View Single Post
      12-14-2013, 02:30 PM   #76
Brigadier General

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

iTrader: (0)

Originally Posted by Boss330 View Post
Why? (To the last paragraph)

The S63 in the F10 M5 has a 10:1 CR and that engine has been tuned by Manhart to a proven 700-750hp. The S63 has a stock max boost of 1,5bar... The Manhart MHR 5/6S has a 30% increase in power over stock (560 vs 700-750). A 30% increase on the S55 is 560hp.

Why should the S55 not achieve the same gains seen on other similar engines?
The S55 is a similar engine to the S63TU?
It does sound like an impressive tune though. I need to look into this example because it could be the first one provided here that might support your claim of easy, large ECU flash power gains of the S55 and the ability run combustion pressure on street gas I've not been able to find other examples of alternatively that the stock turbos are capable of much more volume than that M utilizes. And it being a turbo M car makes it even more relevant but I need to see the details of the S63TU and the tune to know if it's potentially applicable to the S55. We are both speculating and using questionable science here but we should be able to still get a reasonable idea of the potential.

Last edited by solstice; 12-14-2013 at 02:39 PM..