Here's a few observations and some input comparing your heatshield and mine, and the results you have achieved. Now, before anyone flames me, I don't have a graph plotting out my results,nor am I putting down Paul's heatshield design, I'm just trying to provide some insight to his results and illustrate some design differences.
First of all, pics of my heatshield...
[img]http://www.fototime.com/ftweb/bin/ft.dll/standard?pictid={224AF14B-95D6-4972-AC44-A89FE06A8A89}[/img]
[img]http://www.fototime.com/ftweb/bin/ft.dll/standard?pictid={2E4AEBD8-6FF2-4E2D-86B9-47BBC52BCE4B}[/img]
Now, there are several major differences in our two designs that I would like to point out that would cause different results. First of all, your heat shield appears to be made of metal, with tends to absorb heat. Mine, is made of a heat resistant plastic, which transmits heat less. Secondly, I installed my heat shield so that my MAF would be shielded from engine heat as well, given that I had noticed on numerous occasions prior to its installation that the MAF would be as hot to the touch as the upper manifold. Not good, in my books. THirdly, and lastly, your heat shield is a closed design which wraps around the air filter, "restricting", if you will, pathways for the air to flow to the filter somewhat, which may account for the higher temperatures at speed. With mine, it is a straight across design, blocking engine heat from anything beyond the battery, in fact,it uses the battery as part of the shield as well. I used to have a bad pinging problem on hot summer days when I drove aggressively, but since I installed the heat shield two summers ago, it has disappeared. The filter and MAF are cool to the touch as well, after agressive driving. Not so before the shield.
