Exhaust restriction since supercharging

[NGOT8R]

Sounds like a possible cat failure. It happened to me and I had aftermarket high flow cats with LTHs. Here is a sound clip of what it sounded like with blown cats.

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[NGOT8R]

I agree that welding in GT500 cats might be in order.

 

[TonyT930]

I’m still suspicious of your cats. It is possible they’ve disintegrated and are now clogging your mufflers. Your Roush setup shouldn’t misfire due to exhaust. I was running the same basic setup through a single 2.5” exhaust and it still pulled clean. I failed cats and then it started misfiring.

This^^^ It's my understanding that stock cats with a supercharger can be a problem. The stock cats are know not to hold up very well. That is coming from a Ford Mechanical that works on Roush Mustangs and Roush trucks.

 

[TonyT930]

This^^^ It's my understanding that stock cats with a supercharger can be a problem. The stock cats are know not to hold up very well. That is coming from a Ford Mechanical that works on Roush Mustangs and Roush trucks.

I really need to proof read my comments before posting. I hope you can understand what I was trying to say.

 

[acemastr]

Moved back to the standard mufflers (non active) and the sound is much more bearable and zero misfires, revs smoothly all the way.

 

[LOL WUT]

Moved back to the standard mufflers (non active) and the sound is much more bearable and zero misfires, revs smoothly all the way.

Any signs of blockage in the active mufflers?

 

[acemastr]

Any signs of blockage in the active mufflers?

None, looked good, even with a borescope

 

[Unbridled5.0]

Does anyone know what the factory active mufflers look like inside? Straight thru? Always wondered since I bought my car... love the function and sound with the steeda x and factory headers/cats.

 

[acemastr]

Does anyone know what the factory active mufflers look like inside? Straight thru? Always wondered since I bought my car... love the function and sound with the steeda x and factory headers/cats.

The active exhaust is straight through on the valved tip.
Non-active is likely a winding chasm lol

 

[Dsand300]

I saw 3 complete GT 500 exhaust manifolds with factory catalytic converors and front exhaust pipes for a 5.2. Can these be adapted to a Borla aftermarket active exhaust cat back system on my 2018 GT. Will the exhaust manifolds bolt to the 5.0?

 

[Dsand300]

Has anyone had experience with the Texas Speed catted header setup?
https://www.texas-speed.com/p-10490-tsp-2015-mustang-50l-gt-headers-and-catted-connection-pipes.aspx
The pricing is comperable to a used GT 500 setup.

 

[engineermike]

5.2 headers will not bolt to 5.0 heads.

 

[LOL WUT]

Has anyone had experience with the Texas Speed catted header setup?
https://www.texas-speed.com/p-10490-tsp-2015-mustang-50l-gt-headers-and-catted-connection-pipes.aspx
The pricing is comperable to a used GT 500 setup.

https://www.mustang6g.com/forums/search/6195055/?q=Texas+Speed&c[title_only]=1&o=date

 

[Dsand300]

5.2 headers will not bolt to 5.0 heads.

Thank you EngineermIke. Are the GT 500 Cats sold seperately or do you need to cut them off the exhaust connection pipe and weld them to the 5.0 exhaust connection pipe in place of the stock catalysts?

 

[Dsand300]

https://www.mustang6g.com/forums/search/6195055/?q=Texas+Speed&c[title_only]=1&o=date

Thank you for the weblink, LOL WUT! I am preparing for another stock catylyst failure for next spring. Car is parked away for the northern winter. It is -7 degrees below zero Fahrenheit here in North Dakota this morning.

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