Lormax and I were discussing that yesterday. He does have experience using it so you may want to PM him.
Sound deadening on Karma
Has anyone tried using sound deadening material on their Karma (like Dynamat)? Lormax/Harleyguy, have you guys seen any Karmas with this material in use?
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Wondering how much it reduces noise in the Karma cabin (especially in Sport mode). Have you or Lormax seen a Karma that was it installed?Lormax and I were discussing that yesterday. He does have experience using it so you may want to PM him.
Without doing something about the glass, the impact will be very small, IMHO. In sport mode, most of the noise is from wind and tires. The car's machinery is already very quiet. In Sport mode also, you need to block the noise from coming through the glass because of the placement of the exhaust.Wondering how much it reduces noise in the Karma cabin (especially in Sport mode). Have you or Lormax seen a Karma that was it installed?
Lormax did the install on a customer car. He seemed to think it was worth it.Wondering how much it reduces noise in the Karma cabin (especially in Sport mode). Have you or Lormax seen a Karma that was it installed?
Any car that you use Dyna-Mat will help but as Fab stated the Karma has some other area's that cause the sound .
The exhaust is low to the ground - where does the glass/window come into play? Would have thought much of the sound transmission comes behind firewall and through the hood (and transmitted to windshield) no?Without doing something about the glass, the impact will be very small, IMHO. In sport mode, most of the noise is from wind and tires. The car's machinery is already very quiet. In Sport mode also, you need to block the noise from coming through the glass because of the placement of the exhaust.
Reflection mostly. At slower speeds, when driving next to other cars, highway barriers, or other structures, I can hear the sound of the ICE reflecting back through the window even at idle or at the low RPM levels. I can only hear the sound through the firewall when the engine is running at higher RPMs, for example accelerating uphill or trying to pass another car. The turbo whine is also much more noticeable at the higher loads, particularly when you let off and the turbo dumps the pressurized air, but I actually like the jet-engine noise.The exhaust is low to the ground - where does the glass/window come into play? Would have thought much of the sound transmission comes behind firewall and through the hood (and transmitted to windshield) no?
In Texas this time of the year, all I can hear is the A/C blowing at speed 10. I guess I could stuff some Dynamat in my ears.
Hee. On my long drive through Nevada I could hear the engine a bit over the air conditioning, but it was only in the low 90s (call it low 30s for those using degrees-C instead of degrees-F).In Texas this time of the year, all I can hear is the A/C blowing at speed 10. I guess I could stuff some Dynamat in my ears.
Of course I tend to keep the ipod player cranked up too.
The marketing cars that Fisker HQ had went through a whole slew of NVH (Noise, Vibration and Harshness) upgrades. Dyna-mat was just one of many of the things we did to quiet down the interior of the car. Personally I found it to make quite a difference, though again it wasn't the only thing done to the car to quiet it down.
Also from what I understand, Fisker HQ was putting together a quite extensive NVH upgrade package to filter down to the dealers for installation. Think of it as a dealer-installed option. Initial reports are that it wasn't going to be cheap, and take several days of work. I've gotten ahold of the document, as well as one of the technicians that helped put the package together to see if it's something I can offer in the near future.
I'll be heading out to Chicago for a job in early July, and Dyna-matting his vehicle has been discussed. I can post some reviews after that's done, as well as have the owner post some reviews as well.
Also from what I understand, Fisker HQ was putting together a quite extensive NVH upgrade package to filter down to the dealers for installation. Think of it as a dealer-installed option. Initial reports are that it wasn't going to be cheap, and take several days of work. I've gotten ahold of the document, as well as one of the technicians that helped put the package together to see if it's something I can offer in the near future.
I'll be heading out to Chicago for a job in early July, and Dyna-matting his vehicle has been discussed. I can post some reviews after that's done, as well as have the owner post some reviews as well.
Would be great to learn what NVH package consisted of - what else besides dynamat?The marketing cars that Fisker HQ had went through a whole slew of NVH (Noise, Vibration and Harshness) upgrades. Dyna-mat was just one of many of the things we did to quiet down the interior of the car. Personally I found it to make quite a difference, though again it wasn't the only thing done to the car to quiet it down.
Also from what I understand, Fisker HQ was putting together a quite extensive NVH upgrade package to filter down to the dealers for installation. Think of it as a dealer-installed option. Initial reports are that it wasn't going to be cheap, and take several days of work. I've gotten ahold of the document, as well as one of the technicians that helped put the package together to see if it's something I can offer in the near future.
I'll be heading out to Chicago for a job in early July, and Dyna-matting his vehicle has been discussed. I can post some reviews after that's done, as well as have the owner post some reviews as well.
personally I feel that anything involving ripping out the dash usually creates more problems than it fixes (not a dig at you)The marketing cars that Fisker HQ had went through a whole slew of NVH (Noise, Vibration and Harshness) upgrades. Dyna-mat was just one of many of the things we did to quiet down the interior of the car. Personally I found it to make quite a difference, though again it wasn't the only thing done to the car to quiet it down.
Also from what I understand, Fisker HQ was putting together a quite extensive NVH upgrade package to filter down to the dealers for installation. Think of it as a dealer-installed option. Initial reports are that it wasn't going to be cheap, and take several days of work. I've gotten ahold of the document, as well as one of the technicians that helped put the package together to see if it's something I can offer in the near future.
I'll be heading out to Chicago for a job in early July, and Dyna-matting his vehicle has been discussed. I can post some reviews after that's done, as well as have the owner post some reviews as well.
not to mention using industrial sound deadening foam from home depot is a little hack especially on a 100k car. Does it work? probably, but that whole NVH package was somewhat of an inside joke at fisker and another one of billy tally's "magic fixes"
There's no way I'd go as far as ripping out a dash...I agree with you there
it was supposed to be an "option" for fisker customers. the labor alone wouldve been $2200 @ ~15 hrs but apparently it was more of a 40 hour job according to the garage techs
did the package involve a new muffler or exhaust system or was it really just, as you said, a bunch of silly gimmicks/hacks?it was supposed to be an "option" for fisker customers. the labor alone wouldve been $2200 @ ~15 hrs but apparently it was more of a 40 hour job according to the garage techs
No new major parts. Sound deadening material and modification to the existing parts (like the window seals for one).
The sound deadening foam 8AVGMPG mentioned was the expanding foam from Home Depot to fill in the large tubular cavities that would allow sound to travel in the frame of the vehicle. Apparently the first versions of this didn't work out so well, because even after a week or two the foam would continue to eek out of the cavity as it finished curing. One of the techs found a much better alternative, though I don't know the source. Of course if someone else has any ideas on what to fill those areas of dead space with, please feel free to speak up.
Don't get me wrong, the first setup of this was done very 'backyard mechanic'. It was very rushed, had to be all done in like 2 days, and we were all learning exactly what worked and what didn't during those couple days. Were the cars quieter when we were done? You bet. Do I feel that first version could be improved upon? Yes, very much so. Either way, my guess is that someone will finally take the plunge and go for it, and actually be quite happy with the results.
The sound deadening foam 8AVGMPG mentioned was the expanding foam from Home Depot to fill in the large tubular cavities that would allow sound to travel in the frame of the vehicle. Apparently the first versions of this didn't work out so well, because even after a week or two the foam would continue to eek out of the cavity as it finished curing. One of the techs found a much better alternative, though I don't know the source. Of course if someone else has any ideas on what to fill those areas of dead space with, please feel free to speak up.
Don't get me wrong, the first setup of this was done very 'backyard mechanic'. It was very rushed, had to be all done in like 2 days, and we were all learning exactly what worked and what didn't during those couple days. Were the cars quieter when we were done? You bet. Do I feel that first version could be improved upon? Yes, very much so. Either way, my guess is that someone will finally take the plunge and go for it, and actually be quite happy with the results.
There's been some success with active noise reduction (electronic noise canceling) in airplane cabins. Did Fisker consider that as an option?
Here's a link to the automotive app: http://www.google.com/search?q=acti...UaOMHaLliALCwoFw&ved=0CEwQsAQ&biw=905&bih=505
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