extra_stout
5 Year Member
In general:
If you use chambered mufflers (compared to absorbtion mufflers) they will be more loud with low massflow (low RPM, low load), they will be more quite (compared to absorbtion mufflers) at high massflow (high load, high RPM). From sound: chambered mufflers have normally one frequency range where the dampen more than in other frequencies (this depends extremely on the internals). The absorption mufflers don't filter low frequencies and start to dampen in mid range frequency and start than to dampen more with higher frequency.
I don't know how much space there is with you current exhaust routing, but some additional glasspacks could help (use the thrush). It will also smoothen the exhaust tone, I'm not sure if you will like that.
That is just the exhaust tone and loudness.
If you have a drone/boom of the body, you can play with additional hangers. E.g. put the additional hangers to the transmission crossmember. A flex pipe in front of the transmission crossmember could also help, but this will be to difficult in your case, i would think.
The dumped exhaust will lead IMO to excitation of the body in this area around the tail pipe. dampening material (with high mass and alu finisihng surface) om the body will help to prevent the boom noise. I would but this staff on under the rear seat bank and under the trunk carpet.
Can you tell if it is only at some RPMs when it is to loud?!
If you use chambered mufflers (compared to absorbtion mufflers) they will be more loud with low massflow (low RPM, low load), they will be more quite (compared to absorbtion mufflers) at high massflow (high load, high RPM). From sound: chambered mufflers have normally one frequency range where the dampen more than in other frequencies (this depends extremely on the internals). The absorption mufflers don't filter low frequencies and start to dampen in mid range frequency and start than to dampen more with higher frequency.
I don't know how much space there is with you current exhaust routing, but some additional glasspacks could help (use the thrush). It will also smoothen the exhaust tone, I'm not sure if you will like that.
That is just the exhaust tone and loudness.
If you have a drone/boom of the body, you can play with additional hangers. E.g. put the additional hangers to the transmission crossmember. A flex pipe in front of the transmission crossmember could also help, but this will be to difficult in your case, i would think.
The dumped exhaust will lead IMO to excitation of the body in this area around the tail pipe. dampening material (with high mass and alu finisihng surface) om the body will help to prevent the boom noise. I would but this staff on under the rear seat bank and under the trunk carpet.
Can you tell if it is only at some RPMs when it is to loud?!