Cold Air Intake Proof

mazdatenfive · Postby **mazdatenfive** » Mon Mar 14, 2011 9:06 am

Just wondering. This could be a can or worms.

Is there any technical proof that louvred NA head light lids contribute to cold air intake or does the hot air from the outside just cool the hot air under the bonnet.

Do the louvres actually catch any air at all be it hot or cold?

Would more air gain entry to engine bay with the lids removed altogether?

93_Clubman · Postby **93_Clubman** » Mon Mar 14, 2011 10:45 am

See MX52NV's posts in the following:
viewtopic.php?f=28&t=33340&p=430464
viewtopic.php?f=28&t=34485&p=445919
viewtopic.php?f=29&t=33837&p=448313
viewtopic.php?f=29&t=42167&p=541787

Matty · Postby **Matty** » Mon Mar 14, 2011 8:25 pm

+

????

Seriously, it's not that hard.

But from a theoretical viewing, the position of the headlight covers would be a low pressure zone on the body, so more likely to act as extraction vents for the engine bay. You could tell this in a few seconds with some woollen telltales on the edge of the lid

Jeo · Postby **Jeo** » Mon Mar 14, 2011 11:08 pm

Read the second last post in this thread.

mazdatenfive · Postby **mazdatenfive** » Mon Mar 14, 2011 11:49 pm

Jeo wrote:Read the second last post in this thread.

Thanks Jeo, that explains it all in great detail.

Postby **NitroDann** » Mon Mar 21, 2011 12:53 pm

The important part is not the temp of the air under the bonnet but the actual intake air temp.

Anybody with an aftermarket computer who tunes it themselves can tell you the best air intake mods because they can watch and datalog air intake temp (AIT).

Running no bonnet helps, no headliughts helps, but realistically the best improvements I found was proper heat sheilding and the firewall style intake, with the hole in the intake and a large properly heat shielded (read ugly) pod filter enclosure.

Compared to stock air box temps of 55-58 degrees depending on weather, with this setup I manage to get usually about 5 degrees above ambient.

I also run E85 so my actual inlet runner IAT is probably considerably below ambient.

Dann