| Author | Message | ||
     Briz31 |
Has anyone used this system ? What results have you experienced ? Is this worth while installing on your XB.. Regards 03-04 BUELL XB9 SERIES HB Motors -FAST- Full Air Supply Technology RACING Intake System ( # XBRS.9.FST ) FITS 03/04 XB9 SERIES / FOR 05 XB9 SERIES USE (#XBRS.12.FST) WINNER OF THE USERNAME=ENGISHMEN'S XB INTAKE SYSTEM SHOOTOUT @ BADWEATHERBIKERS.COM FOR RACING THIS SYSTEM ELIMINATES THE OEM FLOW RESTRICTIVE AIR BOX BILLET ALUMINUM CNC INTAKE MANIFOLD INCREASES EFFECTIVE INTAKE TRACT VOLUME FOR IMPROVED HIGH RPM TORQUE & HORSEPOWER HIGH TECH INSULATOR SEPARATES ENGINE COOLING AIR FROM INTAKE CHARGE SUPPLIED BY K&N EXTREME FILTERCHARGER K&N CRANKCASE BREATHER FILTER & (Y) FITTING INCLUDED ALSO AVAILABLE FOR05 XB9 & 04/05 XB12 SERIES (PART #XBRS.12.FST)  | ||
| Hkwan |
Hey, that's what I got in the 12r. | ||
| Briz31 |
Hkwan... Are they any good ? easy to install ? my XB9s is still stock standard.. looking at installing one of these, then add a Techlusion followed by a race exhaust system (haven't decided on which) any advice on which system... | ||
| Hkwan |
Real easy to install. It has to work with some type of race exhaust and the race ECM. The set up would smooth out the torque curve even more. Yeah it is good, but you'll need to do the whole system to make it worth it. | ||
| Firebolt020283  |
http://www.badweatherbikers.com/cgibin/discus/discus.cgi heres the test the add is refering to, englishmans test came out that it had a 6 hp gain on his 9 (Message edited by firebolt020283 on December 07, 2004) | ||
| Buellgator  |
I love mine on the XB10. Best air filter system you can get if you are going to drop the cash. Also Cory over at IronMachine is easy to deal with and really cool. | ||
| Dcmortalcoil |
Hkwan, Do you also have the K&N breather filter? If so, where is it located (what's the filter and connecting tube size). A picture preferable if you have it. | ||
| Hkwan |
Yeah, I do. I'd need to take a pic on that. The location is actually right next to the K&N air filter. The "Y" sticks out of the heat mat and the breather filter gets installed onto that. For some reason I don't see an opening (precut with metal conduit around the hole) for that in the picture shown here. | ||
| Dscak |
Hkwan, That's because the one depicted is one of the original version from Hillbilly Motors. The ones with the opening for the breather "Y" tube are ones which were an improvement by Cory at Ironmachine. Dan | ||
| Englishman119  |
Yes, Corey at Ironmachine has made the "what to do with the breather pipes" question go away. I put mine into a catch can under the seat. 119 | ||
| Dcmortalcoil |
Englishman, How did you route the tube to go under the seat. I have a S version, and there is no room whatsoever to allow a 3/8" ID tube to sneak beside the wire harness. Please load pictures if you can. | ||
| Englishman119 |
Does this help ?.  Their tucked under the sub-frame Mark. | ||
| Fullpower  |
you are telling us that that tiny little k&n filter flows MORE air then the factory filter with 3 times the surface area? maybe i am mistaken, but from the scale of the photo, it looks about the size of the filter on my honda XL125. you say some one got 6 more horsepower by putting a smaller air filter and a heat blanket on??? what critical piece of information am i missing here? | ||
| Hkwan |
Fullpower, I believe the K&N filter eliminates the airbox therefore it gives the system less restriction. The top of the K&N is also open, though, you can't see that too well in the picture. In addition, the element of the K&N flows lots more air than the factory's. I think this is the most important factor. | ||
| Fullpower |
more air? what does it do, use a greater quantity of smaller air particles?sorry if i am apearing argumentative, i wish not to be a jerk, but i am failing to grasp the mechanism by which a smaller filter can flow more air. please, and i mean this honestly, explain how this works. thank you. dean | ||
| Hkwan |
Dean, go on K&N website. | ||
| Jerseyguy  |
Variations on this theme feel like they would flow better IMHO. The heat shield is probably a good idea.  | ||
| Hogs |
I wd. agree Jerseyguy & you as well Fullpower ... I bet if you run the fast system up with a stock k&N air filter and open air box as u have and I as well the numbers wd. be the same or who knows maybe 1 hp. either way... all other items being the same , I`ll do my own mods. myself more fun... | ||
| Englishman119 |
Fullpower - As others stated, its removing the air box that gives you the HP. There are many ways to make the XB breath better. FAST also works on the cooler air induction side as well. I was going to do more on this whole subject, I just ran out of time. Jerseyman - Nice looking system - Do you have the self adheasive heat shield on the air box lower ? Mark | ||
| Fullpower |
i have studied K&N literature, and they do give some comparative data, along with formulae for air flow vs. filter area. i did not find any reference to , nor claims of reduced filter area flowing more air, or rendering less restriction to airflow.the stock xb filter has 75 square inches of surface area, (not counting the convolutions, or pleats) the filter shown in the fast picture looks about one third the size. K&N make good filters, i run them on my XB, sportster, pickup truck, etc. but they are not magic, they still have to flow the same molecules and the same parameters apply. | ||
| Hkwan |
Full, no one has mentioned reducing filter area can increase the flow of air except you so don't get too stuck on that idea. I'm sure you have read from their site regarding the filter element having to do with increased airflow over stock as well. If you really want to convince yourself, you can install the air flow sensor at the inlet and take data for both filters and compare. It is what it is, right? Now, if you just want to argue for argument sake, well then, can't help you. Sorry. | ||
| Alex |
Fullpower, the FAST air filter doesnīt flow more air than the Buell race filter as that one is a K&N as well. But the FAST system flows more air than the stock airbox with race filter. The one who told me that was my buddy. His name is Superflow SF 600. The FAST system is capable of flowing more air than any stock head can handle. We developed the system to be used with our ported heads. The idea behind the FAST system is the removal of the restrictive stock airbox not the use of a K&N filter element. I hope no one minds me to say that this idea - removing the restrictive air box - was the beginning of all the "swiss cheesing" and cutting of the stock airboxes thatīs all around now. Best regards Alex M-TeK Engineering | ||
| Jerseyguy |
English - No I haven't. Do you know where I can find that heat shield film. I'm planning to pull it all apart soon to check for the wire chafing discussed in other threads. It would be a good time to add a heat shield then. | ||
| Jerseyguy |
Alex - I spent a lot of time pondering and experimenting with the shape of the inlet of the velocity stack. My copy of the rubber stack in aluminum does little to improve performance. We do know that the 12's nipple does improve performance. It appears that your stack provides a nice mount for the K&N but has no trumpet end. I was just wondering what your thoughts were on the design. | ||
| M1combat  |
Fullpower is correct IMO. The area inside the filter should be at LEAST 1.5 times the volume of a cylinder. I would imagine that having a K&N element would reduce the volume needed by the same percentage that the K&N element flows per square inch better than the "average" stock filter. It's not just about overall flow of the filter. It's also about intake tract pulses. A smaller filter will make the negative portion of the wave slightly more pronounced as I recall. I had some trouble with an old CB-750F SS I used to own. I took the airbox off and added four K&N's that attach to the carburetor. From then on, it wouldn't run quite right. I messed with the jetting for about a year to make it work and finally got it to where it was "decent". I finally went back to the original airbox and it was good again. There wasn't enough volume in each filter for each cylinder. | ||
| Dscak |
FP, as you know I have an XB12S, similar to yours. I currently have the FAST intake on it, as supplied by Ironmachine. The mods are only race ecm, drummer, and snorkle removed. With the 12 airbox and race filter, hp and torque are essentially the same as with the FAST intake. I don't have the dyno sheets here with me, but the difference is small enough to be attributable to differing weather conditions, etc. As I recall; however, the AF values seem to be more constant with the FAST system. I'm not sure what the answer is to obtain a say 10% increase in power on the 12, without substantial modification, but, to date, the only accomplishment with the current modifications is removal of the dips in the midrange of both the torque and hp curves. It seems to make the bike more responsive in the range where I ride, but, as always, YMMV. Dan | ||
| Opto |
The FAST system has the IAT sensor under the blanket doesn't it, where the air is hotter? My thoughts on why HB motors found this to be the best location: Once the engine is warmed up and running in closed loop, the ecm injects the usual amount of fuel based on rpm, TPS, and IAT which will now be a bit warmer than ambient (because it's now near the cyl heads), so the ecm will initially run the engine a bit leaner than before but the O2 sensor will report the lean condition and the ecm will adjust the mixture back to stoich (14.7 to 1). After the ecm "learns" this new condition, the AFV will change and richen up the mixture in open-loop conditions, like when you're on the gas or on the dyno at WOT. Hence the "removal of the dips in the midrange" and more power on the dyno (in conjunction with the rest of the FAST kit). Just food for thought... | ||
| Alex |
Jersey, the XB9 FAST intake stack implies no hidden secret. I feel that the shape of a stack is of minor importance as long as it is not restrictive. Yet donīt get fooled. Some people report to have found more midrange torque or whatsoever by using a different stack design. Mostly by changing the stackīs shape they changed the stackīs length as well. The stackīs length indeed is a big deal. We speak of "intake tract length tuning". So You might try using different length stacks instead of different shapes. Let me know what You will find. Best regards Alex M-TeK Engineering | ||
| Hkwan |
Opto, sensor is above the blanket. There is a conduit that you plug into on the blanket. Pretty smart design. | ||
| Fed |
i have the F.A.S.T. system and pleased with the performance.revs quicker from 4k to 7k hits rev limiter real fast.....   |
