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Joined: Jan 2003
Posts: 45
BESTONE
Member
BESTONE May 14, 12:53am - #178363 
Member
00 Toyota Celica

Joined: Jan 2003
Posts: 45
Florida
Who understand dynos?

I dont understand the dynos. Cuz The celica stock is supposed to have 180hp, and I see all this dynos of all these guys with a buch of stuff in the Hood of their cars, headers, Intakes, cat-backs and the only way they have more max power than 175 is having a Turbo or the supercharge...why???
Joined: May 2004
Posts: 3
Jared28
New Member
Jared28 May 14, 1:09am - #178364 
New Member
1997 Mitsubishi Eclipse GST

Joined: May 2004
Posts: 3
Malverne, NY
Dyno's are measured to the wheels...180 is the hp before the power goes though the drivetrain. Usually I think its measured like 85%...if you have 180hp overall then you multiply that by 85% and you have 153hp to the wheels. I think my theory is right...someone help out.
Joined: Feb 2004
Posts: 824
GTQuentin
Senior Member
GTQuentin May 14, 1:09am - #178365 

Senior Member
2000 Toyota Celica GT

Joined: Feb 2004
Posts: 824
Northern VA
You lose power through out your car. The horsepower just dosnt automatically go the the wheels. And dynos mesure wheel horsepower. Not crank. To find crank horsepower you have to uselots of math. Hope that helps??
Joined: Jul 2002
Posts: 10,123
VSGTS14
05 WRB
VSGTS14 May 14, 1:11am - #178366 

05 WRB
2005 Subaru WRX STi

Joined: Jul 2002
Posts: 10,123
Milford, NJ
the hp that the car is said to have is how much it generates at the crank...

but when you're putting that hp to the wheels, it's less due to engine, weight, and those characteristics.

GTS is 161 hp to the wheels...that's good since it's 180 stock...

the RSX type S is 200 hp and dynos at 160 something to the wheels

SUBARU TECNICA INTERNATIONAL
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Posts: 2,269
NorwayGT
Specialist
NorwayGT May 14, 1:12am - #178367 

Specialist
2004 Dodge SRT4

Joined: Aug 2003
Posts: 2,269
Seattle, WA
holy shit...i coulda swarn that when i replied there wernt any other replies..ill just delete mine

was....5speed with i/h/e
15.41 @ 89.30mph 2.282 60'

is....04 srt4 stock
13.936 100.15mph 2.177 60'
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Posts: 3,077
slidr
Specialist
slidr May 14, 1:39am - #178368 

Specialist
2000 Toyota Celica

Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
Originally Posted by Jared28
Dyno's are measured to the wheels...180 is the hp before the power goes though the drivetrain. Usually I think its measured like 85%...if you have 180hp overall then you multiply that by 85% and you have 153hp to the wheels. I think my theory is right...someone help out.
Depends on the car, and it depends what type of drivetrain the car has. 4WD cars obviously suffer from more power loss.

Aqua Teen Hunger Force...number one in the hood, G
Joined: Sep 2003
Posts: 2,242
Lucky_317
Specialist
Lucky_317 May 14, 4:07pm - #178369 

Specialist
2000 Toyota Celica

Joined: Sep 2003
Posts: 2,242
Fontana, CA
I dynoed 154 stock frown

but 183 w/ Intake and power fc smile lol

Best 60' 1.959 best 1/4 - 13.7 @ 101mph
Joined: Aug 2003
Posts: 6,372
Speed4TheNeed
Caleb
Speed4TheNeed May 14, 4:11pm - #178370 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
bhp is the # of horses an engine actually produces.

whp (the # a dyno will give you) is the # that actually gets transferred to the pavement. if you're engine ran freely, then you would get a bhp AND a whp of 180. but the fact is that no engine runs freely.

your engine must push air out through the exhaust. this causes backpressure which makes it harder for your engine to run. also, your engine turns many pulleys and your AC, among other things (ever notice your car runs better without the AC on?). because of all this extra friction, your bhp # is reduced to a dyno # that shows your whp.

whp is a MUCH more important # than bhp because of this...it's what you are actually putting down. therefore, a car that retains a better percentage of its bhp is built more efficiently. meaning, a 180 bhp car that dynos at 160 (a typical celica gts) is built better than a 180 bhp car that dynos at 150 whp. thumbsup
Joined: Sep 2003
Posts: 2,242
Lucky_317
Specialist
Lucky_317 May 14, 8:36pm - #178371 

Specialist
2000 Toyota Celica

Joined: Sep 2003
Posts: 2,242
Fontana, CA
Originally Posted by sPeEd4tHeNeEd
bhp is the # of horses an engine actually produces.

whp (the # a dyno will give you) is the # that actually gets transferred to the pavement. if you're engine ran freely, then you would get a bhp AND a whp of 180. but the fact is that no engine runs freely.

your engine must push air out through the exhaust. this causes backpressure which makes it harder for your engine to run. also, your engine turns many pulleys and your AC, among other things (ever notice your car runs better without the AC on?). because of all this extra friction, your bhp # is reduced to a dyno # that shows your whp.

whp is a MUCH more important # than bhp because of this...it's what you are actually putting down. therefore, a car that retains a better percentage of its bhp is built more efficiently. meaning, a 180 bhp car that dynos at 160 (a typical celica gts) is built better than a 180 bhp car that dynos at 150 whp. thumbsup



summary = my car is built poorly. lol ... j/p

great explanation!

Best 60' 1.959 best 1/4 - 13.7 @ 101mph
Joined: Nov 2003
Posts: 2,224
oas
Specialist
oas May 14, 9:08pm - #178372 
Specialist

Joined: Nov 2003
Posts: 2,224
wheel power and car horse power
Joined: Jan 2004
Posts: 874
drkramm
seabass
drkramm May 15, 12:38am - #178373 
2000 black Toyota Celica GTS
seabass
2000 Toyota Celica GTS

Joined: Jan 2004
Posts: 874
pa
wow it took that many times of the same dam response wtf

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
Joined: Sep 2003
Posts: 3,077
slidr
Specialist
slidr May 15, 1:20am - #178374 

Specialist
2000 Toyota Celica

Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
Originally Posted by Lucky_317
I dynoed 154 stock frown

but 183 w/ Intake and power fc smile lol
I knew our engines were underrated at the crank.

Aqua Teen Hunger Force...number one in the hood, G
Joined: Feb 2003
Posts: 1,408
CelicaRacer05
Specialist
CelicaRacer05 May 15, 1:21am - #178375 

Specialist
2000 Toyota Celica GT

Joined: Feb 2003
Posts: 1,408
Englewood, CO
Originally Posted by Jared28
Dyno's are measured to the wheels...180 is the hp before the power goes though the drivetrain. Usually I think its measured like 85%...if you have 180hp overall then you multiply that by 85% and you have 153hp to the wheels. I think my theory is right...someone help out.


actually i beleive that the 180 is what is comming out, the hp that goes into the motor is much greater (as our physics teacher says)

by the way if you want to have some fun... 1 hp is 746 watts, so you can play around and see how many watts a car has instead of hp's (and by the way one hp for those who dont know is 550 ft/lbs)
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