| Author | Message | ||
     Jaylightnin0666 |
So I am about to go get the tire put on that was so genorously given to me on here by hammer. Anyways I am running my bike without a muffler, just the open header. I hate being "that guy" but Its something I am going to have to do for just a little bit. Is running the open header going to hurt my bike if I am only doing it for say 100-200 miles?? Input greatly appreciated, thanks in advance Justun | ||
| Forerunner |
Ran mine w/an open header for several weeks with no issues. Prob not the best in terms of power unless you're tuned for it though. YMMV, Nels | ||
| 1_mike |
Learn "air fuel ratio"... Not a good thing to do without a healthy fuel map tuning. Mike | ||
| Ourdee |
I hate being "that guy" Well, you know my opinion. | ||
| Wolfridgerider |
you may melt the exhaust valves... or I should say... more than likely, you will waste the exhaust valves. to lean... to hot... | ||
| Forerunner |
So, just curious. Anyone actually have any examples of melted exhaust valves happening from open headers? Because if not, this is just speculation based on the assumption that the factory fuel mapping is so intolerant that a single change such as running an open header is enough that it cannot compensate and add enough fuel. Anyone toss an A/F gauge on an open header and show readings that are dangerously lean? Nels | ||
| Wolfridgerider |
i have long since deleted the pic of one of my fellow riders burnt valves .... but go ahead and roll the dice | ||
| Forerunner |
No rolling dice. Just simple questions. Did your fellow rider burn a valve by running a stock bike without a muffler? What was the bike? Were there no other causes that could lead to that condition? Are our bikes so finely tuned that simply removing the muffler can result in a condition lean enough to cause damage? If so, it's the only vehicle I'm aware of that is so intolerant of a single change. As I stated, I ran for several weeks without a muffler and no issues. Nels | ||
| Skinstains |
Why don't you just take the wheel off to swap the tire ? No risk to your bike and no-one will hate you for running open pipes like all the faggy harley guys. | ||
| Panhead_dan |
I did it for a short time on my 9. Sounded bad assed but much less power. It really sounded cool. | ||
| Firemanjim |
Fore---the problem with Buells is the learned fuel area--it is looking for 14.7 to 15-1 and if it sees richer or leaner than that it will skew the entire map,that is the problem with the open header.Not the open header itself causing the valves to burn---old wives tale. And you will have a hole in the power band that you could drive a truck through,there is a reason they are called "drag pipes". | ||
| Terrys1980 |
Jim that hole is the power band you speak of is bad. I ran my bike for a day w/ an open header and it sucked. Don't go trying to put out fast in traffic you might get leveled out! | ||
| Jaylightnin0666 |
didnt mean to start a fight, just wanted to get some answers, which I did so thanks guys. Once again, really appreciate the feed back. I have ecm spy but I am afraid of trying to tune my bike and completly frying the ecm. Im trying to learn how to use it, but without someone actually showing me my chances of figuring it out are between slim and none. Thanks again guys JUstun | ||
| Trojan |
assumption that the factory fuel mapping is so intolerant that a single change such as running an open header is enough that it cannot compensate and add enough fuel. That single change is actually pretty massive when it comes to exhaust length, back pressure and fuelling. It will also sound and perform like a tractor and alienate yet another large slice of the public towards motorcycles in general and Buell in particular. Not everyone thinks that an unsilenced V Twin is music to their ears, and I tend to agree if I'm trying to watch TV and some loon rides past the house with no muffler  | ||
| Forerunner |
Firemanjim, completely agree re: the power band which as I understated in my post "Prob not the best in terms of power unless you're tuned for it though." Trojan, I wasn't EVEN going to get into the decibel issue of this equation.  Just wanted to discuss the 'bad for the engine' part. Not performance, not noise level, just actual example of damage to the engine thereof. Nels | ||
| Cvc |
I think most things have been covered but if you need an inexpensive quick fix just have your local muffler shop bend 75 to 80 degree elbow and get a 1 3/4 in core 12in long glass-pack, a turn down tip and some steel strap hangers make sure to get the rubber insulators with the universal steel hangers double nut the hangers and clamps and for under $100 you have exhaust again. 18in long might also fit and larger diameter core but bigger core=louder, longer= quieter. I did this with a big twin slash cut muffler ($20 at Harley dismantler) turned side-ways on a Blast I told the shop what I was doing and they gave me the pipe free and the muffler got a $4.00 oooo stainless steel wool Home Depo repack, $8.00 T-bolt clamp and the shop gave me a ST-2 hanger . Good luck, CV |
