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I have a 2003 350z. I’ve combed thru the forums for this and have read several different things regarding solutions, but hoping for some feedback on my setup.
I run motordyne ART’s, custom fab’d 2.5” Y with flex joints and 3” outlet to rear, with 3” exotic speed exhaust off a G35
the custom fab’d Y was made shorter so that I could connect it to the G35 exhaust without having to cut the midpipe down, so there is no room on the Y to install a resonator (where I would prefer it)
my question is.. if I installed a resonator into the midpipe instead would it eliminate or at least reduce the rasp, or would it have little to no effect that far down the exhaust.
i appreciate any help, I spent days looking for an answer to this issue but coming up with nothing specific to what I’m thinking of doing
I have a 2003 350z. I’ve combed thru the forums for this and have read several different things regarding solutions, but hoping for some feedback on my setup.
I run motordyne ART’s, custom fab’d 2.5” Y with flex joints and 3” outlet to rear, with 3” exotic speed exhaust off a G35
the custom fab’d Y was made shorter so that I could connect it to the G35 exhaust without having to cut the midpipe down, so there is no room on the Y to install a resonator (where I would prefer it)
my question is.. if I installed a resonator into the midpipe instead would it eliminate or at least reduce the rasp, or would it have little to no effect that far down the exhaust.
i appreciate any help, I spent days looking for an answer to this issue but coming up with nothing specific to what I’m thinking of doing
. Have known of people who installed such with decent results.
You might flange it to the Y-pipe and mid-pipe and if sized properly, you can use the exhaust with the proper 8" EXTENSION for G. (G35 exhaust is longer, not shorter)
Try a Vibrant resonator. Have known of people who installed such with decent results.
You might flange it to the Y-pipe and mid-pipe and if sized properly, you can use the exhaust with the proper 8" EXTENSION for G. (G35 exhaust is longer, not shorter)
Yea it’s on a 350z so because the exhaust is longer there was no space for a resonator in the y pipe, which is why I’m wondering if I were to put a res post y pipe if it would still help
its not able to go right at the back of the y at the midpipe because of clearance at the cross member so I was wondering if I were to place it further down line if I would still see positive results or if I’m just wasting my money
Shouldn't matter where you put it in the stream, but the rasp is from lack of a cat so whether or not it will get rid of it who knows.
exactly the answer I was looking for, just didn’t want to waste the money putting it in the midpipe (as opposed to the Y) if it wasn’t going to make any sort of difference
Shouldn't matter where you put it in the stream, but the rasp is from lack of a cat so whether or not it will get rid of it who knows.
Originally Posted by Rabbit_
Yea it’s on a 350z so because the exhaust is longer there was no space for a resonator in the y pipe, which is why I’m wondering if I were to put a res post y pipe if it would still help
its not able to go right at the back of the y at the midpipe because of clearance at the cross member so I was wondering if I were to place it further down line if I would still see positive results or if I’m just wasting my money
Let's clear something up here. Rasp, by definition, is the uneven pulsing of exhaust frequencies banging into one another. Usually resulting from a freer flowing (and arguably, improperly designed) exhaust systems. So yes, DarkZ03 is correct in saying that test pipes and/or low restriction cats can lead to rasp.
But, pipes the size OP described also contribute to the increase in noise (rasp) due to their overall flow characteristics. A resonator's SOLE purpose is help remove the clatter and cross banging frequencies. Example: Look at a Nismo S-Tune exhaust as a great example. Big Y-pipe and an increased (3") mid-pipe. But yields zero rasp. The reason is simple: the midpipe has a resonator.
So yes, a resonator installed in line between the Y and rear muffler stands a 90% probability of cleaning up the sound. And, in the case of the Vibrant performance resonators, offers only enough restriction so as to tone down the exhaust by getting the exhaust pulses "synchronized" and without impeding flow in any appreciable amount.
Let's clear something up here. Rasp, by definition, is the uneven pulsing of exhaust frequencies banging into one another. Usually resulting from a freer flowing (and arguably, improperly designed) exhaust systems. So yes, DarkZ03 is correct in saying that test pipes and/or low restriction cats can lead to rasp.
But, pipes the size OP described also contribute to the increase in noise (rasp) due to their overall flow characteristics. A resonator's SOLE purpose is help remove the clatter and cross banging frequencies. Example: Look at a Nismo S-Tune exhaust as a great example. Big Y-pipe and an increased (3") mid-pipe. But yields zero rasp. The reason is simple: the midpipe has a resonator.
So yes, a resonator installed in line between the Y and rear muffler stands a 90% probability of cleaning up the sound. And, in the case of the Vibrant performance resonators, offers only enough restriction so as to tone down the exhaust by getting the exhaust pulses "synchronized" and without impeding flow in any appreciable amount.
wow thank you for that detailed response man that really helps a lot, i appreciate it!
As long as you're not waiting on a pizza delivery that has been impeded by Leon in his yellow Skyline, I think this is fair game.
(Yes, Mic. This is a reference you will not get )
A reference to my advanced age? Well, sort of advanced. Young at heart and body. Fast & Furious.
My wife thinks (rightly most times) that I am LOADED with useless facts, lacking depth. Know little about a lot, not a lot about a little. Laff! (Other than a few things that I'm deep into.)
A reference to my advanced age? Well, sort of advanced. Young at heart and body. Fast & Furious.
My wife thinks (rightly most times) that I am LOADED with useless facts, lacking depth. Know little about a lot, not a lot about a little. Laff! (Other than a few things that I'm deep into.)
if I installed a resonator into the midpipe instead would it eliminate or at least reduce the rasp, or would it have little to no effect that far down the exhaust.
Adding to Mic's excellent guidance, I was able to eliminate rasp using ART pipes (2.5") into a chopped up ebay y-pipe, where each 2.5" combines at a Vibrant 1111 (dual 2.5" inlet, single 3" outlet), then exits to 3" piping with 2x of the 1142 that Mic linked, and finally exits at another 1111 (this time reverse, single 3" inlet to dual 2.5" tips).
Rasp solution
