camaro.hair Posted December 19, 2008 Share Posted December 19, 2008 What's interesting is that this noise definitely was not there prior. I have 36K miles, and took it off for about 4 hours before replacing, so I have a good reference of what it was like prior. It's been replaced for almost a month now, and it has not changed. could i have knocked something loose? Link to comment Share on other sites More sharing options...
Pricci09 Posted December 19, 2008 Author Share Posted December 19, 2008 did you replace your air filter with a high flow unit? Link to comment Share on other sites More sharing options...
ArcTec34 Posted December 20, 2008 Share Posted December 20, 2008 just put mine back on, had it off for a couple months, now that i think about it, I'm pretty sure the car felt a little funny after I removed it does it do anything to reset the ECU learning now that I've put it back after three months of driving without it? Link to comment Share on other sites More sharing options...
Bolksey85 Posted December 20, 2008 Share Posted December 20, 2008 It didn't seem to take more than a day or 2 for my car to return to it's old self after putting mine back in. Link to comment Share on other sites More sharing options...
snow05gtRI Posted December 21, 2008 Share Posted December 21, 2008 What's interesting is that this noise definitely was not there prior. I have 36K miles, and took it off for about 4 hours before replacing, so I have a good reference of what it was like prior. It's been replaced for almost a month now, and it has not changed. could i have knocked something loose? you probably just actually notice it now because you heard it. now you know when to listen for it and do it unintentionally Link to comment Share on other sites More sharing options...
RShaw Posted December 23, 2008 Share Posted December 23, 2008 Im not an expert at air intakes, but i think you guys are all blowing this silly silencer thing out of proportion. Every Subaru i have ever sat in has a funny, constantly fluctuating idle. This can not be blamed on the intake silencer. Also there is no way your gas mileage increased by 3mpg from reinstalling the silencer. This change in mileage was probably due to a change in driving habits. If removing this simple jug from the bottom of your air box causes all these problems, then wouldnt a high flow filter be the worst thing you could possibly do? Link to comment Share on other sites More sharing options...
ArcTec34 Posted December 23, 2008 Share Posted December 23, 2008 simple answer: no. Link to comment Share on other sites More sharing options...
firepyro515 Posted December 23, 2008 Share Posted December 23, 2008 Im not an expert at air intakes, but i think you guys are all blowing this silly silencer thing out of proportion. Every Subaru i have ever sat in has a funny, constantly fluctuating idle. This can not be blamed on the intake silencer. Also there is no way your gas mileage increased by 3mpg from reinstalling the silencer. This change in mileage was probably due to a change in driving habits. If removing this simple jug from the bottom of your air box causes all these problems, then wouldnt a high flow filter be the worst thing you could possibly do? enough said everyone has different experiences when they remove their intake silencers, plain and simple Link to comment Share on other sites More sharing options...
Prowler504 Posted December 24, 2008 Share Posted December 24, 2008 I have had mine removed since July and haven't had any issues. Link to comment Share on other sites More sharing options...
trademark Posted December 24, 2008 Share Posted December 24, 2008 I have had mine removed since July and haven't had any issues. Same here Link to comment Share on other sites More sharing options...
kjiz Posted December 24, 2008 Share Posted December 24, 2008 I recieved a CEL but it was like a couple months after the fact. The code disappeared before I could check what it was for. I just threw the silencer back in anyway because I hated the civic sounding intake more than I loved the woosh sound. Link to comment Share on other sites More sharing options...
trademark Posted December 24, 2008 Share Posted December 24, 2008 I recieved a CEL but it was like a couple months after the fact. The code disappeared before I could check what it was for. I just threw the silencer back in anyway because I hated the civic sounding intake more than I loved the woosh sound. IMO I don't think anything about our motors sound "Civic" at all.. Link to comment Share on other sites More sharing options...
rtbrjason Posted December 24, 2008 Share Posted December 24, 2008 I have had mine removed since July and haven't had any issues. You don't think you're having any problems. Do some data logging and you'll see your MAF oscillating. Also google "helmholtz resonator" for a lot of interesting information. Link to comment Share on other sites More sharing options...
trademark Posted December 25, 2008 Share Posted December 25, 2008 You don't think you're having any problems. Do some data logging and you'll see your MAF oscillating. Also google "helmholtz resonator" for a lot of interesting information. why does taking off the jug make the MAF oscillate? I wouldn't think it wouldn't affect the MAF since the air still has to get through the filter.. sounds like it would become a serious detriment for the car but I haven't ever heard of it with any other vehicle that I've toyed with.. the helmholtz resonator information is interesting but really doesn't say anything about how it is benificial to the vehicle in any other way than changing the intake tone. please explain how this is relative to the oscillating MAF? I think you need to clean your MAF maybe..? Link to comment Share on other sites More sharing options...
ArcTec34 Posted December 25, 2008 Share Posted December 25, 2008 obviously you didnt read any good articles or read them well, because they affect a lot more than "intake tone" Link to comment Share on other sites More sharing options...
trademark Posted December 25, 2008 Share Posted December 25, 2008 obviously you didnt read any good articles or read them well, because they affect a lot more than "intake tone" whateve merry christmas Link to comment Share on other sites More sharing options...
ArcTec34 Posted December 26, 2008 Share Posted December 26, 2008 true, merry christmas =) Link to comment Share on other sites More sharing options...
jcjentz71 Posted March 30, 2009 Share Posted March 30, 2009 wonder if i could suck up rain water with the hole exposed that connects the silencer to the airbox? got rid of my aem cai because of this.. any comments ?? anyone driven in a downpour with the silencer off? Link to comment Share on other sites More sharing options...
trademark Posted March 30, 2009 Share Posted March 30, 2009 wonder if i could suck up rain water with the hole exposed that connects the silencer to the airbox? got rid of my aem cai because of this.. any comments ?? anyone driven in a downpour with the silencer off? if you look at the design of our stock setup with the air duct that is routed to the front of the hood you would acually pick up more water in a downpour through that than I think would come up and into the 3 inch hole.... I live in seattle and I have yet to "suck up" any rain water at all.. Link to comment Share on other sites More sharing options...
HarryN Posted May 13, 2009 Share Posted May 13, 2009 I still do not see any evidence that removing the silencer from the airbox causes issues. The results are too sporadic. Some say nothing went wrong, some say they have issues. If you look at it scientifically, you can't really say removing the silencer from the airbox WILL cause issues. May cause issues, probably. I am still not understanding how removing a silencer is causing these issues. Are people making sure they did not damage their MAF? Reconnected the MAF properly? How badly are people man-handling the air box while getting to the silencer? I am not calling BS on anyone having issues, this is more on my end on trying to understand the situation. I will still be performing this mod regardless and see what happens. From what I see, nothing will happen aside from more noise. For the guy that says it sounded too rice or like a Honda, you know we have Boxer engines, right? Our engines sound much nicer than those buzzsaw grocery runners. Link to comment Share on other sites More sharing options...
ConeEluder Posted May 16, 2009 Share Posted May 16, 2009 I still do not see any evidence that removing the silencer from the airbox causes issues. I didn't believe it either, until I read this from MickeyD, a very respectable tuner: "The silencer is a different issue. Taking out the silencer can cause MAF oscillations at 2500-2700 rpm in 5th gear under full boost. This is only an issue with small turbos such as the VF40 because large turbos can't build enough boost in this rpm range to make it a problem." Now, given this is with a Stage II map - it still shows that the silencer DOES have an affect on the performance of the engine. I'm throwing my silencer back in when I go Stage II today... Link to comment Share on other sites More sharing options...
Max Capacity Posted May 17, 2009 Share Posted May 17, 2009 "so if you turbo or supercharge the engine then you may as well get rid of it." got that from the second post in the Soarer link. My son removed mine back in July 04. I have been at AP stage 1 93 octane since Dec 04, 99,000 miles ago. Just had Tuning Alliance reflash and data log last Saturday. Mike said everything looks good. I have been getting as much as 27+ mpg at 68mph, for short periods the dash well show just over 30mpg. I have been driving it pretty hard the past week. Last night filled the tank. Did a few full boost pull's through the gears, in about 10 miles, mileage showed 21.2 this morning before a 80 mile round trip on the highway at 68mph. got home, the dash showed 24.6 mpg. 107,000 miles on the engine. 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...
HarryN Posted May 17, 2009 Share Posted May 17, 2009 I didn't believe it either, until I read this from MickeyD, a very respectable tuner: "The silencer is a different issue. Taking out the silencer can cause MAF oscillations at 2500-2700 rpm in 5th gear under full boost. This is only an issue with small turbos such as the VF40 because large turbos can't build enough boost in this rpm range to make it a problem." Now, given this is with a Stage II map - it still shows that the silencer DOES have an affect on the performance of the engine. I'm throwing my silencer back in when I go Stage II today... But I have an '09 LGT. It has the VF52 turbo, correct? So then this should not be an issue, according to the statement? Link to comment Share on other sites More sharing options...
rtbrjason Posted May 17, 2009 Share Posted May 17, 2009 But I have an '09 LGT. It has the VF52 turbo, correct? So then this should not be an issue, according to the statement? It has a vf46, and the boost oscillation should only be an issue at low rpm in 5th gear if you've tuned your car. I don't think it's an issue with stock boost. Link to comment Share on other sites More sharing options...
HarryN Posted May 18, 2009 Share Posted May 18, 2009 Alright, so I am good to go then! In 5th gear, I am usually at 2500 to 3000 RPM. So the oscillation should not be an issue, unless 2500 to 3000 rpm is considered "low". Link to comment Share on other sites More sharing options...
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