| Author | Message | ||
     Froggy |
The factory prototype turbo XB9's that never made it into production due to Harley were in that ballpark of power and street reliable (several 10k mile test bikes). I do agree going way beyond 100hp quickly enters the expensive and fragile stage, as evidenced by the raced hard XBRR, which ultimately led to changes on the productions bike including the beefier crank and oiling system. | ||
| Bads1 |
FROGGY they were also low compression engine's. Erik told us they were very tame but once into boost they were all ball's out. Reliable though he said it was. He still has one BTW. | ||
| Xxxue |
I built a 100 hp sportster engine back in the 90's with the best parts you could get at the time, branch heads, andrews cams, balanced crank, stronger rods and bearings. While the motor and transmission held up, the weak link was the clutch , primary drive and alternator system. It turned out that when ever the motor was reved to high the clutch basket would flex a lot and the ceramic magnets that were glued to the back of the clutch basket either flew off or hit the alternator, destroying the alternator windings and even jamming up the primary drive. Turned out harley knew about the problem and the fix was to use a thicker washer from an older KHK motor and they finally switched to a early triumph style crank mounted alternator for the devolution design. (Message edited by xxxue on January 07, 2013) | ||
| Ericz |
Can we keep this discussion going but not get sidetracked? Xxxue, I appreciate your concern and I am well aware of the possibility of mechanical failure. Please know that, while there are lots of stories on the net about failed attempts at big power, I have also seen lots of stories of success for those who have executed systematic upgrades and have planned ahead. The "weakest link" is inherent of every mechanical system and every builder must prioritize their goals with this in mind. It would behoove you to balance your negativity with, at least, a small expression of encouragement. I have accomplished a lot with my Buell and none of it was a result of an "it won't work" approach. | ||
| Fast1075 |
Success lives at the intersection of planning and execution. Being a jaded old man I don't impress easily. I AM impressed. The thought and obvious understanding, not to even mention outstanding fabrication skills shows the level of execution. Carry on. | ||
| H2opatrol |
Ok, so some squids threw a huge turbo on a stock motor and it grenaded. Whoopity doo. These stock engines aren't reliable much past 100hp. Laa dee dah. You built a 100 horse sportster mill 20 years ago and the technology of the day couldn't get it to the wheel. Congratulations. Have you been following along here? I challenge you to find a variable or weak link that this guy hasn't at least taken preventative steps to work around or completely made bullet proof. This kind of ingenuity and out of the box thinking is what put us all on these bikes in the first place. | ||
| Xxxue |
The sportster and buell engines have changed very little from the first evolution engines of the late 80's . Improvements have been very minor, most significant changes have been the relocation of the charging system to the crank, 5 speed transmission, belt drive, improved head porting and a lightened crank for the buell and different cutting on the tranny gears for better shifting on the buells. Taken as a whole they may be significant to some ppl. But judging from a performance level they are all minor improvements, for an engine that has been out for 22yrs. Buells big improvements were in the suspension and frame designs Buell introduced. (Message edited by xxxue on January 08, 2013) | ||
| Kdogshirow |
Yawn... Why are you on this forum Xxxue ?  | ||
| H2opatrol |
Dad was wrong, you really CAN argue with an idiot. Anyway, are there going to be any more videos? Are you still planning on REALLY turning the wick up on this thing? I saw the chain conversion, where is the gearing in relation to stock? Again, great work and excellent read. | ||
| Ducxl |
That idiot is arguing the laws of physics which cannot be broken.I REAALY wish Eric success.But this 45 degree twin can only be improved with 90 degrees.His cases are now the weak point.I WISH MY 89 incher were a success but IT broke repeatedly.So I went to a 90 degree OVERENGINEERED twin build with complete success.I'll never attempt another Harley twin again. BEST of luck in your endeavor Eric.I don't know of ANY successful builds of this nature. | ||
| Ericz |
There will be more videos soon. I'm looking into a new Gopro Hero 3. Will be working over the next few weeks to get something together. I may shoot for 15psi in a couple weekends but I think the 20psi mark won't be for another month or so. I have lots going on and I want to take my time getting there. The primary drive is the stock 38/57 or 1.5 ratio. The factory trans ratios are as follows: 1st--2.69 2nd--1.85 3rd--1.43 4th--1.18 5th--1.00 The new Andrews gear ratios are: 1st--2.78 2nd--1.87 3rd--1.48 4th--1.21 5th--1.00 And I am currently running a 21/44 or 2.09 final drive ratio. I'm thinking of changing to a 20/45 or 2.25 ratio since I am working the clutch more than I want in 10-15mph school zone riding. It's currently geared great for everything else and I really don't want to gear it lower but the stiff clutch offers quite a workout  | ||
| Ducxl |
Andrews gears are a great choice.I spent an entire Winter fitting/re-fitting them. Robust. | ||
| Kdogshirow |
A Ducati enthusiast/rider critiquing a Buell forum thread ...... Hmmm ..... Do any of these critics even have Buells or interest in them other than bashing ? | ||
| Ducxl |
I HAVE TWO SUPERB BUELLS! My expectations are realistic.I absolutely LOVE my machines. I love this thread despite the fact this machine isn't Engineered for Eric's expectations. | ||
| Glitch |
Xxxue let's not go through this again | ||
| Ericz |
Here is a short accel from my new GoPro Hero 3. Learning how to get good shots with the chest mount. I may try a helmet mount setup for a better view. Gear-based boost mapping is giving me a fit. This shows 8psi in first gear and 11psi in 2nd-5th. I need to redesign the switch assemblies and will do so over the next few weeks. Enjoy! http://www.youtube.com/watch?v=XrayyJoyd1o&list=UU Ji14ZLGXBzWIC9uMN7bgMA&index=1 | ||
| Glitch |
Now that is just bad ass! | ||
| Rageonthedl |
Yes please!! What kind of tach/shift light is that? | ||
| Ericz |
It is lots of fun! It is an Autometer Z-series 2-1/16" tachometer but there is no shift light. The only lights I have are Neutral, Oil Pressure, Check engine, and Low fuel. | ||
| Rageonthedl |
Sorry in the older video you had a tach/shift light combo. | ||
| H2opatrol |
Wow.... | ||
| Greg_e |
Is that a waste gate we hear "chuffing" with every shift? | ||
| Ericz |
The sound between shifts is the blow off valve. The wastegate is a part of the exhaust system and you can't hear it operating. | ||
| Xb9er |
I want that! I wonder if one could do a similar setup on a blast? | ||
| Ericz |
Another short clip. I tried the GoPro handlebar mount but it vibrates a lot! I think I'm gonna try the chest mount again with some different brackets to position the camera a bit higher. http://www.youtube.com/watch?v=PD3x_ag8dW0&feature =youtu.be | ||
| Glitch |
Holy s#!t that's quick! I didn't think it was too awful shaky Man alive that's quick! | ||
| Ericz |
The rest of the 17 min of video I took was shaky though  . The chest mount is really the only way to go with a motor like ours. | ||
| Glitch |
Helmet mount will do the trick, if you want it mounted on the bike, the forks are a good place, they have suspension built in. There was a video Matt made, but I don't know if it's still around though. I can't find it. I think he mounted it at the axle, in place of an axle slider. I'm really enjoying your project, I've been following ever since the first attempt. Thanks for sharing!  | ||
| No_rice |
The problem with harley engines is in the design, they usually can't be pushed to much over a 100 hp with out having crank and transmission failures. Your pushing horse power levels close to that used on stroked harley drag bikes and they are usually using S&S built motor and custom transmissions. i find this amusing. i mean granted i have only worked at the hd shop for around 8 years, but we have built TONS of motors putting out 110-120 horse and more then that torque and not had any i can remember come back because of a failure. a good portion of those people are regular customers of mine with 50,000+ on their motors since the builds. then there is my own nitrous infused xb... anyway, good to see you gaining some ground on this again Eric! hopefully you have this thing in one piece when i swing down through florida this fall and i can twist your arm into letting me take it for a spin  | ||
| Sifo |
I've had very good results with a fork mounted camera. I made a very simple bracket that I zip tied to the fork between the triple clamps. I hate the helmet mounted cameras. My head swivels way too much, and you don't get the sense of leaning when you keep your head upright. You cant see the gauges with a fork mount though. Any idea what your speed was in 5th gear in that video? If I recall, you aren't running stock gearing. I'm guessing that got up to pretty good speed very quickly though.  |
