My 914 is not OSHA compliant, Interior engine noise |
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My 914 is not OSHA compliant, Interior engine noise |
Coondog |
Nov 12 2019, 10:24 PM
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#1
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Advanced Member Group: Members Posts: 2,089 Joined: 24-September 15 From: Apple Valley Calif Member No.: 19,195 Region Association: Southern California |
OSHA says that noise over 85 dba requires a written hearing protection program.
Well I measured the sound level at 3000 RPM and I was at 87 dba. Running a 3.2 with Bens headers. Lots of free dba apps out there at no cost. Usually about +/- 1-2 error rate. OSHAs hearing protection rules say anything over 90 dba 8 hour TWA requires hearing protection. Of course these rules don’t apply to us but check out your sound measurements next time you take a drive........ (IMG:style_emoticons/default/driving.gif) Also know that 90 dba is twice as loud as 85dba. |
porschetub |
Nov 15 2019, 03:55 PM
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#2
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Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
I went from individual K&N filters back to stock plastic air cleaner,noticed a reduction in noise and the advantage of better filtration and ease of tuning the carbs.
I did spend some time fixing the backfire damage on one side of the aircleaner due to blocked pump nozzles and one broken (leaking) air bleed screw. I'am still running the stock firewall insulation and have added some sound deadening behind the backpad...not too bad until you hit 3K + rpm then it gets a little loud. |
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