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How much do you save by going to body kits?

 
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Which car to buy?  



Joined: 24 Mar 2003
Posts: 163

PostPosted: Sun Nov 23, 2003 8:06 pm    Post subject: How much do you save by going to body kits? Reply with quote

Removing the steel bodies and putting on fiberglass in it's place. Hood, fenders and doors too. How much can you really save? 100 lbs? 200? How much weight can you drop if you do the interior too? Have a couple of sport seats, carpet stays, sound insulation goes out along with the radio, speakers and tape console. I would want it to look like a normal car{ ie keep the carpet} Anyone have weights of these parts? If I toss the rear seat, what can go in it's place? I don't want it to look weird.
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Vince Ponz  



Joined: 02 Nov 2002
Posts: 3581
Location: Florida

PostPosted: Mon Nov 24, 2003 1:28 am    Post subject: Reply with quote

stock seat to race 30 to 10-20
rugs and insulation 40
interior parts 7
rear seat and back 20
rear mat and insulation 10
front and rear bumpers to Euro mounts 3.5 -8oz
US rubbers ea 3 lbs to Euro rubber about 4 oz ea for large 2 small
bumpers 25 to 11-12
Go on a diet lose 50 lbs
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77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock
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Kenodog  



Joined: 25 Jun 2003
Posts: 2584
Location: Vancouver,B.C.

PostPosted: Mon Nov 24, 2003 4:46 am    Post subject: Reply with quote

Getting a fibreglass hood saves around 25
cutting down bumper shocks or making new brackets out of aluminum saves 20
rear hatch glass to Lexan 40-50
remove AC and all peripherals 75-80
Aluminum rad from an early 944,racing seats,plastic gas tank from a 944 etc. The list of possibilities is endless.For $3000 and some shopping around I think you could get it down to a respectable 2100-2200 lbs.
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1981 931, Sabine
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2016 DR650
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Dez  



Joined: 25 Jul 2003
Posts: 189
Location: Wokingham, UK

PostPosted: Tue Nov 25, 2003 10:18 pm    Post subject: Reply with quote

Vince,

Do you have anymore pics of that fine car of yours?
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CBass  



Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada

PostPosted: Tue Nov 25, 2003 11:05 pm    Post subject: Reply with quote

There is weight to be saved elsewhere too, converting the headlights to fixed buckets, converting to a coilover in the rear, with a Kokeln style rear crossmember.

Vince, how do you figure the rear mat is 10 lbs? Maybe your car had a lighter one than mine, but it weighed at least 30-40lbs.

GT Racing claims that you can drop about 50 lbs by converting to fiberglass bumpers. Their fenders weigh 4 lbs each unpainted, so that has to be quite lighter than stock, anyone know offhand how much a 924 fender or 1/4 panel weighs? They also claim a stock hood is 80 lbs, but I don't think it is. Before I replaced my hood hinges, I had to lift that hood on and off several times a week, and it's no 80 lbs.

http://www.gt-racing.com/catalog/gtr944.htm

People have weighed their sound deadening after removing, it's between 70-80lbs, IIRC. The bottom half of the rear seats don't really weigh anything, all the weight is in the top half. I put in new seats from a Mazda RX7, and they weigh about 20 lbs each, vs 35 or so for the highbacks, so that drops 30 lbs right there.

My goal is to get down to around 2100 lbs with a full interior, full glass and metal fenders. This involves swapping in an engine that is 80lbs lighter, making new suspension arms from tubular aluminum, and everything mentioned above.
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Neil924  



Joined: 18 Mar 2003
Posts: 4225
Location: Canada

PostPosted: Tue Nov 25, 2003 11:19 pm    Post subject: Reply with quote

It says you save about 27 lbs per fender.
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1982Porsche924  



Joined: 14 Nov 2002
Posts: 679
Location: Cupertino, CA

PostPosted: Wed Nov 26, 2003 4:01 pm    Post subject: Reply with quote

the fiberglass fenders weigh almost nothing. A 4 year old could have lifted them. The stock fenders are about 25 lbs each. Substantial difference, and you get to have bigger wheels/tires.
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1979 Porsche 924 "S"
Engine: Euro pistons, Light Flywheel, Weber TB, Bursch Header, Cam Wheel
Suspension: Front coil-overs, adj sways, Solid bush. Thicker tors. bars, 5-bolt, BBS rims
Body: Fiberglass widebody kit, 931 Nose
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OR_Sunset  



Joined: 04 Jan 2003
Posts: 312
Location: Veneta, OR

PostPosted: Wed Nov 26, 2003 7:13 pm    Post subject: Reply with quote

Okay, so if we can get a definitive figure like "a body kit (fenders, bumpers, 1/4 panels, rocker panels, headlight buckets) saves X lbs. weight"

can we then get $XXXX gets you 0.XX sec. faster 0-60 or ET times?

What is the dollars to decimals relationship here?
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Neil924  



Joined: 18 Mar 2003
Posts: 4225
Location: Canada

PostPosted: Wed Nov 26, 2003 7:48 pm    Post subject: Reply with quote

OR_Sunset wrote:
What is the dollars to decimals relationship here?


Probably crappy.
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Lizard  



Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada

PostPosted: Thu Nov 27, 2003 3:02 am    Post subject: Reply with quote

why dont you weight it, then convert and weight and find out.
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ryoji  



Joined: 10 Oct 2003
Posts: 168
Location: NNJ

PostPosted: Thu Nov 27, 2003 3:23 am    Post subject: Reply with quote

Last time when I estimated for non-metal body parts; $8.5 per lb save, with least expensive sellers. With shipping and some instration parts etc, I think it could go up to $10 per lb. I think you get close to 8hp per 100+lb, isn't it?
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