Will open side pipes run cooler?

[Woodz428]

Originally Posted by Excaliber

Well plenty bend in that exhaust system alright!

In spite of the laws of physics regarding heat rises I would think forcing the air DOWN would still be better. The rising air may remain trapped under the hood and mostly recirculate through the fans. Unless there is some directive from SPF to do otherwise, I'd suck the air out and push it under the car myself.

The only reason the fans were wired that way was to lessen the possibilty of picking up debris. That is all well and fine, however, you are attempting to pull the hot air down. What that creates in the way the Coupe is set up is the hot air is then pulled over the heat sensor and causes it to stay hot, while the engine is running the heat never subsides and it causes the thermo switch to stay on. That in turn causes more hot air to be pulled over it and ultimately melts the switch. Again, it defies the laws of physics, and very poorly I might add. I reversed mine when I realized that it was doing that, and they now cycle. Before, and I only have had them kick on a few times, the fans would continue to run until the engine had cooled off, opening the hood after shut down was the only way to shorten their run time.
As far as the side pipes, some people are running them open and I believe that SPF as well as BRE offer open side pipes. I can't speak with any first hand knowledge of those but doubt that (opening them) would lessen the underhood heat much with the factory pipes. The baffles, it would seem, are the big obstacles in the heat flow from the engine. So it seems unlikely that you could reduce the temp that much by just opening the stock pipes.