Header Decibels

« **on:** April 03, 2009, 08:16:50 PM »

Ok so here goes guys.. My first post and sorry for no pics yet.. New computer and haven't got to it yet... I have basset headers and was wondering what decibel reading I would be looking at... My state has a noise limit of 90 DBs at idle... Think I'll fail and if so I would like some thoughts..

« **Reply #1 on:** April 03, 2009, 08:23:36 PM »

You will need mufflers....open headers will be over 90db

« **Reply #2 on:** April 03, 2009, 08:26:52 PM »

Quote from: OC2Vegas on April 03, 2009, 08:23:36 PM

You will need mufflers....open headers will be over 90db

Sell him yours......... your not using them

« **Reply #3 on:** April 03, 2009, 08:30:23 PM »

What about inserts.. i have seen some from Rex and CP Performance that claim a 10 DB drop.. How are they on affecting performance.. It is a blue oval and we need all the performance we can get..

« **Reply #4 on:** April 03, 2009, 08:31:56 PM »

Quote from: 2savage4you on April 03, 2009, 08:26:52 PM

Sell him yours......... your not using them

BWAHAHAHAHAHAHAHAHA.................... .......

« **Reply #5 on:** April 03, 2009, 08:37:30 PM »

Funny boys!

« **Reply #6 on:** April 03, 2009, 08:44:05 PM »

FWIW I'm not using mine either, Jeremy.

Call it a protest.......that'll cost me alot in fines eventually I'm sure. Lakes around here want 88 or 89 decibels. dunno if that's at idle or not tho. Eventually I'll conform, maybe, possibly, who knows.

Ray

« **Reply #7 on:** April 03, 2009, 08:45:28 PM »

I am going thru transom anyways!

« **Reply #8 on:** April 03, 2009, 08:48:59 PM »

Quote from: IRRebel on April 03, 2009, 08:44:05 PM

FWIW I'm not using mine either, Jeremy. Call it a protest.......that'll cost me alot in fines eventually I'm sure. Lakes around here want 88 or 89 decibels. dunno if that's at idle or not tho. Eventually I'll conform, maybe, possibly, who knows.

Ray

Figures , all you Ford guys are law breakers anyways

Quote from: OC2Vegas on April 03, 2009, 08:45:28 PM

I am going thru transom anyways!

Yeah, me too

« **Reply #9 on:** April 03, 2009, 08:52:35 PM »

Quote from: 2savage4you on April 03, 2009, 08:48:59 PM

Yeah, me too

On what boat?

« **Reply #10 on:** April 03, 2009, 08:55:17 PM »

Quote from: IRRebel on April 03, 2009, 08:44:05 PM

FWIW I'm not using mine either, Jeremy. Call it a protest.......that'll cost me alot in fines eventually I'm sure. Lakes around here want 88 or 89 decibels. dunno if that's at idle or not tho. Eventually I'll conform, maybe, possibly, who knows.

Ray

90db is what the USCG says. Open headers won't make your boat faster, just noisier, thereby drawing more attention to you and with your paint scheme, I think you have that covered

« **Reply #11 on:** April 03, 2009, 09:02:13 PM »

You guys just gave me a great idea tho!

Gonna mount the baffles in here. That way if they ask if I'm running mufflers, YUP!

I'm going to prison, I just know it. They're gonna lock me up for operating a water craft while retarded. But I get to meet all 2sav's friends i guess.

Ray

« **Reply #12 on:** April 03, 2009, 09:04:17 PM »

if they havent locked steve up yet for that, oh wait.............

« **Reply #13 on:** April 03, 2009, 09:04:45 PM »

You guys are brutal!

FWIW I had Bassetts on my 468 Chevy and with the insert mufflers it was not even close to legal, I made some adapters for Super Trapps and used the 4" baffles along with the insert mufflers and installed 36 baffles per side, got it down to 87db and took off approx. 300 Top end RPM, Ironically the same RPM and sound level the same motor made in a boat with thru transom logs/snails with the same build jet pump

I still have the same boat and motor, but sold the Bassetts, now going to install logs (thanks blownmiller) and OT pipes and some Borla's (being made right now).

GT

« **Reply #14 on:** April 03, 2009, 09:39:21 PM »

Quote from: osbo68 on April 03, 2009, 08:16:50 PM

Ok so here goes guys.. My first post and sorry for no pics yet.. New computer and haven't got to it yet... I have basset headers and was wondering what decibel reading I would be looking at... My state has a noise limit of 90 DBs at idle... Think I'll fail and if so I would like some thoughts..

A few years back I was so obsessed by this "issue" I bought a Pro Decible meter and tested damn near everything ! you will be surprised , My wifes F150 with flowmaster wouldn't pass most state boat laws , to tired for more tonite , more mannana~ Tom
This is a Led Zep "Rift" at part volume from my office stereo this is the legal limit for open OT headers in most states

« **Reply #15 on:** April 03, 2009, 09:59:54 PM »

Funny thing about those decibel meters is this, and I don't know if the rangers know this or not. In my former life, I was a District Manager for Radio Shack, and one of my stores sold 250 of them to the Ohio Highway Patrol so they could issue tickets to these 'subwoofer' freaks. What they didn't know was they need to be recalibrated like at least every year. Neither did I. Every year that store had huge sales in July because of the recalibration repair costs, about $55 a unit back then. And they bought more every time, talk about repeat business!

If they didn't, and didn't have the documentation that it was done, tickets would be tossed out of court.

Just a little fact about those meters. And I beleive it needs to be read at like an 80 foot distance, no?

Ray

« **Reply #16 on:** April 03, 2009, 10:03:24 PM »

Quote from: IRRebel on April 03, 2009, 09:59:54 PM

Funny thing about those decibel meters is this, and I don't know if the rangers know this or not. In my former life, I was a District Manager for Radio Shack, and one of my stores sold 250 of them to the Ohio Highway Patrol so they could issue tickets to these 'subwoofer' freaks. What they didn't know was they need to be recalibrated like at least every year. Neither did I. Every year that store had huge sales in July because of the recalibration repair costs, about $55 a unit back then. And they bought more every time, talk about repeat business!

If they didn't, and didn't have the documentation that it was done, tickets would be tossed out of court.

Just a little fact about those meters. And I beleive it needs to be read at like an 80 foot distance, no?

Ray

Si. 80 feet.

They also had to be trained and all use the same meter (looks like the model Tommy has there), I use the one for my work and it has a calibration transmitter with it, this is like a $2500 meter, and it read louder than the one Ranger Rick used...

GT

« **Reply #17 on:** April 03, 2009, 11:40:41 PM »

Then I'm golden! Not one of those pinheads can keep up with my illogic! After the technical, I'll have them admitting to crap they never even done.

Ray

See you guys when I get outta Levenworth...........

« **Reply #18 on:** April 04, 2009, 08:51:23 AM »

Well thx for the input especially on the insert thing.. I had thru hull's with logs on my 79' Hawiaan.. The sound was great and she would turn 5800 rpm on a big chevy.. had to sell her thou. Always wanted OT's and said if I bought another one.. Well guess I wait for the ice to finish melting and I'll go deal with johnny law...lol...

« **Reply #19 on:** April 04, 2009, 08:56:26 AM »

What's with this 80' measurement you guys are talking about...

« **Reply #20 on:** April 04, 2009, 12:34:03 PM »

Most noise laws state a maximum Db at "X" number of feet.

Most roundy round tracks tried to keep us to 100Db at 100'. The Pro4 car with the Olds Quad4 was always being harassed about being too loud

« **Reply #21 on:** April 04, 2009, 02:19:46 PM »

OK thanks for that answer.. Guess I'll have to look that part of the law up... Damm it sucks being old and responsible...

« **Reply #22 on:** April 04, 2009, 05:20:31 PM »

<------------old and IRresponsible.............

Ray

« **Reply #23 on:** April 04, 2009, 05:45:44 PM »

If its to loud, then your..... Well you know what they say!

osbo68

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2savage4you

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