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Old 08-21-2013, 11:50 PM   #10053
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I prefer swifers.. they spray the cleaner like a nitrous boost!
Lmfao!
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Old 08-22-2013, 05:48 AM   #10054
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Today's question?

HP? Why it said v6 has 312hp and the dyno show less? Why when people explain the gains on the performance mods they say HP on the wheels? How you add the HP gains after each performance mods? Example: I have 312hp, I install an intake that gives 30hp, I suppose to have now 342hp... common experts!
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Old 08-22-2013, 07:50 AM   #10055
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Originally Posted by Monchy36 View Post
HP? Why it said v6 has 312hp and the dyno show less? Why when people explain the gains on the performance mods they say HP on the wheels? How you add the HP gains after each performance mods? Example: I have 312hp, I install an intake that gives 30hp, I suppose to have now 342hp... common experts!
all car manufacturers measure HP from the crank. Meaning, engine output. But when you put that engine into a car, it has to take that power, and go through the drivetrain and through the wheels. This causes power loss. Depending on the car, depends on how much HP loss. HP to the wheels will always be lower than engine HP. So unless you hook your car up to an engine dyno, and not a regular dyno with the big wheels, you will always get wheel horsepower.

When intake manufacturers make claims of HP gain, they normally take wheel horsepower, or they lie. lol The way energy and mechanics work on a car, you can't just add HP on top of each other. For instance, you can't just say an intake gave you 30hp, headers gave you 40hp, so you can add 70hp. doesn't work that way.
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Old 08-22-2013, 07:53 AM   #10056
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here is a picture of an engine dyno, that car manufacturers use to test and measure their engine's horsepower.



car dyno


by the time the energy and hp get to the rear wheels, it loses some power(usually 15-20% hp loss). the power to the wheels is what's important when it comes to racing/bragging.
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Old 08-22-2013, 08:08 AM   #10057
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Jason pretty much explained it all but I have one question for monchy. Who in the world claims a 30 HP gain with just an intake? The best of intakes for our cars claim half that to the wheels
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Old 08-22-2013, 08:28 AM   #10058
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Jason pretty much explained it all but I have one question for monchy. Who in the world claims a 30 HP gain with just an intake? The best of intakes for our cars claim half that to the wheels
that was just an example... so how is the right way to know the real HP gain when you add different types of performance mods?
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Old 08-22-2013, 08:36 AM   #10059
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that was just an example... so how is the right way to know the real HP gain when you add different types of performance mods?
go to a 1/4 mile track. lol

reason I say that, is because all dyno's are different. even the same dyno on a different day will give you different results. best thing to do is get a baseline dyno, put on your mod, and dyno again the same day, or close to the same weather conditions as the baseline dyno.
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Old 08-22-2013, 08:44 AM   #10060
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that was just an example... so how is the right way to know the real HP gain when you add different types of performance mods?
To tell you the truth there really isn't a good way to do it unlike you do it like Jason says install the mod the same day and do another dyno run right after the install.

But to me dynos have always been an estimate some are stingy with their numbers others are very giving so the true test of power is out in the real world on the track



Oh and to add to add with how different dyno number can be there is a member in my group who is pushing about 700 HP to the fly wheel but with his stall converter his dyno numbers are reading in the 570 range. Same goes with rear end ratios the lower ratios (higher numerical) tend to read less HP on a dyno when in reality you are faster than what's given.
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Old 08-22-2013, 09:46 AM   #10061
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So 2 car can be same model and same mods, and have different HP? By the way, Who came up with the idea of HP? Why can be Zebra power or Cheetah Power? Lol!
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Old 08-22-2013, 09:55 AM   #10062
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So 2 car can be same model and same mods, and have different HP? By the way, Who came up with the idea of HP? Why can be Zebra power or Cheetah Power? Lol!
Yup. Every car can be completely different which can get annoying. And my guess for horse power is Becusse before the engine carriages were pulled by horses so a motor makes the equivalent of what 312 horses can do. But that is just a guess I never really asked and just thought that.
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Old 08-22-2013, 10:00 AM   #10063
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Yup. Every car can be completely different which can get annoying. And my guess for horse power is Becusse before the engine carriages were pulled by horses so a motor makes the equivalent of what 312 horses can do. But that is just a guess I never really asked and just thought that.
Sounds right...
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Old 08-22-2013, 10:10 AM   #10064
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Also, horsepower is a reference to the breed of horse Clydesdale. 1 horsepower is roughly equivalent to 1 Clydesdale.
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Old 08-22-2013, 10:15 AM   #10065
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A dyno measures torque and converts it to horsepower through a mathmatical formula.

Torque x RPM ÷ 5252 = horsepower
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Old 08-22-2013, 10:20 AM   #10066
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"Horsepower" was termed by James Watt. He used horses for coal mining and needed to put a number on the animals output. He figured out a pony could be used to move the equivalent of 22k pounds of coal an hour and a horse could move 50% more and 33k lbs an hour.

The term horsepower is subjective. It really means nothing just like every other scale of measurement that was ever invented.
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