R6 Message Net banner

To those with Devil exhausts

3K views 18 replies 11 participants last post by  Azr6  
#1 ·
I was recently at a bike night and i noticed a few sportbikes with CF Devil SB2 HM and all but one (and mine) had the inner "baffle" (correct term?) removed so it didnt look like an inner exit pipe in the exit of the exhaust can, that mines does...

How does one do this? is it worth it from a sound standpoint or hp performance? Is it worth it.... i didnt get to hear any of these bikes leave so i didnt get to hear them. :(
 
#6 ·
If you are talking about the actual baffel and packing material being removed ...

On a CF canister, I would advise against running it w/o out the inner baffle/canister packing.

Other canisters I would say whatever floats your boat - but it may take away from the power.

Ok ... your saying why not remove them on a CF can?
Simply put - you are going to increase the heat the CF is exposed to and when CF is exposed to extremly high heat (ie exhaust gases) for an extended time it deteriorates and can even burn.

That mid pipe is f'n hot right?
Thats the heat that the can will be directly exposed to.
Normally the packing insulates the sleeve from the heat to a degree - and the CF disipates heat well enough that heat does not have a chance to build up when insluated and cooled by the outside air flow.

That is why almost all manufacturers suggest not running a CF can when tuning on a dyno.
Due to not having enough fresh/cool air flowing over the can to keep it cool.


BTW - I have a CF can on my bike.
So I am not saying anything bad about CF cans.
Just that it helps to know what CF considers friendly and not friendly.

Anyway - hope that helps :thumbup
 
#7 ·
ranman said:
If you are talking about the actual baffel and packing material being removed ...

On a CF canister, I would advise against running it w/o out the inner baffle/canister packing.

Other canisters I would say whatever floats your boat - but it may take away from the power.

Ok ... your saying why not remove them on a CF can?
Simply put - you are going to increase the heat the CF is exposed to and when CF is exposed to extremly high heat (ie exhaust gases) for an extended time it deteriorates and can even burn.

That mid pipe is f'n hot right?
Thats the heat that the can will be directly exposed to.
Normally the packing insulates the sleeve from the heat to a degree - and the CF disipates heat well enough that heat does not have a chance to build up when insluated and cooled by the outside air flow.

That is why almost all manufacturers suggest not running a CF can when tuning on a dyno.
Due to not having enough fresh/cool air flowing over the can to keep it cool.


BTW - I have a CF can on my bike.
So I am not saying anything bad about CF cans.
Just that it helps to know what CF considers friendly and not friendly.

Anyway - hope that helps :thumbup
The thing is....my pipe never came with the little inner baffle. I think thats why he is asking because I dont think it would be easily removable on the sb2 cans.
 
#9 ·
yeah i know exactly what hes talking about...i've seen it. The regular SB2 has a reducer in it that looks similar to stock...but the outer diameter is still large. Mine has no reducer...in fact i am not sure what the whol deal with them is...but what you may need to do is replace the whole inner baffle with the regular one (involves grinding off the rivets and re-riveting) or just removing the reducer if possible. Either way the rivets need to be ground off to take a look inside.
 
#12 ·
Ok I see what you are saying. I did a search for SB2 pics and found the following pics that show what I think it is you are talking about. In one of the places I found the pic they said it was a noise reducer. Since I am not an expert at that I can not tell you if it is infact a noise reducer.

The Devil's I have seen are just like yours so I would not worry about it. As far as losing HP, I wouldn't sweat it, the slip-on isn't adding that much HP so with it or without it you should not really feel a huge difference in power IMO. The Devil's I have heard on an R6 (Dnyce's and Netjack's) sound sweet and I believe they are just like yours too.
 

Attachments

#15 ·
Two possible reasons for having reducers like those:

1) They can help with noise reduction
2) They can also help to slightly increase the exhaust back pressure

Removing only those should not hurt a CF can any.
I am only talking about damage to the can.
No opinion on the engine internals, due to the back pressure issue.
That depends on the bike and engine mods, etc.

What I was talking about NOT removing on CF cans was the actual baffle and canister packing material.

IMHO - The baffle referred to is an outer baffle since it is outside of the canister (even though they are inside the canister outlet/endcap).
Or they could even be called a canister outlet/endcap reducer.

Jardine has a optional part for their cans that is called a QMI (Quiet Module Insert).

One more thing: On removing rivets ... best way to remove them, w/o damaging the metal band, is with a drill.

Just my .02 :)
 
#16 ·
I dont know. I know when I bought my pipe it said for race purposes only but I think that comes on lots of aftermarket pipes. I didnt have a choice of picking the pipe with a baffle like that or not but I think the pipes that have that little piece sticking out look stupid.