Thread revival II:

Can anyone recommend a short (meaning doesn't stick out from under plastics much) ABS vent similar to the the one modshack used?

I'm thinking of adding one that is open in front and back to flow air through and even offer a tiny bit of extra downforce if anything.

Problem: Does any air even flow under there, at least on the sport package?

The front chin spoiler might keep air from ducking unde there, and if no air is going under there anyway, a few slits and (maybe a piece of mesh for rocks?) is more than enough.

If some air does flow, then a little rectangular duct, ported on both sides, should cool the sump, especially with added heat sinks (I have the arc cool fins, which work really, really well).

Thoughts?

There will be plenty of air movement in that area in general already, but getting the pressure and flow in the right direction(s) would be tricky. If any air is flowing through holes in the undertray, you want it to be upwards flow (sucking from the ground up into the engine bay), so that it's moving in the direction that helps rather than hurts front downforce. The potential problem is that, assuming the rest of the bay/hood is stock, there might be so much air pressure from the backside of the radiator that any vent you cut down there ends up flowing outwards and screwing that up. I really have no idea, all you could do is guess/test. If you had a hood vented to exhaust the pressure from the backside of the rad fans upwards (as is being discussed endlessly in other threads currently) the pressure would be a non-issue, but then you'd probably have plenty of airflow in/around there without cutting any new slits anyways.

Either way, I don't think it would be a good idea in any scenario to cut any slits/holes in the front chin spoiler.

Oh sorry -- I wasn't clear at all on that.

I meant, "to cut slits in the under panel", not the chin spoiler, but the rest of your explanation is pretty much what I figured: either a crap shoot without testing or will do no additional cooling.

For those who were asking before -- ta daaaa

Behold. Ugly but functional:

http://www.the370z.com/members/jordo...40606-0000.jpg

I also have two stuck on my diff cover :tup: