Bladerunner
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| posted on 7/7/08 at 03:31 PM |
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Induction Noise
I am running a Fireblade with Pipercross sock air filters. As Elvington trackdays are now limited to 98DB I have a problem as I run out at 101DB.
Spoken to somebody who said that if I can reduce my induction noise that would help considerably. Any ideas how this is done?
Adventure before Dementia
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mackei23b
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| posted on 7/7/08 at 03:37 PM |
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Run and airbox?
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eznfrank
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| posted on 7/7/08 at 03:40 PM |
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As above, only use socks if there's no other option, too restrictive.
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Mr Whippy
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| posted on 7/7/08 at 03:40 PM |
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get a lightweight carbon bike exhaust can and stick it on the intake.
I am serious here 
[Edited on 7/7/08 by Mr Whippy]
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Dangle_kt
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| posted on 7/7/08 at 03:42 PM |
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just run the standard fireblade airbox, problem solved.
Thats what I'm doing
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smart51
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| posted on 7/7/08 at 04:50 PM |
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Make an airbox that fits under the bonnet. Make the inlet to the airbox face forwards. It "projects" the sound away from the noise
meter.
above the resonant frequency of the box, the inlet port becomes "accoustically opaque" meaning that the noise doesn't get out,
although noise gets out through the case. Make the inlet port fairly long and with a large diameter. Make the pipe perforated, line it with blue
seating foam and fit a larger tube round it, with ends to seal. It acts like an inlet silencer. I make my induction road noticeably quieter, say
10dB or so.
Don't use an exhaust silencer. You don't want to suck any of the wadding into your engine. Also, you don't want the weight of a
metal silencer.
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Bladerunner
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| posted on 7/7/08 at 06:04 PM |
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Noise
Sounds good, I don't have the original air box, and I had to re-jet the carbs to bigger jets to balance the fule going in. I will cast about
for an air box or try building one myself.
many thanks.
Adventure before Dementia
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