parametric eq questions

[bikejunkie223 10+ year member]

You could create a 200Hz note cd and then play it in your car and an energizing volume and then step out of the car and feel the metal. The panels that "feel" the most active are probably your culprits. And as Squeak says, doing your doors won't help. 200Hz is most likely the roof, the pans, or some other large body panel. Again the best way to stop this is with a lot of deadening, but you do have to be lucky and find the right spots.

That is a freeking good idea right there. I'm gonna try that this weekend and see. Pulling the headliner sucks, but I have done it before on an Si ( I work at a Honda dealership in the service dept) and that wouldn't be too bad to dampen- the carpet would be harder, but anything is doable if I want to spend the time. Do you guys recomend sheet dampener like Dynamat extreme or cascade, or the liquid stuff you paint on? I really want to make this as good an SQ car as I can with the equipment I have for now.

 

[///M5 10+ year member]

I will let someone else comment on the dampeners as I haven't used them all, but one other thing you can do to. If it happens to be floor panels adding a structural piece of some sort on the bottom of the car to stiffen it up will also change the body modes. Just like a bar connecting the chassis/pan/subframe with a little tension on it. It might shift the frequency up into a range that is less annoying due to the exhaust. Again the key is to add mass or stiffness, both will raise the frequency and dampen the energy.

Since I interrupted the question, what would you guys use to dampen the floor/roof of junkie's car?