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Who understand dynos? #178363 May 13, 5:53pm May 13, 5:53pm
Joined: Jan 2003
Posts: 45
Florida
B
BESTONE OP
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00 Toyota Celica
BESTONE OP
B
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???

Re: Who understand dynos? [Re: BESTONE] #178364 May 13, 6:09pm May 13, 6:09pm
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Malverne, NY
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Jared28
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1997 Mitsubishi Eclipse GST
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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.

Re: Who understand dynos? [Re: BESTONE] #178365 May 13, 6:09pm May 13, 6:09pm
Joined: Feb 2004
Posts: 824
Northern VA
GTQuentin
Senior Member
2000 Toyota Celica GT
GTQuentin
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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??

Re: Who understand dynos? [Re: Jared28] #178366 May 13, 6:11pm May 13, 6:11pm
Joined: Jul 2002
Posts: 10,123
Milford, NJ
VSGTS14
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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


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Re: Who understand dynos? [Re: BESTONE] #178367 May 13, 6:12pm May 13, 6:12pm
Joined: Aug 2003
Posts: 2,269
Seattle, WA
NorwayGT
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2004 Dodge SRT4
NorwayGT
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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'
Re: Who understand dynos? [Re: Jared28] #178368 May 13, 6:39pm May 13, 6:39pm
Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
slidr
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slidr
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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
Re: Who understand dynos? [Re: slidr] #178369 May 14, 9:07am May 14, 9:07am
Joined: Sep 2003
Posts: 2,242
Fontana, CA
Lucky_317
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Lucky_317
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2000 Toyota Celica

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I dynoed 154 stock frown

but 183 w/ Intake and power fc smile lol


Best 60' 1.959 best 1/4 - 13.7 @ 101mph
Re: Who understand dynos? [Re: Lucky_317] #178370 May 14, 9:11am May 14, 9:11am
Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Speed4TheNeed
Caleb
2000 Toyota Celica
Speed4TheNeed
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2000 Toyota Celica

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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

Re: Who understand dynos? [Re: Speed4TheNeed] #178371 May 14, 1:36pm May 14, 1:36pm
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Posts: 2,242
Fontana, CA
Lucky_317
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Lucky_317
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2000 Toyota Celica

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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
Re: Who understand dynos? [Re: Lucky_317] #178372 May 14, 2:08pm May 14, 2:08pm
Joined: Nov 2003
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O
oas
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oas
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wheel power and car horse power

Re: Who understand dynos? [Re: oas] #178373 May 14, 5:38pm May 14, 5:38pm
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drkramm
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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
Re: Who understand dynos? [Re: Lucky_317] #178374 May 14, 6:20pm May 14, 6:20pm
Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
slidr
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slidr
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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
Re: Who understand dynos? [Re: Jared28] #178375 May 14, 6:21pm May 14, 6:21pm
Joined: Feb 2003
Posts: 1,408
Englewood, CO
CelicaRacer05
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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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