Lq9 popping under acceleration
09-10-2016, 12:57 PM
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Lq9 popping under acceleration
I have an xcsb obs with 2005 lq9 swap. Flowmaster 2 into1 collector and 3" magnaflow muffler. No cats custom tuned to delete all smog and rear o2 . Engine runs great and have no issues except an annoying popping under acceleration anything over 3/8-1/2 throttle is has a stupid rapid popping sound. Any ideas? Please help.
09-11-2016, 12:23 AM
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Since doing the lq9 swap I have had a flowmaster 10 flowmaster 40. Magnaflow bullet and magnaflow 9" oval all do it to some degree. The magnaflow oval makes the least amount of cracking
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09-11-2016, 01:10 AM
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I believe it's 18" long. But it's not a super loud muffler. When it's not crackling it sounds great. Was thinking either an exhaust leak somewhere that I cannot find. Or maybe two unto one isn't enough exhaust for the 6.0? Idk though that's why I'm asking
