2019 Challenger Widebooty HellKitty (she's giving me the meatsweats...)
- Thread starter motorheadmike
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In general terms, as I understand it, high carbon stainless steel typically is about 2.5 times heavier than aluminum. So the math is there - I'll try to weigh both systems for science (but, chances are I won't 😉)
Material density is another consideration as it relates to resonant frequency and sound absorption/transmission. Again, my understanding, is that aluminum will absorb more sound (act less like a high frequency tuning fork) than steel... resulting in a softer less tinny tone both through the wall and out the tail pipe.
Grab a coffee and a some LSD:
Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell
The maximizing of sound transmission loss (TL) across a functionally graded material (FGM) cylindrical shell has been conducted using a genetic algorithm (GA). To prevent the softening effect from occurring due to optimization, the objective function is modified based on the first resonant...
www.hindawi.com
And here's a little something about noise absorption using perforated materials... which are enhanced with a packing material or the like:
Perforated Metal Sound Absorbing Panels | Kinetics KNP - Kinetics Noise Control | Manufacturer
Highly durable perforated metal sound absorbing panels. Ideal solution to airborne noise problems in demanding environments.
kineticsnoise.com
So, when I was in the field (low voltage residential construction management), as a tech, I had a couple of sayings I used to throw around: "everything works on paper" and "Engineering hands out square wheels. I pound out the corners so it actually rolls." Now, I hand out the square wheels. In the garage, you have the luxury of rounding the corners as you go.
This car does a lot of that in first and second.
Anecdotal evidence:
site:yellowbullet.com aluminum exhaust at DuckDuckGo
DuckDuckGo. Privacy, Simplified.
duckduckgo.com
Tips showed up... at 4.4kg they weigh almost as much as the whole rest of the exhaust.
Yeah, I am thinking of making a set now. Sigh.
Yeah, I am thinking of making a set now. Sigh.
If they were half the weight, how were you planning to mate those to the pipe?
2 weeks later:
YAAAAY WEIGHT SAVINGS!!!!!!
Oh, I am still using them. Going to weld a length of 3" pipe to the back and slip them into the mufflers.
If I find i don't like them or if the weight bothers me that much - I will just use them on the TBSS because it has dual exhaust and a single tip.
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