just installed turndowns, mufflers popping?
10-18-2007, 12:49 AM
#14
6th Gear Member
Join Date: Nov 2004
Location: Tennessee
Posts: 7,797
RE: just installed turndowns, mufflers popping?
All I know is when I open up my exhaust to run open headers, it feels like complete and total ****. There's no other way to explain it. I can tell a difference. Have any of you guys run open headers?
10-18-2007, 10:12 AM
#17
5th Gear Member
Join Date: Jul 2005
Location: Georgia-Gwinnett
Posts: 2,940
RE: just installed turndowns, mufflers popping?
my slps pop on decel a lot, never on acceleration. there basically strait through you can hear the decel pop in this vid near the end of the first run
http://www.youtube.com/watch?v=OJKHPgHCR2I
http://www.youtube.com/watch?v=OJKHPgHCR2I
10-18-2007, 10:47 AM
#18
2nd Gear Member
Join Date: Jun 2006
Location:
Posts: 151
RE: just installed turndowns, mufflers popping?
If the lack of back pressure is bad, why do so many NA guys buy O/R X-H pipes with practically straight through catbacks? I don't understand that...why wouldn't more NA guys be going with catted midpipes? I know for a fact if your boosted you dont want backpressure, but the statement that NA guys should have some backpressure confuses me now. I haven't heard of anyone complaining of lack of backpressure before this and he was just asking about the popping.
10-18-2007, 11:34 AM
#19
3rd Gear Member
Join Date: Oct 2007
Location: Omaha, NE
Posts: 541
RE: just installed turndowns, mufflers popping?
OP: If you are talking about the popping noises from your exhaust when you let off the gas, yes that is fine. If it is sputtering or backfiring or anything like that durring acceleration, not so good.
Everyone Else: Are gears and backpressure always going to come up and be debated this heatedly? Jesus,I haven't been here that long and I have seen it way too much lol.
Everyone Else: Are gears and backpressure always going to come up and be debated this heatedly? Jesus,I haven't been here that long and I have seen it way too much lol.
10-18-2007, 11:50 AM
#20
3rd Gear Member
Join Date: May 2007
Location:
Posts: 910
RE: just installed turndowns, mufflers popping?
optimal backpressure is 0. it's been said thousands of times.
The reason your mufflers are popping = Your exhaust is hot. when you downshift,or left off the gas it creates a vaccuum effect,drawing a little bit of cool air into your exhaust,it rapidly heats up in your exhaust,causing that "popping" sound.
i have turndowns on my 2 chamber flows and it does the same thing,especially when i downshift to 2nd at 50MPH coming up to an intersection or something,i think it sounds badass [8D]
The reason your mufflers are popping = Your exhaust is hot. when you downshift,or left off the gas it creates a vaccuum effect,drawing a little bit of cool air into your exhaust,it rapidly heats up in your exhaust,causing that "popping" sound.
i have turndowns on my 2 chamber flows and it does the same thing,especially when i downshift to 2nd at 50MPH coming up to an intersection or something,i think it sounds badass [8D]