Lightweight drivetrain OR cutaways
#11
06-12-2007 | 03:01 PM
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Joined: Jun 2007
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RE: Lightweight drivetrain OR cutaways
i just put a eurocode lightened flywheel on my car this past weekend, havent pushed it yet cuz i did the clutch too so im breaking that in. But its supposed to free up 10-20 hp, and weighs 11lbs vs. the stock 32lbs flywheel
#12
06-12-2007 | 03:56 PM
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Posts: 21
RE: Lightweight drivetrain OR cutaways
Yeah i didn't want to get too drastic with it either. I know that if i wanted to i could strip EVERYTHING but i want it to look stock inside and out just lose as much weight as possible off of the rotating parts. If each stock wheel weights 30lbs and i buy some that are 15lbs then i saved 60lbs of rotating weight. Just looking at simple physics I=mr^2 then a 30lb wheel would have an inertia of about 8670 lb/in^2 and a wheel weighing 15 lbs would have an inertia of about 4335 lb/in^2. No i don't know how much this will affect things in the real world but when you multiply those numbers by 4 (for each wheel) that is a huge amount of force to overcome that you don't have to.Look at the net difference it is like running 2 of the30lb wheels (which we could see just the weight but i like to look at the forces) so i don't think it would be too much of a straight line difference but a noticeable one. If a flywheel gives you "10-20hp" then i imagine running wheels that are half the weight of the originals should at least free up another usable 10-20hp. Let me know what y'all think.I also was thinking of running straight pipes if i could figure out a way to make it sound decent. That would drop right at 40 lbs. Does anyone know how much a borla or blueflame exhaust weights (i will look but i figured i would put it in here)? My main point is I think that people concentrate too hard on adding HP to their car and not think of other ways to make their cars quicker. In my mind HP will only give you so much, good suspension will only give you so much, ETC but if we add it all up Chip, light wheels, modified suspension so on and so forth it would be cheaper to achieve the same level of performance that we strive to obtain byslamming $6k kits to get 400hp. Maybe i am crazy or maybe other people have just never tried this but as soon as i startpiling up some moneyi will be testing it that is for sure!
ORIGINAL: Vorais
He's correct, about 22lbs. Stock "Fat 5" Wheels weigh in at near 30lbs each. "The Fat 5 wheels come in a polished finish with a thick clear coat and weigh approximately 21lbs each. While certainly not a super-lightweight wheel, they are plenty strong and are actually six pounds lighter than the standard six-spoke TT design wheels." A stereo system can easily add a couple hundred pounds with amps, wiring and boxes. Weight to me is a better thing to remove or at least not add(in moderation on something like an Audi TT where luxury is as important as performance) as not only does it improve your acceleration, it also improves handling as well.
If this was something like my old firebird I would strip out the back seat, the carpet and padding, stereo (used a removable boombox that ran on 12V from a plug in the car for when I wanted tunes), fiberglass shaker hood (hidingfit the roots blower). But that car wasn't very nice to drive around and the only attention it really grabbed was that of other guys and cops with the rare exception of the occassional "fix it upper" woman. Same if Iwas going to build a"go fast" Honda, engine swap and strip it out. However, I purchased this car (and I am sure most others did as well)because of the combination of style, luxury, and decent performance potential that the TT has.
*Editted to correct bad weight info for wheels*
He's correct, about 22lbs. Stock "Fat 5" Wheels weigh in at near 30lbs each. "The Fat 5 wheels come in a polished finish with a thick clear coat and weigh approximately 21lbs each. While certainly not a super-lightweight wheel, they are plenty strong and are actually six pounds lighter than the standard six-spoke TT design wheels." A stereo system can easily add a couple hundred pounds with amps, wiring and boxes. Weight to me is a better thing to remove or at least not add(in moderation on something like an Audi TT where luxury is as important as performance) as not only does it improve your acceleration, it also improves handling as well.
If this was something like my old firebird I would strip out the back seat, the carpet and padding, stereo (used a removable boombox that ran on 12V from a plug in the car for when I wanted tunes), fiberglass shaker hood (hidingfit the roots blower). But that car wasn't very nice to drive around and the only attention it really grabbed was that of other guys and cops with the rare exception of the occassional "fix it upper" woman. Same if Iwas going to build a"go fast" Honda, engine swap and strip it out. However, I purchased this car (and I am sure most others did as well)because of the combination of style, luxury, and decent performance potential that the TT has.
*Editted to correct bad weight info for wheels*
#13
06-12-2007 | 04:17 PM
I'm make believe
Joined: Dec 2006
Posts: 17,587
From: In my head
RE: Lightweight drivetrain OR cutaways
ORIGINAL: zachaTTack
but lightweight drivetrain parts would lessen drivetrain loss as far as whp is concerned how much of a difference would say a lightweight flywheel make
but lightweight drivetrain parts would lessen drivetrain loss as far as whp is concerned how much of a difference would say a lightweight flywheel make
#14
06-12-2007 | 05:22 PM
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Joined: Jun 2007
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RE: Lightweight drivetrain OR cutaways
i read something like that too, butI think it said for every 1lb is 1-1 1/2 hp.I could be remembering wrong, but i think i would notice a 63 hp change when my flywheel went from 32lbs to 11lbs.
#16
06-12-2007 | 07:37 PM
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Joined: Jun 2007
Posts: 83
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RE: Lightweight drivetrain OR cutaways
could very well be. But heres the link to the product that I have, and it says 32lbs.
http://www.ecodetuning.com/shop/cart...tail&p=345
http://www.ecodetuning.com/shop/cart...tail&p=345
#20
06-12-2007 | 08:28 PM
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Joined: Apr 2007
Posts: 1,637
From: NEPA / NYC
RE: Lightweight drivetrain OR cutaways
Doesn't too light of a flywheel hurt performance in some ways also?
I remember seeing a few arguments about how light you should go because of the trade-offs.
But I think those were honda guys too...
I remember seeing a few arguments about how light you should go because of the trade-offs.
But I think those were honda guys too...