front air dam, correct ride height? Options

[Trekkor]

I'm setting up a custom rubber flex dam off an LE F/G dam.

I want the clearance to be the ABSOLUTE minimum.

How much room should I allow?

Can't limbo under my dam. (IMG:style_emoticons/default/jester.gif)

Flexy T

[maf914]

There's a reason Porsche added the two "air flaps" on the front lip of the engine bay in 1973.  Those two guys stir up the air to create turbulence and get more air up around the engine and cool it.

There are a lot of opinions about the two flaps Porsche added. I don't think they are there to create turbulence, but are there to direct the airlow from the floor pan down and away from the areas under the cylinders and heads, creating a low pressure area that lets the pressurized cooling air from the cooling fan and shroud exit from the cylinders and heads more easily. The fact that they didn't use a single flap across the engine bay makes me wonder if they wanted some airflow across the finned bottom of the sump. I don't know how much cooling occurs at the sump. It seems it would be relatively small.

I've also wondered about the effects front spoilers have on 914 cooling. I still think someone needs to get a 914 into a full scale rolling road wind tunnel and test out all of our theories! (IMG:style_emoticons/default/laugh.gif)