Advanced Weight Reduction Questions - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

godzillarb · 10-31-2007, 09:46 PM

S14 SE chassis. The car is driven on the street but is mainly used for grudge racing at the local drag strip (aka people who think their 80k Viper is fast).

For starters I did all the normal stuff like removing the interior, radio, a/c, heater, carpet, wiring, jack, spare, bumper support, airbags, sound deadening, titanium exhaust (ok ok, not normal), light wheels, coilovers, seats, ect.

The sunroof will be plugged soon along with getting a lighter hood. I know there are CF doors, but come on, $1600? I'd rather spend that on internals.

With that said, I've heard a couple guys talking about cutting out the metal supports in the doors. I think they're referring to the extra metal skin that's on the door. Does anyone have pictures of someone that has done this? The ability of the plastic door pieces going on is not an issue. Also, exactly what parts of the interior metal can be cut out... one guy said something about the metal in between body panels?

Without going to a CF trunk lid, what if any can be trimmed from the trunk?

If anyone has done this stuff pictures would be greatly appreciated.

My RB is a fatass

Irukandji · 10-31-2007, 09:49 PM

The lining on the inside of the trunk pretty much weighes NOTHING and will make your trunk super flimsy. I did it on my old car and I regretted it.

johngriff · 10-31-2007, 09:57 PM

Pointless.

Add more boost/power.

godzillarb · 10-31-2007, 10:04 PM

Quote:

Originally Posted by johngriff

Pointless.

Add more boost/power.

That's coming as well.

However I'd like to have an edge over my main competition. This guy happens to have a boat load of money for modding his RB26 240sx, but is keeping full weight. If I can drop another 100lbs plus the ~270lbs that I've already pulled out, that might be enough. It's free performance, I'll take it.

KA-T_240 · 11-01-2007, 12:57 AM

do a custom wiring harness motor and chassis. Thats if you feel capable of such thing.

tt99ol · 11-01-2007, 01:14 AM

put a skid pan across the whole bottom of the car and lose wind resistance, sheet metal is cheap

*Nismoknightska-t* · 11-01-2007, 01:41 AM

Quote:

Originally Posted by johngriff

Pointless.

Add more boost/power.

+++++1

its all about the power

***S14DB*** · 11-01-2007, 02:05 AM

get an S13 much lighter...

cdlong · 11-01-2007, 03:18 AM

Quote:

Originally Posted by johngriff

Pointless.

Add more boost/power.

how does more power make help you turn or stop faster?

as for what to take out, it depends how hardcore you are. lightweight battery, switching to manual windows and mirrors, or aftermarket carbon mirrors. don't forget to take out all the wiring for the electronics you remove, a pain in the ass, but it adds up. for the doors, i think people are refering to the metal framework just behind the interior door panel. if you're really dedicated, you can remove the door panel, the interior framework, fix the window, and cover the opening with a sheet of aluminum.

Kn1ves · 11-01-2007, 03:37 AM

Quote:

Originally Posted by cdlong

how does more power make help you turn or stop faster?

never knew turning was such an important factor in drag racing

Addicted2Kouki · 11-01-2007, 03:41 AM

^^^LOLOL!!

messagelength.

IIIXziuR · 11-01-2007, 06:04 AM

Lexan/Acrylic Glass maybe...especially on the windscreen and backlight. Even the 1/4 Glass

g6civcx · 11-01-2007, 06:27 AM

Quote:

Originally Posted by S14DB

get an S13 much lighter...

+1. Base model coupe with no options. Sell your S14 if all you care about is drag.

If you're hardcore, there's a local guy (to me) selling a tubbed S14 set up for drag. Weighs nothing. PM me for link.

02BRB20 · 11-01-2007, 07:03 AM

redo your wiring

godzillarb · 11-01-2007, 07:36 AM

Quote:

Originally Posted by mach5camaross

do a custom wiring harness motor and chassis. Thats if you feel capable of such thing.

Mostly done, just a few odds and ends left.

Quote:

Originally Posted by S14DB

get an S13 much lighter...

Like that's practical. Might as well just get a fox body.

The lexan glass and fixing the window, that would suck for a car that's still driven on the street.

So basically cutting metal out of the door isn't a popular modification haha. I think I'll just get some door diagrams and see which parts are necessary for the window mechanism.

jobestudios · 11-01-2007, 07:49 AM

Riveted lexan windows fuddawindoe, otherwise you pretty much gotta keep everything inside the door, whereas with lexan you could just chop everything out except the latch that keeps the door closed. Rivet a NACA duct in there if you want airflow to the cabin.

cdlong · 11-01-2007, 08:51 AM

Quote:

Originally Posted by Kn1ves

never knew turning was such an important factor in drag racing

shit. i'm retarded. had that coming.

*kognition* · 11-01-2007, 08:58 AM

CF doors are not needed, and in my opinion a waste of good money better spent elsewhere. We just finished our first round of parts for factory Scion's speed world challenge team. And we took doors that were 60lb's (weighed with no glass) and took them down to 21lb's! All the while keeping stock door frame and hinges. If you have ever seen CF doors at the track on a hot day, it's sad. Bad investment. I am under the gun right now to finish up our S14 for next weeks time attack finals, but the car comes back from paint tomorrow. I will do a photo included step by step write up for the forum on how to do this while maintaining excellent door integrity. There is a trick to it. I will tell you though, that your oem door skins are approx 10lb's each. I don't have enough
time to make door skin molds right now, but i will have those next month. This is going to knock the carbon fiber door crowd into the ground, permanently.

I will subscribe to this thread, and post my link next week.

Quote:

Originally Posted by godzillarb

The sunroof will be plugged soon along with getting a lighter hood. I know there are CF doors, but come on, $1600? I'd rather spend that on internals.

With that said, I've heard a couple guys talking about cutting out the metal supports in the doors. I think they're referring to the extra metal skin that's on the door. Does anyone have pictures of someone that has done this? The ability of the plastic door pieces going on is not an issue. Also, exactly what parts of the interior metal can be cut out... one guy said something about the metal in between body panels?

Without going to a CF trunk lid, what if any can be trimmed from the trunk?

If anyone has done this stuff pictures would be greatly appreciated.

My RB is a fatass

***FaLKoN240*** · 11-01-2007, 08:59 AM

Quote:

Originally Posted by godzillarb

Like that's practical. Might as well just get a fox body.

The lexan glass and fixing the window, that would suck for a car that's still driven on the street.

So basically cutting metal out of the door isn't a popular modification haha. I think I'll just get some door diagrams and see which parts are necessary for the window mechanism.

Removing any of the skeleton of your car that you drive on the street is stupid. That stuff isn't there to make your car extra heavy its for your safety.

The bars and metal you're removing take a lot of the initial blunt trauma so your body doesn't have to.

I'm sure stripping out all the amenities hasn't made your car that much more awesome to drive on the street either.

*!Zar!* · 11-01-2007, 09:06 AM

Why don't you re-gear your car instead.

projectRDM · 11-01-2007, 09:16 AM

My old S14 got down to 2530lbs, and that's without cutting sheetmetal except for the forward parts of the frame rails (where they stick out past the core support) and the front fenderwells. I also had all the OE sound deadening and a full interior. I could have shaved another 100 pounds had I been really serious. Redoing or making a custom wiring harness reduces a few pounds. Aluminum uprights, flywheel, driveshaft all do a little bit. I was even going to go as far as cutting out the spare tire well and laying a thin sheet of tin over the opening, though it would have created some drag back there.

SILVIA_KIDs14.5 · 11-01-2007, 09:34 AM

Quote:

Originally Posted by IIIXziuR

Lexan/Acrylic Glass maybe...especially on the windscreen and backlight. Even the 1/4 Glass

Yeah agreed and you don't eve have to cut the glass peak performance already has it speced out for you. here's the website

HTML Code:

http://www.peak-performance.net/content/view/210/132/

hope it helps, also here is another site i stumbled across when i was looking to reductions

HTML Code:

http://www.importmodifications.com/240sxweightred.html

looked legit and helpful

Tops* · 11-01-2007, 09:53 AM

Quote:

Originally Posted by godzillarb

My RB is a fatass

Are you a fat ass?

Get some.

mRclARK1 · 11-01-2007, 10:12 AM

Street driven = Leave it alone
Track Only = Tear it apart, strip it, and add even more power.

I drove a stripped car on the street for awhile... it sucks balls. lol

godzillarb · 11-01-2007, 10:16 AM

Quote:

Originally Posted by kognition

This is going to knock the carbon fiber door crowd into the ground, permanently.

I will subscribe to this thread, and post my link next week.

Great, that's exactly what I was looking for.

Quote:

Originally Posted by Tops*

Are you a fat ass?

Get some.

Ahh classic Zilvia... and for your information, I'm not a fatass. I tip the scales right at about 150lbs.

Quote:

Originally Posted by 240FaLKoN

I'm sure stripping out all the amenities hasn't made your car that much more awesome to drive on the street either.

Actually, I like it. I'd rather listen to the sound of a RB going through the gears than some asshole singing about his problems. The racing seats are a little stiff, but that's just fine with me.

projectRDM · 11-01-2007, 10:23 AM

Quote:

Originally Posted by SILVIA_KIDs14.5

hope it helps, also here is another site i stumbled across when i was looking to reductions

HTML Code:

http://www.importmodifications.com/240sxweightred.html

looked legit and helpful

That shit is retarded. The rear seat combined does not weigh anywhere near 39lbs. Maybe if a small child is sitting in it.

mRclARK1 · 11-01-2007, 10:26 AM

True that^^^ The actual seat part of it is pure foam in an S13. Weighs MAYBE 5-8lbs.

godzillarb · 11-01-2007, 10:32 AM

^^^ same in the s14, rear seats are light as hell.

fromxtor · 11-01-2007, 10:54 AM

Quote:

Skinning the door:

Theres your door answer

89dc240 · 11-01-2007, 11:09 AM

Does doing that to your door really reduce much weight?

10-31-2007, 09:46 PM	#1
godzillarb Zilvia Junkie Join Date: Jun 2005 Location: Destin, FL Age: 35 Posts: 487 Trader Rating: (0) Feedback Score: 0 reviews	Advanced Weight Reduction Questions S14 SE chassis. The car is driven on the street but is mainly used for grudge racing at the local drag strip (aka people who think their 80k Viper is fast). For starters I did all the normal stuff like removing the interior, radio, a/c, heater, carpet, wiring, jack, spare, bumper support, airbags, sound deadening, titanium exhaust (ok ok, not normal), light wheels, coilovers, seats, ect. The sunroof will be plugged soon along with getting a lighter hood. I know there are CF doors, but come on, $1600? I'd rather spend that on internals. With that said, I've heard a couple guys talking about cutting out the metal supports in the doors. I think they're referring to the extra metal skin that's on the door. Does anyone have pictures of someone that has done this? The ability of the plastic door pieces going on is not an issue. Also, exactly what parts of the interior metal can be cut out... one guy said something about the metal in between body panels? Without going to a CF trunk lid, what if any can be trimmed from the trunk? If anyone has done this stuff pictures would be greatly appreciated. My RB is a fatass __________________ INTENSE POWER RIPPED ME OFF

10-31-2007, 09:57 PM	#3
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Pointless. Add more boost/power. __________________ [email protected]

11-01-2007, 12:57 AM	#5
KA-T_240 Nissanaholic! Join Date: Sep 2005 Location: Moorhead, MN Age: 34 Posts: 1,788 Trader Rating: (0) Feedback Score: 0 reviews	do a custom wiring harness motor and chassis. Thats if you feel capable of such thing. __________________

11-01-2007, 02:05 AM	#8
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	get an S13 much lighter... __________________ Comments should be taken as Opinions not as Statements of Fact

11-01-2007, 07:49 AM	#16
jobestudios Zilvia Junkie Join Date: Sep 2005 Location: Bellingham Posts: 349 Trader Rating: (1) Feedback Score: 1 reviews	Riveted lexan windows fuddawindoe, otherwise you pretty much gotta keep everything inside the door, whereas with lexan you could just chop everything out except the latch that keeps the door closed. Rivet a NACA duct in there if you want airflow to the cabin. __________________ -Jackson.Vaughn.Photography-

10-31-2007, 09:49 PM	#2
Irukandji Post Whore! Join Date: Jul 2004 Location: Compton Posts: 4,268 Trader Rating: (0) Feedback Score: 0 reviews	The lining on the inside of the trunk pretty much weighes NOTHING and will make your trunk super flimsy. I did it on my old car and I regretted it.

11-01-2007, 01:14 AM	#6
tt99ol Zilvia Addict Join Date: Jan 2005 Location: quartz hill CA Age: 34 Posts: 644 Trader Rating: (8) Feedback Score: 8 reviews	put a skid pan across the whole bottom of the car and lose wind resistance, sheet metal is cheap

11-01-2007, 06:04 AM	#12
IIIXziuR Post Whore! Join Date: Apr 2007 Location: Left Hand Path Posts: 2,652 Trader Rating: (22) Feedback Score: 22 reviews	Lexan/Acrylic Glass maybe...especially on the windscreen and backlight. Even the 1/4 Glass

11-01-2007, 07:03 AM	#14
02BRB20 Zilvia Member Join Date: Oct 2007 Location: FTL Posts: 201 Trader Rating: (0) Feedback Score: 0 reviews	redo your wiring

11-01-2007, 09:06 AM	#20
!Zar! Premium Member Join Date: Nov 2004 Location: North Korea Posts: 14,576 Trader Rating: (27) Feedback Score: 27 reviews	Why don't you re-gear your car instead. __________________

11-01-2007, 09:16 AM	#21
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 47 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	My old S14 got down to 2530lbs, and that's without cutting sheetmetal except for the forward parts of the frame rails (where they stick out past the core support) and the front fenderwells. I also had all the OE sound deadening and a full interior. I could have shaved another 100 pounds had I been really serious. Redoing or making a custom wiring harness reduces a few pounds. Aluminum uprights, flywheel, driveshaft all do a little bit. I was even going to go as far as cutting out the spare tire well and laying a thin sheet of tin over the opening, though it would have created some drag back there. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

11-01-2007, 10:12 AM	#24
mRclARK1 Post Whore! Join Date: Sep 2005 Location: Location? Posts: 4,205 Trader Rating: (0) Feedback Score: 0 reviews	Street driven = Leave it alone Track Only = Tear it apart, strip it, and add even more power. I drove a stripped car on the street for awhile... it sucks balls. lol __________________

11-01-2007, 10:26 AM	#27
mRclARK1 Post Whore! Join Date: Sep 2005 Location: Location? Posts: 4,205 Trader Rating: (0) Feedback Score: 0 reviews	True that^^^ The actual seat part of it is pure foam in an S13. Weighs MAYBE 5-8lbs. __________________

11-01-2007, 10:32 AM	#28
godzillarb Zilvia Junkie Join Date: Jun 2005 Location: Destin, FL Age: 35 Posts: 487 Trader Rating: (0) Feedback Score: 0 reviews	^^^ same in the s14, rear seats are light as hell. __________________ INTENSE POWER RIPPED ME OFF

11-01-2007, 11:09 AM	#30
89dc240 Zilvia Junkie Join Date: Nov 2006 Location: Just South of Philly Age: 37 Posts: 352 Trader Rating: (0) Feedback Score: 0 reviews	Does doing that to your door really reduce much weight?

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