Fister Stage 2 drone at 3k rpm - exhaust leak?
07-26-2021, 12:23 AM
#1
Rennlist Member
Thread Starter
Fister Stage 2 drone at 3k rpm - exhaust leak?
Current setup:
Fabspeed sport exhaust with 200 cel cats mated to the Fister Stage 2 mufflers and big oval tips.
Love the Fister mufflers but I am getting a drone at around 3k rpm when cruising. Would an exhaust leak on the cat to muffler cause this?
Car sounds fine at idle and great under throttle, just when under part throttle cruising it makes a drone noise, that seems to be rather annoying.
Fabspeed sport exhaust with 200 cel cats mated to the Fister Stage 2 mufflers and big oval tips.
Love the Fister mufflers but I am getting a drone at around 3k rpm when cruising. Would an exhaust leak on the cat to muffler cause this?
Car sounds fine at idle and great under throttle, just when under part throttle cruising it makes a drone noise, that seems to be rather annoying.
07-26-2021, 10:31 AM
#3
Rennlist Member
The clamps that hold the Fabspeed pipes (from the X to the cats) were not fully secured on my car and I had a small leak that is now gone. The clamps felt tight but I caught a puff of smoke on a cold startup coming from that area and checked further (because I video my starts occasionally) and found that tiny leak which also altered the sound. I’m new to this so take that for what it’s worth.
07-26-2021, 11:46 AM
#4
Rennlist Member
Thread Starter
The clamps that hold the Fabspeed pipes (from the X to the cats) were not fully secured on my car and I had a small leak that is now gone. The clamps felt tight but I caught a puff of smoke on a cold startup coming from that area and checked further (because I video my starts occasionally) and found that tiny leak which also altered the sound. I’m new to this so take that for what it’s worth.
07-27-2021, 03:46 PM
#5
Rennlist Member
Current setup:
Fabspeed sport exhaust with 200 cel cats mated to the Fister Stage 2 mufflers and big oval tips.
Love the Fister mufflers but I am getting a drone at around 3k rpm when cruising. Would an exhaust leak on the cat to muffler cause this?
Car sounds fine at idle and great under throttle, just when under part throttle cruising it makes a drone noise, that seems to be rather annoying.
Fabspeed sport exhaust with 200 cel cats mated to the Fister Stage 2 mufflers and big oval tips.
Love the Fister mufflers but I am getting a drone at around 3k rpm when cruising. Would an exhaust leak on the cat to muffler cause this?
Car sounds fine at idle and great under throttle, just when under part throttle cruising it makes a drone noise, that seems to be rather annoying.
own form of PSE (Porsche Sport Exhaust) with exhaust flaps. Some have detailed their builds in the forum. Adding a aftermarket flap solution.
Give it sometime. I think you'll get use to it. I regretted going to Fister 3's at first from 2's, because I was starting to hear a little drone. I'm use to it now. You could insulate the rear parcel behind the rear seats if its driving you nuts.
The following users liked this post:
notabot (07-27-2021)
07-27-2021, 05:31 PM
#6
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Join Date: Mar 2017
Location: Philadelphia, Pennsylvania
Posts: 2,483
Received 689 Likes
on
438 Posts
I believe any exhaust combination thats going to increase flow and how loud the exhaust is over all will create a bit of drone. Only way for it to completely disappear is to build your
own form of PSE (Porsche Sport Exhaust) with exhaust flaps. Some have detailed their builds in the forum. Adding a aftermarket flap solution.
Give it sometime. I think you'll get use to it. I regretted going to Fister 3's at first from 2's, because I was starting to hear a little drone. I'm use to it now. You could insulate the rear parcel behind the rear seats if its driving you nuts.
own form of PSE (Porsche Sport Exhaust) with exhaust flaps. Some have detailed their builds in the forum. Adding a aftermarket flap solution.
Give it sometime. I think you'll get use to it. I regretted going to Fister 3's at first from 2's, because I was starting to hear a little drone. I'm use to it now. You could insulate the rear parcel behind the rear seats if its driving you nuts.
Installing a valved cat-back will give you the ability to toggle your tone from stock-ish to a deep aggressive tone. The best of both worlds in many ways.
07-27-2021, 08:47 PM
#7
Rennlist Member
I had the Maxflows with the Fab headers (with heat) and the Fab reflashed DME Motronic, and I got the same drone right around 3,000 rpm. I hated to do it, but I took off the Maxflows and hooked up the original Gillet units to the Fab headers and still have a good sound, but no more drone.
Trending Topics
07-30-2021, 06:21 PM
#8
Rennlist Member
I had the Maxflows with the Fab headers (with heat) and the Fab reflashed DME Motronic, and I got the same drone right around 3,000 rpm. I hated to do it, but I took off the Maxflows and hooked up the original Gillet units to the Fab headers and still have a good sound, but no more drone.
07-30-2021, 08:03 PM
#9
Rennlist Member
911F, I am using the original cats.
07-31-2021, 04:09 AM
#10
Rennlist Member
Thread Starter
Decided it was just the engine note and if I go on long boring drives at 3k rpm i will just roll
up the windows 🤘
up the windows 🤘