New pelli sound limit

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dewittpayne
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Re: New pelli sound limit

Post by dewittpayne »

Does 93 mean 93 or 94.5?
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Re: New pelli sound limit

Post by MARKP »

93. No fudge on Pellissippi's limit.

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Re: New pelli sound limit

Post by EliseAutoXr »

Totally understood, but that will make things even more difficult for me. I will get a new muffler over the winter and with some tricks that have been suggested I can play again.
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Re: New pelli sound limit

Post by Challenger »

Well since I'm typically around 93 I'm open to suggestions on how to knock it down a bit.

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Re: New pelli sound limit

Post by MikeKelly »

joker717 wrote:So can I go ahead and call out warnings at 93 for this event? Not DNFs at 93 but at least go ahead and drop the warning level to 93db.
I'm inclined to drop warnings completely and refer people to the hall of shame for that - all warnings accomplish is to get people soft pedaling past the sound meter (and we're going to have to call DNFs on that practice too).

And excessive radio traffic.

jcox07 wrote:Jim, I think Mike has a solution for you already and I think he will have it at pelli for this Sunday and this new limit is not in effect till the November event at pelli as this Sunday's event is still 96 db.
The new limit is news to me, but not completely unanticipated - Luckily enough (after 5+ years of thought + experimentation) I have recently developed a suitable and somewhat cost effective 4" SuperTrapp installation for Cobra sidepipes - I think it will do everything we need it to do - if not, we're simply out.


It's also going to be fairly easily adapted to most rear exhaust installations.

We'll see how it works on my car Sunday.


I've got plenty of 4" SuperTrapp stuff available for prototyping, but if anyone has some 5" SuperTrapp stuff laying around spare - it would be helpful if I could borrow some of that for prototyping over the next month - some of the higher HP cars / single exhaust outlet cars may require a 5" SuperTrapp answer which I am currently not able to prototype - If someone wants to start cornering the market on that sort of thing, here is a good place to start:

http://www.ebay.com/itm/SuperTrapp-Disc ... r9&vxp=mtr

http://www.ebay.com/itm/SuperTrapp-Muff ... iC&vxp=mtr


4" is good to 250hp each - 5" is good to 400hp each.


Gen52SS wrote:If someone blows 93db more than once are they done for the day? Are there any registered who are at or above the 93db from past events that might need a reminder before they get to the event? Hate to have a few not see this so late in the week who might be right at the old 96db make the trip and shut down for exceeding sound. ...Mike do we have a few this will effect?

Again, this is all brand new to me - but my advice to the board and solo committee is probably going to be to not let cars that are known to be over 93db start future pelli events (2016 event #12 and beyond) until their exhaust improvements are known and deemed fit to attempt to pass sound.

Newcomers (and anyone else) over 93db are probably going to have to go home on first offense (2016 event #12 and beyond) - the solo committee will have to come up with a policy covering those issues.


To that end, here is my 2016 hall of shame list (includes non-pelli advisory events):


XP 45 - Brian Robbins (#2 - 96.2)(#6 - 100.9 - banned)(#7 - 99.4)(#8 - 92.0)
CAMT 9 - Corey Williams (#2 - 100.8 - banned)
STM 98 - Doug Evans (#2 - 96.7)(#3 - 95.4)(#6 - 100.9 - banned)(#7 - 96.7) - (This car has been fixed)
STM 75 - Bradley Allen (#2 - 98.8 - self banned)
CAM 42 - David Hamilton (#3 - 90.2)(#6 - 98.1) - (This car was destroyed - fire)
STM 114 - Casey Bryson (#3 - 98.4)
STM 14 - Benjamin Endo (#3 - 98.3)
STM 53 - Gary Mitchell (#7 - 98.3)
PSTU 91 - Marcus Luttrell (#7 - 98.3) - (This car was destroyed - Road Atlanta)
SM 54 - Brook Bagwell (#6 - 97.8 )(#8 - 96.7)
PESP 199 - Jy Cox (#2 - 96.4)(#6 - 97.7)(#7 - 97.4)(#8 - 92.8 )
ASP 13 - Richard Graves (#8 - 97.4)
XP 106 - Jim Simmons (#2 - 96.5)(#6 - 97.3)(#7 - 95.7)(#8 - 93.4)
PSTX 11 - Mike Janssen (#2 - 97.2)
XP 1 - Clinton Woolson (#2 -93.2)(#7 - 96.8 )
AM 1 - Mike Kelly (#6 - 96.2)(#7 - 94.2)
NSM 100 - Devin Headrick (#2 - 91.8 )(#6 - 95.7)
XP 42 - Bob Ross (#6 - 91.7)(#7 - 95.7)
CAMT 15 - Brian LaRose (#2 - 95.5)(#7 - 94.5)
AM 78 - Chad Sumney (#6 - 95.3)(#7 - 92.2)
FS 23 - Stephen Vrooman (#3 - 91.9)(#6 - 95.2)(#7 - 94.0)(#8 - 95.1)
NCAM 68 - Ryan Tungett (#3 - 91.7)(#7 - 94.9)
FP 59 - Michael Washington (#7 - 94.9)
PSTS 96 - John Brown (#6 - 93.8 )(#7 - 94.7)(#8 - 91.8 )
NAS 35 - James Thomas - (#7 - 94.7)
CAMC 47 - Daniel Larson (#8 - 94.6)
STM 127 - Ben Bailey (#3 - 94.0)(#7 - 94.5)
SM99 - Jon Coatney (#2 - 94.0)(#7 - 91.7)(#8 - 91.9)
CAMC 7 - DeWitt Payne (#2 - 93.9)(#3 - 93.5)(#6 - 94.1)(#7 - 91.9)
NCAMS11 - Lee Daugherty (#7 - 93.2)
STR 34 - Patrick Whaley (#7 - 92.0)(#8 - 93.1)
STR 37 - Tim Ray (#7 - 92.3)
CAMT 9 - Corey Williams (#8 - 92.1)
SS 34 - Paul McFall (#2 - 91.8 )(#6 - 91.2)
STX 11 - Carl Peters (#7 - 91.6)
STR 10 Ben Foster (#8 - 91.2)
STU 98 Brian Flanagan (#8 - 90.4)
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Re: New pelli sound limit

Post by John Brown »

Even tho this event will be the old standard.. I strongly suggest every driver in the "DANGER ZONE" use this event to test and compli with the upcoming 93 Limit.
I suspect Ill be sub 90 Sunday.
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Re: New pelli sound limit

Post by ConeEater »

eunos735 wrote:Sounds like the end of Street tires.

Those things squeal louder than b 93 db :)

Hoosiers for all!!!!
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Re: New pelli sound limit

Post by ConeEater »

I'll just keep driving at my timid level that I seem to be stuck in...that should do it.
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dewittpayne
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Re: New pelli sound limit

Post by dewittpayne »

MarkP,

A 1.5 dB tolerance is not fudging, it's allowing for the error in the measuring device that might give you a false positive. You won't get a ticket for 1mph over the speed limit by radar because radar isn't that precise and accurate. In other words, if the limit is 93dB on the meter, you better have a car that is consistently below 91.5dB.
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Re: New pelli sound limit

Post by MikeKelly »

dewittpayne wrote:
A 1.5 dB tolerance is not fudging, it's allowing for the error in the measuring device that might give you a false positive.

Agreed.

However, we've received more generous quarter in this situation than I would have expected to receive.

And bear in mind that this club has never been called on the carpet about noise at pelli - at least not in my memory.

When we were setting our own limit at 96 and allowing a tolerance (and not getting called on the carpet) - that was one thing.


When pelli tells us our new limit is 93 - that is quite a different situation.




Below is good advice - if I had been asked I would have recommended complying with 93 (honest) this weekend - primarily for the purpose of highlighting the fact that this particular club actually watches sound like a hawk (honest + effective).

John Brown wrote:Even tho this event will be the old standard.. I strongly suggest every driver in the "DANGER ZONE" use this event to test and compli with the upcoming 93 Limit.
I suspect Ill be sub 90 Sunday.
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Re: New pelli sound limit

Post by joker717 »

Im going to bring my old Magnaflo and supertrapp setup this sunday if anyone wants it. Its not the prettiest thing but it kept my honda in the mid 80's at Pelli
FREE BTW
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Re: New pelli sound limit

Post by MikeKelly »

First dibs on the supertrapp part - I'll send it back out for free if I don't use it.
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Re: RE: Re: New pelli sound limit

Post by MARKP »

dewittpayne wrote:MarkP,

A 1.5 dB tolerance is not fudging, it's allowing for the error in the measuring device that might give you a false positive. You won't get a ticket for 1mph over the speed limit by radar because radar isn't that precise and accurate. In other words, if the limit is 93dB on the meter, you better have a car that is consistently below 91.5dB.
Similar to what Mike mentioned, this is Pellissippi's limit. They have not given us a tolerance. Use the next three events to get the level where you need it. The meter will be at every event for reference. As we all know, if you are close, you need to make changes. Atmospheric conditions, which we have no control of, can affect your readings.

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Re: New pelli sound limit

Post by dewittpayne »

The internal calibration on the sound meter also needs to be checked frequently and reset if necessary. Better than that would be purchase of a 94dB external calibrator with an NIST traceable calibration certificate. Without that, 93dB on our meter could be anywhere from 91.5 to 94.5, or worse considering that it likely hasn't been tested since it was purchased. The meter and calibrator should also be sent out for calibration and certification annually.

That probably wasn't necessary when it was just us. Now we need to show Pelli that we have a reliable system in place.
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Re: New pelli sound limit

Post by MikeKelly »

Our meter and calibration procedures were pretty comprehensively tested against a NIST calibrated meter earlier this year - complete results here:

http://forum.etrscca.org/viewtopic.php?f=13&t=9939


I found it to largely be a waste of time + available resources.

But I will take it under advisement for a repeat confirmation performance next year.


Assuming pelli is still viable for the 2017 season...
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