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Old 07-20-2016, 02:16 PM   #1
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Dyno Testing EcoBoost

Hello

How do shops dyno test EcoBoost engines?

or

How do they replicate the air being forced into the engine?
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Old 07-20-2016, 02:27 PM   #2
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The test them just like any other car. They don't have to replicate the air being forced in, the turbo charger that is part of the engine does it. The turbo doesn't know if the car is going down the road or if it's strapped to a dyno, once a load is on the engine it spools up and forces air into the engine

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Old 07-21-2016, 10:42 AM   #3
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Hello

I am an AC contractor & Plumber and not a car mechanic.

It seems to me that the faster the cars moves forward, it is forcing more air into the air intake ( building the static pressure like in an AC) allowing the turbo to jam additional air into the engine. I am pretty sure they put the air intake on the front of the car so air is forced in when the car is moving as opposed to drawing air from under or behind the car.

So a stationary car on dyno would get one reading vs the same car moving at 100 mph forcing that much more air into the intake.

I guess it depends on the capacity of the turbo to move air.

Maybe we have an engineer here on this forum board who can chime in.
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Old 07-21-2016, 10:48 AM   #4
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from a machine mechanic.....it depends on if the intake is in a high or low psi zone. idk but I'd be willing to bet beverage the difference in static/moving is with the standard error of the dyno.

and don't they normally use lg fans to cool car that will give some FI (once again on paper only)
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Old 07-21-2016, 11:02 AM   #5
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Quote:
Originally Posted by Strange Mud View Post
from a machine mechanic.....it depends on if the intake is in a high or low psi zone. idk but I'd be willing to bet beverage the difference in static/moving is with the standard error of the dyno.

and don't they normally use lg fans to cool car that will give some FI (once again on paper only)
Standard error meaning NO difference between stationary vs moving?
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Old 07-21-2016, 11:55 AM   #6
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you will get variance between different dyno's....I would GUESS that difference is equal to moving/not moving. What is more important is if you are looking for a base line to compare mods and HP to keep going to the same dyno.
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Old 07-21-2016, 12:43 PM   #7
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I watched a Ecoboost mustang get dyno'd and they placed a large fan in front of it.


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Old 07-21-2016, 01:38 PM   #8
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The big fan in front of a car on a dyno is just for cooling purposes.
It has nothing to do with "ram" air or anything like that.
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Old 07-21-2016, 01:43 PM   #9
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I watched a Ecoboost mustang get dyno'd and they placed a large fan in front of it.


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This is done to combat heat soak and keep the engine from overheating as quickly.

There is very little benefit in the best of cases for the vehicle to be moving.
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