Easy SE Pro II exhaust baffle mod (with pics)

Turbota · #1 18th January 2005

I pulled the baffles out of my SE Pro II mufflers today. The below pic is one of the baffles. The exhaust inlet to the baffle is at the top of the picture. You can see that indented section towards the top of the baffle ... The way it's cut and bent, about 80% of the exhaust gas goes to the outside of the baffle (the area you can see). Then it has to go down through the small holes and back into the center area of the baffle and then the out the muffler.

The other 20% of the exhaust can go straight though the center area of the baffle without any restriction (that indented area is not crushed closed completely)

Here I drillled 1/2 of the holes so you can see the difference in size.

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This picture is a clossup of the holes on the other side of the baffle. I drilled half of these so you can also see the difference in size.

There are a total of 24 holes in each baffle. I drilled all of them. Hopefully, this will give a little better gas flow, increase the sound slightly, but not kill low RPM torque like what happens when the baffles are completely removed.

I sent out the heads and cylinders to Nallin to get Stage 2 headwork and a set of .030" overbore 10.5 to 1 forged "Bathtub Dome" Hurricane pistons. Just thought I may need a little less restriction in the pipes.

Good Idea? ... Bad Idea?

What ya think,

Ron

jimmyheadgear · #2 18th January 2005

Thanks Turbota

Those are great pic's! I learn better from seeing than from reading.

BlackSkull883 · #3 18th January 2005

I pulled mine out this fall and did the "sportster.org" baffle modification. Basically just pick three of the squares on each one and cut them out with a dremel cutoff wheel. This seems to give it more low end power and the volume level is somewhere between full baffles in and no baffles.

txsporty · #4 18th January 2005

Turbota

What I did with mine was to drill more holes in line all the way to the end of the baffle!! I made the holes the same size as the originals!! Sounds alot better Now!!

So, how did you end up getting them out??

BlackSkull883 · #5 18th January 2005

Take the pipes off and put a tool handle (shovel, rake, hoe etc...) up in the skinny end of them and give it a few taps on the floor. They will loosen right up!

Turbota · #6 18th January 2005

I didn't have a short enough broom handle, so I used a long 1/2" drive extention and beat it out with a hammer. Couple of hard raps, and they fell right out.

willprevale · #7 18th January 2005

Thanks Turbotta. There's a lot of us (myself included) who are more visual than verbal and a pic or two goes a long way making the old adage true.... A picture is worth a thousand words.

I simply lifted the baffle end up about a !/2" for a little throatier sound. They worked fine until one of the damn baffles fell out and none of my buddies has an extra one layin' around.

This has been an unpaid political anouncement sponsored by the comittee to find Will another baffle.

Shark Doctor · #8 18th January 2005

Turbota-

Thanks! Terrific pix (I love close those up shots) and great tips.

scooter · #9 18th January 2005

Turbota,
That's the exact same mod that I did to my SEIIs (before I got my V&H). I thought the sound was a great improvement and got a lot of compliments on how good they sounded. I did notice it let them breathe a little better.

maddog · #10 19th January 2005

I sent out the heads and cylinders to Nallin to get Stage 2 headwork and a set of .030" overbore 10.5 to 1 forged "Bathtub Dome" Hurricane pistons. Just thought I may need a little less restriction in the pipes.

Good Idea? ... Bad Idea?

What ya think,

Ron[/QUOTE]

I'm just curious..You spend a lot of personal time pullin' heads and pistons..You're spending a bunch of bucks on NAllins parts...Yet you waste time and effort drilling out S/E II mufflers for an end result that is basically guess work?
Why not go with proven performance pipes like Rinehart, V&H 2:1, T-Headers, ETC.?