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Joined: Nov 2004
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Haggard
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Haggard Jan 19, 10:46am - #377889 

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2000 Toyota Celica

Joined: Nov 2004
Posts: 236
San Antonio Texas
hp loss due to weight

so, im looking around online for the different cars I see around to see what Im dealing with as far as competition, and Im trying to get a better idea of how much horsepower is lost due to weight. Ive heard that for every 10 pounds you (virtually) lose 1 hp about is that true or is there really no way to truly find out? I mean, I know you dont lose hp, but you have more weight to push with that hp. So, if anyone has a better ratio or maybe a way to calculate, let me hear it! smile
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Speed4TheNeed
Caleb
Speed4TheNeed Jan 19, 12:51pm - #377890 

Caleb
2000 Toyota Celica

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Posts: 6,372
New Orleans, LA
for the celica it's more like 15 pounds per horse..for a gts anyway. most gts dynos go around the 160 whp mark (it's better to use whp than bhp)...and the celica (both gt & gts) weigh about 2,500 pounds. 2,500 divided by 160 = 15.6 pounds per horse that the engine has to push.

so if you lost 15.6 pounds, you would effectively 'gain' a whp unit.
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Speed4TheNeed
Caleb
Speed4TheNeed Jan 19, 3:30pm - #377891 

Caleb
2000 Toyota Celica

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New Orleans, LA
oh yea, you can always add your weight into the equation. im 170 so my car ways about 2670lbs. it doesnt really matter though because 2,500 is just an approximation anyway...it varies up to 100 pounds.
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TRDOTC
Senior Member
TRDOTC Jan 19, 3:49pm - #377892 

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2003 Toyota Celica GT

Joined: Sep 2004
Posts: 722
Pocasset, MA
it depends the weight...gt and gts have different weights and it depends if you have a manual or auto..here:

GT/GT Action Package GTS/GTS ActionPackage

Curb weight(manual/automatic)(lbs.) 2,425/2,460 2,500/2,580

This is from the Toyota website! Left numbers are for gt and the 2 right numbers are for GTS
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drkramm
seabass
drkramm Jan 19, 3:52pm - #377893 
2000 black Toyota Celica GTS
seabass
2000 Toyota Celica GTS

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pa

hey thats a 20 minute phone call
"if i have seen farther it is by standing on the shoulders of giants"
derek: do you know that non dairy cream is flamable
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GTS_Rosh
Senior Member
GTS_Rosh Jan 19, 7:23pm - #377894 

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2004 Toyota Celica

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Posts: 468
Vancouver, BC, Canada


Whoa, terrific link! The heaviest thing is the stock Hood, I didn't know it weighs 50lbs! How much does a carbon fiber Hood weight?
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ct
C'mon & hit me!
ct Jan 19, 7:32pm - #377895 

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2000 Toyota Celica GTS

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Posts: 2,139
Woodland Hills, CA
Originally Posted by Speed4TheNeed
oh yea, you can always add your weight into the equation. im 170 so my car ways about 2670lbs. it doesnt really matter though because 2,500 is just an approximation anyway...it varies up to 100 pounds.


you have to account for the weight of 14.5 gallons of gasoline and other fluids in your car

Originally posted by SKOOF:
yoru such a clown, i wish you lived in nyc, i would love to just give you the beating that youve probably never gotten in your life.
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QTRMLR_1
Specialist
QTRMLR_1 Jan 19, 7:41pm - #377896 

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2002 Toyota Celica

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Los Angeles, CA
the stock Hood does not weigh 50 lbs lol.

I get my kicks on EC.
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gtspaul2zzge
Member
gtspaul2zzge Jan 19, 7:49pm - #377897 
2001 spectra blue Toyota Celica
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2001 Toyota Celica

Joined: Sep 2004
Posts: 60
california
NICE LINK! weight reduction is the easiest, cheapest way for a slightly faster car. Better for brakes too. I've stripped a lot of my interior, the one problem is most weight reductions are from the rear area of the car. Which promotes understeer. Rotational mass is the best weight reducer (I.E. lightweight rims, flywheel, accessory pullies). thumbsup
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GTS_Rosh
Senior Member
GTS_Rosh Jan 19, 8:09pm - #377898 

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2004 Toyota Celica

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Posts: 468
Vancouver, BC, Canada
Originally Posted by QTRMLR_1
the stock hood does not weigh 50 lbs lol.


Really? So that info is incorrect..? How much it weighs, anybody know?
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hombredelassrtas
CF Connoisseur
hombredelassrtas Jan 19, 10:21pm - #377899 

CF Connoisseur
2004 Toyota Celica

Joined: Jun 2004
Posts: 3,748
Gainesville, FL
i have read other forums aobut this. you can search for more info. prettymuch to get a big difference take every pannel off of yoru car. and strip the interrior down to nothing at all wink goodluck though. post pics when you start your weighterloss program smile

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eric_h
2low2slow
eric_h Jan 19, 10:28pm - #377900 

2low2slow
2002 Toyota Celica GT

Joined: Jan 2004
Posts: 1,612
St.George, UT
Originally Posted by ct
Originally Posted by Speed4TheNeed
oh yea, you can always add your weight into the equation. im 170 so my car ways about 2670lbs. it doesnt really matter though because 2,500 is just an approximation anyway...it varies up to 100 pounds.


you have to account for the weight of 14.5 gallons of gasoline and other fluids in your car


no the curb weight is the weight of a car with all fluids full and full tank of gas, dry weight is car bone dry.

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QTRMLR_1
Specialist
QTRMLR_1 Jan 19, 10:59pm - #377901 

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2002 Toyota Celica

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Los Angeles, CA
Originally Posted by GTS_Rosh
Originally Posted by QTRMLR_1
the stock hood does not weigh 50 lbs lol.


Really? So that info is incorrect..? How much it weighs, anybody know?


I made an estimate awhile back much lower than 50 lbs, think I said 20 and Lucky_317 said it was a bit lower than that. That was in another weight reduction thread. I trust him, but it's definitely not 50 and for those who work out with weights you'd know.

I get my kicks on EC.
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Speed4TheNeed
Caleb
Speed4TheNeed Jan 20, 1:57pm - #377902 

Caleb
2000 Toyota Celica

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New Orleans, LA
20 pounds for a stock Hood? i would have thought it was more (although less than 50). we need someone to actually weigh the thing...i hate trying to make appoximations off of guesses. the innacuracies just get even more blown out
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GTS_Rosh
Senior Member
GTS_Rosh Jan 20, 6:07pm - #377903 

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2004 Toyota Celica

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Vancouver, BC, Canada
If someone got a carbon fiber Hood on there car and perhaps there stock Hood laying around in the garage, please go weigh it for us! Its good to get exact figures, like now I know for sure that stock GTS rims weigh about 19lbs, thanks to the other thread.
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toycelica74
New Member
toycelica74 Jan 20, 6:21pm - #377904 
2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

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Tulsa, Oklahoma
I'll weigh my old Hood when I get home. thumbsup
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QTRMLR_1
Specialist
QTRMLR_1 Jan 20, 7:10pm - #377905 

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2002 Toyota Celica

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Los Angeles, CA
scratch 20, I'll go the other direction from Lucky and guess perhaps the Hood may be closer to 30 lbs...can't wait to hear the results. I'd weigh mine but it's 350 miles away right now.

I get my kicks on EC.
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celicatuner
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celicatuner Jan 20, 8:07pm - #377906 
2002 silver Toyota Celica
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2002 Toyota Celica

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amherst, ma
does anyone have a batterie in their trunk? that would help with relocating the weight from the front to the back alittle. also lighter weight engine parts dash peices and Hood help drop the weight in the front.
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toycelica74
New Member
toycelica74 Jan 20, 8:27pm - #377907 
2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

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Tulsa, Oklahoma
Ok, my stock Hood weighed in at 26lbs, paint and all. spineyes
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GTS_Rosh
Senior Member
GTS_Rosh Jan 20, 9:05pm - #377908 

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2004 Toyota Celica

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Vancouver, BC, Canada
Originally Posted by toycelica74
Ok, my stock Hood weighed in at 26lbs, paint and all. spineyes


Whoa cool, thanks man! That's with the stock Hood scoop on it still right?
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celicadragon
Specialist
celicadragon Jan 20, 9:14pm - #377909 

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2002 Toyota Celica

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Pittsburgh, PA
less weight in the back is better since the car is fwd

respect the gt-s
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Lucky_317
Specialist
Lucky_317 Jan 20, 10:01pm - #377910 

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2000 Toyota Celica

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Fontana, CA
a lot of the weights listed on that link are bogus.

the stock Hood is around 20 lbs NOT 50 for one huge example.

also the seats weigh about 34 lbs not 40+.

they have the right ideas but don't look at the actual weight.

also they do not account for whp only factory rated power.

my car personally is at 12:1 power to weight.

also rotating weight loss such as lighter/smaller rims play a huge role as well.

Best 60' 1.959 best 1/4 - 13.7 @ 101mph
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toycelica74
New Member
toycelica74 Jan 20, 10:39pm - #377911 
2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

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Tulsa, Oklahoma
Originally Posted by GTS_Rosh
Originally Posted by toycelica74
Ok, my stock Hood weighed in at 26lbs, paint and all. spineyes


Whoa cool, thanks man! That's with the stock hood scoop on it still right?


Yeah, the stock Hood scoop was on.
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speed_celica
Senior Member
speed_celica Feb 14, 5:32pm - #377912 

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2000 Toyota Celica

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Posts: 427
Calgary, AB, Canada
Does anyone know how much the stock battery weights?
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Lucky_317
Specialist
Lucky_317 Feb 14, 6:46pm - #377913 

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2000 Toyota Celica

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Fontana, CA
about 31 lbs

Best 60' 1.959 best 1/4 - 13.7 @ 101mph
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EuRoBoYGT
black & blue 4 you
EuRoBoYGT Feb 15, 5:05am - #377914 

black & blue 4 you
2000 Toyota Celica GT

Joined: Oct 2002
Posts: 1,233
El Paso, TX
im thinking of putting my battery in the back but first i need to get a mat that will cover up the back all the way to the back of the front seats. once i get that im going to relocate my battery to the rear

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speed_celica
Senior Member
speed_celica Feb 15, 11:00pm - #377915 

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2000 Toyota Celica

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Posts: 427
Calgary, AB, Canada
I don't think moving the battery to the rear will make a big difference, and since our cars are FF, it's better to have more with towards the front of the car for traction.
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Speed4TheNeed
Caleb
Speed4TheNeed Feb 17, 12:08am - #377916 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
^^ leave the battery in it's stock location if you want to ACCELERATE better (such as in a drag)

it's good from a HANDLING perspective (such as with auto-x) to have as close to 50/50 weight ratio as possible...so relocating the battery to the rear helps out a little because the celica has something like 65/35 weight distribution. putting some weigh in the rear will help you car handle better
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Posts: 132
Parabol
Member
Parabol Feb 17, 12:34am - #377917 
2004 red Toyota Celica
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2004 Toyota Celica

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Posts: 132
FL
the best weight reduction is to do some sit ups thumbsup
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renfield90
Senior Member
renfield90 Feb 17, 4:14am - #377918 

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2001 Toyota Celica GT

Joined: May 2004
Posts: 528
Tempe, AZ
Originally Posted by Speed4TheNeed
^^ leave the battery in it's stock location if you want to ACCELERATE better (such as in a drag)

it's good from a HANDLING perspective (such as with auto-x) to have as close to 50/50 weight ratio as possible...so relocating the battery to the rear helps out a little because the celica has something like 65/35 weight distribution. putting some weigh in the rear will help you car handle better


50/50 weight distribution is good for a RWD car, but in a FWD car more weight shift to the rear means less weight on the front. Less weight on the front means less friction the tires can generate, leading to more understeer.

It's true that 50/50 on a FWD would make it feel more balanced, up until you push it to the limit, in which case you'd understeer.
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Speed4TheNeed
Caleb
Speed4TheNeed Feb 17, 1:33pm - #377919 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
^^ haha guess we can't have it all. the celica already oversteers like a mother rofl rofl

anybody familiar with swinging the celica's rear around? wave
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speed_celica
Senior Member
speed_celica Feb 17, 5:37pm - #377920 

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2000 Toyota Celica

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Calgary, AB, Canada
Really? I don't find my celica oversteer at all!
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renfield90
Senior Member
renfield90 Feb 17, 9:28pm - #377921 

Senior Member
2001 Toyota Celica GT

Joined: May 2004
Posts: 528
Tempe, AZ
Originally Posted by Speed4TheNeed
^^ haha guess we can't have it all. the celica already oversteers like a mother rofl rofl

anybody familiar with swinging the celica's rear around? wave


With Hotchkis Competition Sway Bars and a few other mods (rear strut bar), sure.

With stock suspension, decent tires, and dry pavement...no.
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