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Old 06-11-2004, 04:02 PM   #1
STI_Jaguar
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Join Date: Feb 2004
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Default What is Dyno?

Why do cars need to be dynoed? Is this to determine the horsepower output of the car?

Now is it practical to have a stock car dynoed or is this a waste of time?

Do people bring in stock cars to have dynoed and why?

When do you have your car do this?
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Old 06-11-2004, 04:06 PM   #2
RexyGirl
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I used to live in NJ and they used to put cars on the dyno to check emmissions...nowadays, they use it to test all kinds of things, horsepower, etc..


But DON"T do this with a Subaru unless it is a all wheel dyno!!!!!
two wheel dynos will damage the transmission
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Old 06-11-2004, 04:12 PM   #3
ChuckDee
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Default Re: What is Dyno?

Quote:
Originally posted by STI_Jaguar
Why do cars need to be dynoed? Is this to determine the horsepower output of the car?

Now is it practical to have a stock car dynoed or is this a waste of time?

Do people bring in stock cars to have dynoed and why?

When do you have your car do this?
Most people get their stock cars dynoed to establish a baseline before the Modding of the car starts.

HTH,
-Dee
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Old 06-11-2004, 06:13 PM   #4
Zola
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For people who have aftermarket engine management with which to tune their car, a dyno is a terrific tool.

In order to tune the car throughout the RPM range you have to do pulls from the bottom to the top of a gear (usually 4th). Considering that the top of 4th gear is well in excess of 100mph (on a WRX that is), you can see why it isn't exactly recommended to do such tuning on public roads.

Some dynos can quickly hold the car at a given speed and/or load, which helps the tuning process quite a bit.
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Old 06-11-2004, 09:12 PM   #5
ErikAnderson
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Quote:
Originally posted by rexygirl

two wheel dynos will damage the transmission
you just gave me one hell of a mental image. yes the transmission would be damaged... among other things

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Old 06-11-2004, 10:33 PM   #6
Erika_4404
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:-.) %-~ 8:-) :#)

:-#
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Old 06-12-2004, 12:04 AM   #7
1illusion
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Default Re: What is Dyno?

Quote:
Originally posted by STI_Jaguar
Why do cars need to be dynoed? Is this to determine the horsepower output of the car?

Now is it practical to have a stock car dynoed or is this a waste of time?

Do people bring in stock cars to have dynoed and why?

When do you have your car do this?
Why? Many many reasons people want to dyno, but not many needed reasons. Yes it tells the power to the wheels of the car which will be the power from the motor minus parasitic loss though the driveline(which on AWD has horrific loss).

If you plan on modding your car, it's nice to have a baseline of what you started with. As there have been plenty of other baseline dyno's presented I personally don't feel the need for one.

Same reason above. With one addition. In California currently all 2wd vehicles are dyno'd during an emissions test(smog) putting a load on the motor shows it's true emissions under a load, as opposed to sticking a probe up the pipe and revving the motor while the gearbox is in neutral. Currently there are no AWD dynos at smog stations and it would cost a cubic ass-tonne(new weight system lol) of money to implement, so California lets AWD vehicles use the rev in neutral method.

With one of my last cars(a built turbo prelude) I dyno'd any time I changed something or even with something felt wrong, so I could play with the EMS(engine management system) and dial out any kinks. I plan on doing the same after cobb releases the access tuner version of their AP so I can create a few extra maps for myself.
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