I have a 70 as well and have had the same experience as Bears-72's post above mine. When you step on it you hear it but it's similar to stock. No drone and it doesn't bother me when towing.

 

Thank you all for your help and suggestions! I think I will go for the 70 and hope the drone will go away. Cheers!

 

Let us know how it works. I put the Banks headers and exhaust on. I also replaced the section they reuse with new pipe. The droning was terrible. We added a flowmaster 40 and it's better but not gone. It isn't a crisp sound like the two on here, or I'd be happy and leave it alone. It's just noisy and sick sounding.

 

Has anyone tried a dual inlet muffler with longer pipes from the exh. Manifold/ collectors eliminating the cat and putting the muffler as far back as possible with a large single outlet.


I think this is what I want to try

 

Thanks, Lance! Did you also replace the restrictive stock Y-pipe (actually it's rather shaped like a T-pipe)? I have the Banks Y-pipe. Sometimes I think the Ford engineers certainly must have had a reason to put such a restrictive Y-pipe, perhaps precisely to avoid the cabin drone?

 

Yes is was for drone and the ya-da ya-da sound. What's that characters' name?
Most people don't realize unrestricted pipes don't come into play until high rpms.

Example; I you fill a 55 gallon drum with a 1/4" garden hose and then fill another one with a 1" hose the time will be the same to a certain point of opening the water valve.

 

SO, BASICALLY YOU ARE SAYING THAT CHANGING THE MUFFLER IS POINTLESS BECAUSE THE DRONE IS BECAUSE I REMOVED THE RESTRICTIVE STOCK Y-PIPE AND REPLACED IT BY ANOTHER Y-PIPE (IN MY CASE THE BANKS Y-PIPE)... THAT ALSO MEANS GETTING RID OF THE DRONE REQUIRES PUTTING BACK THE STOCK Y-PIPE... NOW, THAT WOULD BE REALLY BAD NEWS AFTER ALL THE BUCKS I SPENT ON THE BANKS POWERPACK...

 

Maybe you can get rid of most of the drone somehow but yes I stand by my post. Sellers don't care about what you want/need as long as they get paid and I have faith that the Ford engineers aren't dumb and they won't sacrifice MPG's/HP unless absolutely necessary. Talk to the owner of your local muffler shop.

 

EXv10 speaks to Xv10, that's funny! Anyway, thanks for your support!

 

I know the OP asked about FM 50 and 70 but wondering if anyone had tried straight pipe from cat back minus the muffler? I know this doe sent solve anything with original question.

 

yup, i ran no muffler for over 3 years before putting a glass pack on. I really liked it but when towing more it did make things a bit loud.

 

I know the conversation started about mufflers but then this sub-conversation about the Y pipe came into play also.
I run the Banks headers and Y pipe with the factory cat, muffler and exhaust system. My EX works primarily as our tow rig for our 12k TT, so it's V-10 gets put under some serious loads and it spends a lot of time on the highway in the 2000 to 2400 RPM range with 30 to 60% throttle opening (per my Ultra-Gauge). I get NO DRONE at all, none, period with this setup, there is also no hint of the famed exhaust "flutter". I also got a very noticeable performance increase across the entire RPM range, even just off idle. While I totally agree with EXv10's (first time for everything, j/k Brent) 1/2" vs 1" hoses filling a drum analogy I think once headers are added to the equation the water source valve in that equation gets larger for the analogy. Any amount of equal opening of the valves is biased toward the larger valve (headers) vs the smaller valve (stock manifolds). I did the math, and the interior measurements of the stock manifold just after where the 5th exhaust port enters it is only 20% larger than the interior measurement of any single primary tube of the headers.
The factory "T" pipe was designed as it is to combat the exhaust "flutter" that the V-10 can make in the 1200 to 2200 RPM range, yes it is somewhat of a choke point (the higher the revs the more choke) and some folks have reported a noticeable off idle improvement in pickup by swapping in a Y pipe. But that "T" pipe choke point is downstream of the OTHER choke point, the factory manifolds.
Based on my experience with these parts and what I have read from others and other combinations and results this is my theory. The flutter reports seem to follow folks adding the Y pipe with stock manifolds, flutter with headers and Y pipe seems pretty rare if at all. This leads me to believe the flutter is partly the fault of the manifolds, not solely the "T" pipe. Unfortunately drone seems to be a more complex problem, as all of the exhaust components have a hand in this. Drone is actually just an unpleasant harmonic vibration from the exhaust outlet, all exhausts have harmonic vibrations, that's what we hear, the vibration or sound waves. The exhaust components, revs and engine load determine what the outlet sound waves do. These sound waves actually have more of an impact on our EXs than on the SD trucks with the same components as the sound waves can and will travel better to our ears inside the cab, as the EX cab extends all the way back to the exhaust tip. The trucks have a much better isolation from the sound waves due to the separate beds. With mild cased of drone the problem can be resolved with something as simple as rotating the exhaust tip downward some to redirect the sound waves away from the cab body.
I have been thinking a lot about this lately as I would like to swap in an aftermarket muffler to get a little better sound and what little performance increase it may (or may not) give. But with our typical use drone is a major concern for me. From what info I have researched and feedback from other users I am looking closely at the Aeroturbine 3030XL glasspack with a 3" tip turned slightly down.

 

I like that, Every vehicle I have ever had has has flowmaster a or glass packs. Never ran straight pipes.

 

Tried the straight pipe on Tues, new muffler on Friday. Sounded great idling! Start down the road and that's what it sounded like, a truck with no muffler. The muffler guy said that the ford V8s sounded better than the V10s and the V10s were actually quieter. Anyway went back today, told him I wanted a Flowmaster and first thing he said was the drone was bad. He sold them and would sell me one but he carried a stainless steel muffler, magnaflow he sold for same price, why not. So far ok, not quiet as loud as I wanted but it may be the V10

 

Yes, I put the complete Banks system on. I can't remember the reason for the stupid Y pipe. It was for a noise, but not the droning.