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Old 05-16-2008, 10:16 PM   #1
zero-d
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Default Weight reduction mods. Need any and all input.

I would like to know what you guys and gals have removed, and about how much the parts weighed , the amount of weight you removed, and what total weight you think or know the car is at. I have removed the brace inside the glove box, spare tire and jack, board in trunk ,lighter floor mats. I read a thread a while ago but couldnt find it. please help with my obsession in weight reduction.
Thanks
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Old 05-16-2008, 10:19 PM   #2
jordanderson
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use newspaper as floormats, they are way lighter than any new age lightweight floormats on the market.
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Old 05-16-2008, 10:19 PM   #3
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Jack, spare, rear seats, stock uppipe, stock tbe.

The stock exhaust parts are heavy as hell.
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Old 05-17-2008, 10:06 PM   #4
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Remove the rear seat and the passenger seat.

Take the entire hood off if you want to get real serious.
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Old 05-17-2008, 10:14 PM   #5
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Lose weight.
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Old 05-18-2008, 12:53 PM   #6
Kamikaze03084
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drain all of your fluids.
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Old 05-18-2008, 01:10 PM   #7
jace2k5
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Quote:
Originally Posted by eurospek View Post
Lose weight.
PUT THE COOKIE DOWN!
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Old 05-18-2008, 01:22 PM   #8
105wrx
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change suspension, new wheels, remove ac parts, trunk liner, remove all speakers, lighter seats...and so on...not to hard to figure out...
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Old 05-18-2008, 01:28 PM   #9
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i think you can pretty much get rid of anything that doesnt make the car not go vroom vroom..


those air fill caps on your tires.. at least -65lbs
drive with 1/4 tank of gas?
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Old 05-18-2008, 01:52 PM   #10
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convert everything on the inside of your car to paper mache and paint it all black
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Old 05-18-2008, 02:41 PM   #11
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Quote:
Originally Posted by MF-DIF View Post
Jack, spare, rear seats, stock uppipe, stock tbe.

The stock exhaust parts are heavy as hell.
rear seats are like 5lbs if even that, i'd keep them for a clean look... street cars with no rear seats is kind of dumb lol...

rotational mass is more valuable to remove than sprung weight... the general rule of thumb is 1lb of rotational mass is equal to 10lbs of sprung weight. (wheels,tires,brakes, pulley, flywheel)

jack, lightweight seats, spare tire/tools, catless uppipe, TBE, lightweight wheels/tires, lighter brakes, pulley, flywheel, subframe, sti aluminum control arms, suspension (my coilovers are lighter than OEM suspension)

the stock exhaust manifold is heavy, replacing it with UEL / EL headers will help reduce weight.

thats all i can think of off the top of my head that will yield the biggest weight reduction gains

I am a huge fan of weight reduction as its the only thing that improves every aspect of the car if you're on coilovers after all the weight reduction defiently get the car corner balanced.
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Old 05-18-2008, 02:42 PM   #12
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was hoping more serious people would answer this but i guess not . I was asking the people who care about weight reduction what they have removed and approx weight. I read one a while ago a very detailed list but cant find it when i search. so anyone who is a real car enthusiast and cares about every ounce of perfomance they can squeeze out of there car and care about helping each other out please list the parts you found removed and approx weight. EXAMPLE, in the glove box there is a brace that weights approx 4 lbs., if you use this type of seat you save xx amount of lbs. these coilovers weigh less than this brands coilovers and offer same amount of adjustments.
anyone who has real info I would very much appreciate it.
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Old 05-18-2008, 02:43 PM   #13
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kaldar thanks for real input and help
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Old 05-18-2008, 02:44 PM   #14
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you can also get hollow swaybars such as Cobb to help keep the weight down. They are rated at 25mm but because they're hollow it only equates to about 22mm.
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Old 05-18-2008, 02:55 PM   #15
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thanks to a few others that had info. I know the basic stuff speakers, rims, etc. I'm looking for stuff that is hidden in the car that can be removed, like the brace in the glove box. I know people have found tons of stuff i read it in a post a while ago but cant find it. i know racing seats save alot of weight not just with the seat but the seat bracket as well. anyone know of lighter rotors, drilled and slotted of course but someone mentioned a brand that was lighter.hope someone knows. I know our body parts are already pretty light. does fiberglass or seibon carbon fiber really save that much weight compared to stock body parts
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Old 05-18-2008, 02:56 PM   #16
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most of the things i listed will give you a significant amount of weight reduction without reducing drivability / practicality. i would stick to removing the weight on rotational mass... although its more expensive, it is defiently worth it although lightweight subframes are nice they give nice weight reduction gains and stiffen the chassis.

going from OEM wheels/suspension/brakes to subaru 4 pots, tein flex coilovers and enkei RPF1s i noticed a huge difference. The Subaru 4 pots were defiently lighter than the oem 2pots although if you're looking for even more weight reduction OAKOS.com has a 4pot oem replacment brake that is even lighter.

i don't have official weights but the coilovers were defiently significantly lighter then the STi springs/struts i had on my car. for example, i could easily carry all 4 of my coilovers in a box... but carry all 4 springs/struts in a box was hell, especially trying to get them upstairs lol.

and the oem 16x6.5 wheels are 16.5lbs whereas the 17x8 RPF1s are 15.4lbs(+/-), stock TBE is very heavy compared to a full TBE. i'd also recommend a lightened pulley, i really like mine
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Old 05-18-2008, 02:58 PM   #17
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kaldar do you have cobbs sways. was wondering how well they worked compared to other solids of the same size
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Old 05-18-2008, 03:00 PM   #18
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Quote:
Originally Posted by zero-d View Post
thanks to a few others that had info. I know the basic stuff speakers, rims, etc. I'm looking for stuff that is hidden in the car that can be removed, like the brace in the glove box. I know people have found tons of stuff i read it in a post a while ago but cant find it. i know racing seats save alot of weight not just with the seat but the seat bracket as well. anyone know of lighter rotors, drilled and slotted of course but someone mentioned a brand that was lighter.hope someone knows. I know our body parts are already pretty light. does fiberglass or seibon carbon fiber really save that much weight compared to stock body parts
no, we have aluminum hoods and the difference from going to aluminum to CF is almost non-existant. although switching to a CF trunk i believe will help shave some lbs but probably not worth the price tag.

if you want to get serious you can take out your interior, remove all the sound deadening material then put your interior back together. NOT recommended for a daily driver though, i did this to my S13 and daily driving was hell lol.

you can remove the stock exhaust heatshielding where the muffler goes which weights a few lbs.

i would not do drilled rotors as they have a tendancy to crack especially on street cars where they are constantly being heated up / cooled down.
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Old 05-18-2008, 03:00 PM   #19
zero-d
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what brand pulley do you have.
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Old 05-18-2008, 03:02 PM   #20
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kaldar thanks for all your suggestions and input i really appreciate it.
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Old 05-18-2008, 03:07 PM   #21
Kaldar142
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Quote:
Originally Posted by zero-d View Post
kaldar do you have cobbs sways. was wondering how well they worked compared to other solids of the same size
i don't, but they would be like using cusco swaybars, which i do have.

the rear cobb 25mm is 3 way adjustable, putting it on the same level as the cusco rear solid 22mm 3 way adjustable bar. which i am very satisfied with. my friend has 27mm whitelines which i installed on his car and they are definetly heavier.

if you are still on a stock swaybar/endlink you NEED to get a RSB (rearswaybar), it makes a HUGE difference.

if you don't have a catless uppipe / catless TBE defiently get one, its alot lighter than stock exhaust i can't stress this enough along with a tune the increased power is nice compared to stock.
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Old 05-18-2008, 03:08 PM   #22
Kaldar142
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Quote:
Originally Posted by zero-d View Post
what brand pulley do you have.
perrin lightened pulley, it weights 1.2lbs and the stock piece weights over 4lbs. you can get it for 125$ shipped from gruppe-s.com
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Old 05-18-2008, 03:10 PM   #23
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one more thing i want to add, every 100lbs you lose you shave off a tenth of a second off the 1/4. it all adds up here and there, trust me

even going on a diet will help. say you shave off of 80lbs of your car, then you lose 20lbs yourself... thats a 100lb loss lol
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Old 05-18-2008, 03:13 PM   #24
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one thing you can do is take out all your seats n carpet and use dry ice to remove the sound deadening on the floor panels
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Old 05-18-2008, 03:24 PM   #25
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Quote:
Originally Posted by Kaldar142 View Post
you can also get hollow swaybars such as Cobb to help keep the weight down. They are rated at 25mm but because they're hollow it only equates to about 22mm.
i'm happy with my hotchkits sways, they're hollow too.

-a braille battery can save a few pounds.
-swift springs are supposed to be lighter.
-replaceing the front sub frame (25lbs) with a lighter aftermarket one
-you dont "need" the torsion springs that hold your decklid up
-fill your tires with helium, then you can just float down the road
-TCE preformance products makes a "little brake kit" and each rotor weighs less then 10lbs
-bumper bars are only there for your safety, so take them out
-airbag computers and wiring looms are heavy. plus they have gold in them that you can use for your grill

once the quest for weight is done, a possibly more important one of weight distrabution should be undertaken

its allot simpler to get 2 more horses, then it is to remove 20 lbs. unless you are trying to compete in a NASA or SCCA class for TT or whatever, will that 3oz you saved by removing your shift boot really help your street car?
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