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Author Topic: Ways of reducing the weight of our cars  (Read 50077 times)

Offline sub39h

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Re: Ways of reducing the weight of our cars
« Reply #90 on: October 24, 2011, 11:03:15 pm »
TT 312mm - 14.5 kg 
GTI 312mm - 15.6 kg* 

why is there a difference here?
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DSG | Rear Parking Sensors | MFSW | BOSE | Auto lights/wipers | Half leather
MODS : '09 tail lights | TT vents | Bilstein B14 | RNS-E 2010 | AMI | AKS Tuning custom CAI | Titanium BBS VZs | NQS BBK | WALK | Autotech RARB | Bluemotion aero | Blueflame TBE | Autotech HPFP | MY11 Wing Mirrors | Bluetooth | S3 Intercooler
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Offline fuscobal

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Re: Ways of reducing the weight of our cars
« Reply #91 on: October 25, 2011, 08:20:00 am »
Odyssey ER40 has 27.5lbs(12.5Kg), 43-45Ah, 500 CCA
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Offline rex

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Re: Ways of reducing the weight of our cars
« Reply #92 on: October 25, 2011, 09:22:52 am »
TT 312mm - 14.5 kg 
GTI 312mm - 15.6 kg* 

why is there a difference here?

What type of TT are we talking about?
The new one (2.0T) or the old one (1.8 T)?
If it's the old one, the discs bell is different (smaller on the TT) which might explain the weight difference.
Just a thought. If I am mistaking please don't shoot.

Offline Bikerz

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Re: Ways of reducing the weight of our cars
« Reply #93 on: October 25, 2011, 10:20:28 am »
New TT I guess as old one is 5x100
Ah but new S3 is 345mm disks so I guess old? Oh Im sooo confused!
« Last Edit: October 25, 2011, 10:47:41 am by Bikerz »

Offline vRSAlex

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Re: Ways of reducing the weight of our cars
« Reply #94 on: October 25, 2011, 08:28:38 pm »
Does anyone know where to get the battery terminal adaptors that screw into the m6 terminals on racing batteries that go to normal terminals?

I have some tt hubs/uprights to fit so I will get some weights on them too.  TT uprights mount the ball joint lower than the s3 hubs  :happy2:
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Offline Tfsi_Mike

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Re: Ways of reducing the weight of our cars
« Reply #95 on: October 25, 2011, 10:39:33 pm »

Try Paul Adams at Linden batteries  :happy2:

Offline sub39h

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Re: Ways of reducing the weight of our cars
« Reply #96 on: October 25, 2011, 11:01:50 pm »
could someone explain something to me:

i've heard before that reducing unsprung weight is more important. now for rotational masses (brake discs, bells, wheels) i understand why this is the case. but why would non-rotational unsprung weight be any different to sprung weight?
2006 Phantom Black A3 2.0T S-Line
DSG | Rear Parking Sensors | MFSW | BOSE | Auto lights/wipers | Half leather
MODS : '09 tail lights | TT vents | Bilstein B14 | RNS-E 2010 | AMI | AKS Tuning custom CAI | Titanium BBS VZs | NQS BBK | WALK | Autotech RARB | Bluemotion aero | Blueflame TBE | Autotech HPFP | MY11 Wing Mirrors | Bluetooth | S3 Intercooler
PLANS: Stage 2+

Offline danishmkvgti

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Re: Ways of reducing the weight of our cars
« Reply #97 on: October 25, 2011, 11:37:41 pm »
could someone explain something to me:

i've heard before that reducing unsprung weight is more important. now for rotational masses (brake discs, bells, wheels) i understand why this is the case. but why would non-rotational unsprung weight be any different to sprung weight?

Rotational mass is important to reduce for 2 reasons:
1: the centrifugal force, the less rotational weight you have the lighter will the steering be.
2: The total mass the springs/Dampers has to move/control, this is both rotational and non rotational mass. the less weight the springs/dampers has to control the easier their job is. You try to lie flat on a high bench and move a 20 pound weight fast up and down in one of your arms, see how long you can do that, then after you have rested try again with a 5 pound weight and see how long before you get tired. The more weight the dampers has to control the warmer they get as the more mass the more friction there will be in the damper to control which generates to heat and a less effective damper.

Sorry for the way i explain it, but i hope you understand the meaning  :drinking:

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Offline sub39h

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Re: Ways of reducing the weight of our cars
« Reply #98 on: October 25, 2011, 11:56:12 pm »
no that does make sense.

got a few marginal weight saving mods coming up - bought an NQS with machined drilled discs, and BBS VZs which are a tad lighter than my Pescaras. looking forward to seeing how all that affects the car dynamically. probably not by much i suspect, but i reckon it would be noticable.
2006 Phantom Black A3 2.0T S-Line
DSG | Rear Parking Sensors | MFSW | BOSE | Auto lights/wipers | Half leather
MODS : '09 tail lights | TT vents | Bilstein B14 | RNS-E 2010 | AMI | AKS Tuning custom CAI | Titanium BBS VZs | NQS BBK | WALK | Autotech RARB | Bluemotion aero | Blueflame TBE | Autotech HPFP | MY11 Wing Mirrors | Bluetooth | S3 Intercooler
PLANS: Stage 2+

Offline Tfsi_Mike

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Re: Ways of reducing the weight of our cars
« Reply #99 on: October 26, 2011, 12:10:27 am »
no that does make sense.

got a few marginal weight saving mods coming up - bought an NQS with machined drilled discs, and BBS VZs which are a tad lighter than my Pescaras. looking forward to seeing how all that affects the car dynamically. probably not by much i suspect, but i reckon it would be noticable.

the NQs made a substantial difference to the feel of my front end, although I went from the 345Cupra setup that weighs nearly as much as a bungalow lol

im getting used to the improvent now though, guess its time for Dymag wheels, carbon bonnet, wings and Ti shock bodies  :party: :evilgrin: :embarrassed:

Offline sub39h

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Re: Ways of reducing the weight of our cars
« Reply #100 on: October 26, 2011, 12:12:10 am »
no that does make sense.

got a few marginal weight saving mods coming up - bought an NQS with machined drilled discs, and BBS VZs which are a tad lighter than my Pescaras. looking forward to seeing how all that affects the car dynamically. probably not by much i suspect, but i reckon it would be noticable.

the NQs made a substantial difference to the feel of my front end, although I went from the 345Cupra setup that weighs nearly as much as a bungalow lol

im getting used to the improvent now though, guess its time for Dymag wheels, carbon bonnet, wings and Ti shock bodies  :party: :evilgrin: :embarrassed:

wow and how did the braking of the NQS compare to the 345mm set up? must have been strange going down a disc size?
2006 Phantom Black A3 2.0T S-Line
DSG | Rear Parking Sensors | MFSW | BOSE | Auto lights/wipers | Half leather
MODS : '09 tail lights | TT vents | Bilstein B14 | RNS-E 2010 | AMI | AKS Tuning custom CAI | Titanium BBS VZs | NQS BBK | WALK | Autotech RARB | Bluemotion aero | Blueflame TBE | Autotech HPFP | MY11 Wing Mirrors | Bluetooth | S3 Intercooler
PLANS: Stage 2+

Offline vRSAlex

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Re: Ways of reducing the weight of our cars
« Reply #101 on: October 26, 2011, 07:26:49 pm »

Try Paul Adams at Linden batteries  :happy2:

Ordered some from demon tweeks as we have an account.  Came to about 15 quid delivered.  So now I can get my oddessy 40 fitted.  It's been sat on my toolbox for around 6 months and when I put it back on charge it went straight onto fully charged and maintaining!  I will get it on the scales tomorrow.
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Offline fuscobal

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Re: Ways of reducing the weight of our cars
« Reply #102 on: January 07, 2012, 01:26:12 pm »
Rear seatbelt assembly > 2Kg



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Offline the bruce

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Re: Ways of reducing the weight of our cars
« Reply #103 on: January 12, 2013, 09:19:51 pm »
"You get what you pay for."

Offline fuscobal

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Re: Ways of reducing the weight of our cars
« Reply #104 on: January 12, 2013, 10:33:32 pm »
Very good info Bruce. Would the clubsport from Bilstein be available to the general public ?

PS : Didn't finish installing the Reverie wing yet but I reinforced the rear trunck lid to hold the downforce and removed the OEM plastic add-on wich weighed no less than 2.2kg (the 150mm, 1300mm long wing has 0.95kg). In the end it seems I will add no weight to the car with the wing :)
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