Hello, my buddy backed out on selling me his 2 in 1 v&h so Iím thinking of removing my packing on my v&h slip ons for a little more aggressive sound. I do have the basic k&n filter and a fuelpak and will retune accordingly but just curious if there is a significant power loss in doing so? I heard something about back pressure but idk.
Plus if anybody has the map for such a procedure i would appreciate if you can send it,....currently on chat but no one is responding, and their email isnít working.
There are already removable baffles in the V&H slip ons - have you removed these ? there is a small allen bolt holiding them in.
These bikes do benefit from a custom tune. I run my V&H slip ons with a custom map done by SEPT that came with the bike. On the standard Harley stage 1 tune it was 111bhp at the wheel, after some tweaking 117bhp. This is about average for a stage 1 bike (exhaust and air filter).
I dont believe there is much to be gained with a 2-1 unless you have further tuning (cams, heads etc) and really its a drag race pipe so works great in a straight line and scrapes on tight right hand corners . The slip ons actually have better ground clearance and dont scrape even when at the edge of the rear tyre.
I would stay with the slip ons and just get your bike custom tuned. Should only take an hour or so dyno time to tweak the map a little.
Usually the increased noise with the packing removed makes the rider short shift the bike to keep their ear from bleeding. If you can ride a Revo often to 9K Rpm with no baffle packing in the pipe you are a wild man - I've got my 2-1 Bub 7, added an automotive BMW 4" C/F clad S-S resonator and its perfect - no earplugs required, full Rpm is fine. it's on an R Model, higher, and never scrapes but on a Muscle I agree with bogie.
H-D Heathen said "(and I'm damn near deaf without my hearing aids anyway.)" That's next for me do they have any hearing aids that stop tinnitus ? Too many Jets daily in my ears after too many years racing off road before I used earplugs so my friggin' ears ring all the time. I've found what I think is the right sound for a Revo though with my 2-1 pipe and 4" resonator with a 2.5" reducer out the back -its straight through but lighter and has a great cadence. I think a 2-1 like a V&H or Bub 7 like mine with a V&H " Pro pipe " from a big H-D twin grafted on it would be possibly better and easier. The step-up to a larger diameter slows the exiting gasses and lowers the tone. The Muscle setup has a great sound and flows well, length of pipe is good for back pressure, and low end power. Short 2-1 open pipes are IMHO annoying for rider, pax, surrounding traffic, & loses rideable tq & power. Take 'em to the drag strip that's where they shine. Stuff a Db reducer in it and power drops so it takes a longer pipe or dual exit to get flow with backpressure, proper cadence and keep the tone lower. I wouldn't take the packing out of any muffler, and I dont see any possible measureable positive benefit from doing it, unless you're putting stainless steel packing back in so it doesn't blow out and get louder like fiberglass packing does.