Got my s13 coupe weighed

[Onizuka]

Went over to phoenix performance this last wednesday, great shop. They race-prep C6 corvettes and Cadillac CTS's and such for SCCA national racing, and their cars win ALOT. So I figured this would be a good place to get my car aligned for autocross, along with doing the corner weights and fixing my front wheel wells so they stop eating my tires under hard cornering.

Anyways....

Total weight: 2558Weight with driver: 2733 (+175)

Weight savings:-Aluminum block (SR)-Aluminum flywheel-Aluminum driveshaft-Silvia front end-Carbon Fiber hood-Silvia Bumper support-Removed rear seat-Removed rear seatbelts-Removed trunk interior-Removed spare tire-Half sized battery

Other weight factors-Full AC system-Half tank of gas-All sound deadening still present-Full Stock interior (besides the previously mentioned)-Still have power steering-Stereo still present (headunit, 4 speakers and power antenna)

My goal is 2400 pounds, which is street modified class minimum weight for RWD, sub 3 liter forced induction cars.

[Florida240sx]

another 158?Hmm don't quite see it ahppening.well maybe...a/c was it 58lbs removal for whole system?power steering i thought was like 22/32. how much do race seats save was it 34lbs? And then could get alum driveshaft.Speaker system weighs total what 16lbs? 10lbs of speakers and then antenna and HU.It can be acheived but trying to think of a way to keep your tunes and power steering.

[Structure240sx]

you can do it, i know you can

its awesome to see people get more serious about racing, wish my schedule allowed for it

[Nismo_Freak]

Went over to phoenix performance this last wednesday, great shop. They race-prep C6 corvettes and Cadillac CTS's and such for SCCA national racing, and their cars win ALOT. So I figured this would be a good place to get my car aligned for autocross, along with doing the corner weights and fixing my front wheel wells so they stop eating my tires under hard cornering.

Anyways....

Total weight: 2558Weight with driver: 2733 (+175)

Weight savings:-Aluminum block (SR)-Aluminum flywheel-Aluminum driveshaft-Silvia front end-Carbon Fiber hood-Silvia Bumper support-Removed rear seat-Removed rear seatbelts-Removed trunk interior-Removed spare tire-Half sized battery

Other weight factors-Full AC system-Half tank of gas-All sound deadening still present-Full Stock interior (besides the previously mentioned)-Still have power steering-Stereo still present (headunit, 4 speakers and power antenna)

My goal is 2400 pounds, which is street modified class minimum weight for RWD, sub 3 liter forced induction cars.

Nice Matt, I spent my last class period writing out weight reduction on my coupe haha.

Don't forget, lighter battery, carbon trunk, removing seats, etc.

[eddiec]

the best weight to lose is rotational weight, ie. lighter wheels. might only be a few pounds, but what a difference.. i havent read the SM rules but if 2 piece rotors are allowed the you could lose some weight there.

[Onizuka]

Brakes are pretty much unlimited as long as they attach to factory points. I have Z-brakes sitting in a bucket (all for corners) with the rear aluminum uprights waiting to go on and have been researching 2 peice rotors. Nothing is availible that bolts right on. Huge bummer.

[Slo_240sx]

Drink up on some slim fast you'll get there bro. Beautiful work!-Alex

[Florida240sx]

Doesn't the rotational weight theory apply only when you are moving?

[Hijacker]

The Saw-zall can be your friend.

but seeing all of that makes me cry about how heavy my vert is. Even sans A/C. Of course, once I get the rollbar put in, I can ditch the heavy doors and drop a significant amount of weight that way.

[Florida240sx]

I'm adding weight to my vert.Read my party vert thread

[turtl631]

Doesn't the rotational weight theory apply only when you are moving?

Yes....but if you are stationary, who cares how the car is acting?

Maybe you meant accelerating rather than moving. I'd imagine that rotational weight savings are most important while accelerating in the first few gears.

Back on topic...cool post. Weight reduction is a funny thing, I've seen people go crazy trying to shed ounces in their cars, removing extra bolts from engines, cutting "speed holes", etc. Nismo Freak, do you have any old posts on weight reduction in your s14? If i recall that thing was pretty stripped out.

[240marcuSX]

man thats heavy, i thought they were ligther than that. im afraid of how heavy mine is now, thanks, lol

[InsanityInc]

man thats heavy, i thought they were ligther than that. im afraid of how heavy mine is now, thanks, lol

Uh, do you drive a lotus or a TVR? 2550 is quite light.

[240marcuSX]

only on the weekends.

i thought they were close to that weight stock. i guess i was just based off some mis-information

[Florida240sx]

Ok I understand what you meant now. We were looking for a way to get him under his goal. And thought you meant tha 5lbs of weight loss will equal 12.5 on the scale. But yes it will be a more effective weight loss because it will increase performance and less stress unlike most of everytting else which is normal weight.I was tryign to get him to his goal you were giving advice to increase his performance of his car by losing weight.

[nismofly]

they weigh around 2700 stock

[nismofly]

Nothing is availible that bolts right on. Huge bummer.

project mu, but theyre like $800 a set

[Dori Dori]

Brakes are pretty much unlimited as long as they attach to factory points. I have Z-brakes sitting in a bucket (all for corners) with the rear aluminum uprights waiting to go on and have been researching 2 peice rotors. Nothing is availible that bolts right on. Huge bummer.

DBS in Au

[USsil80]

get harness and racing seats.. and remove all factory sliding seat belts..also look at removing extra wire out of the car that is going to stuff that you aren't going to use... my strip all the wire out and get a painless wiring kit .....then get the hole saw out and go to town...... get a sander and go to town on the under coating on the bottom of the car too... take a while to do .. then just spary paint it to keep it from rusting...don't forget all the crash bars that are in the doors and under the dash .. could lose alot there .. go to manual windows and such .. well that is all i can go with now .. tired as hell soo.. i am shooting for 2400 with me in it... good luck hope some of this helped

[turtl631]

Yup, 240s are little pigs They're actually in a weird spot, sandwiched between pretty much any civic or integra, miata, etc (super light) and bigger/newer cars that are 3000+ (i.e. supra, evo viii, z32, sti, wrx, vette, etc). It would be nice if they were closer to 2600 stock. I'd like to see some 240 weights and lists of removed stuff.

[sleepyRPS13]

i guess if you go to the bathroom before you race you can shed like 15lbs of poop & piss

[Onizuka]

I'm always racing back from the port-o-pot before I make my runs

2550 is pretty damn light, concidering BMW 3-series that dominate this class nationally start out at around 3000-3200lbs (making 2400 near impossible without a really big budget). Also remember, I still have a ton of crap in my car, A/C even.

[D Money]

the a/c needs to go!

[Onizuka]

DBS in Au

Link? I cant find it

Edit: Never mind, i managed to find out its DBA

[Onizuka]

I just looked through DBA's 2004 catalog, they dont offer the DBA-5000 rotors for the Z32. Looks like Project Mu is the only company and they are $580 before shipping from japan for just the front rotors.

[Nismo_Freak]

Biot makes the rotors as well.

~$930 MSRP

2 - 310x30mm Two-Piece Rotors2 - Adaptor Brackets for Nissan 4-Piston Calipers

Replacement disc's are in the $600 range though.

I personally think it's alot of money towards little gain.

You save approx. 2-3 lbs. tops per rotor, and for the money you spend on the rotor which is all centralized rotational weight, you can spend that same money on lighter wheels which would make more of an effect.

However I might be making some phone calls to a few people I know to see if I can't get something working.

[mgp87zxt]

Weight removed:

Full AC system, "lines, condensor, compressor, Dash controls"

stereo and ac controls

speakers

Ac and heater cores, fan

Rear Exhuast and cat convertor "it is going to be side pipe, but for now its a 3 inch glass pack at where the cat would be.

Power steering pump and lines "looped with 3 inches of -3an hose to keep the rack wet"

Rear seat, seatbelts and mouinting brackets

Rear carpet,

spare tire and tools

Front bumper support "temp, not safe!!"

Future plans:

Lighter seats,one seat , or even one light seat

Lighter wheels

maybe 10 gallon fuel cell.

light weight battery

lighter muffler 3inch I/O

With that said our s13 has an rb20det with r32 mounts and we needed to transplant some more weight to the rear of the car, so we put the battery and 10lb tank for the nx system in the back.

Still need to have the car put on the scales again to see what its at now.

[Nismo_Freak]

Wilwood is working on a 13" big brake setup due out late summer - ~$1000

Few other places I called were moving away from the 2-piece rotors due to low sales

[nismofly]

id probably still get the stoptech kit when i get my real big front brakes

or endless if i hit the lottery

[Onizuka]

This is the thing, people are paying upwards of $3500 for brembo kits and the like, when effective stopping power probably isn't any better than a 240sx equiped with Z32 brakes and GOOD set of brake pads. If someone would domestically make a set of 2 peice Z32 rotors for around 200-250 a corner (including ones for the rear), I would most definatly be interested!

I'm going to go take out my AC and weight it later, I'll report back in then