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Need advice on VE SS exhaust fix

Not_An_Abba_Fan

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It will probably make it louder, not sure on the quality of the note though, may end up raspy and drony though as the rear resonator is pretty small on X Force.
 

Nurb

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It will probably make it louder, not sure on the quality of the note though, may end up raspy and drony though as the rear resonator is pretty small on X Force.

I have a stock cam l76 wagon. Has pacemacker 4 into 1 00 cell cats. Twin 3 inch x force system that has been turned into a bitsa. Has magnaflow resonators that have replaced x force resenators, have j pipes on the rear with resonators. It sounds good high rpm and low rpm but is too dull and smooth around 1500-2500 rpm. Would replacing the x merge pipe with a h pipe make a better note?

You seem like the most informed on exhausts here so i thought id ask you. I want a deeper more chopped out note if that makes sense.
 

Not_An_Abba_Fan

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That would be the ideal setup if it is "dull and smooth" between 1500-2500rpm. That's where you do most of your driving so you don't want it loud and drony around there. IMO, don't touch it.

To answer the X pipe question, it will change the note, make it more refined, possibly louder.
 

Nurb

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That would be the ideal setup if it is "dull and smooth" between 1500-2500rpm. That's where you do most of your driving so you don't want it loud and drony around there. IMO, don't touch it.

To answer the X pipe question, it will change the note, make it more refined, possibly louder.


I had a H pipe fitted where the x force x pipe was. Wow what a difference. Has a angry bark to it now really deep. Sounds awesome. Almost like a merc amg 63 or something.
 

Mr VF2

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H-Pipe: Uses the Hemholtz resonator theory. The H pipe's ratio to the exhaust pipe will cancel out a particular frequency, when done properly it will reduce and in some cases, eliminate drone. The sound from an exhaust is more refined using the H pipe as you have each banks' pulses travelling for the most part independently from each other. On a V8, this gives you 4 pulses in each side. Sounds good.

X-Pipe: There are variations of the X pipe that aren't true X pipes, there are kiss pipes and merge pipes that look like an X but aren't. A true X pipe will be a definite X that does not change pipe size throughout the whole X. Magna Flow make one. A Kiss pipe is basically two bends that touch with hole cut out where they meet. This is a "cheat" version of the H, better than a merge but not really effective in tuning out frequencies. It will have a small effect. The other type is a merge, these are bad for flow as they are similar to a kiss but have a much larger contact area, this reduces the diameter of the exhaust where they meet. Very restrictive. Now the true X is the best of all 3 as it does not reduce in diameter. The effectiveness of an X depends entirely on where you put it, the theory of an X pipe is to create a low pressure area behind the exhaust pulse when it crosses over into the opposite side and this aids in speeding up the pulse behind it and results in a scavenging effect. Positioning is vital depending on what the desired outcome is. Too close to the engine in high performance applications and it will actually reduce flow as the revs get up (high revs result in pulses that are close together and will cause pulses to crash into each other at the X) Further back and it will act as it should. In street driven or low to mid requirements (IE track work) too far back and it will pretty much do the same as the exhaust pulses are slower and further apart, they will also cool faster and "bank up" at the X. Sound wise, all X type merges tend to muddle the note as they combine all 8 pulses into each pipe because they are open to the flow from each header pipe.

Hey naaf, I’ve noticed with the manta ‘quiet’ exhaust they put the H-pipe behind the front muffler. Everything I can find on the net suggests it should be put before the front muffler. What’s your thoughts?
 
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