Engine HP vs. Wheel HP
Instructor
Joined: Nov 2014
Posts: 109
Likes: 5
From: Chula Vista, CA
In reality, it's pretty much all guesstimates that people use for bragging rights. Every dyno is different and every day is different. Arguing that your car make 550whp and my car "only" made 530whp and yours should be faster... is pretty much pointless. If I metered my car on the dyno your car was on, in the same conditions then I might make 560whp. You just don't know. Unless the cars were metered on the same dyno the same day literally back to back then there is no real way to say which makes more power.
Drifting
Joined: Sep 2009
Posts: 1,305
Likes: 80
From: Hollister CA
While adding HP does increase the drive train loss, its not linear. For example, doubling your HP does not magically double the drive-train losses. Of course, how would you know without an engine dyno how much HP you actually added?
Last edited by bobeast; Aug 10, 2016 at 08:12 PM.
Pro
Joined: Jan 2015
Posts: 503
Likes: 48
honestly i could make an argument that at some higher hp you may be increasing loss depending on how well the drive train can dissipate the added heat. you will reach a threshold where the drive train cant shed the heat from the added power at which point you would lose more % of power.
for those that arent correlating why added power = more heat think of this. take an angle grinder and grind on a block of steel the steel gets hot. now keep grinding but push down with all of your strength onto the grinder, it gets hotter faster right?. you havent changed the coefficients or materials what you've changed is the force at which the grinding wheel is in contact with the steel. the same thing happens when you add more HP you are increasing the force that the gears must interact with one another and you add heat.
Last edited by Vettemuscle1; Aug 11, 2016 at 09:27 AM.
Safety Car
Joined: Jan 2011
Posts: 4,959
Likes: 526
Pro
Joined: Jan 2015
Posts: 503
Likes: 48
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