| Author | Message | ||
     Cataract2 |
At a steady 70mph on the Motorway (Freeway) I am surprised that the fan would come on at all unless in very hot and humid weather. That might be it right there. I forgot to mention that the temp yesterday was 80F but the humidity was 75% and rising. So I have a feeling that part of it was that. Heck, when you get up to 80mph it feels warm at times rather than cooler. | ||
| Cruisin |
Tunes - should have followed Charlie and Chris and I. Charlie stopped for a sandwich and Chris and I continued over the Kangamangus. We did most of it at about 80. Had a blast getting caught in the one thunderstorm for the afternoon - high speeds on the Kang dries us out.  | ||
| Tunes |
Cataract2 - Right!! Pirelli Scorpion Sync!! I've heard very good reports about these tires... I'll try them on my next tire change... Thanks! Cruisin - I wanted to ride more but had commitments later in the day... I'm sure the Kang is a major hoot on da Buells... I'm also sure there will be another opportunity to ride with you and "the boys"  later... Thanks! | ||
| Rubdoggy |
Phantom5oh- If ya don't mind me askin', How much $American$ does that scoop come out to be? Shipping n all. Thx | ||
| 12bolt |
190+27=217 | ||
| Rubdoggy |
Thx 12bolt, Got one too, eh? | ||
| 12bolt |
Nope, just added up the price trojan listed a few posts up.  | ||
| Xb12burner |
Here's your sign....  (Message edited by XB12burner on June 29, 2005) | ||
| Rubdoggy |
Arrrrrrgh! Just call me Skippy... | ||
| Nadz |
I have a two theories- y'all tell me if I'm nuts or what... I understand the DDFI runs in Open Loop at speeds above 60, and doesn't listen to the O2 sensor very much (instead uses the AFV logic to meter fuell). So what if the engine was running a little lean (therefore hot), wouldn't that kick the fan on (even at highway speeds)? Or it could just be built into the ECM logic to spin the fan, and therefore lower the backpressure, allowing cooling air to flow over the rear head better? I'm only speculating, because it just doesn't seem like the fan should need to run when I'm already doing 80, doubly so for youse with the right-side scoop! So is it intentional? Anony? | ||
| Blake |
"I understand the DDFI runs in Open Loop at speeds above 60" Your understanding is mistaken. Speed does not enter the EFI equation. Throttle position and rpm govern which mode the EFI adopts, open, closed, or closed-learning. Backpressure? I think I know what you mean and yes, when the fan turns on it increases cooling airflow over the engine, even at 80 mph. Guys, your Buell XB has a state-of-the-art, ducted forced-air cooling system. . | ||
| Phantom5oh |
"Phantom5oh- If ya don't mind me askin', How much $American$ does that scoop come out to be? Shipping n all. Thx" No problem, the special low price was 125 EUR when I bought it, which comes out to about $150 USD, plus whatever shipping will be. I think its somewhere near $25 USD. I haven't gotten the scoop yet, but I did get a confirmation email with that price. | ||
| Trojan |
The price of the scoops to customers in the US is UK£106.38 plus shipping of UK£15. This equates to around US$190 and US$27 respectively. We don't use the Euro in England (and hope we never do!). We used to own the world once you know......... | ||
| Onebuell |
for a piece of CARBON fibber mcgee and molly? holy (&^*^ ! some one ripping off buelligans ! I like that scoop but I don't think it does much in terms of heat reduction. And I can't justify 200 smackers for that piece of whatever. I took off that plastic right side piece and that don't do nothing either. So I wrote a poem. Heat on the XB Seat. Feel it on the street. Heat is heat. Trapped by the frame and the seat. You can feel it on your knees and feet. Ain't dat neat? | ||
| Brucelee |
"I like that scoop but I don't think it does much in terms of heat reduction." You are incorrect! | ||
| Nadz |
Hi Blake, not tryin' to argue, but I was quoting to the following... Reference Material <--Is this data old? | ||
| Matty |
Nadz, The key to what you are referring is this header "General operating parameters for open and closed loop running." That chart gets you in the ballpark - the rest of the doc gets you into the turf Blake is talking about. The ecm has no idea how fast the bike is moving, nor does it matter. That's a great link, Thanks for posting it! | ||
| Onebuell |
lets see some temperature readings before scoop and after scoop , with stock plastic or without stock plastic. i think you are talking miniscule heat reduction. heat rises. the seat and the frame trap it and store it. i still think the scoop is a miniscule effect. | ||
| Phantom5oh |
Trojan, sorry about that, my mistake. I got your email with the pricing shortly after I had posted that.  Sorry. The Romans and the Greeks used to rule the world at one time too...  | ||
| M1combat |
"heat rises. the seat and the frame trap it and store it. " Not at speed... Keep in mind that the frame and swingarm are aluminum and "should" act as heat sinks as well. | ||
| Djkaplan |
Heat doesn't rise. If you heated the center of an iron plate, the heat wouldn't get to the top faster than the bottom. The constituents of air (except for nitogen to a degree), will expand and become less dense when heated. | ||
| M1combat |
"will expand and become less dense when heated." And will therefor be "lighter" than the less heated gas around it, causing it to rise... less dense gas rises compared to more dense gas  . At speed though, with a forced induction cooling system (for the air part anyway) the heated air will be extracted. The radiant heat (heat waves) however, will certainly cause the seat/tank/everything to get warm. The particle heat (hot air) will cause this too, but I think to a MUCH lesser extent. This is why I plan on buying some heat reflective high-temp adhesive matting to line the inner frame with when I pull the engine for it's first rebuild. this should also help keep the fuel cool and add a most likely imperceptible amount of power. Someone please correct me if I'm wrong. Particle vs. Wave physics . Neat stuff . Now all we need is an engine that runs on quantum leaps . Do NOT work on it before disconnecting the negative cable . (Message edited by m1combat on June 30, 2005) | ||
| Brucelee |
Apparently, there is sufficient heat reduction such that the thermostat is "fooled." It thinks the rear cylinder temp. is low enough such that the fan does not need to be called into play (at least on my bike). One cannot debate the term "miniscule," imprecise as it is. All that matters is that the change is temp is sufficient to keep the annoying fan off, which in my case, it is. So you all can take temp readings while I go riding in peace and quiet! "i think you are talking miniscule heat reduction. heat rises. the seat and the frame trap it and store it. i still think the scoop is a miniscule effect." (Message edited by brucelee on July 01, 2005) | ||
| Blake |
Nadz, I don't know if it is old or what, I just know that it is wrong. First, the ECM doesn't care about how fast the bike is moving, it only cares about engine speed (RPM). Secondly, can you find any stock geared XB that at 60 mph is running at 4,000 rpm in high gear? Answer... no. At 60 MPH an XB9 will be turning approximately 3,400 rpm and an XB12 will be turning around 3,100 rpm. Where's an anony when we need one? | ||
| Blake |
Nadz, That is indeed old information, from 2001. Not applicable to XB's. And still wrong in the speed range stated for any DDFI Buell. There are other gross inaccuracies in that paper. "An Oxygen sensor is a chemical generator. It is constantly making a comparison between the Oxygen inside the exhaust system and air outside the engine.' What is wrong with the above statement? Answer: The O2 sensor does no "comparing" whatsoever; it simply produces a voltage related to the amount of Oxygen in its local atmosphere (exhaust gasses). | ||
| Unibear12r |
According to my XB manual... The DDFI is in closed loop between idle and 5k rpm once the engine is at operating temp. and the throttle isn't being changed a lot. That's all the requirements. Idle is open loop, above 5k is open loop. At a steady cruse at close to 100 mph my XB12 should still be closed loop. | ||
| Opto |
I can confirm that at a steady cruise at 90 mph an XB12 is still in closed loop. There are other gross inaccuracies in that paper. "An Oxygen sensor is a chemical generator. It is constantly making a comparison between the Oxygen inside the exhaust system and air outside the engine.' What is wrong with the above statement? Answer: The O2 sensor does no "comparing" whatsoever; it simply produces a voltage related to the amount of Oxygen in its local atmosphere (exhaust gasses). Blake you really put your foot in your mouth this time | ||
| Madsx |
Hey Ryan any daylight pics or more reports about the new scoop? No pressure. Looks good in the dark bet its better during the day.  | ||
| Ponytail |
I just got my scoop in the mail today. I MIGHT have it installed this weekend. Stay tuned. | ||
| Cataract2 |
Hey Ryan any daylight pics or more reports about the new scoop? No pressure. Looks good in the dark bet its better during the day. Yeah, I got some, just been working the last 2 days. I'll upload them once I get back from the gym. |
