dgilb98 Posted March 19, 2020 Report Share Posted March 19, 2020 Hi everyone! So recently I got the dual resonators off the rear of my journey, love the sounds so i was thinking of taking the mid muffler off as well. Has anyone else done this and if so how does it sound? Is the drone worse with both off? And is it okay to take both off and have a cat-back straight pipe? Will I lose more back-pressure? Thank you! Quote Link to comment Share on other sites More sharing options...
NavalLacrosse Posted March 19, 2020 Report Share Posted March 19, 2020 (edited) I'm totally not an expert, Although I'm thinking that the Pentastar is not high enough performance engine to depend on backpressure, or lack thereof. It's my gut feeling (based on literally nothing, as I said I've got no expertise) is that you're not going to see any measurable gain or loss, provided you keep the pipe diameter the same, and run it aproximatly the whole length of the OEM's system. I'd leave the existing pipe because: if it sounds good as is, no reason to remove it, as it reduces the amount of extra cost in fabricating a replacement segment. I'm thinking you're best looking at the information on the Charger and Challenger V6 performance forums, because you'll likely get better information on straight-piping, or cat-backing the Pentastar. Edited March 19, 2020 by NavalLacrosse Armando G and John/Horace 2 Quote Link to comment Share on other sites More sharing options...
jkeaton Posted March 20, 2020 Report Share Posted March 20, 2020 Back pressure is a myth so throw that concern out. It will drone. Big time. Quote Link to comment Share on other sites More sharing options...
John/Horace Posted March 20, 2020 Report Share Posted March 20, 2020 I think back pressure occasionally matters. But very rarely. I had a 1979 Russian car called a Lada , body was 20:yr old Fiat 124 design IIRCC and engine was ancient 4 cyclinder 1.5 liter VW design of some sort. People called it a Lada trouble, which it was. Exhaust broke right at exhaust manifold and I had to drive it a few days during college exams. Car lost about 50 percent of power so it strangely needed back pressure. It was a single overhead cam design. Power came back with mig welded sleeve repair. Carburetor with manual choke pull lever. There was a place for a manual hand crank to fit into front of engine crank pulley. But retrofitted canadian bumpers covered the spot where crank linkage needed to go through. Always want to drill out hole to try and hand crank the engine. Car had its own tool kit, with manual pump strong enough to actually pump up a car tire. I learned more about car repair in 12 months of ownership then I have ever learned since. To keep one on the road you needed a separate parts car. Which you could buy for $50 in 1984. Summer Solstice and OhareFred 2 Quote Link to comment Share on other sites More sharing options...
John/Horace Posted March 21, 2020 Report Share Posted March 21, 2020 A whip lash inducing 83 HP. Quote Link to comment Share on other sites More sharing options...
Summer Solstice Posted March 21, 2020 Report Share Posted March 21, 2020 14 hours ago, John/Horace said: A whip lash inducing 83 HP. That thing just looks fast! Quote Link to comment Share on other sites More sharing options...
John/Horace Posted March 21, 2020 Report Share Posted March 21, 2020 Very simple but crude vehicle. Very slow because of heavy weight under powered engine, fuel economy not horrible. Exhaust pipes and other metal very thick so you could fix stuff your self. No catalytic converter I think was why back pressure mattered. Just a catalytic by itself could be the minimal back pressure a 4 stroke normally aspirated engine needs. Entire electrical system wired with four colors of wire. Trying to trace an issue not exactly easy to do. Tool kit from car hilarious but functional. I still have two metric wrenches from the kit. Excellent strength steel, but machining and forging very ruff. One wrench has the size stamping mixed up. Small 10 mm end says 13 and vice versa. Bad vodka day maybe. Quote Link to comment Share on other sites More sharing options...
John/Horace Posted March 21, 2020 Report Share Posted March 21, 2020 (edited) Quote When someone complains about their current car being unreliable crap...it bothers me. We are spoiled in so many ways that the real junk of the past no one really remembers now. Perspective matters. Edited March 21, 2020 by John/Horace Forgot caption. Armando G 1 Quote Link to comment Share on other sites More sharing options...
Summer Solstice Posted March 21, 2020 Report Share Posted March 21, 2020 ^^^^ It seems that no one knows how to fix an exhaust with a soap can and a coat hanger anymore. John/Horace 1 Quote Link to comment Share on other sites More sharing options...
John/Horace Posted March 27, 2020 Report Share Posted March 27, 2020 Fix, who said anything about fix. Maybe it’s just a Russian thing, love Japlopnik site sometimes. https://jalopnik.com/those-crazy-russian-bastards-built-both-the-loudest-and-1842529472 Quote Link to comment Share on other sites More sharing options...
Summer Solstice Posted March 28, 2020 Report Share Posted March 28, 2020 ^^^^^^^^^ I work around race engines but I haven't seen quality engineering on that scale. Quote Link to comment Share on other sites More sharing options...
John/Horace Posted March 30, 2020 Report Share Posted March 30, 2020 I knew someone would appreciate good backyard exhaust hacking. Cutting through the license plate rather than removing it, classic. Summer Solstice 1 Quote Link to comment Share on other sites More sharing options...
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