[Massive Type IV]

911 fans don't kill engines, they just don't run as cool as other set ups do.

My main emphesis on the tests were to find out what works and what don't, and which ones drwaw the most power.

The 911 fans without a doubt sucked up more power, and the head temperatures were al over the place. Eneven running temps increase your chances of warped heads, cylinders and head leaks due to them. keeping the engine above its optimal temperature also effects efficiency and hurts power as well as fuel economy.

It will gain you some room, but thats about it. It will also gain plenty of eyes from guys that haven't yet found out the truth for themselves.... Alot of guys look up to 911 cooling systems as being the only way to keep an engine cool..... I look down upon them from a position that cost me alot to reach the summit of.