93 Octane
V4 (New 2-step plugs, delphi s55coils)
- New NGK 2-step colder plugs.
- S55 Delphi Coils.
S55 Delphi Coils and 1-step colder plugs gaped to .018 were installed few months back. I now changed plugs to 2-step colder .018 gap.
It feels healthier than before. Smoother and more linear acceleration but somehow it feels less powerful in lower rpms 1-3k.
Highway pull
MHD Stg 2+ 93oct
MST Intake
FTP inlet pipe
ARM downpipe
~65°F ambient temp.
Highway pull
MHD Stg 2+ 93oct
MST Intake
FTP inlet pipe
ARM downpipe
~63°f ambient temp
2021 X3 M40i AA Catted DP MAD Catback
JB4 Map 2