| Author | Message | ||
     Moxin |
There have been some talk over this before. But I guess I would need some reassurance or some alternative input on some of my questions. To begin with I have a 1125R ofc  , of which I am very happy to own and ride. But I really really want it to sound a little meaner than the boring "sleeper" stock muffler. I have looked at Remus, HR1 RIOT, Jardine and Saron. I am a little bit interested in the Saron as it have the same thinking as the Original Muffler which is positioned below the engine like the stock. But it looks far to jagged. My preference are Jardine, which I also would love to see you Youtube too . My Technician where I bought the Bike say that I shouldnt buy any modifications at all or it could possibly ruin my engine. "I would be better of waiting for a race tuner or something similar". If I have understood matter correctly the engine will go a little bit leaner with reduced backpressure and as the ECM is programmed with the stock muffler in mind the ECM cannot really compensate for a custom exhaust which could be dangerous for the engine in the longrun. Well I stumbled across the Remus Powerizer which some say would Lean the engine and some say would make it richer with a Slip-on Exhaust. Would you be able to buy a slipon like jardine anyway and still be within safe limits or could you buy the Powerizer to equal it out, or is it simply bogus? With this in mind and from my technician I got hold of a accesories parts broschure where you could buy the DDFI3 Race tuner but I guess I never can get my hands on that  . Suggestions? I hope I have made it somewhat clear to read. Cheers Buellers! | ||
| Chevycummins |
If the DDFI3 works the way it should then the ecm should compensate for more air flow and add more fuel to get the proper mixture. Your AFV should change if the muffler is flowing that much better. As far as the Race ecm from Buell, you need the race license to buy it. Or do you? My dealer seems clueless when it comes to performance parts. I usually just go in and give them a Buell part number and they order it. I wonder what kind of red flag comes up if they put in the part number for the race ecm. Could I slip one by them? | ||
| Zac4mac |
Buell Race parts don't show up in the system. That's the first "red flag". Z | ||
| Xb9 |
DDFI3 can only adjust the base maps globally with the AFV. That works great for a stock configuration. Once you change intake or exhaust, the changes needed to the stock maps are not linear or global(same % across the board). The DDFI3 does not compensate individual regions or cells, and once it adjusts to a new exhaust or intake, there will be rich spots and lean spots. The only place that will end up to be close to correct will be the closed loop learning area. You cannot get the Buell race tuners without a copy of your racing license faxed or emailed to the racing dept. There are alternative tuning methods..... (Message edited by xb9 on August 14, 2008) | ||
| 01xjbuell |
There are? I'm all ears, looking to fix how lean my bike was when it got dynoed... -Nick | ||
| Easyrider |
My 2 cents: I am Waiting for my Saron and my Remus. I will put them both on the dyno to see what power they deliver on which area and make complete fuel map for them. In both cases I will use the Race ECM from Buell, we will run this bike next year on the circuit. And prepare another one this winter for racing. I will post the dyno sheets here. In this stage I mapped the Race ECM with the stock air filter on the stock exhaust. The stock ECM is running very lean for this type of engine. This AF graph is a TPS position I believe it was 24 with the stock ECM.  Try to forget the AF values for the air-cooled engine, The 1125R likes a lot more fuel. I spend some time talking to a guy who is tuning 25 years Japanese and rotax engines he also develops dynos For a living and tunes bikers for racers. I learned a lot more about tuning high performance engines. For me it was a real eye opener. My bike runs 12 AF after 6000 revs and I still have the feeling it likes more. I also use a different air intake system on the dyno who simulates riding conditions for the air intake, only this makes a lot of difference to see on the AF graphs. Running a stock bike with a open pipe and filter can really take the operating time of the engine down. I would say you really hurt the engine. |
