View Single Post
      12-14-2013, 02:41 PM   #83
Major General

Drives: 2015 M3 6MT
Join Date: May 2013
Location: Seattle

iTrader: (0)

Originally Posted by Boss330 View Post
And as shown in my previous post it's not inconceivable that the S55 only needs 1bar to achieve the 430hp, meaning that at the 183 number we could be well over 500hp at sea level etc. Leaving lots of room for even higher boost...
The N54 gains about 80 hp with a 20-22psi ( 12 psi above stock ) tune according to this chart:

Not seeing how say 4psi would add the same gains on the S55.

Btw do you know if the S63TU tune requires euro 100 octane to reach 700 hp?