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For any of you guys that have this probblem just have any theory about it.
For some reason everytime I push the button the windshield breaks. I don't think its the 42hz tone, because Steve Mick plays the same note and his is 3 db louder than mine. He hasn't broken the Windshield yet, but mine breaks at every show. I have 9 Hifonics olympus 2412's, and 3 Crunch GP3000d Pro's.
Gene and I were thinking that it could be the flare on the opening to the port. It may be flared to much and the focus of the pressure is more in the center of the windshield and not the passenger side. I'm just wandering if anyone has had experience with this or has any ideas?
quote:Originally posted by thanosdbfan: Is it the same car with steve Mick's? Have you measured the spl on the midle of the windshield? Is it louder than the regular dbdrag spot?
I believe that if you change the flared ends it would affect the tuning frequency...
Is 42 hz the peak frequency or do you have the same score at 41 and 43 hz also?If this is the case maybe the box needs some tweeking...
Steve and I have the same van basically. But no I haven't tested the spl in the middle of the windshield. I'll have to give it a try it. If I adjust the flare I can adjust the box to bring the note back.
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I would try The quick set or regular setting Urathane called Proform, it is by far the best windshield adhesive. Don't be shy with it when you use it. Its an approved windshield adhesive that further strengthens the roof/pillars without sacrificing safety.
As far as lowering the pressure on the center of the windshield and shifting that energy to the mic I would try flaring the loading wall toward the passengers side so you don't have that collapse directly at the ports edge and the standing waves at the top of the window closest to the wall/port. You may have to shorten the port depth to readjust for the flare but it would only be 1-3 inches.
I hope that helps, You don't have it easy thats for sure with your vehicle, but it must be damn fun playing in it and testing.
There are other ways to lower specific points but those require box adjusting inside.
-------------------- -Donald Hebig
-Saskatchewan dB Drag event promoter Posts: 1961 | From: Borden, Saskatchewan. Canada | Registered: Feb 2000
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The next time you have to replace a windshield check the frame. My cousin owns a glass shop and he said you wouldn't believe the amount of broken windshields from a simple high spot on the frame. We took my S-10 that broke 3 windshields in a row and completly smoothed out the frame. Exact same windshield, same SPL, yadda yadda yadda and no more breaking.
Also check the manufacturer of the windshields you are getting. Around here if you get Auto-lite (I think that's the name) then you are garunteed a broken windshield. They are actually a little thinner and stiffer than factory.
-------------------- Walkin' the dogs, and leadin' the puppies
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Man I hope I have this problem when my install is done! lol
Ps. I seen you at Taylor,Mich and the first thing I thought was type of glue. Good luck fixing it either way Eric, hope to see more of your van, it was very pleasing to watch!
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yes a high spot will break them EVERY time! use a flat file and go around where the windshield seats. use over 1 tube of urathane adheasive. and yes switch brands of glass try ppg if you can.
Posts: 6348 | From: north rose,ny | Registered: Aug 2002
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i am curious what spL readings on the TL would you need to actualy break a windshield ?? say 160 db with a wall or can a box design do it say like in a Panda in street C at a 45hz ??
Most of the time it's not the actual dB level that breaks a windshield. Every windshield has a different amount of flex before the outside layers will actually crack. Also different vehicles hold their windshield differently. For instance my wife has a Honda Element. These vehicles are very prone to cracked windshields, she has an 03 and has been through 3 windshields. Some people have simply flicked the windshield and made them crack. Breaking windshields are great for the spectators but suck for the competitors. I went through 4 of them back in 99 before I decided to replace it with plexi, it was already considered extreme by today's standards.
I do hope Eric got the windshield problem fixed and will enlighten us on what he found.
-------------------- Walkin' the dogs, and leadin' the puppies
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I had the windshield replaced, and the guy that did it said that it wasn't preped right before. That's the reason why the windshield wouldn't stay on. I'm still scared to turn it up. It's expensive to keep replacing windshields.
quote:Originally posted by Team Livewire - Eric: I had the windshield replaced, and the guy that did it said that it wasn't preped right before. That's the reason why the windshield wouldn't stay on. I'm still scared to turn it up cause im a sissy and its to loud and makes me cry.
FIXED
-------------------- Team Ohio Spl Team Baldman Creations Posts: 1243 | From: sidney oh | Registered: Aug 2001
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if the guy who installed it said it wasn't prepped right before, I'd be expecting it to be replaced for free. He admitted it was his fault. the end
-------------------- World Record-Loudest SPL in my driveway Team Powermaster/XS-Power Hifonics Amps, Kicker subs-The way it should be....all were Stolen from me...boo hoo Zensky....World Domination at It's Finest www.zensky.com Posts: 3714 | From: Columbus, OH - formerly FL | Registered: Oct 2003
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Damn, I would love that to have this problem just a few times! lol
-------------------- www.competitionsoundz.com Team R&R TEAM MAXXSONICS (Feel the Power!) TEAM Cactus Sounds (Japan) TEAM Power Master (Japan) LFG Fareast. He may not come when you want but, he's always right on time! Posts: 1524 | From: Fukushima, Japan | Registered: Mar 2005
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The PPG glass is one of the best you can get. IF the glass sites on the shelf for very long it will also warp in the stand. Once installed it has unven pressure and breaks easy, simply pressing with 1 finger on it will break or crack it.
Something else to think about is is the van has ever been wrecked or had the uni-body tweaked. That can casue a twisted frame effect. That brings me to the next point. Did you use expanding foam bewteen the encloser and the van.....little to much maybe ?
What about.... the encloser bolted to the van it self.....how tight ? Any chance that the encloser isn't square ? Bolting the box to the van CAN cause the sheet metal rook and whishield frame to tweek......could the encloser be casueing force that may apply uneven pressure on the van ?
Haveing been on the roof of your van 1st hand I would be wondering if the front roof suport at winshield frame is loose. If that suport moves the whishield frame is sure to do some funy things......Possable that suport could have been tweaked by something ??????
If you need glass I can still get you hooked up, just Pm me.
-------------------- TEAM MICHIGAN FTW !!!! -----TjsAudio-------- Posts: 1328 | From: Allegan Michigan | Registered: Jan 2007
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I haven't put any foam in the front of the vehicle, but the guy that had the van before me did put foam inbetween the roof and that front roof brace. That makes me think that the welds were already broken and I'm losing some spl. As far as the box goes, I built it to the vehicle or in some areas as close as I could get. Then I filled in any gaps. So I don't think that the box would be pulling on the frame.
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