Question about 2005 Ducati Monster S4R

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S4R ECU/PCIII/Open Air Box Question

I have a question about changing the air box on my S4R. I hear that going with an open air box will require extreme ECU/ PC changes and could be costly. Any suggestions? Thanks

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I have the same mods. on my ST4s and went with the DP ecu , basically if you open up the airbox you should match the fueling (DP ecu or PC111) to get it to work well. Is it worth the effort? Yes, the mid range fills in and there is a horsepower increase on top. I noticed in situations where I required a downshift or two I now no longer do (degreeing my cams gave a simular result). Thats my 2 cents.

Posted on Nov 20, 2008

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Posted on Jan 02, 2017

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Hi everybody. I have a Ducati s4r 996 i have exhaust system open airbox with k&n filter and some tweaking on the Co trim, the bike runs a little bit rich but this is just until the power commander to...


No, not the spark plugs. Likely a limp mode from the bikes ECU. Your air box and filter modes may cause a lean fuel condition, not rich. Wait till you get and install your Power Commander. The ECU should reset when you disconnect the battery for the PC install. Make sure you get the right map for your PC.

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The air filter cover seems to be stuck. I have removed the two front bolts and no other clips or bolts are on the air cleaner cover. It won't budge.


What you are seeing when you open the hood is not the air box. The air box is attached to the air hose that comes off the bottom of the air chamber, do not try to open the air chamber if you brake it you will have to replace it, so after you loosen the hose clamp off the throttle body and take the 2 10mm. bolts off the front of the air chamber and loosen the air tube hose clamps from the bottom of the air chamber you can take it off. Now you can see the Air box. On the upper side of the air box locate a metal 3/8 screw and remove, this will free up the air box and allow you to remove it. To remove, tilt air box to the left and lift out. Once you have removed the air box unlock the two clip this will allow you to open the air box so you can change the air filter.


Let me know if this helps.

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What would be the ported enclosure airspace requirement for a dynex 10" sub?


For optimal performance there is really only one size for the box .Firstly, you get two different types of subwoofers, an open air, or closed air sub. If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long. Box size will be 11 inches x 11 inches x 11 inches. Hope this helps

Feb 25, 2011 | Dynex 10" Single-Voice-Coil 4-Ohm...

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Does anyone know the actual airspace requirements for sealed and ported enclosures on these speakers? Please no idiots building cube boxes need to respond!


For optimal performance there is really only one size for the box .Firstly, you get two different types of subwoofers, an open air, or closed air sub. If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long. Box size will be 11 inches x 11 inches x 11 inches. Hope this helps

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I have an old lanzar 10 inch subwoofer that is open airs series and need to know the required airspace for best performance


For optimal performance there is really only one size for the box .Firstly, you get two different types of subwoofers, an open air, or closed air sub. If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long. Box size will be 11 inches x 11 inches x 11 inches. Hope this helps

Feb 11, 2011 | Lanzar MAX12D Car Subwoofer

1 Answer

Need to know airspace required for this sub


For optimal performance there is really only one size for the box .Firstly, you get two different types of subwoofers, an open air, or closed air sub. If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long. Box size will be 13 inches x 13 inches x 13 inches

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1 Answer

Need dimensions for 12' 450watt IMPP Subwoolfers for proper air space


Subwoofers differ in only one way. You get an "Open Air" and a "Closed air" subwoofer, That being said, you'll have to check on your magnet which one you have to make the boxes for that sub. If it is an "Open air" Subwoofer, you should see a "wire mesh" or "grid" in the centre, at the back of the magnet. If it is a "Closed air", the magnet will be solid with no hole whatsoever.

If it is a "Open air" sub, your boxes should be sealed with silicone, and no ports are to be cut in your box.

With "Closed air" subs, you should have 2 ports below your sub and the port sizes should be around 50mm in diameter. You should start with a 100mm long piece in the one box and add 50mm increments to "tune" the port up to 200mm, depending on the frequency of bass you require.

On a 12 inch subwoofer ranging between 80Hz and 120Hz, the box size required should be around 27 liters, meaning that you will end up with a box of 16 inches high, x 16 inches wide, x 16 inches deep. Or 320mm high, x 320mm wide, x 320mm deep.
Enjoy!

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1 Answer

I can't open the air box enough to change the filter


yes you have to remove clamp at mas air flow to get air box out to replace filter.

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