|
Great post.
On my 2006 Z4M Roadster I have an Evolve CSL style intake, SuperSprint v1 Stepped Headers, Stepped Section 1, X-Pipe and SuperSprint Street Mufflers. I have a tune from Randy at EPIC.
I did a pre-upgrade dyno, but have not done a post-upgrade dyno as I still have a "service engine soon" light that I want to address before doing another dyno.
I do not have massive low RPM throttle response issues, but I do detect some flatness down low. I need to do some more track driving to get a better idea of it - I've only had one track day due to COVID.
I will follow and contribute to this thread where possible.
|