Ecoboost rear muffler/resonator removal?

[Adieu]

That is complete BS. The 3.5 Ecoboost doesn’t use an EGR it uses VCT.



OP you’ll be fine removing that muffler if you want

Huh... VCT has nothing to do with it, but indeed no EGR.

Good work Ford, surprised they managed to pass emissions without EGR on a 100+ hp/ litre forced induction engine in this day and age. I thought it was unavoidable in this day and age.

However.... back pressure affecting turbos is still a concern. It should get nore boost than it does with an intact muffler, idk whether or not it has the ability to adjust it accordingly

 

[07xln]

Variable Cam Timing has everything to do with it. If you look it up it’s used in replacement of egr’s. EGR's to my knowledge have never been used on any Ecoboost version and haven't been used on any of Fords NA gas motors for like the last 10yrs. Theyre only used on the diesels. Even then a lot of the times those guys will do an egr delete and run straight pipe to remove the cats and dpf. Theyre certainly not complaining of poor performance

You'll lose a little boost true (in this case maybe half a psi) but only because you're increasing exhaust flow which is good. As I said I doubt any performance gain or loss would be noticed

 

[Boose]

EGR introduces exhaust gasses into the incoming intake charge to aid in the complete burning off of hydrocarbons no? How would cam timing negate the need for this? I could see cam lobe profile perhaps to control valve overlap. But keeping the relationship of intake to exhaust valve constant doesn't change that... Am I missing something? I could see EGR not being used on a forced induction as there is extra airflow when under boost as well as the need for a vacuum environment for EGR to function.

 

[99WhiteC5Coupe]

Hi Guys- Just brought home my 4th Expedition yesterday, 2017 limited 4x4. Looking to remove the hideous secondary muffler hanging below the rear bumper, and just run a straight pipe. Has anyone done this? Any affect on sound or performance? Thanks much! -Aaron

I own a 2015 Expediton Limited 4x4 with the same exhaust system. What is hideous about the muffler?

 

[07xln]

EGR introduces exhaust gasses into the incoming intake charge to aid in the complete burning off of hydrocarbons no? How would cam timing negate the need for this? I could see cam lobe profile perhaps to control valve overlap. But keeping the relationship of intake to exhaust valve constant doesn't change that... Am I missing something? I could see EGR not being used on a forced induction as there is extra airflow when under boost as well as the need for a vacuum environment for EGR to function.

WOW!!!! I'm not making this stuff up people


Variable Camshaft Timing (VCT) is an automobile variable valve timing technology developed by Ford The use of variable camshaft timing on the exhaust camshaft is for improved emissions, and vehicles with VCT on the exhaust camshaft do not require exhaust gas recirculation (EGR) as retarding the exhaust cam timing achieves the same result

 

[Boose]

not doubting you... just curious. I've built a few forced induction motors, and never made this connection before. VCT is far more commonly mentioned as a reason for both increased low RPM torque as well as higher RPM HP. The ability to vary the cam's timing with RPMs and throttle position have really opened p the breathing on internal combustion engines. I would think that the removal of EGR would be a byproduct of as opposed to a featured benefit. I'm interested in reading up on your link, what was the source if I may ask?

 

[Adieu]

EGR removal is ALWAYS a benefit

Its nasty on the engine AND horrible for the environment, because it reduces the size of the hydrocarbons in question making them far more harmful. Its more of a diesel-related illustration, but basically EGR-equipped trucks emit less visible ugly grimy soot, having instead burned it into microscopic particulates that actually get INTO your skin and tissues and give you lovely respiratory issues and cancer and make your kids grow up with learning disabilities.... yay go clean air initiatives!!!

However it does help bring tailpipe emissions into COMPLIANCE, because our rudimentary standards measure specific particulates only and could care less what other things come out in their place


... CARB EPA etc are all run by barely literate bureaucrats, and the standards they and lobbies push for promote a "doesnt matter if it's far worse, what we care about is compliance only" mindset.

 

[Flexpedition]

I own a 2015 Expediton Limited 4x4 with the same exhaust system. What is hideous about the muffler?

versus

 

[Adieu]

versus

2k15 LOOKS better

vs

07-14 is more practical

 

[JExpedition07]

I’m not a fan of the big muffler out the back i like the pipe out the side better. Had to pick a better pic of the earlier 3rd gen lol, that puke earth color was awful.