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I have a 2000 Coupe, pretty much bone stock except a K & N with an "opened" air box. Did the Dremel thing.
I've noticed that under hard acceleration (2-3500 RPM ish pulling from a stop or going up an onramp) that I can hear what sounds like a muffleld Chuging sound. Kinda what an old steam locomotive sounds like. The sound does vary with RPM and is only present when the engine is under load. I remember my dad's old 1970 Commander Motorhome (With a Dodge 440) made this sound on acceleration. Is this a normal sound for an OHV V8?