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Old 01-28-2012, 05:30 PM   #1 (permalink)
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mcrews's Avatar
Join Date: Oct 2009
Location: Texas
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The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

blackie - '14 nissan altima sv
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air flow over Infiniti Q45 w/IMPUL body kit

On of our british members VIIO, has a software program that does the following:

(based on this photo)

Here's a model of the air velocity affecting your car at 55mph - red is slow (drag/turbulence) and green/blue is full speed air (low drag = good).

This model is of the pressure affecting the car, as you might expect, the air pressure is mainly on the front of the car and creates a bow wave similar to a boat in water. Areas in blue are low pressure and will actually be providing downforce to your car - for example underneath your front airdam lip.

Hope this helps!
Amateur SolidWorks Flow Simulator

We are going to adjust the rear to relect the rear spoiler

MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

First: ScangaugeII

Second: Grille Block

Third: Full underbelly pan

Fourth: rear skirts and 30.4mpg on trip!
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