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New Exhaust

ironpaw

By ironpaw,
in Four Door Family & Wagoneers

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Old Gregg Enthusiast

Old Gregg

Posted
Posted

Could be the soot, but it may also be water in the resonator.

Unless he does really short trips continually I would have thought it would get too hot for water to condense in the resonator?

With just the hiflow cat (instead of the one in the dump and one in front pipe) should be finding it gets hotter further back in the exhaust system now.

Don't have a resonator in atm and is just 3" straight throught to original muffler and it is getting quieter so think the soot build up is most likely settling it down.

iamhe77 Grand Master

iamhe77

Posted
Posted

Unless he does really short trips continually I would have thought it would get too hot for water to condense in the resonator?

With just the hiflow cat (instead of the one in the dump and one in front pipe) should be finding it gets hotter further back in the exhaust system now.

Don't have a resonator in atm and is just 3" straight throught to original muffler and it is getting quieter so think the soot build up is most likely settling it down.

It is more due to the design of the Legalis (and the original Nismo for that matter).

You can see in the pic below that there is a resonator off to the right of the main pipe, this is the one I am referring to.

For some reason, it is quite normal for this to have some water in it after a bit of use (have even seen some guys state it is the reason they have put them up for sale on Yahoo - bit dramatic if you ask me)

FujitsuboLegalisR.jpg

Old Gregg Enthusiast

Old Gregg

Posted
Posted

It is more due to the design of the Legalis (and the original Nismo for that matter).

You can see in the pic below that there is a resonator off to the right of the main pipe, this is the one I am referring to.

For some reason, it is quite normal for this to have some water in it after a bit of use (have even seen some guys state it is the reason they have put them up for sale on Yahoo - bit dramatic if you ask me)

FujitsuboLegalisR.jpg

Have seen that weird little growth off the side before and have wondered how much it might help quieten the system.

Guess it would take a bit longer to heat this part up as the hot gas doesn't flow straight through it so would stay cool enough for water vapour to condense a bit longer than the rest.

Maybe they should put a drain plug in it!

Sunkist Grand Master

Sunkist

Posted
Posted

Have seen that weird little growth off the side before and have wondered how much it might help quieten the system.

Guess it would take a bit longer to heat this part up as the hot gas doesn't flow straight through it so would stay cool enough for water vapour to condense a bit longer than the rest.

Maybe they should put a drain plug in it!

apparently i read in another thread that it sends a pulse noise/signal, when it rebounds off the end, back to the exhaust cancelling out most of the sound(correct me if im wrong - iamhe im sure you will anyway) which could be possible. kinds of like in/out of phase or cross phase in audio i guess.

iamhe77 Grand Master

iamhe77

Posted
Posted

It helps to quieten it quite a bit (although I have not cut it off my Nismo to check - nor will I).

Here are a couple of clips I put up using a digi camera. As you can see/hear, neither are particularly loud.

Both have a very, very similar design although the pipe to the resonator is angled slightly differently and the rear muffler is completely different.

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Keep in mind the dump on this thing is massive, around 4 inches wide oval under the passengers feet. It will definitely sound different and slightly louder.

The drone at 2000 revs is a pain, very hard to get rid of. I cruise on 2500 now and don't hear it.

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