Estimating Exhaust Sound Levels

[85rx-7gsl-se]

Our main concern with too much muffling is too much backpressure which I have heard is bad for bridgeport engine longevity.

[vex]

Originally Posted by 85rx-7gsl-se

Our main concern with too much muffling is too much backpressure which I have heard is bad for bridgeport engine longevity.

I can't comment on that as I don't know. I imagine if you have enough muffling devices back pressure can be minimized as the pressure is always going to go down stream. Since the exhaust becomes 'incompressible' the velocity *should* increase at the exit causing the pressure to drop the last little bit.

Let me do some thinking and I'll see what I come up with.

EDIT:

After doing some readings on the average pressure achieved from the exhaust system (of average cars) I do not see how back pressure could affect the car from what I have read and the system I described above. If you have a full length exhaust system already installed you've already hit a significant portion of pack pressure. Adding in the muffling devices shouldn't adversly affect the engine if you use a well flowing type (Periferated stainless steel tube). Switching to a larger diameter exhaust will also reduce back pressure (but will also slow exhaust gas velocity; making it louder).