Exhaust Poping Problem

fourmula · April 5, 2008

I have an 03 5.3 chevy silverado i had the catalytic converters off and had a aero 3030 exhaust on it, but they did just left it half ways not all they way back. When i let go of the gas it makes this wierd poping sounds can anybody help me.

mikystyle · April 5, 2008

Has to deal with backpressure. Im not an exhaust expert but im going to say you probably need some more backpressure. What size pipe you have? probably 3" all the way out right?

fourmula · April 5, 2008

Has to deal with backpressure. Im not an exhaust expert but im going to say you probably need some more backpressure. What size pipe you have? probably 3" all the way out right?

well its just half ways and the the pipe was the 2 1\4 factory pipe

fourmula · April 5, 2008

this is the exhuast

omegafiler · April 5, 2008

Put the cats back on.

marko · April 5, 2008

Maybe your exhaust is Catholic.

mikystyle · April 5, 2008

i know sometimes these trucks need the backpressure supplied from the cats. Putting on a set of hi-flow cats will probably stop the popping and restore some bottom end that u may have lost too.

wlvrn1215 · April 5, 2008

no backpressure = popping...put the cats back on. ...or put some high flow ones on. Your loosing your low end.

marko · April 5, 2008

np sense of humour = boring thread!

sno · April 5, 2008

I can't believe all these posts about "needing" back-pressure. Trying to re-burn exhaust is bad.

What you want is a properly designed system that scavenges the exhaust gasses completely (ie no back pressure at all). The popping sound is proof that your current setup is not doing this. You can do several things to improve scavenging without adding restriction (aka back pressure) to the system. It'll take some time and money, but adding or moving H-pipes or X-pipes, changing pipe diameter, length and/or manifolds should give you the desired results.