Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Nissan 370Z General Discussions (http://www.the370z.com/nissan-370z-general-discussions/)
-   -   Whp vs. Engine hp? (http://www.the370z.com/nissan-370z-general-discussions/36254-whp-vs-engine-hp.html)

KaienZ34 05-11-2011 03:06 PM
E=Mc2...:icon14: wait wait math is hard. Just get in, turn on, push the pedal on the right and go fast, done.

b1adesofcha0s 05-11-2011 03:25 PM
Looks like the :drama: is finished and we've come up with a working equation :tup:

Pelican170 05-11-2011 03:26 PM
Quote:
Originally Posted by Dizon248 (Post 1104052)
And Pelican, sorry about earlier, I just got a little heated.
Aaahh gotcha with ur above post... And no problem man. We all get heated up once in a while!

onzedge 05-11-2011 03:27 PM
I am definitely not a math whiz, but i wonder if we are going with an assumption that the bhp to whp loss is constant. I do not know, just asking.

SeattleLion 05-11-2011 03:27 PM
Aside from the dyno itself, isn't whp affected by the tires? The tires have to transmit the energy to the dyno, so if the tires have a super high coeficient of friction, then the dyno will read higher whp than from a tire that is less slippery. Some of the bhp is lost as heat as the tires flex and slip.

Cmike2780 05-11-2011 03:39 PM
Quote:
Originally Posted by SeattleLion (Post 1104142)
Aside from the dyno itself, isn't whp affected by the tires? The tires have to transmit the energy to the dyno, so if the tires have a super high coeficient of friction, then the dyno will read higher whp than from a tire that is less slippery. Some of the bhp is lost as heat as the tires flex and slip.
That's exacly why you have to have vehicle specific baseline readings. There are too many variables to do an dead-on accurate gains between two cars. The equation I posted are just approximations based on available data. We don't know for sure, for example, if the 350bhp is an accurate baseline @ the crank. Basically, we need at least three known values specific to the vehicle in question. For arguement sake, those values give you a rough idea.
....my brain hurts know.
Also, I think I just added to the stereotype about Asians being good at math.:p

Dizon248 05-11-2011 03:44 PM
Quote:
Originally Posted by onzedge (Post 1104141)
I am definitely not a math whiz, but i wonder if we are going with an assumption that the bhp to whp loss is constant. I do not know, just asking.
I figure it is constant if the drivetrain is constant. The % lost between different cars/transmissions will be different.

EDIT: and as the above posters mentioned, tires too. Basically any mechanical piece that helps transfer the power from the engine down to the road WILL affect the final hp given on the wheels. You change any piece of that in between the engine and the road, and you will have different % loss.

Dizon248 05-11-2011 03:47 PM
Quote:
Originally Posted by Cmike2780 (Post 1104167)
That's exacly why you have to have vehicle specific baseline readings. There are too many variables to do an dead-on accurate gains between two cars. The equation I posted are just approximations based on available data. We don't know for sure, for example, if the 350bhp is an accurate baseline @ the crank. Basically, we need at least three known values specific to the vehicle in question. For arguement sake, those values give you a rough idea.

....my brain hurts know.

Also, did I think I just added to the stereotype about Asians being good at math.:p
Haha, I'm Asian too. Funny eh?

b1adesofcha0s 05-11-2011 04:05 PM
Quote:
Originally Posted by Dizon248 (Post 1104183)
Haha, I'm Asian too. Funny eh?
+1 for the Asian crew, but I'm south Asian. Got here late to the math party :roflpuke2:

phelan 05-11-2011 06:39 PM
i heard there was math in here. need another asian? :rofl2:

b1adesofcha0s 05-11-2011 07:04 PM
Quote:
Originally Posted by phelan (Post 1104602)
i heard there was math in here. need another asian? :rofl2:
Come join the party! :rock:

dixon cider 05-11-2011 07:20 PM
Quote:
Originally Posted by phelan (Post 1104602)
i heard there was math in here. need another asian? :rofl2:
:icon18:

Red__Zed 05-11-2011 07:24 PM
I'm not Asian, but I'm pretty good with numbers.

b1adesofcha0s 05-11-2011 07:32 PM
Quote:
Originally Posted by Red__Zed (Post 1104718)
I'm not Asian, but I'm pretty good with numbers.
You can be an honorary asian <3

christian370z 05-11-2011 07:33 PM
Quote:
Originally Posted by phelan (Post 1104602)
i heard there was math in here. need another asian? :rofl2:
Hahaha, that's even better now that I am in China haha.


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