Advanced Weight Reduction Questions - Page 3 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

projectdrifter · 11-06-2007, 05:59 PM

Quote:

Originally Posted by kognition

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.

i cant wait to hear more read more about putting my s14 on a diet.

plus one rep for kognition

chuy · 11-06-2007, 07:21 PM

I have no rep but id love to add to his as well

drftwerks · 11-06-2007, 07:30 PM

back on topic

spool instead of full diff, and wiring harness strip

tre · 11-06-2007, 07:51 PM

who cares how much it weighs. I'd rather rock people in a fully loaded down car :P

Bizzytony · 11-07-2007, 12:26 AM

Haha looks good so far, if you are pulling out the dash there is a small rectangle weight on the back of your firewall. It has no use nissan just put it there. Im not lying. haha my 2 cents.

*kognition* · 11-08-2007, 05:23 PM

Here's some advanced weight reduction for ya. 6lb carbon roof. Booya

If you see me in your rearview this weekend, it's allready too late for you.

jskateborders · 11-08-2007, 06:38 PM

Theres always the option of driver weight loss.
Lean Boleme anyone?

cdlong · 11-08-2007, 07:14 PM

Quote:

Originally Posted by kognition

Here's some advanced weight reduction for ya. 6lb carbon roof. Booya

If you see me in your rearview this weekend, it's allready too late for you.

wow.

did you ever weigh that chunk of the roof?

*kognition* · 11-08-2007, 07:40 PM

Yes, without the sunroof system, it was 50lbs. So add another 25lb's for the sunroof system, and the total weight was 75lb's minus 6lb's for the new roof. It would be a 69 lb total weight drop.

Quote:

Originally Posted by cdlong

wow.

did you ever weigh that chunk of the roof?

yokotas13 · 11-08-2007, 08:01 PM

and off the top of the car which is even better!

*kognition* · 11-08-2007, 08:17 PM

Yup, the benefits of the lowered CG is likely bigger than the actual weight reduction itself.

Quote:

Originally Posted by yokotas13

and off the top of the car which is even better!

kouki_s14 · 11-08-2007, 09:10 PM

i want close up shots! and a price please....

*kognition* · 11-08-2007, 09:39 PM

It is a little rough looking, because i did not have time to prep the mold like i would normally in order to do a vacuum bagging. This was a wet layup just to get a roof on the car for this weekend. And it was still 6lbs. But i did learn a few things with this one that i will make changes for on future ones. But it is rigid, 2 layers of 20oz. 5 harness satin weave. Price is TBD

Quote:

Originally Posted by kouki_s14

i want close up shots! and a price please....

all stock · 11-08-2007, 11:55 PM

nice kognition, looks beautiful. how is it going to attach to the rest of the sheet metal car?
i just worry because cf is brittle and can shatter. don't wanna get impaled by cf in a rollover. i like the rollcage.

to the OP, you can drill out seat/radio brackets. there's quite a few useless ones you can drill the spot welds out of.

UNITEDMASTER · 11-09-2007, 12:32 AM

Nice work there Mike, its about time haha,J/K. I know your real busy with the bread & butter. Now , just let me know when we can do a wet layup for my coupe hahaha J/K but Im serious. I still need to send you those pics . Again nice work, Whats your total weight at now

*kognition* · 11-09-2007, 01:13 AM

Thank's here to A.J. (United Master) for providing me with the spare roof clip to do this project with. Please give him rep, as he made a great effort to get this roof to me.
A.J. , i honestly have not had alot of time to scale the car but i would bet we are around 2, 200 lb's somewhere. Doing the Nissan tuner shootout in Jan, so i will probably do some more weight reduction before that. Still waiting on your pics.

Quote:

Originally Posted by UNITEDMASTER

Nice work there Mike, its about time haha,J/K. I know your real busy with the bread & butter. Now , just let me know when we can do a wet layup for my coupe hahaha J/K but Im serious. I still need to send you those pics . Again nice work, Whats your total weight at now

*kognition* · 11-09-2007, 01:20 AM

No it's fine as far as flexing goes because the weave is only going in two axis and not three. A third axis would give you a stiffness that would likely be subjected to stress from chassis flex. Which could cause that kind of stress in the part. We used a 2 part urethane that we use for bonding aluminum honeycomb core to laminates. So it has a very strong bond with the desired flexibility in it. We clamped the pillars with spring clamps overnite while the adhesive cures.

Quote:

Originally Posted by all stock

nice kognition, looks beautiful. how is it going to attach to the rest of the sheet metal car?
i just worry because cf is brittle and can shatter. don't wanna get impaled by cf in a rollover. i like the rollcage.

to the OP, you can drill out seat/radio brackets. there's quite a few useless ones you can drill the spot welds out of.

PoorMans180SX · 11-09-2007, 12:20 PM

Awesome. So freakin awesome.

cdlong · 11-09-2007, 03:21 PM

wait, did you cut out the rear parcel shelf too? it looks like you can see the strut tower in that pic.

Rayne · 11-09-2007, 04:21 PM

Quote:

Originally Posted by cdlong

wait, did you cut out the rear parcel shelf too? it looks like you can see the strut tower in that pic.

The parcel shelf is removed. Look how far back the cage goes into the trunk.

sl4ck3r · 11-09-2007, 05:23 PM

power steering!

projectdrifter · 11-12-2007, 09:07 AM

yummmm very sexy top. thats a ton of weight gone.

*kognition* · 11-13-2007, 09:22 AM

The new roof held up like a champ with zero problems whatsoever. I was very impressed with response during acceleration and coming out of turns with it. No weird sounds or cracking noises. We bonded the roof pillars with our urethane 2 part adhesive. We use this adhesive to bond the honeycomb to laminates for our race splitters. Extremely happy with the results. Because this was a wet layup, i am removing it in order to put a vacuum bagged version onto the car. We got major props this weekend for the roof. Major.

***S14DB*** · 11-13-2007, 10:20 AM

So, when is the full CF S14 Shell coming out?

Tearlessj · 11-13-2007, 10:31 AM

Quote:

Originally Posted by S14DB

So, when is the full CF S14 Shell coming out?

That would be fucking sweet.

projectdrifter · 11-19-2007, 09:33 AM

yes a cf shell would be ohhh so pimp. to bad i could never afford one.

*kognition* · 11-20-2007, 05:11 PM

We just weighed the S14 today before scalling it, 2,227lb's with the new roof replacement. I have easily another 100lb's to remove from it.

Addicted2Kouki · 11-21-2007, 01:01 AM

to the OP....^^^pay attention... thats REAL advanced weight loss.

projectdrifter · 12-31-2007, 11:26 PM

so whats the mod on the doors to shave some weight without going cf.. im still waiting.

*kognition* · 01-01-2008, 01:45 PM

Happy New Year!

This is an involved mod article. And it does require that a mold be made for the door skins of your specific model. As i work on the door skin molds for the S14, i am thinking that i will try to have this writeup published in Modified this Spring.
But if you would like an idea of what is involved, you can read my Scion article online over at Modified.com CLICK HERE to read that with pics.

Quote:

Originally Posted by projectdrifter

so whats the mod on the doors to shave some weight without going cf.. im still waiting.

11-06-2007, 07:21 PM	#62
chuy Zilvia Addict Join Date: Mar 2003 Location: Colorado some where Age: 44 Posts: 623 Trader Rating: (2) Feedback Score: 2 reviews	I have no rep but id love to add to his as well __________________ Slide Happy

11-06-2007, 07:30 PM	#63
drftwerks Nissanaholic! Join Date: Mar 2004 Location: california Posts: 2,343 Trader Rating: (1) Feedback Score: 1 reviews	back on topic spool instead of full diff, and wiring harness strip __________________ giantroboteyes.wordpress.com/

11-06-2007, 07:51 PM	#64
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	who cares how much it weighs. I'd rather rock people in a fully loaded down car :P __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.

11-08-2007, 08:01 PM	#70
yokotas13 Post Whore! Join Date: Apr 2006 Location: Milford, CT Age: 36 Posts: 10,519 Trader Rating: (8) Rides Gallery: yokotas13 Feedback Score: 8 reviews	and off the top of the car which is even better! __________________ 2015 Subaru Outback Overlander - Wagonofdoom

11-08-2007, 11:55 PM	#74
all stock Zilvia Junkie Join Date: Oct 2003 Location: Irvine Posts: 312 Trader Rating: (0) Feedback Score: 0 reviews	nice kognition, looks beautiful. how is it going to attach to the rest of the sheet metal car? i just worry because cf is brittle and can shatter. don't wanna get impaled by cf in a rollover. i like the rollcage. to the OP, you can drill out seat/radio brackets. there's quite a few useless ones you can drill the spot welds out of. __________________ NASA PTD/SCCA ITS

11-07-2007, 12:26 AM	#65
Bizzytony Leaky Injector Join Date: Mar 2007 Location: Hawaii Posts: 136 Trader Rating: (0) Feedback Score: 0 reviews	Haha looks good so far, if you are pulling out the dash there is a small rectangle weight on the back of your firewall. It has no use nissan just put it there. Im not lying. haha my 2 cents.

11-08-2007, 05:23 PM	#66
kognition Premium Member Join Date: May 2004 Location: Santee California Posts: 2,106 Trader Rating: (6) Feedback Score: 6 reviews	Here's some advanced weight reduction for ya. 6lb carbon roof. Booya If you see me in your rearview this weekend, it's allready too late for you.

11-08-2007, 06:38 PM	#67
jskateborders Zilvia FREAK! Join Date: Apr 2007 Location: Tucson AZ Age: 32 Posts: 1,258 Trader Rating: (5) Feedback Score: 5 reviews	Theres always the option of driver weight loss. Lean Boleme anyone?

11-08-2007, 09:10 PM	#72
kouki_s14 Zilvia FREAK! Join Date: Jan 2004 Location: Los Angeles Posts: 1,550 Trader Rating: (0) Feedback Score: 0 reviews	i want close up shots! and a price please....

11-09-2007, 12:32 AM	#75
UNITEDMASTER Nissanaholic! Join Date: Apr 2006 Location: Anaheim Posts: 1,626 Trader Rating: (10) Feedback Score: 10 reviews	Nice work there Mike, its about time haha,J/K. I know your real busy with the bread & butter. Now , just let me know when we can do a wet layup for my coupe hahaha J/K but Im serious. I still need to send you those pics . Again nice work, Whats your total weight at now __________________ MR JACKSON.

11-09-2007, 12:20 PM	#78
PoorMans180SX Zilvia.net Advertiser Join Date: Nov 2005 Location: Michigan Age: 33 Posts: 5,431 Trader Rating: (16) Rides Gallery: PoorMans180SX Feedback Score: 16 reviews	Awesome. So freakin awesome. __________________ Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs.

11-09-2007, 03:21 PM	#79
cdlong Nissanaholic! Join Date: Jun 2003 Location: Colorado Springs Age: 40 Posts: 1,845 Trader Rating: (0) Rides Gallery: cdlong Feedback Score: 0 reviews	wait, did you cut out the rear parcel shelf too? it looks like you can see the strut tower in that pic. __________________

11-09-2007, 05:23 PM	#81
sl4ck3r Join Date: Jan 2007 Location: Missouri/California Age: 36 Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	power steering!

11-12-2007, 09:07 AM	#82
projectdrifter Zilvia Addict Join Date: Feb 2006 Location: myrtle beach,south carolina Posts: 932 Trader Rating: (0) Feedback Score: 0 reviews	yummmm very sexy top. thats a ton of weight gone. __________________ Mouth of the South There are a few mailboxes that have been looking at me the wrong way, lately. Nothing goes unchecked.

11-13-2007, 09:22 AM	#83
kognition Premium Member Join Date: May 2004 Location: Santee California Posts: 2,106 Trader Rating: (6) Feedback Score: 6 reviews	The new roof held up like a champ with zero problems whatsoever. I was very impressed with response during acceleration and coming out of turns with it. No weird sounds or cracking noises. We bonded the roof pillars with our urethane 2 part adhesive. We use this adhesive to bond the honeycomb to laminates for our race splitters. Extremely happy with the results. Because this was a wet layup, i am removing it in order to put a vacuum bagged version onto the car. We got major props this weekend for the roof. Major.

11-13-2007, 10:20 AM	#84
*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	So, when is the full CF S14 Shell coming out? __________________ Comments should be taken as Opinions not as Statements of Fact

11-19-2007, 09:33 AM	#86
projectdrifter Zilvia Addict Join Date: Feb 2006 Location: myrtle beach,south carolina Posts: 932 Trader Rating: (0) Feedback Score: 0 reviews	yes a cf shell would be ohhh so pimp. to bad i could never afford one. __________________ Mouth of the South There are a few mailboxes that have been looking at me the wrong way, lately. Nothing goes unchecked.

11-20-2007, 05:11 PM	#87
kognition Premium Member Join Date: May 2004 Location: Santee California Posts: 2,106 Trader Rating: (6) Feedback Score: 6 reviews	We just weighed the S14 today before scalling it, 2,227lb's with the new roof replacement. I have easily another 100lb's to remove from it.

12-31-2007, 11:26 PM	#89
projectdrifter Zilvia Addict Join Date: Feb 2006 Location: myrtle beach,south carolina Posts: 932 Trader Rating: (0) Feedback Score: 0 reviews	so whats the mod on the doors to shave some weight without going cf.. im still waiting. __________________ Mouth of the South There are a few mailboxes that have been looking at me the wrong way, lately. Nothing goes unchecked.

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