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NedHan79
Hockenheim
Joined: 08 Nov 2018
Posts: 713
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 Posted: Sun Nov 17, 2019 2:47 pm Post subject: Acceptable weight loss
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I’ve been going through the ela thread on here. I’ve not finished it yet but I’m getting there. My cars an ongoing project and restoration of sorts. A lot of mods done but a lot more to do.
What I want to know is, has anyone here done the basic weight saving things and actually noticed the difference?
At the minute my mods are full ss headers, 200 cell cats and silencers, air box mod, iridium plugs and sure fire coil packs. Home modified engine mounts. I’m removing the full air con system as it’s past it and I never use it to fix it.
Spax lowering springs on m030 shocks, black Series powerfex arb bushes front and rear, Rear arb modified and adjustable. new spyder performance coffin arms with modded bushes. New Sachs top mounts on front shocks with
Modded bushes.
Probably loads more done but can’t think now.
What I’m thinking of doing to save weight is removing-
Spare wheel and tool kit
Radio and all speakers(can’t hear it anyways)
One of the radiator fans like a gt3 rs (I will be fitting the ltt)
Seats at some stage when the budget allows
Wiper delete already done
Light weight flywheel
I’m open to suggestions but I still need it child friendly. I’m ok with removing some sound deadening but I won’t be changing carpet.
Also worth noting, I have a sunroof and always use this so it’s definitely a keeper. My car is a 1998 aero c2 manual.
All ideas welcome but the budget is the big thing here
Thanks
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#modified996mk1
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Phil 997
Le Mans
Joined: 05 Dec 2015
Posts: 15732
Location: Bournemouth,Dorset
2009 Porsche 997 Carrera 4S
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| Posted: Sun Nov 17, 2019 4:01 pm Post subject:
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If the car isn't a daily and you can keep it on a trickle charge , theres a big saving removing the OE battery and fitting a small light race battery , ELA(Richard saved a lot something like 20lbs when he did it ) but I talked about it with him when we met in Germany and he did say it wouldn't be good for me as mines a daily . 
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911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.
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GMG
Nürburgring
Joined: 07 Jan 2018
Posts: 478
Location: Devon
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| Posted: Sun Nov 17, 2019 4:13 pm Post subject:
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...weight saving...why?
Unless you reduce the weight significantly what exactly is the point ? I doubt that you will even notice it ?
Cost v Value 
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Alex
Le Mans
Joined: 06 Mar 2014
Posts: 17309
Location: The Ribble Valley, Lancashire
2000 Porsche 996 Carrera 4
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| Posted: Sun Nov 17, 2019 4:18 pm Post subject:
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I notice my car's slower with the hard top on.......and that doesn't weigh much.
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2000 Manual 996 C4 Arctic Silver Convertible
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NedHan79
Hockenheim
Joined: 08 Nov 2018
Posts: 713
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| Posted: Sun Nov 17, 2019 4:46 pm Post subject:
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Phil997
I meant to add the battery to the list. Mine seemed to be a bigger one than standard so a good saving there. It’s not a daily and I have a c-tek so that’s covered.
GMG
This is why I’m asking. I know every little helps and all that but is it worth the while. It’s not going to cost much as most of it’s just my own labour.
Alex
What is the weight difference?
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#modified996mk1
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Dammit
Indianapolis
Joined: 23 Sep 2016
Posts: 2472
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| Posted: Sun Nov 17, 2019 4:59 pm Post subject:
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33kg for the hard top, it's not nothing. I reckon a drop in the road, engine and exhaust noise will also make the car feel slower.
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My 996, AKA Project Ridiculous
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Alex
Le Mans
Joined: 06 Mar 2014
Posts: 17309
Location: The Ribble Valley, Lancashire
2000 Porsche 996 Carrera 4
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| Posted: Sun Nov 17, 2019 5:22 pm Post subject:
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I know Peter S has said exactly the same about his Gen 2 cab with the HT on.
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2000 Manual 996 C4 Arctic Silver Convertible
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NedHan79
Hockenheim
Joined: 08 Nov 2018
Posts: 713
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| Posted: Sun Nov 17, 2019 5:34 pm Post subject:
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I’d be aiming for around 50kg reduction. Is it worth the hassle?
Anyone removed sound deadening and kept original carpet?
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#modified996mk1
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Alex
Le Mans
Joined: 06 Mar 2014
Posts: 17309
Location: The Ribble Valley, Lancashire
2000 Porsche 996 Carrera 4
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| Posted: Sun Nov 17, 2019 5:36 pm Post subject:
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| NedHan79 wrote: | I’d be aiming for around 50kg reduction. Is it worth the hassle?
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work out the BHP/tonne, should be easy enough. From that you should be able to roughly work out the 0-60 gain.
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2000 Manual 996 C4 Arctic Silver Convertible
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Robertb
Dijon
Joined: 01 Sep 2003
Posts: 7574
Location: South Oxfordshire
2002 Porsche 996 Carrera 4S
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| Posted: Sun Nov 17, 2019 5:58 pm Post subject:
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I reduced my own weight by over 20kg by taking up cycling. 
Other than that, every time I take wheels off or change brake discs I’m struck by how heavy they are... surely something to lose there?
Fuel weighs a kilo per litre. So put less fuel in.
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"911- the guilt-free supercar"
Current: 2003 C4S Coupe, seal/black
Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
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NedHan79
Hockenheim
Joined: 08 Nov 2018
Posts: 713
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| Posted: Sun Nov 17, 2019 6:10 pm Post subject:
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I could def do with 20 kilos off 
By the time this is back on the road I’d more likely be up 20.lol
Rough calculations on the car being 1380kg to start with are 215hp/tonne. That’s with my dyno figures of 298hp. Take 50-60kgs off and your up to about 225hp/tonne. Dosnt sound like much but it’s more for fun than out right speed.
I’ve also to consider that I should be down a few kgs with the after market cats and exhaust
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#modified996mk1
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Alex
Le Mans
Joined: 06 Mar 2014
Posts: 17309
Location: The Ribble Valley, Lancashire
2000 Porsche 996 Carrera 4
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| Posted: Sun Nov 17, 2019 6:17 pm Post subject:
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Petrol's 0.7kg per litre (sorry for being pedantic  )
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2000 Manual 996 C4 Arctic Silver Convertible
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Winny911
Montreal
Joined: 13 Dec 2012
Posts: 596
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| Posted: Sun Nov 17, 2019 6:24 pm Post subject:
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If you want to lose weight you should consider things like:-
Carbon roof doors bonnet boot bumpers
Plastic windows all round
Remove interior trim and sound deadening
Take the leather off the dashboard
Drill out any steel panels
There is loads that can be done to save weight
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Robertb
Dijon
Joined: 01 Sep 2003
Posts: 7574
Location: South Oxfordshire
2002 Porsche 996 Carrera 4S
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| Posted: Sun Nov 17, 2019 6:27 pm Post subject:
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| Alex wrote: | | Petrol's 0.7kg per litre (sorry for being pedantic ) |
Not at all... interesting, not realised it was lighter than water... guess it makes sense as petrol floats on the waters surface.
_________________
"911- the guilt-free supercar"
Current: 2003 C4S Coupe, seal/black
Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
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sp1ke
Trainee
Joined: 07 May 2009
Posts: 87
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| Posted: Sun Nov 17, 2019 7:04 pm Post subject:
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if you're aiming for a 50Kg weight reduction & want to gauge the potential improvement, then try it the other way around.
Take a 50Kg passenger for a spin & see if you can feel the difference with & without the passenger.
I know it's not the same as losing 50Kg, but it'll give you a rough feel for the difference you could expect.
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2001 996.2 C2
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Cunno
Indianapolis
Joined: 13 Dec 2008
Posts: 2374
Location: Nottinghamshire
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| Posted: Sun Nov 17, 2019 7:07 pm Post subject:
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One tip if you haven’t done so already is weigh the car first. 1380 kg sounds low for a running car.
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Porsche is for driving not for washing.
Present Car: 2006 3.6 Porsche GT3 997(White)
Ex: 2006 3.4 Porsche Cayman S (Silver)
Ex: 2001 2.7 Porsche Boxster (Seal Grey)
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NedHan79
Hockenheim
Joined: 08 Nov 2018
Posts: 713
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| Posted: Sun Nov 17, 2019 7:10 pm Post subject:
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Winny911 the key word here is budget. I’ll look at sound deadening simply because I’ll have to strip the carpets back to weld new studs on the under side of the floor.
On that note, I might look at aluminium covers for under the floor as my own are cracked and broken and I could make them a lot cheaper than replace them 
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#modified996mk1
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Dammit
Indianapolis
Joined: 23 Sep 2016
Posts: 2472
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| Posted: Sun Nov 17, 2019 7:16 pm Post subject:
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I didn't weigh my drivers seat, but it's significant - at least as much as the hardtop I'd say. The Recaro I fitted to replace it is ~6kg, plus a bit for the base.
I'd say you'd save an easy 50kg by swapping the seats, potentially the same again stripping the cabin out - but for a road car that'd make it a miserable place to spend time.
Take the easy wins - which to me would be seats, spare wheel (sealant and a pump instead), maybe battery if you can keep it on a tender.
Now if it's an out and out track car, bin the whole interior, doors, wings, bonnet, boot lid, air con, hydraulic power steering, etc etc and replace the body panels with fibre glass.
But it'd then be fit only for driving half an hour to the track.
I think for a road car take the easy wins on weight then attend to the power - its power-to-weight after all, so look at both sides of the coin.
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My 996, AKA Project Ridiculous
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NedHan79
Hockenheim
Joined: 08 Nov 2018
Posts: 713
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| Posted: Sun Nov 17, 2019 7:33 pm Post subject:
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Had a very quick look at the numbers which I blatantly stole from Ela’s thread. I’m easily looking at 85-102kgs depending on battery choice and a few other bits that I already have on(cats etc). This is without touching sound deadening so maybe a little more but I don’t want to ruin it. It’s more than loud enough.
This is a weekend toy at the end of the day, hopefully a track day or 2 but won’t be many due to time constraints
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#modified996mk1
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Alex
Le Mans
Joined: 06 Mar 2014
Posts: 17309
Location: The Ribble Valley, Lancashire
2000 Porsche 996 Carrera 4
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| Posted: Sun Nov 17, 2019 7:37 pm Post subject:
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I saw someone recently in the FB 996 group do a electric power steering pump in the frunk mod. That'll save a few kilos once you get rid of the original pump and all that pipework.
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2000 Manual 996 C4 Arctic Silver Convertible
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