Has anyone dynoed before and after removing the intake flap

Obioban · 20-07-2014, 01:52 PM

Recently a good number of members with CSL (and replica) air boxes have been retrofitting the full CSL ecu tune (and associated wiring changes), and basing their custom tunes on that instead of the stock M3 tune.

Some of them have started retrofitting the intake flap as well, under the assumption that it has a DISA like effect in addition to noise control.

e.g. http://www.m3forum.net/m3forum/showt...p?p=1066740021

From reading this forum over the years, I've always been under the impression that the flap was for sound control only. But, seems like that might not be the case? Have any of you done before and after dynos after removing the flap?

20-07-2014, 01:52 PM	#1
Obioban S2 - Picking it up Join Date: Dec 2010 Posts: 34 Casino cash: $842	Has anyone dynoed before and after removing the intake flap Recently a good number of members with CSL (and replica) air boxes have been retrofitting the full CSL ecu tune (and associated wiring changes), and basing their custom tunes on that instead of the stock M3 tune. Some of them have started retrofitting the intake flap as well, under the assumption that it has a DISA like effect in addition to noise control. e.g. http://www.m3forum.net/m3forum/showt...p?p=1066740021 From reading this forum over the years, I've always been under the impression that the flap was for sound control only. But, seems like that might not be the case? Have any of you done before and after dynos after removing the flap? __________________ Current Cars: 2005 IR/IR M3, 2001 LMB/blk M5, 04 M3 wagon, 2017 i3 Past cars: 04 M3, 03 530i, 96 M3, S50B32 e36 M3 CM race car