400 to spend on Dio clone upgrade?

[Wheelman-111]

Greetings:

Quoth Epschoenly:

I suspected that a 26 would seem to be limiting,

I'm not so sure you can draw any conclusions from the diameter of the headpipe. By that yardstick, since it has a bigger header diameter, the Hot Surfaces exhaust should be more of a top-end pipe than the PG Long. For sure it isn't. There is a lot more to a pipe's performance characteristics than the initial diameter of the hole in the flange.

That said, the PG is among the best performing of the "affordable" exhausts I've seen. I have not tried it, but I'd be surprised if the one in the JW kit even comes close. VT can ship you the PG Long for about $150 or so last time I asked. Worth every penny if you axt me.

[Epschoenly]

I suppose I am simplifying a bit, I am used to looking at expansion chambers, these muffler type pipes are different, and since they all essentially look the same it is hard for me to ge them all straight.

I suppose I'll go ahead and ask why more people are t running expansion chambers? Although I imagine the muffler still acts a bit as an expansion chamber.

Also which Pg pipe are you referring to?

[eliteguy50]

I suppose I am simplifying a bit, I am used to looking at expansion chambers, these muffler type pipes are different, and since they all essentially look the same it is hard for me to ge them all straight.

I suppose I'll go ahead and ask why more people are t running expansion chambers? Although I imagine the muffler still acts a bit as an expansion chamber.

Also which Pg pipe are you referring to?

I run the sectional J type pipe because I want the pull to start right at the bottom end and I don't need to scream out at 10k+ RPMs. The PG (Phongeer Long exhaust) runs similar to an expansion chamber for power band RPM's but not as loud as some expansion chamber pipes.