I assume you are talking about the Portland Historic Races and the
Pacific Northwest Historics which are July 3-5 and July 11-12, not the
Columbia River Classic which is Sept 5-7 since there is no race at
Pacific Raceway the week before the CRC.
The Portland Historic races are an HMSA event, I don't know what noise
control level they'll be working with. You have to get a special
variance to exceed 105 db. A supertrapp is generally plenty. I've run
Peyote with an open exhaust at PIR and not exceeded the limit, but I
was just trying that out to see what worse case was. I run a light
muffler and never have a problem--nothing as restrictive as a
supertrapp.
I don't know what the limit at Pacifc Raceways is, but it's generally
less restrictive than PIR. great track.
On Mar 20, 2009, at 12:37 PM, Greg Lunker Hilyer wrote:
> How about noise restrictions in Portland? A SCCA racer/friend
> recently told me about about the noise restrictions at Laguna Seca.
> Said that to get a SuperTrapp [like mine] to conform [90db?]] choked
> it about to death. Went on to say that Portland is not nearly as
> restrictive. What db do we have to conform to? Any thoughts on
> baffled SuperTrapp vs. glass pack [+?] etc. Hope to do Seattle
> [Pacific but always SIR to me] the weekend before - what's their
> policy?
> Thanks,
>
> Greg "Lunker" Hilyer
> TR4 #314
> Albuquerque NM
> On Mar 20, 2009, at 2:45 PM, Bill Babcock wrote:
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