Chad W Posted April 19, 2011 Share Posted April 19, 2011 I do have the smooth bend, but it's a turbo. Updated my sig. Link to comment Share on other sites More sharing options...
milesej05 Posted April 20, 2011 Share Posted April 20, 2011 Alright, I might give that a try after another tank of gas or so depending what my fuel consumption is like. Link to comment Share on other sites More sharing options...
Mistertribal Posted July 29, 2011 Share Posted July 29, 2011 Just did it, no cel or nothing and I didn't notice any sound difference or wooshh at all so I put it back in there. Link to comment Share on other sites More sharing options...
bmx045 Posted September 23, 2011 Share Posted September 23, 2011 I removed the silencer and was told avidly by my dyno tuner to keep it on, it serves a purpose and has an effect on the maf readings. He then referred me to a study done with/without the silencer on the dyno....and here it is....read it. http://www.iwsti.com/forums/power-bragging/207168-2011-subaru-sti-baseline-pulls-initial-mods-custom-dyno-tuning.html Link to comment Share on other sites More sharing options...
thestratomaster Posted September 23, 2011 Share Posted September 23, 2011 impreza silencers are much different than legacies, at least the older ones. I trust innovative though, they've done work for me before Link to comment Share on other sites More sharing options...
Brunex Posted February 9, 2012 Share Posted February 9, 2012 Removed mine tonight and it seemed fine, then I covered the hole with a plastic cup and the engine started running rich. Bad luck for me cuz the check engine light came on (solid) and the cruise control light (blinking). I just put everything back and the engine is running back to normal but the check engine and cruise light are still on. Hope it goes away tomorrow morning. Link to comment Share on other sites More sharing options...
thestratomaster Posted February 9, 2012 Share Posted February 9, 2012 you'll have to clear the code for it to go away as far as I know Link to comment Share on other sites More sharing options...
Brunex Posted February 10, 2012 Share Posted February 10, 2012 Yep, So this morning the CEL was still on. So I went to Advance autoparts to get the scanner, when I plugged it in the scanner would give no code at all. That was weird. Well anyways I held down the erase key and erased it despite there was no code displayed. After that I started the engine and started to low the rpm at idle so low that the engine almost stalled but then it stabilized. Still the engine felt rich, after some minutes I opened the filter box while the engine running. Looks like it sucked a good bunch of air and stabilized again. Now it running as it used to. So... my recommendation is DO NOT REMOVE THE INTAKE SILENCER AND TAP THE HOLE. Maybe remove it and leave the hole open. Link to comment Share on other sites More sharing options...
Mega Users seabass07 Posted February 10, 2012 Mega Users Share Posted February 10, 2012 When I removed mine and left the hole opened, I logged it and got IAT's significantly higher. There was noticeably less power and more noise. So, it went right back in! Link to comment Share on other sites More sharing options...
thestratomaster Posted February 10, 2012 Share Posted February 10, 2012 Yep, So this morning the CEL was still on. So I went to Advance autoparts to get the scanner, when I plugged it in the scanner would give no code at all. That was weird. Well anyways I held down the erase key and erased it despite there was no code displayed. After that I started the engine and started to low the rpm at idle so low that the engine almost stalled but then it stabilized. Still the engine felt rich, after some minutes I opened the filter box while the engine running. Looks like it sucked a good bunch of air and stabilized again. Now it running as it used to. So... my recommendation is DO NOT REMOVE THE INTAKE SILENCER AND TAP THE HOLE. Maybe remove it and leave the hole open. that usually happens when you clear codes. . . Link to comment Share on other sites More sharing options...
bmx045 Posted February 10, 2012 Share Posted February 10, 2012 It resets the learned values in the ecu, including idle control, so it will dip real low for a little while then normalize. Link to comment Share on other sites More sharing options...
COmtnBiker Posted April 26, 2012 Author Share Posted April 26, 2012 I just looked at the original post and noticed a lot of red x's. That is fixed now for anyone who wants to continue using this walk-through. Have fun! 2012 Xterra Pro-4X 2003 Outback Sedan Limited D.U.S.T.O.F.F. "Dedicated Unhesitating Service To Our Fighting Forces" Link to comment Share on other sites More sharing options...
fishbone Posted June 13, 2012 Share Posted June 13, 2012 I just wanted to say I've had my silencer removed and the hole open for over 2 years now and never had an issue. I can't say I've monitored IATs closely but I see no evidence of any increase. When I am cruising the difference from ambient is about 5 degrees or less, depending on weather. In traffic, it all depends on how long I have stopped for. Affecting the MAF makes no sense since it is located behind the panel filter, therefore readings should be the same given the same location and piping diameter. I had mine capped at one time and to be honest the only reason I took it out is because I was told it would flow somewhat better. The reason I even posted here is because I've started wondering if I should cap it after all. It does get hot in the engine bay. However, given the fact that when moving, air is being sucked from the front, I think high IATs may be an issue only when stopped in traffic, etc. I am interested though in hearing if anyone has seen anything different regarding IATs etc. Link to comment Share on other sites More sharing options...
Mega Users seabass07 Posted June 13, 2012 Mega Users Share Posted June 13, 2012 Mine were crazy high. It was also very hot when I tested it. Probably around 90F. I had a noticeable loss in power from it sucking hot air. Link to comment Share on other sites More sharing options...
bmx045 Posted June 13, 2012 Share Posted June 13, 2012 my trims went wack when removing the placenta and leaving the hole open. Link to comment Share on other sites More sharing options...
Mega Users seabass07 Posted June 13, 2012 Mega Users Share Posted June 13, 2012 my trims went wack when removing the placenta and leaving the hole open. Quoted because...waaaaaaaat? Link to comment Share on other sites More sharing options...
bmx045 Posted June 13, 2012 Share Posted June 13, 2012 from what i can gather, leaving the placenta hole open as well as having the stock intake hole leaves two entrances for air thus maybe causing turbulence? either way, my trims didn't like it. Link to comment Share on other sites More sharing options...
Mega Users seabass07 Posted June 13, 2012 Mega Users Share Posted June 13, 2012 The placenta hole is the thing you're having so much trouble getting. Link to comment Share on other sites More sharing options...
bmx045 Posted June 13, 2012 Share Posted June 13, 2012 the placenta is the box, the hole is the void left when the placenta is gone. Link to comment Share on other sites More sharing options...
fishbone Posted June 13, 2012 Share Posted June 13, 2012 I currently have some trims issues as well as random phantom fbkc/flkc going on in addition to the MAF occasionally not "settling", meaning fluctuating readings under dead constant throttle on straight road. If it were going bad it would show other signs. I am throwing the jug back on for diagnistics purposes and will see what impact it had. Either way I was working under the car just the other day and when I saw the big gaping hole facing the hot engine bay it made me rethink the wisdom of leaving it open like that. Link to comment Share on other sites More sharing options...
bmx045 Posted June 13, 2012 Share Posted June 13, 2012 turbulence causes maf fluctuations. Link to comment Share on other sites More sharing options...
fishbone Posted June 13, 2012 Share Posted June 13, 2012 Which, again, in my admittedly limited knowledge, I am surprised that would be an issue since the paper filter ought to normalize those wild fluctuations, no? Link to comment Share on other sites More sharing options...
bmx045 Posted June 13, 2012 Share Posted June 13, 2012 not really, not sure if you noticed but on some intakes that use cone filters, like the AEM, the intake tube has lateral slats right before the maf to direct the air and reduce turbulent swirling. and this is with a cone filter that presumably has equal flow in from 360*, opposed to the air box that would have 2 openings- the placentectomy and intake duct hole. I think with 2 orifices, the air intersects like an intersection without traffic lights and causes some type of weird interaction/swirl/collision with the air. I'm not sure if the stock filter, or really any panel filter, does anything to direct air in an orderly fashion. http://t0.gstatic.com/images?q=tbn:ANd9GcSauLPzjk6xKXwtmBB6vVYjaeRmEFQSqVne0rm9ooq_TGc-S81SOEUmfQh2 Link to comment Share on other sites More sharing options...
fishbone Posted June 13, 2012 Share Posted June 13, 2012 Well I guess at the very least I will do what my old man must have said to my mom some years ago. I will tap that hole. Or stuff. Whatever. Link to comment Share on other sites More sharing options...
Darksabre Posted June 14, 2012 Share Posted June 14, 2012 ^Awwwwkward. Link to comment Share on other sites More sharing options...
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