True Equal Length Headers?

[Epiphany]

You as well.

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[Voodooo]

You as well.

Are you in the market for long tube header?

 

[dbk]

Staying on topic, all I can say is that I was passed on a warning from those involved in the program, to not toss the exhaust dampers. A well engineered header for this application should entail similar design consideration.

Not only that, but you'd need to retune the damper for the equal lengths. At least that's what I'm told.

Where there is a will there is a way.

 

[krt22]

Yes indeed, you would not only be changing the free-vibration natural frequency, but the forced vibration conditions would also change due to the runner length differences.

 

[Voodooo]

The only thing is, your not going to fit a true equal length header on this car. There is no room!

 

[Epiphany]

Not only that, but you'd need to retune the damper for the equal lengths. At least that's what I'm told.

I could see NVH engineers choosing roughly the same damper locations were they handed the task of fitting full length headers into place, if for anything (and while probably not optimum) for clearance. What I'm curious about is whether the dampers might end up having even more mass than the stock ones.

 

[superman07]

no no no, any new dampeners would need to be completely engineered for the new system. no correlation would be close. density, weight, and location could vary wildly.

 

[Epiphany]

no no no, any new dampeners would need to be completely engineered for the new system.

Maybe I wasn't clear enough.

I understand that, yes, yes, and yes. I suggested that clearances may (this is all hypothetical, obviously) dictate location over an optimal location. I only wondered if the dampers would end up being larger (instead of smaller).

That is all.

 

[krt22]

no no no, any new dampeners would need to be completely engineered for the new system. no correlation would be close. density, weight, and location could vary wildly.

I wouldn't expect it to be wildly different. The over-all structure isnt going to change dramatically.

 

[superman07]

the material, construction, weight, and load points will all contribute to different frequencies and amplitude. A non scientific attachment of something could be an improvement but the only way to provide complete dampening would be to first measure the vibration of the new system, and create a proper tuned setup.

You could deaden certain frequencies and have more unpleasant peaks in others.

 

[flaps]

Guys I wouldn't waste my time trying to get equal length headers or the Ferrari sound. This chassis will not allow equal lengths unless you want a cobbled up cut and weld hack job for headers. The 5.2L's bigger bore and stroke and the fact that the engine is up front compared to Ferrari's rear engine/small displacement is really going to determine what type of sound you'll have. My experience thus far is these engines sound far better with an X-pipe though the tone is far deeper than any Ferrari you'll ever hear.

Nick

Ferrari does make a front engine V8 though.

[ame]

 

[Voodooo]

Ferrari does make a front engine V8 though.

That's correct but we're not drive a Ferrari and they are 2 totally different cars

 

[krt22]

the material, construction, weight, and load points will all contribute to different frequencies and amplitude. A non scientific attachment of something could be an improvement but the only way to provide complete dampening would be to first measure the vibration of the new system, and create a proper tuned setup.

You could deaden certain frequencies and have more unpleasant peaks in others.

Fully understood, my point was the frequencies likely wont see a huge shift. The materials will be very similar (minor shift if going from mild steel to SST), construction also very close (assuming they are shorties like DBK eluded to), weight will likely be in the same order of magnitude, and load points (constraints is a better word) are also largely the same, with the most important being the fixed constraint to the block. Eliminating the cats obviously would change things quite a bit. You could measure empirically as you suggested or you can do it via simulation. Really depends on what resources dbk has at his disposal

 

[superman07]

I am trying to see if my son can work this as a engineering project at school. When I told him I thought about using the ones from the cats on the off road tubes he told me to not bother.

 

[Voodooo]

Kris. I really think the dampers on the aftermarket exhaust are unnecessary

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