Spider weight loss plan

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bluespider262
Posts: 156
Joined: Mon May 25, 2015 11:14 am
Your car is a: 1979 Spider

Spider weight loss plan

Postby bluespider262 » Fri Apr 01, 2016 8:07 am

Hi I'm looking for ideas to shed some pounds from my '79. Here's what I've come up with so far:

1. Exhaust - the stock cat, ANSA resonator, and ANSA muffler must be around 50 pounds combined. I was especially surprised at how heavy the cat was relative to other vehicles w/ newer honeycomb types I've worked on. Will remove all three and just run an aluminum triple-chamber muffler.

2. Battery - AGM type.

3. Rear seat bottom and rear will be removed & replaced with "package shelf" panels made from thin steel or aluminum. I'd like to put a couple of hinged doors on the bottom so I can use it as storage.

4. Aluminum radiator.

5. Remove the spare tire (except maybe longer trips) and wood trunk panels.

6. Front and rear bumpers. 100 pounds combined?

7. Replace steel wheels w/ alloy.

8. Poly seat replacements for the stock front seats.

9. Remove center/radio consoles.

Any other ideas?

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RRoller123
Posts: 6913
Joined: Sun Nov 13, 2011 2:04 pm
Your car is a: 1980 FI SPIDER 2000
Location: PLYMOUTH, MA USA
Contact:

Re: Spider weight loss plan

Postby RRoller123 » Fri Apr 01, 2016 8:34 am

Starter: Replace with a gear reduction starter, not sure of exact figures, but cuts a bundle of pounds, at least 10 or 15.

Aluminum radiator on mine went from about 17 pounds to about 8-1/4 pounds.

Lightened Flywheel went from about 18 pounds to about 8-1/2 pounds.

Aluminum Cam Wheels reduced about 10 pounds between the two.
'80 FI Spider 2000 (rolling "resto")
'74 X1/9 (many years ago)
'79 X1/9 (fewer years ago)
'86 Jaguar XJ6 (2nd Hobby Car)
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/SB
2015 Keystone Montana High Country 343RL

AriK
Posts: 1123
Joined: Sat Apr 02, 2011 7:58 pm
Your car is a: 1979 Fiat Spider
Location: Montreal Canada

Re: Spider weight loss plan

Postby AriK » Fri Apr 01, 2016 9:01 am

During your floor restoration remove all that sound deadening material from the floor pans. You can hardly lift the garbage can after you're all done. There's more modern and lightweight materials it can be replaced with.

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Nanonevol
Posts: 648
Joined: Thu Nov 13, 2014 9:17 am
Your car is a: 1977 Fiat 124 Spider
Location: Medway, Massachusetts

Re: Spider weight loss plan

Postby Nanonevol » Fri Apr 01, 2016 12:27 pm

Alloy wheels differ greatly in weight depending on the alloy. I have 3 magnesium alloy Cromodoras and 1 aluminum alloy copy and the copy is much much heavier.
1977 Fiat Spider
1967 Triumph Bonneville (hardtail chopper)

djape1977
Posts: 986
Joined: Sat Apr 21, 2012 6:08 pm
Your car is a: 1970 fiat 124bc
Location: Belgrade, Serbia, eastern Europe

Re: Spider weight loss plan

Postby djape1977 » Fri Apr 01, 2016 3:34 pm

13" cromodoras are 7-10 pounds each, depending on model. nothing newer doesn't even come close

TX82FIAT
Posts: 1474
Joined: Mon May 03, 2010 11:04 am
Your car is a: 82 Fiat Spider 2000 CSO
Location: San Antonio

Re: Spider weight loss plan

Postby TX82FIAT » Fri Apr 01, 2016 4:13 pm

With the exception of lightweright seats and the heavy bumpers I've done the above. Probably should get rid of those huge bumpers... I know the day I take them off some idiot will hit me. Take all that 79 emmissions stuff off as well and give some consideration to the ditributorless ignition system.
Buon giro a tutti! - enjoy the ride!

82 Fiat Spider 2000
03 BMW M3
07 Chevy Suburban

bluespider262
Posts: 156
Joined: Mon May 25, 2015 11:14 am
Your car is a: 1979 Spider

Re: Spider weight loss plan

Postby bluespider262 » Fri Apr 01, 2016 5:13 pm

AriK wrote:During your floor restoration remove all that sound deadening material from the floor pans. You can hardly lift the garbage can after you're all done. There's more modern and lightweight materials it can be replaced with.


Yep already almost done. So far I've pulled at least 20 pounds of factory sound deadening, about ten aluminum panels with 70+ self tapping screws and an unbelievable amount of roofing tar out of the interior. The only thing worse than the factory deadening is roofing tar. :evil: At least the factory stuff comes out easily, relatively speaking.

bluespider262
Posts: 156
Joined: Mon May 25, 2015 11:14 am
Your car is a: 1979 Spider

Re: Spider weight loss plan

Postby bluespider262 » Fri Apr 01, 2016 5:16 pm

TX82FIAT wrote:With the exception of lightweright seats and the heavy bumpers I've done the above. Probably should get rid of those huge bumpers... I know the day I take them off some idiot will hit me. Take all that 79 emmissions stuff off as well and give some consideration to the ditributorless ignition system.


Yes I feel the same way about the bumpers but then again if someone hits me I don't think those bumpers are going to make the situation that much better either.

All my emissions stuff was removed when I did a 1800 intake/Holley 5200 swap.

bluespider262
Posts: 156
Joined: Mon May 25, 2015 11:14 am
Your car is a: 1979 Spider

Re: Spider weight loss plan

Postby bluespider262 » Fri Apr 01, 2016 5:17 pm

RRoller123 wrote:Starter: Replace with a gear reduction starter, not sure of exact figures, but cuts a bundle of pounds, at least 10 or 15.

Aluminum radiator on mine went from about 17 pounds to about 8-1/4 pounds.

Lightened Flywheel went from about 18 pounds to about 8-1/2 pounds.

Aluminum Cam Wheels reduced about 10 pounds between the two.


Great suggestions thank you.

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johndemar
Posts: 683
Joined: Sun Feb 24, 2008 11:12 am
Your car is a: 1976 Fiat 124 Spider
Location: Phoenix

Re: Spider weight loss plan

Postby johndemar » Sat Apr 02, 2016 11:40 am

How much do you weigh? :D
76 Fiat 124 Spider
One owner since July 20, 1976
Amadio Motor, Jeannette, PA

carl
Posts: 244
Joined: Mon Oct 06, 2008 9:56 am
Your car is a: 1971 128

Re: Spider weight loss plan

Postby carl » Sun Apr 03, 2016 10:39 am

I wanted to build a light weight spider for the street but started with a gutted 73 spider. The only electrics were the gauges, fuel pump, brake lights, ignition and charging system on a home built wiring harness. No center console, no carpets, no sound deadening, no back seat, just the two bucket seats with a painted floor. No heater, no wipers, no top, aluminum door panels. I was even going to remove the door glass but that seemed rather silly unless I kept the car in the garage all the time. I slowly added back the heater wipers top and headlights since I didn't want questionable weather to keep me from driving it on club drives (DCfiats has drives all year long. And I do have a roll bar which is adding weight back in. Oh yea, have two Webers (IDFs) so I'm carrying the extra weight of an additional carb.

On later spiders if you are not removing the heavy bumpers then you are not serious about weight reduction.

carl

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v6spider
Posts: 1025
Joined: Tue Feb 28, 2006 6:57 pm
Your car is a: 4.3L V6 Powered 1972 124 FIAT Spider
Location: Mount Vernon WA
Contact:

Re: Spider weight loss plan

Postby v6spider » Sat Apr 09, 2016 1:41 pm

Boy sounds like your splitting hairs to me.. Build more power.. Don't worry about weight is pretty light already.. Could always get fiberglass trunk, door skins and hood. Like the Abarth..

Cheers!
Rob

bluespider262
Posts: 156
Joined: Mon May 25, 2015 11:14 am
Your car is a: 1979 Spider

Re: Spider weight loss plan

Postby bluespider262 » Sat Apr 09, 2016 7:31 pm

Says the guy with the v6. :mrgreen:

Yeah I know, but there comes a point where squeezing out another 10HP is really costly vs. shedding pounds in these cars. There's not a lot of cars where you can realistically accomplish a 10% weight reduction like these.

Why did you ditch the Fiat DOHC for a 4.3L? I'm guessing because $2000 into that DOHC vs. $2000 into a 4.3 doesn't make sense from a dollars vs. power perspective. I have a 5.7L in my Jeep Wrangler for the same reason. I could have thrown thousands at a Jeep inline six but it still would have only made 2/3 the power of a 350. For me the 350 ended up being cheaper in the end, even with the other swap logistics considered.

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v6spider
Posts: 1025
Joined: Tue Feb 28, 2006 6:57 pm
Your car is a: 4.3L V6 Powered 1972 124 FIAT Spider
Location: Mount Vernon WA
Contact:

Re: Spider weight loss plan

Postby v6spider » Sat Apr 09, 2016 11:42 pm

bluespider262 wrote:Says the guy with the v6. :mrgreen:

Yeah I know, but there comes a point where squeezing out another 10HP is really costly vs. shedding pounds in these cars. There's not a lot of cars where you can realistically accomplish a 10% weight reduction like these.

Why did you ditch the Fiat DOHC for a 4.3L? I'm guessing because $2000 into that DOHC vs. $2000 into a 4.3 doesn't make sense from a dollars vs. power perspective. I have a 5.7L in my Jeep Wrangler for the same reason. I could have thrown thousands at a Jeep inline six but it still would have only made 2/3 the power of a 350. For me the 350 ended up being cheaper in the end, even with the other swap logistics considered.


My V6 puts out over 300hp and over 325ftlbs of torque! It cost me $2500 to build.. It is a clear choice for me.. My total intention was to build this car with the gnarly v6 from the very beginning.. To build the kind of power I'm getting in a twin cam would cost double what i spent.. Lol not to mention the sound of the big roller cam in the v6 is just awesome.. People see my car and dig it right out of the gate.. I have yet to get a negative response.
Image
Cheers!
Rob

beater
Posts: 34
Joined: Fri Aug 17, 2012 8:52 pm
Your car is a: 1977 Spider

Re: Spider weight loss plan

Postby beater » Sun Apr 17, 2016 10:55 pm

I think this is kind of like cyclist that want to have the lightest bike possible but are carrying 20 pounds themselves they don't need LOL :)! Seriously you spend all the money making your Spider lighter and then a buddy jumps in and you are back where you started. Let's face it these are fun cars to drive but short of a power plant swap or gobs of money into the original engine it is what it is.


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