Hello, i’m owner of a 1986 RX-7 NA.
recently i deleted my air pump, and also made a custom 3” exhaust system.
Since the upgrade i’ve been hearing a loud ticking coming from my engine bay. I feel like the ticking had allways been there, but it got louder since then.
It’s very hearable on idle, and also in low rpms, also when i let go of the throttle, it sounds like something metal is clunking/fluttering.

Video: https://streamable.com/gspre

i’ll attach a video file where both sounds are audible, and i hope someone will je able to shed some light on this situation.
I’m at a loss, thanks in advance

A belgian FC owner

 

I can't hear or see very much going on in the video. However, I'd say verify you followed the air pump delete process properly. If that checks out, verify there's no exhaust leaks (especially between the header and the motor). Also, this is an S4 N/A so I'm guessing your secondary intake ports have been wired open? If so, do a search for common problems associated with the mod and see if these noises are normal. At least you'll have some place to start while you wait for someone else to chime in.