Massimo 400 - Noise reduction

[TCAM]

I recently purchased a 2020 Massimo 400 EFI and  began installing soundproofing to lower the overall body noise.  The model I choose is the crew cab with rear facing seat and diamond plate bed.  

the first phase involved removing the rear deck and applying Noico 80 mil sound deadening mat over the exposed diamond plate sections of the underside.  This immediately removed the  sound of vibrating metal plate!

Next phase is to continue this application to the interior of the plastic  around the engine compartment and then any other plastic panel that has a "hollow" sound.   It will add 2-3 pounds to the overall vehicle weight  but it makes a huge difference in noise reduction.  One question I have - there is a vent directly in front of the engine (behind a drivers leg about calf level)  I am strongly thinking about covering this as the level of engine noise here is huge.  The engine is water cooled so I don't think this is a problem as the air input is minimal - but i don't wish to overheat the engine.

Thoughts?  

  

[Blair]

Did you cover the vent? I want to do the same thing. How did that work out? Did it overheat? 

Thanks
Blair

[Tom Hoppes]

I covered the vent on mine over the cold months mostly to keep the dust out of my soft cab.  Didn't notice any temp problems.

[Blair]

Think I'll try it over spring/summer. I'll let you know if it has a negative effect. Thanks