Celica Forums General Discussion Exterior Weight Reduction

hmm you know gtec times are about .4 too fast right? you did not do a 13.9.

maybe mid 14 on a real track.

if you can run a 13.9 then you should be at an 8.9 1/8 just fyi if you ever decide to give a real track a try.

I ran 8.964 with the Intake only and an 8.8 with the power fc and a terrible 60' 8.8 was the 13.7's

also trap speed is key. you should be around 79 mph.

since when do you gain HP from weight reduction???

since when do you gain HP from weight reduction???

you forgot one thing. Throw out the girl friend will be easier to reach 120+ pound.

But the back is a dead axle.

I was responding to Lucky's comment about how he said that it was good to have weight in the back and again im argueing that since the celi is fwd, then its not as important as a rwd car.

I was responding to Lucky's comment about how he said that it was good to have weight in the back and again im argueing that since the celi is fwd, then its not as important as a rwd car.

rear weight is best cause you want weight over the tires

Not on a FWD car where you want grip on the front wheels for drag racing...

To find Newtons of force...that is extremely easy. The force changes all through the rpm band, but take your average torque that the engine produces, then figure out the torque at the wheels (using transmission gear ratio and final drive ratio). Then:

Torque = Force*Distance

Change it up to:

Force = Torque/Radius of the tire

That'll give you lbf, now convert that to Newtons (although I don't see why you need to... Instead just use:

Force = Mass*Acceleration

Change it up to:

Acceleration = Force/Mass

So now you have the force in lbf, now you have to change the weight of the car into mass, drop it in the formula and you can compare the AVERAGE acceleration of 2 cars.

Or you could just do the weight/hp, then compare the 2 cars directly... BTW removing weight doesn't increase Hp, it just takes less hp to make it move, so thus giving the feeling of more hp. Besides say a car with:

2000lbs with 200hp = 10lb/hp
Now if you lighten the car to say 1500lbs you get 7.5lb/hp. So when you removed the 500lbs when the car began with the 10lb/hp, the effect the car would have is 50hp, so with that if the car was the same weight and this additonal 50hp, it'd come out with 8hp/lb. Notice how it isn't the same as the predicted 7.5lb/hp, that's because it isn't a linear relationship. Reducing 10lbs on a lightweight car will make a bigger difference than reducing 10lbs on a heavyweight car.

BTW I am a long time Celi.net moderator.

Reducing 10lbs on a lightweight car will make a bigger difference than reducing 10lbs on a heavyweight car.

can i get a sticky on this??

2000-03 Toyota Celica GTS
Stock Weight - 2500lbs
Stock Wheel Weight - 22lbs each/without tires
The 2000-03 Toyota Celica's weigh approximately 2500lbs, dividing by the horsepower of 180, we get about 13lbs/hp.
So roughly every 13 lbs removed from the cars weight will add an effective 1 hp.
Gas weighs about 8lbs/gal so 16 gallons in the tank weighs 128lbs. If you have only 1 gallon in the tank, its almost a 7 horsepower equivalent difference. A passenger can make even a bigger difference, not to mention the drivers weight.
You can easily remove things like the spare tire and jack, the floor mats, the rear seats, interior panels and anything else.

Listed below are some easily removable items:
1. Passenger Seat (37lbs) - Removing the passenger seat is a very easy and effective way to give your Celica a small boost in power. The nice thing is that the seat is only held in place by 4 bolts.

2. Rear Seat (29lbs) - The rear seat is a little more complicated to remove than the passenger seat. When removing just remember where everything goes and it should be easy to put back in place whenever needed.

3. Rear Seat Cushion (10lbs) - The rear cushion should be removed at the same time as the rear seat.

4. Floor Mats/Front and Rear (6lbs) - This has to be the easiest weight reduction available for the Celica owner.

5. Tire Floor Cover (3lbs) - The tire floor cover is right underneath the rear hatch carpeting.

6. Spare Tire and Jack (32lbs) - Another easily removable item.

Total Easy Weight Removal = 117lbs or about a 9hp increase.
Intermediate Skill Weight Reductions

The weight reductions included below can even prove more effective than some of the reductions included above. However, once you start removing these items you are taking away from the cars overall appearance and in some cases its more predominent ammenities.

7. Air Conditioning (40lbs) - Removing the air conditioning will net you a reduction of about 40lbs. Be sure to remove everything from the engine as well as behind the dash. Should be completed by the experienced only.

8. Front Hood (50lbs) - Replacing the Front Hood with a lightweight Fiberglass or carbon fiber hood is a great way to remove some weight around the front end of the car. Total weight reduction will be close to 50lbs or greater depending on the aftermarket hood you choose.. If you dont intend on replacing the entire fron hood you could also remove the sound dampener on the inside of the hood. This should help in cooling your engine a little.

9. Stock Wheels (22lbs each/replacement weight from 11lbs each) - Replacing the wheels is a must for anyone seriously interested in increasing there cars Performance. The stock wheels are quite heavy and can be replaced with a variety of aftermarket models. We would suggest searching for lightweight wheels. Replacing your wheels with lightweight wheels will dramatically increase your cars acceleration. We suggest not going over 17 inches if maximum Performance is what you desire to achieve.

10. Front Drivers Seat (40lbs/replacement weight from 14lbs) - The front drivers seat on the Celica can easily be replaced with a much lighter alternative A lightweight racing seat will save you considerable weight and will also be effective once you have added more horsepower to your car.

Total Intermediate Weight Removal = up to 188lbs or a 14+hp increase.
More Weight Reduction
Some of the things listed below can also be removed or replaced with lighter alternatives than stock.
Stock Flywheel - Can be replaced with lightweight aluminum flywheels or machined down in excess of just 13lbs.

Stock Steering Wheel - Can be replaced with lighter Performance steering wheel with no airbag.

Passenger Airbag Removal - Can save some extra weight as well. (Not recommended for normal driving)

Interior Panels - Both the drivers side and passenger side front door panels as well as the rear panels can be removed to save in excess of over 40lbs.

Stock Speakers - With a weight of over 2 pounds a piece these can also be easily removed.

Rear Hatch Cover - This can simply be removed whenever needed. Weight is close to 6 lbs.

Replace Stock Exhaust - The stock Celica exhaust weighs considerably more than some of the aluminum aftermarket exhausts. We suggest going with the TRD Exhaust.

Wiper Motors - Although they are generally needed under almost all driving conditions they CAN be removed if need be although we do not personally recommend it.

Carpet - Removing the carpet as well as the carpet lining underneath will reduce the cars overall weight by close to 40lbs. Removing excess wiring and bolts and brackets will also net you a reduction of close to 10lbs.


http://www.importmodifications.com/celicaweightred.html

i could be wrong w/ this statement but i heard that for every 1lb you reduce on your rims/tires its the equivelent of reducing 9lbs anywhere else on the car (rotational mass)...so lets just consider the rims

lets say that the first statment is true about the rims weighing bout 22lbs..you go and get yourself some 12lb lightweight rims...thats a drop of 10lbs per rim...so 40 lbs total...now factor in the fact of rotational mass thats 360lbs...aka 27.69 hp freed up...

would this be acurate??

and thats not even factoring in that if you got lightweight rims you probebly also got racing slicks to go along w/ those...

i could be wrong w/ this statement but i heard that for every 1lb you reduce on your rims/tires its the equivelent of reducing 9lbs anywhere else on the car (rotational mass)...so lets just consider the rims

lets say that the first statment is true about the rims weighing bout 22lbs..you go and get yourself some 12lb lightweight rims...thats a drop of 10lbs per rim...so 40 lbs total...now factor in the fact of rotational mass thats 360lbs...aka 27.69 hp freed up...

would this be acurate??




and thats not even factoring in that if you got lightweight rims you probebly also got racing slicks to go along w/ those...

...Dry Ice...that's a good idea...beats merely the hammer and chisel, which takes forever. I feel like I'm breaking out of Alcatraz.

hey Lucky, where did you go to weigh your car?

Has anyone removed junk from behind the dash? That's the last place for me.

Lucky, how much weight do you think a full carbon fiber body would save? To estimate? 200 lbs maybe? And as opposed to an acid dip of the frame? If the Carbon Fiber body only saves 200 lbs then I might need to have a custom chasis made to spec, right?...since that's the only place left to reduce the race weight down to like 1800 lbs.