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JeepAndBassXJ

All Out 170db SPL Build Log (SS 3-4) #AstroAndBass

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It has been a while since I started a full build log and I figured this was one I wanted to chronicle here rather than other social media platforms (just yet). 

This build is for a long time friend and customer Craig. We are essentially teaming up this season to operate the vehicle and reach a goal of 170db sealed on the windshield. Over several years of exposure in the spl/competition world I've been lucky enough to gain sponsors and work with companies who are backing the project in various ways; so I always want to give thanks to them!  

My main objective with this build log is to hopefully share some knowledge and also learn from you too! I'm always open to ideas and criticism; anything that could get us to our goal is worthwhile to try. 

So now lets get into it!!! 

We are using a 1993 Chevy Astro Van.  This build will consist of (4) DC 3" Neo 18's on (4) DC 10k's and (20) Banks of Maxwell Caps. Things will be added and changed as we get there. 

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As always, the first step is to completely strip the vehicle out. Only the interior in front of the b-pillar is needed and we will be replacing the carpets with an OEM mat floor and installing a vinyl headliner later on. Anything goes when it comes to the vehicle behind the b-pillar so we will be building a steel cage reinforced by concrete. The roof rails will be modified to maximize the usable room in the van. Again, nothing ahead of the b-pillar will be modified or removed. 

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The cutting begins and the roof braces are removed, the front most brace looks close to being past the b-pillar but we got luck and were able to remove it as it did not pass the pillar line. You can see the cut stopped at the pillar (this is important in upholding the rules). 

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At this point it was time to establish where my steel cage frame would be and start welding it in. I'm brushing up on my welding skills and am fighting between two metal thicknesses to make the vehicle attachments. Using a flux core mig welder. 

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Now there is a good start to a cage. I ended up extending it some as I was working out the floor layout as you can see. 

Edited by JeepAndBassXJ
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YouTube: https://www.youtube.com/user/JeepAndBass

Website: https://www.jeepandbass.com/

Picture1.png.a51bb49318e5269e42f12284828c2bb6.png

My Jeep: 162.2db dB Drag Style 164.2db Outlaw 

My Honda: 155.4 4dB Drag Style 158.0db Outlaw 

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As I add to the frame I am also setting up for a concrete pour. I have the floor partitioned off to be the first pour and the remaining sections of the enclosure (back, top, sides) will be a continuous pour once the shell is complete. There will be rebar throughout the pour to ensure things are well bonded and held in place. 

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Filling in the floor using a tested custom mix (CSU Chico University) with a yield strength of ~7000psi roughly a 50% water to cement ratio. I will be upping the ratio for the main pour to ensure the pour is less viscous to get it into hard to reach places ( you will see that later). The concern on the floor was the ~2" slab thickness. We opted not to do cross bars in the the rebar layout because of issues concerning the aggregate fitting between bars.    

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I tooled the concrete to have a porous surface so that I can epoxy the wood floor to it later. The sides will have wood pre-installed before the final pour with appropriate mechanical bondings cast in.  

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In the mean time I finished more of  the cage and cut the roof open to give us access for the concrete pour. I have to install the wood interior and make a rear forum still. The b-pillar has been welded shut to make a perfect seal.  

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YouTube: https://www.youtube.com/user/JeepAndBass

Website: https://www.jeepandbass.com/

Picture1.png.a51bb49318e5269e42f12284828c2bb6.png

My Jeep: 162.2db dB Drag Style 164.2db Outlaw 

My Honda: 155.4 4dB Drag Style 158.0db Outlaw 

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Jaw dropping.  Have always loved your builds.  Now taking it to another level.  Can't wait to see how you guys do reaching your goals....

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2007 Chevy Tahoe

12 ~ FI Audio X series 10" w/BP option

2 ~ DC Audio 5.0K @0.67

3 ~ DC Audio 5.0K @1.0 

2 ~ PPI 3 way sets (not installed yet)

1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4

4 ~ CT Sounds 5.25" Strato comps  (rear fill only)

1 ~ XS Power D4800

1 ~ XS Power D3400

8 ~ XS Power XP3000

160 stock alt, Mechman 370 Elite, 185 DC Power

320+ Sq. Ft. Sound Deadener

Pioneer AVH-X5500BHS

Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0

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Dammit... Cliche time... EPIC!! 

You have an engineer mind-state. Cheater! Lol good shit Ray. Post often please. Everybody here at SMD won't mind at all. 

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Shit is crazy already, love your builds always super clean and unique.

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3 Sundown SA-10's D4 ohm

American Bass VFL 120.1 Running at .6 ohms

250amp alternator

Mids all Alpine type R 's 2 set's of 6.5 components and 1 set of 6x8's 

3 Rockford PBR's 300x2

6 Kinetic batteries

F150 Supercrew 2010

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6 hours ago, CrackFactory said:

Badass. That thing is going to be sooo heavy. Are you planning on beefing up the suspension or will it be a trailer queen? Haha. 

As much as a pride having drivable builds this one is going to a trailer queen. Just no way around it for the application. I’d try other methods like the two part foam or composites but I’m a fan of concrete and know it well. :) 



YouTube: https://www.youtube.com/user/JeepAndBass

Website: https://www.jeepandbass.com/

Picture1.png.a51bb49318e5269e42f12284828c2bb6.png

My Jeep: 162.2db dB Drag Style 164.2db Outlaw 

My Honda: 155.4 4dB Drag Style 158.0db Outlaw 

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5 hours ago, 8v fury said:

When do you plan on having it finished.

 

The main portion build (up to first testing) will hopefully be done by May. Then from there will be several months of testing and adjustments. 



YouTube: https://www.youtube.com/user/JeepAndBass

Website: https://www.jeepandbass.com/

Picture1.png.a51bb49318e5269e42f12284828c2bb6.png

My Jeep: 162.2db dB Drag Style 164.2db Outlaw 

My Honda: 155.4 4dB Drag Style 158.0db Outlaw 

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