Yes you will notice a difference and I think thats a perfect alternative to using a baffle. I wish I would have had that idea before I spent 80 bucks on baffles that basically do the same thing. The sound will quite down only slightly. What you will notice is the high notes in the exhaust (the ones that really damage your ears) will be gone. You will also notice that the jake bake sound on decel and between shifts will be greatly reduced if not gone. You can place them anywhere in the pipes you want, but looking at your picture, I'd put them as deep as you can in your tips. Most baffle manufacturers recommend installing them around 6 inches into the pipe.

 

Hello, I searched for this but came up short, so I figured I'll start a new post on it...


Anyway, I just slapped on new pipes (thanks Midnight Run!) and at first I was going to put baffles in them to quiet them down, thinking they were too loud.


I've since changed my mind about the nois, but I still wanted some back pressure. Some guy at the shop I work at made these for me and told me to try them out:

I've read up on them online, and supposidly they were once used for straight pipes.


My questions are:


1) Will I notice a difference with using these?


2) How will the sound change (if at all)?


3) Has anyone here done something similar?


4) How far should I put them in my pipes (see pic of my exhaust)

YOU HAVE THEM IN YOUR HAND.................. put them in and find out

 

How big are the washers relative to the size of the pipe's diameter? Also, would I be correct in thinking that changing the angle the washers are installed (fully perpendicular to anything short of parallel) will change their effect on backpressure, torque, noise, etc?

 

Yes that is correct, they just need to be relatively the same angle.


This is an old racing trick that works great in most cases. The only time I did this it was amazing how much effect it had. I was told to mount themboth uniformly angled 1" from the end of the pipe with the bolt sticking down but some guys smartlypointedthe bolt toward the frame and down,which hides itbetter. Remember to put some never-sieze on the threads, you'll mess around with it for awhile at first. There is no risk to installing them, they remove easily. You can also use a 1" stack of steel washers under a nut and bolt for backpressure but this solution is far more easily adjustable.

Also, would I be correct in thinking that changing the angle the washers are installed (fully perpendicular to anything short of parallel) will change their effect on backpressure, torque, noise, etc?

 

I did something like this with a pair of Bub Chambermaids w/baffles that I had. I just put in longer baffle bolts and stacked nuts to fill up the shank. Noticed that the real sharp bark was gone as soon as I fired her up. I also noticed that it had more bottom end torque and felt stronger. One thing I also noticed was that it didn't rev quite as fast (may have been my mind tricking me) and didn't drop rpms as fast either. Mine was a quick $2 total for the change and could be put back in about 5 minutes. Go for it and maybe you should start making these for people if they work good.

 

How big are the washers relative to the size of the pipe's diameter? Also, would I be correct in thinking that changing the angle the washers are installed (fully perpendicular to anything short of parallel) will change their effect on backpressure, torque, noise, etc?

They are 1" washers and my pipes are 2.5" in diameter (maybe I should try bigger washers?)

I was a little iffy about drilling holes in my pipes but now I'm really curious as to what kind of changes these little babbies can do!

I'll post back after I put'em in...

Go for
it and maybe you should start making these for people if they work good.

Yeah, Edders City Baffles, only $50 per washer!

 

I did a DIY Exhaust Mod and used 3" exhaust pipe with a Volkswagon Stinger exhaust baffle measuring at 2 " 7/8.Give me your email and i'll send you a pic. Sound you ask? Fricken awesome and crisp. Sounds like a Ducati 996 with BALLS! How far? 1/4" in from the low side of your angled cut.

 

...maybe you should start making these for people if they work good.

They were put out commercialy in the 60s. The were called Snuff-or-Not. They did work quite well. Here a couple of pics of them. One open and the other closed.

http://null/exhaust4_snuff1.JPG


http://null/exhaust4_snuff2.JPG

 

I haven't seen this is years. They worked okay on the old small-cube bikes back when the factory didn't care much about fine tuning. But these modern well-tuned big cube monsters would run likeplugged with a potato

. Come to think of it,I don't know any bikes back then that even ran with these closed, do you OldMan?


[added] Hey, look what I found! http://www.dansmc.com/Exhaust_4.htm

They were put out commercialy in the 60s. The were called Snuff-or-Not. They did work quite well. Here a couple of pics of them. One open and the other closed.

 

wanted to share this utube link as it applies to the "butterfly" baffle solution being discussed here. The link provides some "real time" testing so you can hear the sound diffs. just thought this might help;

I haven't seen this is years. They worked okay on the old small-cube bikes back when the factory didn't care much about fine tuning. But these modern well-tuned big cube monsters would run likeplugged with a potato

. Come to think of it,I don't know any bikes back then that even ran with these closed, do you OldMan?


[added] Hey, look what I found! Dan's Motorcycle "Four Stroke Exhaust Pipes"

 

I did a DIY Exhaust Mod and used 3" exhaust pipe with a Volkswagon Stinger exhaust baffle measuring at 2 " 7/8.Give me your email and i'll send you a pic. Sound you ask? Fricken awesome and crisp. Sounds like a Ducati 996 with BALLS! How far? 1/4" in from the low side of your angled cut.

You should put a picture of this on your profile in your gallery. It's always nice to see some ingenuity. Injektor back off...the guy is here asking questions wondering if anyone else has done it, and what their results may be...you don't have to jump on his @$$ and treat him like an idiot. He got some good feedback that he might not have gotten if he didn't post this thread...if we give people a hard time about asking questions then the purpose behind this forum is gone. Seems like more and more your giving someone a hard time...I can't tell whether your jokin or just bein an @$$. I'm not tryin to be a ***, it just get's old.

 

Thanks for all the imput guys, and thanks Terry for watchin out. I
don't know if Injektor was joking or not either, but on forums like
this I always give people the benefit of the doubt. Peace and love!

I did a DIY Exhaust Mod and used 3" exhaust pipe with a Volkswagon Stinger exhaust baffle measuring at 2 " 7/8.Give me your email and i'll send you a pic. Sound you ask? Fricken awesome and crisp. Sounds like a Ducati 996 with BALLS! How far? 1/4" in from the low side of your angled cut.

Email me or just post em in the gallery for everyone! 1/4" you say? I guess I could, since they point down people wouldn't see them anyway.

 

Anytime- I've just noticed an influx of negativity from a lot of people on the forum and it has ran off A LOT of the older members. People who have some very good experience and knowledge with these bikes. Their input on topics is invaluable and without them this forum wouldn't be half of what it is. This forum is by far the best forum on the web that I've ever experienced and I'd hope that we can all help to keep it that way. Their is no room for being negative to eachother..if you think someone has a stupid idea then just keep your mouth shut and move on to the next post....it's not hard. I don't agree with a lot of things that come thru these threads but I read them and either comment or not...it's not hard.

 

I haven't seen this is years. They worked okay on the old small-cube bikes back when the factory didn't care much about fine tuning. But these modern well-tuned big cube monsters would run likeplugged with a potato

. Come to think of it,I don't know any bikes back then that even ran with these closed, do you OldMan?


I would reach down andturn them almost closed if I saw a LEO. Other than that, they were always straight.


[added] Hey, look what I found! http://www.dansmc.com/Exhaust_4.htm


Yep, that's where I got the pics from. I was looking to see if I could find any info on them at all cuz I haven't heard anything about them since way back when.

 

Butterfly' baffleshave been around longer than me. Here's some info that will get you up to speed.


http://rswarrior.com/forums/p/19617/313686.aspx#313686


http://rswarrior.com/forums/p/23183/348592.aspx#348592


http://rswarrior.com/forums/p/26154/379735.aspx#379735


http://rswarrior.com/forums/p/17028/287501.aspx#287501

 

Nice thing was the VW baffle only cost my $8.00. The I.D. of the VW baffle matched stock pipe I.D. which made for an easy fabrication.

Here's a pic:

 

How big are the washers relative to the size of the pipe's diameter? Also, would I be correct in thinking that changing the angle the washers are installed (fully perpendicular to anything short of parallel) will change their effect on back pressure, torque, noise, etc?

They are 1" washers and my pipes are 2.5" in diameter (maybe I should try bigger washers?)


I was a little iffy about drilling holes in my pipes but now I'm really curious as to what kind of changes these little babbies can do!


I'll post back after I put'em in...

Go for it and maybe you should start making these for people if they work good.

Yeah, Edders City Baffles, only $50 per washer!

You're right. These are essentially the same thing as the Big City Thunder offering except they come with the welded washer & post encased in a tube. You will see results....good results. The results I had when installed in open Samson Ripsaws are gained torque, slightly less ear piercing sound at wide open and the decel jake brake effect went away.

 

I live in a condo, so I have to find a friend with a garage to do my thing. Tomorrow I believe I have the time and place to pop these babies in.

I'll report back when it's done!

 

Nice thing was the VW baffle only cost my $8.00. The I.D. of the VW baffle matched stock pipe I.D. which made for an easy fabrication.

Here's a pic:

Nice job! You're like MacGyver!

 

Interesting idea.....

 

I just installed the monsters on my ripsaws. I'm going to ride today and see what it's like. I'll try to post tonight or tomorrow with my 2 cents

 

Big City Thunder says to install their baffles 12"-16" from the end of the tail pipe (in the last straight section of pipe), for maximum benefit. The closer to the end of the pipe you go, the more low end torque you lose.


I love the Thunder Monster Baffle in my Pro Pipe. It sounds like an open pipe at full throttle, has a deep tone, and is somewhat quiet at idle. The low end torque is awesome!

 

Yes you will notice a difference and I think thats a perfect alternative to using a baffle. I wish I would have had that idea before I spent 80 bucks on baffles that basically do the same thing. The sound will quite down only slightly. What you will notice is the high notes in the exhaust (the ones that really damage your ears) will be gone. You will also notice that the jake bake sound on decel and between shifts will be greatly reduced if not gone. You can place them anywhere in the pipes you want, but looking at your picture, I'd put them as deep as you can in your tips. Most baffle manufacturers recommend installing them around 6 inches into the pipe.

The difference between the Thunder Monster baffles and the "lollipop" washer is that the complete baffle actually makes the pipe a bit smaller and will actually give you a bit more back-pressure than just the washer which is a good thing. Also the diameter of the "lollipop" and the hole are precise in the Thunder Monsters due to the research and development that went into the product. That's not saying these won't work, because they should and the results should be noticeable.

 

Big City Thunder says to install their baffles 12"-16" from the end of the tail pipe (in the last straight section of pipe), for maximum benefit. The closer to the end of the pipe you go, the more low end torque you lose.


I love the Thunder Monster Baffle in my Pro Pipe. It sounds like an open pipe at full throttle, has a deep tone, and is somewhat quiet at idle. The low end torque is awesome!

Well, I couldn't put them in this week, so next weekend's the new time to install them. If it is true about putting them farther in to increase low-end, I think I'll go deeper than what I was originally going to do.



I may also weld up new ones with a bigger washer on the ends...

 

Big City Thunder says to install their baffles 12"-16" from the end of the tail pipe (in the last straight section of pipe), for maximum benefit. The closer to the end of the pipe you go, the more low end torque you lose.


I love the Thunder Monster Baffle in my Pro Pipe. It sounds like an open pipe at full throttle, has a deep tone, and is somewhat quiet at idle. The low end torque is awesome!

Well, I couldn't put them in this week, so next weekend's the new time to install them. If it is true about putting them farther in to increase low-end, I think I'll go deeper than what I was originally going to do.





I may also weld up new ones with a bigger washer on the ends...

That is what Big City Thunder told me on the phone. It works great in my bike. If you're going to weld up new ones, why don't you get two 4" long pieces of s/s pipe that fit the insides of your pipes, and weld a stem (1/4" rod) and a small washer to them, at one end of the pipe, so that the washer is centered in the opening. Drill a 1/4" hole about 1" in from the other end, and thread it, or weld a nut to the inside of the pipe. Presto!! You've got Thunder Monster Baffles!! Now drill a 1/4" hole through your pipes, and slide the baffle in, and bolt it in place with a button head allen bolt.


I wouldn't make the washers bigger than what you have shown. The whole point is to create some turbulance, not to block off the exhaust.

 

Rode all day. Deeper tone, less high tone, no more jake on decel. Not too sure about the torque, I am in need of a map to appreciate that I think.