Yes this is another drone thread. I am wondering if anyone has been able to successfully remove drone with an aftermarket component. (extra muffler, cats, resonators, etc.) My 84 has so much drone I never drive it. I get a headache while driving the car its so bad.

First I started with OBX headers and a magnaflow catback with an x-pipe and the drone was bad. Then I added high flow flowmaster cats to see if those would change the drone frequency or even limit the drone. Of which it did not... Next I decided to add a pair of glasspacks into the system where the factory resonator would have been. Yet again no change in the drone.

Current setup, OBX headers into flowmaster mini cats into x-pipe into glasspacks into magnaflow mufflers.

I am now starting to think factory LT1 mufflers on this car would reduce the drone but I don't think they flow well enough to not choke out the engine. I also hoped installing 3.73's would move the cruising rpm range out of the drone rpm range and again that idea failed. I love my car but the drone is INSANELY irritating. I hardly drive the car because of the drone and my wife hates the car because of the drone.

I feel like the only way to stop the drone is to go Corsa but I don't have the means to spend that kind of money currently. Somebody has to have an option that will work. My next attempt might be to remove the glasspacks and install an actual muffler in place and see how that works. O also the magnaflow system I have I believe is an earlier design which uses the LT1 tips and single inlet single outlet muffler. Any ideas?

 

The folks at MF appear to be quite helpful in this aspect. Have you contacted them and presented the issue?

This is why I'm hesitant to replace my exhaust. I'm real good at spending money on the wrong thing.

Rick

 

You have a total of 4 outlets on the back of your mufflers take a large washer that fits inside the outlet, one on each side and spot weld them in there, you will have to play with the size of the hole in the washer to get the level of noise you want. You can also just stick some steel wool in one of each muffler outlet and see how it sounds. They also sell no drone mufflers I believe corvette central has them.

Here is what I did. https://www.corvetteforum.com/forums...aust-tips.html

 

I have a total of 2 outlets on my mufflers. I do not have the quad tip magnaflows. I have the single outlet mufflers with the LT1 tips.

 

Yes, I have some ideas.

FIRST, IDK what your engine combo is but on stock LT1's changing mufflers doesn't produce any meaningful gain in power...which means that on a 300hp engine, they're "free flowing" enough.

SECOND, try installing a 1/4 Wave pipe

 

I made my drone tolerable by putting HushMat under my carpet. It's kind of expensive and I have heard that there are cheaper alternatives, but it worked for me.

 

Hi

I Agree with Tom400CFI

The standard mufflers are fine, no need to go to the straight thru aftermarket ones. Get some standard mufflers and the drone will be gone.

I had my mufflers replaced a while back, the drone drove me crazy at any part throttle cruise the drone is there.
I got some standard mufflers and am very happy with the quiet ride, still have the loud mufflers in my garage. They will stay there and rust, although people said the car sounded great i hated the drone. And neighbors hated having their windows rattle whenever i went for a drive. I have a modified engine and any minor performance gain with mufflers is not worth the drone, she runs great with the standard mufflers.

 

Maybe I'll get a set of OEM mufflers...
My setup is this. LT1-6-Speed, ported heads, custom cam, longtubes, 3" cat-back, and the necessary accompanying mods. The car ran 12.4 @ 114 with 3.07's. ( I now have 3.73's) I'm just worried that OEM mufflers will hurt performance quite a bit. Anyone running OEM mufflers with a H/C setup?

 

Supertrapps are mufflers that will eliminate the drone !

 

I just can't get over how they look...

 

Does anybody know if OEM mufflers will flow enough for my application? I was also going to consider the OBX catback. I already have their headers and the quality is very good. The drone really can't get much worse so I was going to try the OBX catback. (Looks very similar to the corsa catback.) It's only $429 + Free shipping on amazon. Plus stepping back down to 2.5" won't hurt performance and it should cut down on sound a little.

https://www.corvetteforum.com/forums...x-exhaust.html

https://www.corvetteforum.com/forums...unning-it.html

Couple threads with pictures. My exhaust fits like **** now so I really am not worried about fitment, haha.

 

I am also seeing an amazon complaint that it wasn't in stock. Hopefully it is if I decide to order it..... It does say 2 in stock... hmm

I guess we'll see when the time comes!