It's no problem addressing questions:
I can only speak of my own expieriences with regarding the plastic meter longevity question.
I did not have any claims with the Pro-M plastic bullett meters I used to carry.
The factory meters are plastic and if their warranty claims were such that it was costing them more with problems due to warpage than switching to another material they probably would have.
The SCT big mouth meters are plastic and I'm unaware of issues with them regarding the plastic construction.
Plastic stays cool with airflow, even 'at idle' airflow and I haven't had any problems with my plastic meters. My CNC progam allows a nice CORRECT NECK LENGTH for filter attachment just as the other companies meters.
If you go back and read the shootout article closely you'll find a notation regarding 'neck length' . This will make a difference in filter retention.
I have had NO warpage problems with the TB pipes or meters in the 05/06 systems. MD retained/installed their system in July and have related no problems, or with their customers.
When I began carrying the metal meters it was no surprise that many inquiries wanted to know if they could get them in plastic. I've had the plastic and metal in my Mustang and the metal is noticably hotter after the motor gets hot and especially in the summer months. It attains a higher temperature than the rest of the plastic system. All I have to do is put my hand on the different parts of the system and feel which is hotter.
Murillo noted, if you read the article on my site, that there was NO DIFFERENCE IN THE TUNE, with engine heat soak.
Sometimes simple logic is what decisions are based on.
JP..after reading over your reply, you bring up a very good point..However, what you didn't mention about the factory plastic meters are 2 very important factors.. First of all.. the factory meter is part of the factory air box, which also retained the factory panel filter. And second..the plastic materials in the factory meter itself, are constructed from a thick rotomolded design, which is why Ford did not experience any type of warpage problems..As for the SCT big mouth and Pro-M meters..YES, I definitely agree 100% with you, and here's why..both of those meters are constructed, from the very same rotomolded design, found in the factory meters, in fact..Granatelli Motorsports is working on a CAI kit. that will be using a MAF, similar to the SCT big mouth, which retains the stock MAF sensor.. Therefore what I don't understand is.. why not just re-design the SCT meter, and incorportate it as part of you're system ?? this way, there is no doubt about longevity issues..