Quieting A Really Loud Exhaust For State Inspection
#1
Quieting A Really Loud Exhaust For State Inspection
Alright so my friend has a 98 Maxima SE w/ a Warpspeed exhaust, y-pipe and custom test pipe- all cats eliminated. This set-up is loud enough to the point he can not pass the state inspection. He threw away all stock equipment so his only option is to add some kinda baffle to the exhaust to quiet it down, just long enough to pass inspection! Well, we decided to get this muffler insert (see pic below) and it works very well at quieting the exhaust, however, it's not enough to quiet it to "near stock" levels, so I was wondering, would it help to insert TWO of these silencers into the muffler? I did the measurements and two can fit perfectly fine (back-to-back), but I just wanna make sure we're not causing any problems by creating excessive backpressure and also, if there's any extra benefit of having TWO of these things in there instead of just one. Any advice appreciated, thanks a bunch guys!!
#7
Haha ricer crap eh? All we care is that it's enough to quiet the exhaust for a few minutes to pass inspection, it will be removed immediately afterwards. The muffler option isn't do-able as price, fitment issues, installation, removal and effectiveness are all questionable. We just need to consipate the living hell outta this muffler so it's just quiet enough to pass.
#9
Haha ricer crap eh? All we care is that it's enough to quiet the exhaust for a few minutes to pass inspection, it will be removed immediately afterwards. The muffler option isn't do-able as price, fitment issues, installation, removal and effectiveness are all questionable. We just need to consipate the living hell outta this muffler so it's just quiet enough to pass.
#10
#11
just to answer the qustion you can use 2 of these to quite down the exast but you should drill holes in the outer one the one you woud see if you were looking into the tip of the exhaust. then it should work. you might want to weld them together also because its gonna be a ***** to get the inner one out. if you really want to quite it down you can but some high temp insolation between them and it will act as a sound dedener
#12
How bad is your inspection there? I have a wsp y, hi flow cat, no resonator, and a straight thru muffler and it's LOUD but they dont have a problem with it. What state is this? And if the car is that loud your friend should invest in an electronic actuated silencer. When you see a cop you flip the switch and the thing closes to a set point and you have a stock sounding car. I believe apexi ??? has them, dont quote me but thats where i remember seeing it.
#13
just to answer the qustion you can use 2 of these to quite down the exast but you should drill holes in the outer one the one you woud see if you were looking into the tip of the exhaust. then it should work. you might want to weld them together also because its gonna be a ***** to get the inner one out. if you really want to quite it down you can but some high temp insolation between them and it will act as a sound dedener
I found a "spray-on" sound dampener insulation:
http://store.summitracing.com/partde...5&autoview=sku
I figure I could spray this on both of the baffles to really insure it quiets down. Ya think that stuff does what it says it does?
#14
How bad is your inspection there? I have a wsp y, hi flow cat, no resonator, and a straight thru muffler and it's LOUD but they dont have a problem with it. What state is this? And if the car is that loud your friend should invest in an electronic actuated silencer. When you see a cop you flip the switch and the thing closes to a set point and you have a stock sounding car. I believe apexi ??? has them, dont quote me but thats where i remember seeing it.
#15
drilling holes and spraying on sound dampening is not going to deaden it enough. If they are that strict they won't pass it. I would just put the stock muffler on and have the car tested and keep it or whatever. Also if the car is running long enough, without the cats it should still pass. I believe. It may be different in MA but plenty of guys here in CT pass as long as the car has been running.
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