Dyno Testing Q's

[jadney@vwtype3.org (Melissa & Jim)]

>From: CARVER_JEFFREY@aphub.aerojetpd.com (Jeff Carver)

>Here's my problem with the way the test is performed.
>
>I observed a standard front wheel drive car.  Drive (front) wheels on 
>the dyno.  To provide air to the radiator (to simulate air flow) they 
>placed a fan in front of the radiator.
>
>My question -
>Has anyone ever had a VW dyno tested?  and if so what 
>about the lack of airflow to the engine.  How did they deal with 
>that, or was the test short enough to not heat the engine up?  I know 
>that my bus relies on travel through the air to provide cooling to 
>the engine compartment, as idling raises temperature quickly.

Our cooling fans push an amount of air that is adequate to cool the engine.  
With a T3 in motion, Bernoulli's principle states that the air pressure will 
be REDUCED at the air intake at the surface of the fenders.  My first T3 was 
dyno tested years ago with no ill effects.

Your comment about your bus heating up at idle makes me wonder if it is 
pulling its cooling air from the hot air below the van.  You may need to 
replace some seals, or do some rust repair underneath.

Jim
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       Melissa Kepner                                    Jim Adney
       jadney@vwtype3.org              jadney@vwtype3.org
                             Laura Kepner-Adney
                             Madison, Wisconsin
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