1967 Coyote Exhaust
01-18-2017, 10:16 AM
#24
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Join Date: Mar 2011
Location: NV
Posts: 10
I thought that I already posted my results here. Anyways, for everyone that was wondering or that my stumble across this here it is.
I ended up purchasing the Borla Crate Muffler Touring Package for the coyote motor. I got 2 "S Type" mufflers and 2 "Touring" Resonators. The resonators + the mufflers are supposed to give it a quieter sound hence the "Touring" option compared to the "S Type". The original system was 3" all the way with the X pipe and mufflers. I had everything cut out and ran dual 2.5" with an X pipe, into the 2.5" resonators, into the 2.5" mufflers, and kept the same exit point and tips through the rear valance.
The overall tone of the car is about the same as the previous mufflers that I had run, both the flowmaster series 50 and the Borla Pro XS mufflers. I am very surprised that there wasn't more of a tone difference between the 3 different exhausts that I tried. Don't get me wrong, it's a great sounding tone, its just surprising the the chamber style flowmaster and the straight through style borla gives the same sound. The Crate Muffler setup is noticeably quieter in the cab but I do wish that it was a bit quieter. The interior resonance is much better and is actually tolerable though. The resonance isn't completely gone but you can carry on a conversation and long drives on the freeway are much better on the ears. I'm sure the change from 3" exhaust pipe to 2.5" made a lot of difference too, I'd be curious to know how much that helped by itself w/o factoring in the muffler change. But I will never know because I'm not spending another dime on the exhaust since I now have around $2,000 sunk into it. The crate mufflers are much fatter than a typical muffler. There is a separate chamber inside the muffler that branches off the straight through pipe that looks like a 1" or 1.5" hole and that must be how the drone is minimized by messing with the sound waves. The Crate Mufflers are expensive and look very well made.
I ended up purchasing the Borla Crate Muffler Touring Package for the coyote motor. I got 2 "S Type" mufflers and 2 "Touring" Resonators. The resonators + the mufflers are supposed to give it a quieter sound hence the "Touring" option compared to the "S Type". The original system was 3" all the way with the X pipe and mufflers. I had everything cut out and ran dual 2.5" with an X pipe, into the 2.5" resonators, into the 2.5" mufflers, and kept the same exit point and tips through the rear valance.
The overall tone of the car is about the same as the previous mufflers that I had run, both the flowmaster series 50 and the Borla Pro XS mufflers. I am very surprised that there wasn't more of a tone difference between the 3 different exhausts that I tried. Don't get me wrong, it's a great sounding tone, its just surprising the the chamber style flowmaster and the straight through style borla gives the same sound. The Crate Muffler setup is noticeably quieter in the cab but I do wish that it was a bit quieter. The interior resonance is much better and is actually tolerable though. The resonance isn't completely gone but you can carry on a conversation and long drives on the freeway are much better on the ears. I'm sure the change from 3" exhaust pipe to 2.5" made a lot of difference too, I'd be curious to know how much that helped by itself w/o factoring in the muffler change. But I will never know because I'm not spending another dime on the exhaust since I now have around $2,000 sunk into it. The crate mufflers are much fatter than a typical muffler. There is a separate chamber inside the muffler that branches off the straight through pipe that looks like a 1" or 1.5" hole and that must be how the drone is minimized by messing with the sound waves. The Crate Mufflers are expensive and look very well made.
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