Babyjuice Posted August 2, 2011 Report Share Posted August 2, 2011 just got a new muffler installed on my 03 v10 and moved the exhuast forward and added a 6" tip...the muffler is a custom designed muffler from mufflerman in O.C. I got it done today and it seems like I'm getting worse gas mileage then before(I had a gibson catback performance muffler)..could it be that the muffler isn't giving the engine the right back pressure? Or does it take a little bit for the engine to get used to a new muffler? Also it kind of smells weird..but idk if its because of the new muffler? And suggestions on what it could be? Quote BABYJUICE Link to comment Share on other sites More sharing options...
Babyjuice Posted August 2, 2011 Author Report Share Posted August 2, 2011 Bump Quote BABYJUICE Link to comment Share on other sites More sharing options...
bassrace Posted August 2, 2011 Report Share Posted August 2, 2011 I Dont think the engine will get used to it, if its not right call the company and tell them Quote 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
Ecco Posted August 2, 2011 Report Share Posted August 2, 2011 I think it's the muffler. I have a feeling that it doesn't need to 'get used to it'. I guess see if it has gotten better, or else call the manufacturer and let them know. also, see if it's a common occurrence.. Quote Link to comment Share on other sites More sharing options...
OrionStang Posted August 2, 2011 Report Share Posted August 2, 2011 If the exhaust was 'custom' made, tell the builder about the issues you're having and that the design may need to be adjusted. What size is the piping from the exhaust manifold to this 6" tip? Quote SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
Skullz Posted August 2, 2011 Report Share Posted August 2, 2011 Are the O2 sensor's connected? Changing mufflers will usually have little impact on gas mileage but if other changes were made like removing the cat from the system than there is you problem. Quote 01 Ford focus ZX3 Pioneer AVH-X491BHS PPI PC 4800.2 Morel Maximo 6.5" x2 Link to comment Share on other sites More sharing options...
OrionStang Posted August 2, 2011 Report Share Posted August 2, 2011 I did some reading on a Ram forum and it seems these motors do like some back pressure. Most issues were power related, so I don't know about mileage. But most of these guys, even with engine mods, are running only 2.5-3" pipes back to 4" tips. So, pipe diameter could be it, or O2's like Skullz suggested. Quote SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
Tarball Posted August 2, 2011 Report Share Posted August 2, 2011 Are the O2 sensor's connected? Changing mufflers will usually have little impact on gas mileage but if other changes were made like removing the cat from the system than there is you problem. This could be a potential area to look into. Quote CURRENT SYSTEM: Alternator: Stock alt on mids/highs Isolated DC Power 270 SP - Charging @ 16.8v Batteries: (2) XS D1400s Power Cable: Double Runs of 1/0 KNU Kolossus Fleks Headunit: 80-PRS Sub Amp: DC 5.0k Subwoofers: 2 RE MT 15s /PSI dual .7ohm recones Subwoofer Enclosure: 9.1cubes @ 32hz - brutal. Mids & Highs Amp: CT125.4 Active Components: Mids RE XXX 6.5c Highs - 3 RE XXX tweeters per side(A pillar) Noise Control: Damplifier Pro all over the cab. Build Log If you do business with me please leave feedback here: FEEDBACK THREAD Highest Legal Score: 151.0 db Highest Musical 30 Second Average: 151.6 db Link to comment Share on other sites More sharing options...
Babyjuice Posted August 2, 2011 Author Report Share Posted August 2, 2011 Its 3.5 inch piping...and the cat wasn't removed either...its a high flow muffler. It goes headers to cat 2" piping to muffler to 1.5' to tip Quote BABYJUICE Link to comment Share on other sites More sharing options...
Babyjuice Posted August 2, 2011 Author Report Share Posted August 2, 2011 Its a Ford f250 Quote BABYJUICE Link to comment Share on other sites More sharing options...
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