[jandref321]

Originally Posted by greddy91

False. There is no crossbank manny on the E70 non-TU. 1-4 on one turbo, 5-8 on the other. The TU manny is crossbank.

I am not arguing the firing order at all... I don't understand why we're stuck on that. The TU manny (and F10 M5) "design" improvement is that the flow is concentrated and consistently pulsing the exhaust wheel of each turbo.

Overall I'm agreeing with most everything you guys said - this would be better, it has been done before, the design is superior, gains are to be had... etc.

I took these first two photos just now on my 2012 E70 X5M with non-TU S63 engine...They are crossbank.




Here are three different crops from three different 2012 X5M brochures showing that the headers are crossbank and in the same order as TU headers:





Here is an article from 2009 describing the new cross bank manifold on the new BMW X5M engine: S63

http://www.bimmerfile.com/2009/05/01...otor-in-depth/


Here is an engineering journal where some smart guys talk about their new development on the E70 X5M engine in January 2010:


https://link.springer.com/article/10.1007/BF03227014


Here is an article on the world premier of the 2010 E70 X5M detailing the cross bank manifold invention:

https://www.autoguide.com/auto-news/...auto-show.html