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Undertray Ducting

Undertray Ducting

Undertray Ducting

(OP)
I am currently designing an undertray for my Mazda Miata.  The tray will be used in conjunction with a new front end and rear diffuser in an effort to generate downforce or, at the very least, look pretty when the car is upside down.   

This is more of a pet project than anything.  I'm not expecting great results, but I don't want to create any problems, either.  My primary concern is transmission cooling.  A sealed flat bottom will inevitably result in a cooked gearbox.  Seeing as I've already eaten four due to sheer HP, I'm not fond of this idea.  

Getting to the point, what sort of ducting should I incorporate to create airflow over the transmission?  A NACA duct probably wouldn't provide enough flow to be effective, and all of my other ideas would create too much flow disturbance to make the undertray worthwhile.  I would prefer not to install a transmission cooler, but I won't rule it out.

Thanks in advance.

--straylight--

RE: Undertray Ducting

Auto or stick shift?
If a stick (my assumption) there are other possibilities besides cooling that could extend your trans life.
more frequent trans oil changes, different viscosity fluid, or just not driving :)

If an auto just do yourself a favor and get an extra cooler and a magnafine filter.

RE: Undertray Ducting

(OP)
Stick shift, of course!  Who in their right mind would go to this much work for an automatic, .  A sequential transmission is in the works, but that is a long ways off unless a sponsor puts up a great deal of the cash.

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