Exhaust Modification
- Thread starter jimbo
- Start date
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Jimbo there are various way you can modify your standard pipes to get this result. I know a few members have done it and I am sure one will come along and give you some great advice on what is best here
Fuel and exhaust systems work in concert. If you modify one you generally have to modify the other.
I know it was common to remove baffles and change jets in the carb equipped bikes to get a rumble, but now that we have EFI bikes I would be careful and work with the dealer or other expert tuner on the best setup.
I know it was common to remove baffles and change jets in the carb equipped bikes to get a rumble, but now that we have EFI bikes I would be careful and work with the dealer or other expert tuner on the best setup.
I installed 60's era silencers on my 03 T100. I put baffles in the header pipes just in front of the silencers. I got the baffles from JC Whitney. Here are three sources for after market pipes. You can find 60's or 70's style silencers.
http://www.bellacorse.com/
http://www.newbonneville.com/
http://www.emgo.com/
If you have questions, the guys BellaCorse and New Triumph Bonneville are very helpful. Each of them owns modern Bonnevilles and they are avid riders. I have met and ridden with both of them.
If you install aftermarket pipes (freerer flowing), you will need to install or have your dealer install the Arrow map. You can then fine tune it from there or take take it to a shop and have it tuned.
http://www.bellacorse.com/
http://www.newbonneville.com/
http://www.emgo.com/
If you have questions, the guys BellaCorse and New Triumph Bonneville are very helpful. Each of them owns modern Bonnevilles and they are avid riders. I have met and ridden with both of them.
If you install aftermarket pipes (freerer flowing), you will need to install or have your dealer install the Arrow map. You can then fine tune it from there or take take it to a shop and have it tuned.
You are very welcome.
cheekygreeky
Member
Jimbo, I have performed a bafflectomy on my 2012 scrambler , if you YouTube bafflectomy you will find a few that have done this.....And after this I did a 20 min tune, it wild I tell you and I saved $ 1200.00..if you would like mor to detail just let me know
jimbo
Member
Cheeky,
Please tell me more!!! I have my first service app. in about a week, and I suppose I should wait till then before I do anything radical (that is, what they won't approve of) to my Bonneville, but I really do want to improve at least the sound of it for now.
So what ever you suggest will be a help to me.
Thanks,
Jimbo
Please tell me more!!! I have my first service app. in about a week, and I suppose I should wait till then before I do anything radical (that is, what they won't approve of) to my Bonneville, but I really do want to improve at least the sound of it for now.
So what ever you suggest will be a help to me.
Thanks,
Jimbo
jimbo
Member
Okay, here's what I did. I got my new T100 with the stock exhaust. I tried doing the bafflectomy about two weeks ago and I burnt out three 1 1/4" hole saws (according to the instructions I found online) trying. Turns out 1 1/4" is too big a dia. saw to use in these. Last week I tried a 1 1/8" saw and it went right through. After much more drilling and yanking and sweat, I got the pipe out and all the baffle material and what have you.
I started the engine and almost went into a panic attack. IT WOULDN'T RUN!!! It sputtered and spit and popped and gurgled. I shut it off after about 10 seconds of revving. Persistent S.O.B. that I am I started it again. Same thing. Again, a little better maybe, but I wasn't sure. Tried again and revved it for maybe 30 seconds. It actually sounded better(??). Started it again and raised the idle so it would stall and let it run. Viola. It straightened it self out! Turned down the idle and took it for a ride and it was fine ever since. With the low growling sound that I was looking for, and it was nearly free (except for a few burnt nerves of mine).
What does anybody think? Is this typical? Is this what usually happens on an EFI type engine?
Not sure if this is typical for your bike but normally when you do any pipe mods you need to do a tune for it as well
Agreed.
Exhaust and fuel work in concert for best (average) performance so if you open up the exhaust you should retune the fuel system.
Yes, EFI's have a certain window that it can adjust to whatever air / fuel ratio is desired by the ECU.
Depending on what you do to the bike, how much you change the 'breathing' - the EFI will so it's best to adjust to the target set by the ECU. However when you make a change that goes outside of the window, the EFI cannot adjust enough (or fully).
I would do the 12 minute tune, to allow it to settle. (It's on this forum)
Keep an eye for running too lean (see if your pipes change colour near the headers).
If it's all okay, I would ask for a TORS tune at your next service, it'll richen it up a tad for a 'more open' exhaust system - this will allow the EFI to sit more to the middle of the operating window. Possibly adding a bit more ooomph too.
hth
...
Depending on what you do to the bike, how much you change the 'breathing' - the EFI will so it's best to adjust to the target set by the ECU. However when you make a change that goes outside of the window, the EFI cannot adjust enough (or fully).
I would do the 12 minute tune, to allow it to settle. (It's on this forum)
Keep an eye for running too lean (see if your pipes change colour near the headers).
If it's all okay, I would ask for a TORS tune at your next service, it'll richen it up a tad for a 'more open' exhaust system - this will allow the EFI to sit more to the middle of the operating window. Possibly adding a bit more ooomph too.
hth
...
devo
hairy old fart
Show me any of the 790 or 860 twins,carbed or efi, with no blueing,and I'll show you a bike thats not been ridden.
