Increased performance ?..

Granted, I have the short shots so I don't think performance will increase by much if at all..

 

I'm no expert but I don't see how they could not increase performance; if lollipops give you some of the low end torque back, these baffles have to do so as well.

 

Didnt see any increase in performance. The exhaust tone got deeper as expected and sounds much better.

 

Put quite baffles in my V&H slip-ons and hate them way too quiet at idle

 

I'm not sure how you define "too quiet" but I have a SPL meter and measured my V&H Straight Shots with quiet baffles. At 10' right behind the bike I measured a constant 98db (at idle) with peaks at 103db. I also measured 15' in front of the bike it was 89db with peaks at 94db. The quiet baffle is about 3db average (2db-4db) less across the band than the stock baffle.

I don't notice a performance difference using the quiet baffle compared to the stock baffle.

 

They're not too quiet on mine either. I ended up cramming 2 of the old fashioned baffles, (the ones with the can opener holes), right up the middle till they stuck fast and it toned them down a bit.

 

>> The quiet baffle is about 3db average (2db-4db) less across the band than the stock baffle.

If I'm correct, that's about 30% reduction in volume? That would make a difference for me...want loud but not super loud.

 

Volume in terms of sound intensity? If you're talking sound intensity 98dB is about 6.31E-3 W/m^2 whereas 95dB is about 3.16E-3 W/m^2. That's about 50% of the original intensity. That being said, I have the Q-Series V&H and I much prefer the deep to the loud.

 

Yes, sound intensity. The power required for treble and the power required for bass are different, I kinda understand that. After reading a bunch of posts that I don't truly understand, the VH quiet baffles do do something nice...they make your ears bleed less and add to the thump while being overall quieter?

I need to buy a sound meter or I'm never going to understand this stuff.

 

Well, the sound intensity is just a measure of the energy over an area. The perceived loudness has a lot to do with the frequency of the sound. It's measured in a unit called phon (which is not an SI unit and isn't widely accepted). You can google equal-loudness contour and find lots of charts.

In my experience it is exactly that, less ear bleed and more rumble.

Edit: Here is one: