Spark Knock after prochamber?

[zeevann]

after installing my prochamber, i hear what i believe to be spark knock. its around 2-3k when lightly accelerating. I returned it to stock tune and it still does it. Is this just the un-muffled noise of the engine or is this truly spark knock. Its kind of a chugging noise with a hint of knock if this makes sense also between 2-3.5k when getting on the throttle the exhaust seems to vibrate loudly. if anyone has any suggestions or experience please let me know thanks again stangnet

 

[BurningRubber]

What kind of mufflers are you running?

A Prochamber is inbetween an X and an H pipe and may hold some of the raspy "tin can" aspects of an X pipe... that would be my guess depending on muffler setup.

 

[Stark77]

I hear no such noises with my prochamber. If my car shifts into 4th at a low speed and i lightly accelerate - while still in 4th - it will make an echoing "chugging" noise. But definitely not a knock.

 

[zeevann]

im thinking its just a chug but i get nervous its my baby i have a mac cat back btw

 

[Stark77]

If you haven't had it very long - I would suggest driving a bit more - it will "break in" and the tone will change a bit from my experiences. Also, that paint they use will produce a pretty foul smell.

 

[Mossberg]

I have no noises with my Prochamber other than the slight sound of the exhaust gases wooshing through the chamber under me. And I don't even notice that anymore.