TwinTurbo510 Posted July 6, 2018 Share Posted July 6, 2018 Hi guys - this might be a weird question, but has anyone tried for having a lot of power with near-stock sound levels? -Dave Link to comment Share on other sites More sharing options...
Holla Posted July 6, 2018 Share Posted July 6, 2018 Stick with the oem mufflers and it will stay pretty quiet. Link to comment Share on other sites More sharing options...
700watts Posted July 6, 2018 Share Posted July 6, 2018 It can be done as I did it... just keep the stock cans Link to comment Share on other sites More sharing options...
bigBADbenny Posted July 6, 2018 Share Posted July 6, 2018 Ime, a 3” turbo back on stock muffs is good for low down torque... I went for GR sedan quads modded for BP... for a bit extra... If you want to quieten straight-through muffs, a mufflered (baffled) midpipe is one option. EL headers are another option, they quieten the boxer throb somewhat Then there’s various mufflers with harmonic canceling, google “sidebranch resonator” for eg. Link to comment Share on other sites More sharing options...
TwinTurbo510 Posted July 6, 2018 Author Share Posted July 6, 2018 Thanks. Maybe another way to ask is at what horsepower level does it become advisable to change to higher flowing mufflers? Will they flow to 400whp? Link to comment Share on other sites More sharing options...
TwinTurbo510 Posted July 6, 2018 Author Share Posted July 6, 2018 BTW thanks for the sidebranch resonator tip (pun intended), clearly I haven’t been keeping up with some car trends and technology...and being a Nissan guy I’ll need to learn the Subie lingo. At least I knew what elh meant. . Link to comment Share on other sites More sharing options...
utc_pyro Posted July 6, 2018 Share Posted July 6, 2018 My car is in the 280-300whp range, and only picked up 5 g/sec going from the stock catback to a 3" setup. That's less than a 2% more airflow. Worst case at 400whp you might have a 3-4% power loss with the stock catback vs a higher flow one. Link to comment Share on other sites More sharing options...
gkinslow Posted July 6, 2018 Share Posted July 6, 2018 Hi guys - this might be a weird question, but has anyone tried for having a lot of power with near-stock sound levels? -Dave All depends on your perception of "a lot of power" I made 452awhp and consider my car on the loud side. (Grimspeed 3" DP to 3" HKS silent power TBE.) My tuner remarked that it felt more like 500whp because it is so "quiet". Point is both are quite subjective. YouTube sound clips are somewhat helpful. These are also interesting. https://www.xforceusa.com/products/varex-mufflers Link to comment Share on other sites More sharing options...
JmP6889928 Posted July 6, 2018 Share Posted July 6, 2018 I'm running all forged and 292 whp and running the stock cans. It sounds great, pulls like a hero, and causes no fatigue on long trips. Long live quiet. Link to comment Share on other sites More sharing options...
700watts Posted July 6, 2018 Share Posted July 6, 2018 I'm making just south of 400 like 392 or something (on a hot day) with the stock cans. No need to be loud ... Link to comment Share on other sites More sharing options...
700watts Posted July 6, 2018 Share Posted July 6, 2018 I'm running all forged and 292 whp and running the stock cans. It sounds great, pulls like a hero, and causes no fatigue on long trips. Long live quiet. I'm all forged as well, you can and should be making more than that. Fueling low? Link to comment Share on other sites More sharing options...
TwinTurbo510 Posted July 6, 2018 Author Share Posted July 6, 2018 Thanks. Yeah "big power" can mean many things, in this case 400whp works even though it's not insane power. At ~400hp I'll trade 3-4% power loss for a quiet car. Silent (close to stock) and fast, that's the goal. Thanks again. Link to comment Share on other sites More sharing options...
JmP6889928 Posted July 7, 2018 Share Posted July 7, 2018 I'm all forged as well, you can and should be making more than that. Fueling low? Nope. Just running a Custom VF40 (basically built out of leftover parts I had laying around) and 650 injectors with Brian Crower 272 cams. Wanted stone reliable versus big horsepower. Link to comment Share on other sites More sharing options...
700watts Posted July 7, 2018 Share Posted July 7, 2018 Nope. Just running a Custom VF40 (basically built out of leftover parts I had laying around) and 650 injectors with Brian Crower 272 cams. Wanted stone reliable versus big horsepower. Just seems like you're leaving quite a bit on the table.... Link to comment Share on other sites More sharing options...
JmP6889928 Posted July 9, 2018 Share Posted July 9, 2018 Just seems like you're leaving quite a bit on the table.... I built it as I wanted it to be. I know it will handle 600 whp on the bottom end, but I don't need or want that kind of horsepower for this car. I have a stupid Mustang that is at 358 whp right now, and I basically only ever use it on the track. Link to comment Share on other sites More sharing options...
tocinoman25 Posted July 9, 2018 Share Posted July 9, 2018 Do the stock mufflers bolt up to the invidia q300 y pipe by chance? Sent from my SM-G960U using Tapatalk Follow me on IG @chefodiycarguy and @chefo.soriano Link to comment Share on other sites More sharing options...
Max Capacity Posted July 9, 2018 Share Posted July 9, 2018 Do the stock mufflers bolt up to the invidia q300 y pipe by chance? Sent from my SM-G960U using Tapatalk No, they do not. Here's a Q300 muffler next to a magnaflow knock off. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
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