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GS-R Weight Reduction

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Old 02-19-2003 | 12:54 PM
  #11  
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Originally posted by FURIOUSGSR01
Your figures are inaccurate, concerning the vehicles weight.
The curb weight for the Integra's are as follows...
yours are even more inaccurate than his..

Manual Tranny:
Hatch:
RS: 2529 lbs (1147 kg)
LS: 2643 lbs (1199 kg)
GS-R: 2667 lbs (1210 kg)
Type R: 2639 lbs (1197 kg)
Sedan:
RS: 2628 lbs (1192 kg)
LS: 2738 lbs (1242 kg)
GS-R: 2765 lbs (1254 kg)

Auto Tranny:
Hatch:
RS: 2570 lbs (1166 kg)
LS: 2685 lbs (1218 kg)
Sedan:
RS: 2670 lbs (1211 kg)
LS: 2780 lbs (1261 kg)

GS/SE = ?, but should be somewhere in between the LS and GS-R.
Old 02-19-2003 | 01:26 PM
  #12  
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I remember reading losing 1lbs off the wheels, is like losing 50lbs off the car... so wheels will make a larger difference. Otherwise, its not really wise to strip a car, you may upset the weight distribution among other things
Old 02-19-2003 | 01:36 PM
  #13  
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also getting things like 2 piece rotors would help you
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Old 02-19-2003 | 01:38 PM
  #14  
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yes, but the thing is that I've noticed that even a few pounds makes a difference
Oh please...you can't be serious. So when pick up a 12-pack, or place a couple of textbooks on the passenger seat or whatnot, you can feel the difference? Dude, you shouldn't be able to feel even 25 pounds in the GS-R.

Removing all that stuff is really stupid unless you
1) are an amazing autoX driver
2) are regularly autoX'ing your car
3) don't really care that all Integra's are simply commuter cars

Why?
Old 02-19-2003 | 03:51 PM
  #15  
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If you are really serious about this, remove your front passenger seat. That thing is really, really heavy.

Note that stripping your interior will put you into the integra-unfriendly Street Modified class for autocross, so even if you do want to compete stripping the interior isn't really helping you any.

Shingo
Old 02-19-2003 | 04:06 PM
  #16  
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Originally posted by eclipse spanker
yes, but the thing is that I've noticed that even a few pounds makes a difference. Before my 12.5 lb wheels, I had some chrome wheels, and man, you can feel the difference !! With the chrome, it was like my car was being held down by a friggin ball and chain....then with the lighter wheels, the car was just way more responsive during acceleration and braking. I know wheels are a little different, because there are many factors at play (rotational mass, etc.), but I just figure that its a good way to reduce your e.t. , even if it is only by one to 2 tenths of a second .
the only reason you are noticing the extra like 10lb's per wheel on the chrome's is because its your WHEELS. the engine needs torque to spin those wheels. its not the same kind weight reduction like you are thinking. if you had 20lb wheels and u changed to 10lb wheels (40lb reduction) your car will notice the difference a HELL OF A LOT more then loosing 40lb's off the car's interior, spare tire, etc. its just not worth it. take out your spare tire and back seats, weigh them and then drive without them to test it out. it wont be nearly as much as loosing weight from the wheels. 40lb's from the wheels total is like 250lb's from the interior. (not exactly, but its a HUGE difference like that)
Old 02-19-2003 | 04:34 PM
  #17  
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on my 94 gs-r i once completely stripped the interior of everything except the dash. the main reason for this was to try and find alot of the rattles and to completely clean the car. while everything was out i decided to see what it would be like to drive it that way. sure i noticed a difference in the performance. mainly in cornering and braking. but it was extremely loud inside the cabin. i could here tiny bits of sand hitting the wheel wells and underside of car. got very annoying.

but i did find most of the rattles and the interior of the car looked almost brand new.
Old 02-21-2003 | 12:16 PM
  #18  
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Interesting discussion…The weight of your wheels can make a huge difference in performance and acceleration. “Rotational Mass” or “rotating weight” directly effects the ability of a car to accelerate. By lightening the rotational mass you can increase your acceleration. This is one reason why there is diminishing performance return on increased rim sizes. The bigger the rim the heavier it gets (usually), now granted there is less tire but it does not make up the weight difference. Now I agree that the combination of increased rim sizes and decreased sidewall lengths on the tire do increase lateral grip of the tire as it does not roll or give as much. However, somewhere around 17” to 18” wheels is were the return starts to drop off and the handling does not get any better with relation to the increased weight. Along these same lines there are other rotational weights that can be reduced to help with increase acceleration. For example clutches and fly wheels (forgive my ignorance on the Honda transmission because most of my experience has come with Porsches). Using lighter weight flywheels and clutch plates allows an engine to rev more freely and can result in increased engine response and decreased acceleration times. Now none of this effects HP or torque.

Your wheel also represent “unsprung” weight. Unspring weight is essentially any weight that the suspension does not support (e.g. parts of the suspension, wheels, tires, rotors, calipers, etc.). By reducing unsprung weight you decrease the work your suspension has to do which improves the handling characteristics of a car. There are probably some after market suppliers that make lighter suspension pieces and lighter rotors and calipers. A good example of unsprung weight and rotational weight savings can be seen in Formula One racing where carbon fiber is used almost exclusively on the suspension pieces. They even have carbon fiber disc for the brakes that save massive amounts of unsprung weight. Additionally most teams use 16” wheels with tires that have extremely stiff side walls to decrease rotating weight yet maintain ultimate grip. Of course their budgets are extreme.

So basically weight of wheels is a two fold problem. One it increases unsprung weight, second it increases “rotational” weight. Even though bigger rims look great, inexpensive, heavy 19” rims will adversely effect performance at the track. Now there are companies that make some excellent lightweight large rims, but they are usually quite expensive. There is a racing saying: Inexpensive, Durable, and Light weight….pick two because you can’t have all three.
Old 02-21-2003 | 12:25 PM
  #19  
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Originally posted by bet993
There is an racing saying: Inexpensive, Durable, and Light weight….pick two because you can’t have all three.
best quote in this forum :thumbup:
Old 02-21-2003 | 12:27 PM
  #20  
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thanks alot for your input guys



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