats, it should be down in the 2500's.
thats what i do to...and the place i go to goes in 20lb increments too. its weird though my 240 weighed exactley 2720 stock, and ive lightened it up since then.

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0wn3r
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seems like you could replace the driver and probably passenger window more easily... i say this because when you get pulled over, you'll usually put the window down anyways


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