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- Location
- Sydney, Australia
I had the engineer out on Friday t certify the miriad modification to my car so I can drive around the streets and not fear the Police.
He picked a couple of minor easily fixed issues but noted that 104 decibels was too loud for the exhaust. I've been concious of the exhaust since I first had the supercharged engine running and went from straight through 3" mufflers with 3" resonator down to 2 1/2" mufflers and no resonators to soften the noise a little.
The exhaust system is 4 into 1 headers > cat converters > tripple pass 21/2 inch mufflers > up and over the axle and out the back. All piping is 3" mandrell bent.
The resonators were deleted as the monkey who built the exhaust arranged them so they would hit the rear diff housing went the suspension dropped. Good move.
I don't have any cross over or balance pipe on the car.
I need to get rid of 8 decibels but try and retain the power I have.
I'd thought about reducing the diameter of the pipes after the mufflers to 2 1/2" but I don't feel this will have enough effect.
It would be possible to squeeze another 2 mufflers under the rear of the car but they would only be 200mm (8") long!
I'm happy to instal a balance pipe if that would help.
So everyone knows what I'm dealing with the engine runs 21.5psi boost via a twin screw and is fully built to handle it and when finally tuned should turn out 450-500hp at the wheels. I think I'll die of old age beforre I ever see it but that's what all the experts say.
I'm open to suggestions.
He picked a couple of minor easily fixed issues but noted that 104 decibels was too loud for the exhaust. I've been concious of the exhaust since I first had the supercharged engine running and went from straight through 3" mufflers with 3" resonator down to 2 1/2" mufflers and no resonators to soften the noise a little.
The exhaust system is 4 into 1 headers > cat converters > tripple pass 21/2 inch mufflers > up and over the axle and out the back. All piping is 3" mandrell bent.
The resonators were deleted as the monkey who built the exhaust arranged them so they would hit the rear diff housing went the suspension dropped. Good move.
I don't have any cross over or balance pipe on the car.
I need to get rid of 8 decibels but try and retain the power I have.
I'd thought about reducing the diameter of the pipes after the mufflers to 2 1/2" but I don't feel this will have enough effect.
It would be possible to squeeze another 2 mufflers under the rear of the car but they would only be 200mm (8") long!
I'm happy to instal a balance pipe if that would help.
So everyone knows what I'm dealing with the engine runs 21.5psi boost via a twin screw and is fully built to handle it and when finally tuned should turn out 450-500hp at the wheels. I think I'll die of old age beforre I ever see it but that's what all the experts say.
I'm open to suggestions.