To answer your original question: Do slip on cans really give more power?
I know your talking about C-14's and I'm bringing a C-10 into the discussion,,,, but it does partially answer your question.
So, here is my 2 cents (done on a 2003 C-10).
You want to do a run to compare bikes with different exhausts.
Your results will not be exact as the bikes are different.
To accomplish what you want to see, You have to do base lines on all the bikes in stock condition first and then add slip ons....
I bought a used dyno and did it all in 1 afternoon....
I did 3 series of dyno runs on my C-10.
Same day, same bike, same dyno.
I can post a copy of the results.
Run 1 was with stock muffler.
Run 2 was with Cobra F1s.
Run 3 was stock mufflers with baffelectomy.
Will not quote the numbers right now as it would be from memory.
But I will tell you the basic results.
Improvement was not huge, BUT,,,
The Cobras did improve the power curve. (The typical Connie Dip in Mid range was better).
Increased Torque/HP primarily in Mid range and added a bit more on top end.
I was all smiles, then I did a run on the Stockers that had a baffelectomy.
Results were nearly the same as the Cobra's.
Bottom line "seems to be" that decreasing the back pressure (be either method) is what caused the change...
Ride safe, Ted
