S&S 126" Dyna build.

[build it]

Sounds like a "potty mouth! "cat. It's pretty unreal how quiet the trap can will make a large header.

Merc, do you know what your MCSA is presently?

Potty mouth should've been kittycat.

MCSA is minimum cross sectional area.

[Merc63]

Not sure what that is?

[pwmorris]

Merc,
I really like the sound for riding on the street with the cap removed-still strong sounding but nowhere near as loud for a daily driver.
Lets hope it makes the HP up top then you have a winner.
I think it's quieter than my Guppy meg with baffle, which still is pretty loud-more raspy. Without the baffle, it's IMO too loud to drive around town on a daily basis like yours was with the Burns.
I would be interested to see what Burns sounds like with their baffle-never heard one. I didn't even know they made a baffle meg.
As you may know, I simply remove the baffle for track days, adjust jetting, and I'm good to go. Get home, baffle goes in, re jet, and I'm hitting the town.

[jam65]

Paul, I have the baffle in my Burns pipe that is like stainless steel wool. It is loud by most standards but people who have ridden behind me say that it's not that bad. I offered to ride in the back of the group so....
  There is a video/sound of my pipe in the dyno section.

[Merc63]

Called Hpi today snd they actually make a 1 inch spacer for only the 62mm TB.  Got one ordered, shoukd be here in a few days.

[Merc63]

Super trapp doesn't even make a open end cap for the SC 5 inch muffler. 

I think I'll try it with no discs or cap and maybe try washers between the 24 discs and closed end cap and compare Dyno sheets when the time comes.

[pwmorris]

Paul, I have the baffle in my Burns pipe that is like stainless steel wool. It is loud by most standards but people who have ridden behind me say that it's not that bad. I offered to ride in the back of the group so....
  There is a video/sound of my pipe in the dyno section.

I think I found it-Nice sound.
Jay's 117 burns pipe
Not too loud really-only kissed the throttle a little but still didn't sound too crazy.
When you say steel wool, is it packed in some kind of tube?
Here's the Guppy baffle-This is the old version and I think they made some improvements on it but I don't have the new version.

[Merc63]

Whats the diameter through the baffle?

[jam65]

It's 3 inches through the baffle and has loose scrubble packed inside the can.

[attachment removed after 60 days by system]

[pwmorris]

Whats the diameter through the baffle?

Mine is 2" thru the center of the baffle but does also allow flow around the baffle as well.
! Private video

[John/1]

Super trapp doesn't even make a open end cap for the SC 5 inch muffler. 

I think I'll try it with no discs or cap and maybe try washers between the 24 discs and closed end cap and compare Dyno sheets when the time comes.

5" open end caps at sumit racing

[attachment removed after 60 days by system]

[Merc63]

First run of the night, did a 11.0 at 122mph.

airs nice and cool and will get better, DA is 3200ft.

1.79 60 ft. Got some work to do on my launch.

[Merc63]

I could not for the life of me beat my first run at 11.0.  Maybe I started launching too hard, it kept wanting to wheelie.

Highlight of the night was watching a guy on a BMW s1000rr and his buddy on a Yamaha r6 laughing at the old Harley sitting beside them.  Second or third run I was lined up with the BMW and gave him a beating, not by much but a win none the less!  Next run was his buddy who I walked on by agood half a second or more.


The BMW if you don't know has 190+HP crank and weighs 450lbs.  Just looked up the stats and it's supposed to run 1/4 mile: 9.57 sec @ 251 km/h (156 mph)..  He was only doing 11.15s or so at 132mph with a 2.0 60ft.   

Those stats on the BMW and what it was running at this track show ya that my 11.0 is pretty impressive for a harley.  I still haven't had Time o put the bike on a Dyno either yet too. 


I'm doing half a second faster than my old 120" so I am pretty happy with the performance of this 126"now.

[sfmichael]

 

[strokerjlk]

I'm doing half a second faster than my old 120" so I am pretty happy with the performance of this 126"now.

good to see merc

[rob71458]

Highlight of the night was watching a guy on a BMW s1000rr and his buddy on a Yamaha r6 laughing at the old Harley sitting beside them.  Second or third run I was lined up with the BMW and gave him a beating, not by much but a win none the less!  Next run was his buddy who I walked on by agood half a second or more.

I love it!

[mr_natural78]

that's awesome! congrats on a killer build. sounds like a blast to ride.

[Merc63]

Next step is to hit the Dyno and set the timing and get rid of these ugly boat anchor wheels.  Literally the rear wheel and tire weighs 50lbs+.

Thanks for the comments guys.

[pwmorris]

Great job,
You are finally getting a taste of Star Racing power!
There's alot more there-It's a 10 second bike all day with practice, and how good you get at launching it and how much you tweak the rest of the bike will dictate how deep in the 10's you go-