5.0L XKR/XKR-S induction Design
#1
The following 3 users liked this post by FrickenJag:
#2
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FrickenJag (05-03-2018)
#3
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FrickenJag (05-03-2018)
#4
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FrickenJag (05-03-2018)
#5
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FrickenJag (05-03-2018)
#6
The 4.2s had a bunch of blower whine, which isn't necessarily a BAD thing, and the 5.0s don't have any noticeable whine at all, which isn't necessarily a BAD thing......... There should be some servos or something somewhere that block off the chambers when in DYNAMIC MODE, for extra fun noises.
The following 2 users liked this post by Cee Jay:
FrickenJag (05-03-2018),
jahummer (05-03-2018)
#8
The 4.2s had a bunch of blower whine, which isn't necessarily a BAD thing, and the 5.0s don't have any noticeable whine at all, which isn't necessarily a BAD thing......... There should be some servos or something somewhere that block off the chambers when in DYNAMIC MODE, for extra fun noises.
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Cee Jay (05-03-2018)
#9
Investing in couple projects at moment, 5.0L highflow cats first, then I'll finish the header. Flanges made, collecters are fabbed, just need to lift and start fabbing. Just have had a lot of other client projects slowing me down.
#10
Flow destroying resonance and standing waves occurs at different frequencies and at different points in a tube. So you need chambers tuned to specific frequencies at different points. The science is harder than 3dimensional chess to me, in just getting air to flow through a tube, but this tube is attached to an air pump (the engine), and they are using these cylinders on the intake to take pulses out of the engine primarily.
#11
Doesn't work that way, different volume / length / diameter to cancel different frequencies and God save you if resonance or harmonics come into play. The small chambers effect higher pitches noises. I'd bet there's more testing and design into Noise / Vibration / Harshness versus any other dynamic on a chassis. Gentlemen want a quiet hot rod and so does the government. Passing the drive by noise levels can be difficult for econoboxes much less grand touring supercars.
#12
Doesn't work that way, different volume / length / diameter to cancel different frequencies and God save you if resonance or harmonics come into play. The small chambers effect higher pitches noises. I'd bet there's more testing and design into Noise / Vibration / Harshness versus any other dynamic on a chassis. Gentlemen want a quiet hot rod and so does the government. Passing the drive by noise levels can be difficult for econoboxes much less grand touring supercars.
Dave
#13
#14
Flanges and collectors are the easy part. Did you ever put a stock manifold on a flow bench to see what you're starting out with? I'm not saying it's gods gift to manifold design, but with tuners getting 600+ HP out of these engines at relatively modest boost pressures and the stock manifolds, I question whether a low-mid four figure set of headers is going to be that much better than a set of extrude honed stockers... especially when you can pick up a spare set to send off for under $200 on eBay.
#15
For best flow, it would be perfectly smooth.
They likely wanted to pipe in the noise in the cabin after they cleaned it up.
The following users liked this post:
Cee Jay (05-23-2018)
#16
I think that unless you have a PhD in fluid dynamics, you really aren't in a position to speak in absolute terms regarding intake resonators and their purpose/ function. Quit speculating and posting bs based on 50 year old wives tales.
Me? I'm just a guy that knows how to research and regurgitate. Scroll down to figure 9 if you like pictures instead of words: https://www.researchgate.net/publication/288944484_Computational_analysis_of_air_intake_sys tem_for_internal_combustion_engine_in_presence_of_ acoustic_resonator
Me? I'm just a guy that knows how to research and regurgitate. Scroll down to figure 9 if you like pictures instead of words: https://www.researchgate.net/publication/288944484_Computational_analysis_of_air_intake_sys tem_for_internal_combustion_engine_in_presence_of_ acoustic_resonator
The following 2 users liked this post by Mandrake:
Jagdfan (05-30-2018),
Queen and Country (05-23-2018)
#17
#18
I think that unless you have a PhD in fluid dynamics, you really aren't in a position to speak in absolute terms regarding intake resonators and their purpose/ function. Quit speculating and posting bs based on 50 year old wives tales.
Me? I'm just a guy that knows how to research and regurgitate. Scroll down to figure 9 if you like pictures instead of words: https://www.researchgate.net/publica...stic_resonator
Me? I'm just a guy that knows how to research and regurgitate. Scroll down to figure 9 if you like pictures instead of words: https://www.researchgate.net/publica...stic_resonator
That article cleared one thing up for me- there is software to help in the design.
In case anyone missed the punchline (as this comes up often):"An intake system with resonator gives a significant improvement of volumetric efficiency at medium and high speed compared to the intake system without resonator. "
Last edited by Queen and Country; 05-23-2018 at 12:34 PM. Reason: forgot to add
#19
I think that unless you have a PhD in fluid dynamics, you really aren't in a position to speak in absolute terms regarding intake resonators and their purpose/ function. Quit speculating and posting bs based on 50 year old wives tales.
Me? I'm just a guy that knows how to research and regurgitate. Scroll down to figure 9 if you like pictures instead of words: https://www.researchgate.net/publica...stic_resonator
Me? I'm just a guy that knows how to research and regurgitate. Scroll down to figure 9 if you like pictures instead of words: https://www.researchgate.net/publica...stic_resonator
Maybe I do.
#20