Jaz wrote:I'm not sure you understood my post. What is listed above is what I had in my old RS Liberty which was one of the quietest RSs in Brisbane. I took pride in that. The other thng that helped it is that it also had 2.5" from the rear diff back.
The TCP system is definitely quieter on the motorway, and there is no appreciable drone at all.
Yep understood your post, my point being your new TCP system would want to be quieter than a system you outlined above. One Resonator and "the biggest straight through muffler I could find" would be a noisy system. The bigger the pipe diametre the louder she gets. The biggest you could find = 3.5-4"?
Now I see you actually reduced to 2.5" from the rear back which contradicts the "biggest I could find" description. Or are you talking Barrel size and not pipe dia? Even then barrel size will not neccesarily mean a certain dB. depends on packing and perforations etc Pipe size plays a far bigger part
2.5" is much more likely to be a quiet car as you well have pointed out
as I mentioned - many others have shut them up effectively by using much smaller diametre pipes on the rear muffs (2") without compromising flow to the point of losing HP.
I digress -proof is in the pudding so keen to test