Resonator delete without crossover

[wjfawb0]

I bought my used 2015 GT mustang a year ago with 30,000 miles on it. The previous owner had the resonator deleted. The shop that did the work simply cut it out and welded straight pipes in its place. There is no crossover.

Is this a common cheap way to delete the resonator? I'm not familiar enough with the S550 exhaust to know what would be involved if I tried to put in an x-pipe (if there is any gain to be had from a crossover). The best I can tell, the bolted flange for one side of the exhaust was lost in the delete, which sucks.

I'll try to post pictures of the state that it is in. Lots of folks tell me it sounds good, and it doesn't bother me. I'm curious if I'm losing some top end or low end due to the lack of crossover. I'm considering a tune to reduce the torque management some, and I want to figure out the exhaust before I move forward.

My ultimate goal for the car is a positive displacement blower just for fun on the street. I don't plan to do more than a test and tune at a drag strip a few times, and it will never see any type of road track. It's going to be a 20 something mpg highway machine for my weekend trips.

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[Jay-rod427]

They left some performance on the table doing that without an H or X pipe. Enough to make it worthwhile? Prob not.

 

[Synyster06Gates]

The stock resonator is two glasspacks without a crossover. It'll be fine.

 

[BmacIL]

Resonator delete without a crossover will make it sound like an old truck. There is performance to be had with a crossover, absolutely. The H will make a little more in the low-to-mid, the X in the mid-to-high. They will also sound a little different, but both much better than straight pipes.

 

[BmacIL]

The stock resonator is two glasspacks without a crossover. It'll be fine.

Not exactly. It's a poor crossover design but there is one. I've gone from stock resonator to an X crossover twice and each time there's a small, but noticeable bump in top-end pull, in addition to the tone improvement.

 

[Synyster06Gates]

Not exactly. It's a poor crossover design but there is one. I've gone from stock resonator to an X crossover twice and each time there's a small, but noticeable bump in top-end pull, in addition to the tone improvement.

According to their patent, there's not.

 

[BmacIL]

According to their patent, there's not.

"The resonator further includes a first and second exhaust conduit extending through the baffle and housing, each conduit in fluidic communication witha separate cylinder bank and including a perforated portion fluidly coupled to that enclosure, each perforated portion positioned in a separate expansion chambers."

Item 314 in that picture shows where the bank-to-bank crossflow would happen. Much, much less effective than an X or H, but it's there.

 

[Jay-rod427]

According to their patent, there's not.

Wrong.

In the pic and wording there is openings in the divider "baffle" connecting the two. Like Bmac said its a piss poor crossover, but there is one.

 

[wjfawb0]

It sounds like I'm going to leave it alone unless I go full retard on the car. My wife will probably keep that from heppening, though.

Many thanks for the patent info and thoughts. I can weld exhaust myself, but I don't have a lift available to make it as easy as I would like.

 

[BmacIL]

It sounds like I'm going to leave it alone unless I go full retard on the car. My wife will probably keep that from heppening, though.

Many thanks for the patent info and thoughts. I can weld exhaust myself, but I don't have a lift available to make it as easy as I would like.

At least doing an H would be relatively easy, even cut and clamp. It's not bad on jackstands.

 

[Jay-rod427]

At least doing an H would be relatively easy, even cut and clamp. It's not bad on jackstands.

He said the previous owner hacked up the connections.

 

[Synyster06Gates]

"The resonator further includes a first and second exhaust conduit extending through the baffle and housing, each conduit in fluidic communication witha separate cylinder bank and including a perforated portion fluidly coupled to that enclosure, each perforated portion positioned in a separate expansion chambers."

Item 314 in that picture shows where the bank-to-bank crossflow would happen. Much, much less effective than an X or H, but it's there.

It's a mutual expansion chamber, sure. But in no way is that a crossover pipe.

 

[BmacIL]

It's a mutual expansion chamber, sure. But in no way is that a crossover pipe.

If it allows any exchange of gasses from the two banks it is a crossover. It's just not a good one for efficient crossflow the way it's designed. We are saying the same thing in a different way. There's a big improvement in tone going from this to an X or H, even a resonated X-pipe like I have which has an overall similar level of volume to the factory resonator.

 

[NightmareMoon]

It doesn't look like a duck, but it does walk and quack like one.

 

[VinnAY]

If you think that there's performance to be had with an H or X you're extremely gullible and just plain ill informed. Sound yes. Performance. Not at all. Certainly nothing you're going to feel and you'd need $$$ a chassis dyno to measure it.

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