which exhaust?
09-13-2007, 08:15 AM
#21
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Here are a couple of video's I did today, not the best quality but it gives you a rough idea of sound, I could live with this 70RS exhaust as a daily driver if it was my daily drive.
Camera man had a touch of the shakes.
Driving off.
http://www.youtube.com/watch?v=8qbL9-zlrnM
Flyby.
http://www.youtube.com/watch?v=ISGkLq3fG7s
In car driving off.
http://www.youtube.com/watch?v=cxDVNPC1wFc
Long in car drive.
http://www.youtube.com/watch?v=8swbE-qelEM
Camera man had a touch of the shakes.
Driving off.
http://www.youtube.com/watch?v=8qbL9-zlrnM
Flyby.
http://www.youtube.com/watch?v=ISGkLq3fG7s
In car driving off.
http://www.youtube.com/watch?v=cxDVNPC1wFc
Long in car drive.
http://www.youtube.com/watch?v=8swbE-qelEM
09-23-2007, 04:56 PM
#25
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Originally Posted by markS2kcU,Sep 9 2007, 03:34 PM
And as a bonus I picked up over .5psi just by swapping it over from a Mugen on my SC seup.
If you put a new exhaust on the car and you gained PSI then I would think you've just added additional backpressure to the system........
09-24-2007, 08:05 AM
#27
Originally Posted by AP1_S2k,Sep 6 2007, 09:16 PM
diamater does effect loudness and wwight has very little to do with loudness. A 70mm is going to be much louder then a 60mm or 63mm. The main thing is to see if the exhaust is resonated or not. Like I said above teh 70rr is VERY loud but thats because it is 70mm with no resonator and is a header back so there is no cat either. The 70rs to me is good for a DD but is still on the loud side. The 60rs is not loud at all. It is actually pretty quiet
Another issue to consider is drone which is caused by bad design and not weight, or mufflers although a resonator can help if it is designed with the system properly.
Resonators only reduce total loudness a little. They mostly remove the raspiness and change the resonance point.
09-24-2007, 01:16 PM
#28
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Originally Posted by deathsled,Sep 23 2007, 04:56 PM
this kind of stuff is really surprising for me to see. If you put on an exhaust and your boost pressure rises then that would mean you've added a restriction to the overall system wouldnt it? Boost pressure is nothing but resistance to flow through the engine. Opening up the intake and exhaust paths should lower boost with no other changes, allowing you to make more power at lower boost levels.
If you put a new exhaust on the car and you gained PSI then I would think you've just added additional backpressure to the system........
If you put a new exhaust on the car and you gained PSI then I would think you've just added additional backpressure to the system........
also, better flowing would be less back pressure.
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