If I gut the cat will the back pressure still open up the ports?
#1
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If I gut the cat will the back pressure still open up the ports?
Just wondering, I was also wondering since I have a S4 if I can get rid of the air pump and get the block off plates since my cat opens the ports. Thanks
#2
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If you gut the main cat, in most cases there won't be sufficent pressure to open the Aux Ports, as well as be breaking several federal and in many cases state laws.
If you remove the cat or the guts of the cat you could remove the air pump and block off the ACV, but the car will probably backfire on lift throttle situations.
If you remove the cat or the guts of the cat you could remove the air pump and block off the ACV, but the car will probably backfire on lift throttle situations.
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I have a Bonez Superflo and the ports do open. Prior to that I had a gutted cat. My ports did open with it. You might have problems if you are running a large diameter (above 2 1/2") exhaust, freer flowing mufflers, etc. Not sure about, though.
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I dont have a presilencer I just have a header and a race pipe, thats why instead of putting in the race pipe I would gut the cat so my ports will still open
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#10
Former Moderator. RIP Icemark.
pretty common to have the stock cat back still have enough pressure, to activate the aux ports, but when you go to a more free flowing design with no cats you probably won't have enough back pressure.
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