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Joined: Nov 2004
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Haggard
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Haggard

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2000 Toyota Celica

Joined: Nov 2004
Posts: 236
San Antonio Texas
Jan 19, 3:46am - #377889 
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

Caleb
2000 Toyota Celica

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Posts: 6,372
New Orleans, LA
Jan 19, 5:51am - #377890 
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

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Jan 19, 8:30am - #377891 
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
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TRDOTC

Senior Member
2003 Toyota Celica GT

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Posts: 722
Pocasset, MA
Jan 19, 8:49am - #377892 
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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Posts: 874
drkramm
seabass
drkramm
2000 black Toyota Celica GTS
seabass
2000 Toyota Celica GTS

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Posts: 874
pa
Jan 19, 8:52am - #377893 


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
Jennie: ...derek..what did you do
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Posts: 468
GTS_Rosh
Senior Member
GTS_Rosh

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2004 Toyota Celica

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Posts: 468
Vancouver, BC, Canada
Jan 19, 12:23pm - #377894 


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?

Joined: Jan 2003
Posts: 2,139
ct
C'mon & hit me!
ct

C'mon & hit me!
2000 Toyota Celica GTS

Joined: Jan 2003
Posts: 2,139
Woodland Hills, CA
Jan 19, 12:32pm - #377895 
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.
Joined: Jun 2004
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QTRMLR_1
Specialist
QTRMLR_1

Specialist
2002 Toyota Celica

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Posts: 1,376
Los Angeles, CA
Jan 19, 12:41pm - #377896 
the stock Hood does not weigh 50 lbs lol.


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Posts: 60
gtspaul2zzge
Member
gtspaul2zzge
2001 spectra blue Toyota Celica
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2001 Toyota Celica

Joined: Sep 2004
Posts: 60
california
Jan 19, 12:49pm - #377897 
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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Posts: 468
GTS_Rosh
Senior Member
GTS_Rosh

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2004 Toyota Celica

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Posts: 468
Vancouver, BC, Canada
Jan 19, 1:09pm - #377898 
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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Posts: 3,748
hombredelassrtas
CF Connoisseur
hombredelassrtas

CF Connoisseur
2004 Toyota Celica

Joined: Jun 2004
Posts: 3,748
Gainesville, FL
Jan 19, 3:21pm - #377899 
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

Joined: Jan 2004
Posts: 1,612
eric_h
2low2slow
eric_h

2low2slow
2002 Toyota Celica GT

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Posts: 1,612
St.George, UT
Jan 19, 3:28pm - #377900 
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

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2002 Toyota Celica

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Posts: 1,376
Los Angeles, CA
Jan 19, 3:59pm - #377901 
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.


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Speed4TheNeed
Caleb
Speed4TheNeed

Caleb
2000 Toyota Celica

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New Orleans, LA
Jan 20, 6:57am - #377902 
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

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2004 Toyota Celica

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Posts: 468
Vancouver, BC, Canada
Jan 20, 11:07am - #377903 
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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Posts: 6
toycelica74
New Member
toycelica74
2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

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Tulsa, Oklahoma
Jan 20, 11:21am - #377904 
I'll weigh my old Hood when I get home. thumbsup

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QTRMLR_1
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QTRMLR_1

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2002 Toyota Celica

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Los Angeles, CA
Jan 20, 12:10pm - #377905 
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.


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celicatuner
Member
celicatuner
2002 silver Toyota Celica
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2002 Toyota Celica

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Posts: 319
amherst, ma
Jan 20, 1:07pm - #377906 
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
2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

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Tulsa, Oklahoma
Jan 20, 1:27pm - #377907 
Ok, my stock Hood weighed in at 26lbs, paint and all. spineyes

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GTS_Rosh
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GTS_Rosh

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2004 Toyota Celica

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Vancouver, BC, Canada
Jan 20, 2:05pm - #377908 
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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Posts: 1,337
celicadragon
Specialist
celicadragon

Specialist
2002 Toyota Celica

Joined: Jun 2004
Posts: 1,337
Pittsburgh, PA
Jan 20, 2:14pm - #377909 
less weight in the back is better since the car is fwd


respect the gt-s
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Posts: 2,242
Lucky_317
Specialist
Lucky_317

Specialist
2000 Toyota Celica

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Posts: 2,242
Fontana, CA
Jan 20, 3:01pm - #377910 
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
2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

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Posts: 6
Tulsa, Oklahoma
Jan 20, 3:39pm - #377911 
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.

Joined: Apr 2004
Posts: 427
speed_celica
Senior Member
speed_celica

Senior Member
2000 Toyota Celica

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Posts: 427
Calgary, AB, Canada
Feb 14, 10:32am - #377912 
Does anyone know how much the stock battery weights?

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Lucky_317
Specialist
Lucky_317

Specialist
2000 Toyota Celica

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Posts: 2,242
Fontana, CA
Feb 14, 11:46am - #377913 
about 31 lbs


Best 60' 1.959 best 1/4 - 13.7 @ 101mph
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Posts: 1,233
EuRoBoYGT
black & blue 4 you
EuRoBoYGT

black & blue 4 you
2000 Toyota Celica GT

Joined: Oct 2002
Posts: 1,233
El Paso, TX
Feb 14, 10:05pm - #377914 
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

Senior Member
2000 Toyota Celica

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Posts: 427
Calgary, AB, Canada
Feb 15, 4:00pm - #377915 
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

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Feb 16, 5:08pm - #377916 
^^ 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

Joined: Mar 2004
Posts: 132
Parabol
Member
Parabol
2004 red Toyota Celica
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2004 Toyota Celica

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Posts: 132
FL
Feb 16, 5:34pm - #377917 
the best weight reduction is to do some sit ups thumbsup

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Posts: 528
renfield90
Senior Member
renfield90

Senior Member
2001 Toyota Celica GT

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Posts: 528
Tempe, AZ
Feb 16, 9:14pm - #377918 
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.

Joined: Aug 2003
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Speed4TheNeed
Caleb
Speed4TheNeed

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Feb 17, 6:33am - #377919 
^^ 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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Posts: 427
speed_celica
Senior Member
speed_celica

Senior Member
2000 Toyota Celica

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Posts: 427
Calgary, AB, Canada
Feb 17, 10:37am - #377920 
Really? I don't find my celica oversteer at all!

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renfield90
Senior Member
renfield90

Senior Member
2001 Toyota Celica GT

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Posts: 528
Tempe, AZ
Feb 17, 2:28pm - #377921 
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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