How did I dyno this high? (not that I am complaining)

98intrigue

Their dyno reads high. It's just a number anyways. Trap speed proves real horsepower.

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6MT

That is the funniest thing I've read on here in a long time!!

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Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D

esfourteen

what exactly is funny about that factual statement regarding trap speeds and power?

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98intrigue

Yeah, I'm confused.

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6MT

Well, do you think that if I were to travel down a very long hill and reach a very high top speed; that I would deduce that my car has more "power" than someone who runs a short run on a measuring device? Like a dyno? Trap speeds are measurements like dyno runs. But trap speeds can be very deceptive.... as the example above proves.

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Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D

98intrigue

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esfourteen

do you know of any 1/4 tracks that run down a hill? calculating hp by using the trap speed of a 1/4 mile run and your vehicles weight is very effective.

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ChrisSlicks

PM has a reputation for having inflated dyno numbers, Mustang dyno's typically read lower than Dynojet - but in their case it is higher

But anyway like you said it is the relative difference that matters and that the car feels better after the tune. Real world driving is the real test.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

wstar

Really we get what we deserve as a community (car modders in general).

Most people just want to see high numbers on the dyno. It's what ultimately pays and makes a lot of people come back. They get work done at the same shop they dyno at, and they want to see a big number that compares well to other internet dyno numbers. So the numbers are constantly inflating at lots of shops due to tuning and tweaking of the dyno's parameters and little games of how you set up the run. In many ways this is like the conundrum of women's dress sizes. None of them make sense, and there's no direct comparison between any two brands, or even the same brand in different years and seasons.

Really, it wouldn't be that hard for most dynos to read the same. The parameters (mostly, weight-related and weather-related) can be accurately measured and compensated for. In a world where we can define time and weight to more accurate decimal places than anyone knows what to do with, accurately compensated and comparable dyno numbers across the US is a totally realistic goal, if only the market really wanted that.

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gaveup

Trap speed.

As in, your trap speed at the end of the quarter mile shows your true horsepower better than an inflated/improperly configured dyno.
So yes, if I trapped 107mph, and you trapped say, 103mph we can deduce that my car makes more power.
It's not a hard concept, I just think you misread it..

Dyno numbers usually mean nothing unless you have a standard to compare to. It's a tuning tool, not a bragging tool.

To the OP: if other Z's make around that power on that dyno, I think you have nothing to worry about and should be happy

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2010 Magnetic Black Metallic 370Z 6M
stillen gen 3 CAI - topspeed test pipes - invidia gemini CBE - UpRev tune
301whp (HP Logic Mustang Dyno)