Diamater of interior piping

[Nuage420b]

does any one know what the diameter of the exhausts interior piping is? and can anyone tell me what the distance is from wall to wall of the center chamber? guesstimating from the outside of the pipe it looks like 16-17inchs? Ignore the arrows, stole this crom captron's post

 

[Nuage420b]

So here is my exhaust plan. . .Cut off the end. Do not cut open the top. Stuff the middle pipe with as much steel wool as I can to seal it off. Close the middle hole. Then fit two tips into the holes and weld them into place. leave the exhaust valve functioning in hopes that it will not completely kill my low end power, but when the valve opens it will be two screaming straight pipes? Minimal work, and if it fails i still have the option of opening it up from the top and removing the piping?

 

[Pockets]

Interesting idea. So the right side tip will only function as an exhaust if the valve is open and the left will still be primary.

 

[Paniller]

You're going to end up with a straight pipe all the time, then 2 straight pipes when the valve opens. Too loud, if you ask me.

However, if the first pipe is perforated, I'd like the idea. Big resonated chamber for low throttle, then opens to a straight pipe.

 

[Nuage420b]

Paniller yes I agree with preferating the first pipe, my buddy and I were just talikng about that, my one concern is the middle piping. Not sure how it will affect flow. I guess I shall find out. Will post pics hope to get this done this weekend.

 

[Nuage420b]

and as far as loud. . . or tone, it could sound like a dog queef for all i care. i'm seeking performance first.

 

[lawdog]

I am doing something similar but using 2 inch Rush baffles. The muffler is at the welder right now but from what I remember (aka I may be off a little) the left pipe was around 1 7/8, middle pipe around 2, and right pipe around 1 3/4. Problems I see is if u pack the center pipe the packing is just going 2 fall out the front, get blown around, and not do much good. If u just use the left pipe it is solid and will be very loud and basically a straight pipe. The right pipe had about 6 small holes in the center. The inner chamber was about 12.75 in long. If u r going ur route i would at least stick a dremel and wheel and grind some slots in the left pipe for the exhaust 2 go into the middle chamber 2 quiet it down a little. I would also weld in a small washer in the left straight pipe to help with torque. Give me a couple days and i will post up my muffler.

 

[Warlock]

Whats a dog queef sound like? lol

 

[lawdog]

I would just weld a plate on the rear of the center pipe and forget it. Dont worry about packing it just weld it shut and the exhaust wont flow out it from the front chamber. I would say cut off the end cap, weld a plate over the center hole, and weld on some turndowns. If u lose torque weld in a small washer in the left pipe 2 reduce flow. If its too loud open the center section, drill some holes into the left and right pipes the wrap packing around them. I can ship some 2 u cheap as I got a whole bunch extra left over from my muffler.

 

[Nuage420b]

Thanks Lawdog. Yea i was just thinking about how to seal off that middle pipe with out cutting open the top. We'll see what happens. Lemme know how yours turns out as far as torque. It sounds like we both are on the same page as far as the design.
Warlock: Something like this. goto 30 seconds

 

[lawdog]

If all goes well I will pick it up from the welder and throw it on this weekend. I am so stoked and can't wait. Once I get it done I will give u the full report. I also have a K&N and OSB tuning software so it should run great. Right now it wheelies no problem in 1st and 2nd so I imagine with the exhaust I should b able 2 wheelie in 3rd now! Lol!

 

[browland]

Nuage dude wtf I wont be able to keep a straight face for the rest of the week

 

[Pockets]

I don't know whether to laugh or puke. I just ate.

 

[Nuage420b]

I wonder if she could blow bubbles?

 

[07Bolt]

wtf, i could smell it

she farted the camera & stuck in the cats face

and the cat sniffed it

bbbblllaaahhhhhh

 

[Nuage420b]

wasn;t a far.

Lawdog, I've been contemplating where to weld in the washer. I'm thinking of doing it at the end of the tip i will be inserting into the stock piping. when inside that would place it about 3 inches into the exhaust. the ID of the tips im using is 1 and 3/4's how large or small should i have the hole of the washer? just whatever size it comes with or should i grind out the middle a bit?

 

[Nuage420b]

Here is where im going to weld it and then insert it into the preexisting pipes and weld it into place. that way the washer is a few inches inside. Should i go with a small or big hole?

 

[lawdog]

I honestly can't answer that because every engine is different. What my bike may like with my fuel maps will be different then your bike and your fuel maps. Too many variables and without a dyno you and I are guessing. To rough guess I would start with the larger hole for more flow.

You could also go with a lolipop style or thumbscrew. Something like this that has adjustability to it.

That way you can tune it to find the sweet spot. Otherwise you are guessing as to what size washer will work the best.

Don't forget a good tune to. Thats critical in my opinion.

I stopped by the welder today and he should have it done tonight. (crosses fingers!)
Brett

 

[konarider94]

ive seen dr dyno in massachusetts or connecticut use washers. he welds a bolt stud to them and drills a hole in the bottom of the pipe and then you can adjust the angle just like the link lawdog posted. Ive seen him perform magic on harleys. From what i saw him use id say use the big hole.