| Author | Message | ||
     Buelliedan |
As some of you XB owners probably have found out there is next to no selection of performance cams available for your XB except for the Redshifts which are extremely expensive and require lots of mods to use them. To combat this I have had some custom cams made for 2007 and under Buell XBs that are priced cheaper than even stock cams and will bolt right in using your stock heads, lifters pushrods, etc. I do not want to advertise here so if you are interested just call me at 303-702-1600 thanks Dan (Message edited by buelliedan on March 12, 2013) | ||
| Xoptimizedrsx |
you can use Sportster cams. We have done it many times. I have a pdf of how to do the base install. You will need to adjust the ecms timing to match the curve pattern of the cams you choose. Other than that it is very straight forward on what to do. | ||
| Rageonthedl |
Hey can you send me that pdf id like to see it | ||
| Buelliedan |
My XB cams are actually cheaper than Sportster performance cams and are already marked properly for XB's so you do not have to go through all the hassle of indexing them. So why would you want Sportster cams? This was why I had the cams custom made so it is a simple drop in install. (Message edited by buelliedan on March 13, 2013) | ||
| Teeps |
How much more can be had with alternate cams and no other modifications? Need to see before and after data; proving a performance increase & dollar cost per hp. | ||
| Rotor |
XB stock cams have an agressive profile. You can't expect a lot of HP with other cams. You can only expect to ruin your cam bushings wither agressiver cams. they can't be changed later, when ruined | ||
| Xoptimizedrsx |
Alternate cams is not about more aggressive. its duration and lift. Its all about ratios. I have seen many lower profile less aggressive cams equal and beat the XB 551E cams. They work well but are noisy. where as a Se536 does quiet well with no noise and so on... Like many areas of any engine, less is more in many cases. Your not going to ruin your bushings, guides, seats springs,keepers,or ect done correctly. | ||
| Teeps |
Comparative dyno data does not lie; show me the numbers... | ||
| Greg_e |
And no matter what anyone thinks, it's nice to have alternative parts in case all other sources dry up. | ||
| Natexlh1000 |
I read that the lobe profiles on XB cams are different due to the beehive springs. I'm not sure how or why this would be. Any learned individuals care to chime in on this? | ||
| Ripdog28 |
Knowing a little about chevy engines, just because a cam has high lift does not make it more powerful. Having a 600hp Big Block with what would be considered a small cam (540 lift) proves that theory. Duration and lobe profile are the keys to a good performing engine. Also with the Behive springs, they just absorb the movement better which allows for different cam profiles to be used with less abuse on internals. | ||
| Greg_e |
The beehive provides a progressive spring rate which helps get the valve opening and softens the closing to do what Ripdog says above. | ||
| Xoptimizedrsx |
I agree with Ripdog as well. | ||
| Fast1075 |
The beehive springs also have better harmonics. | ||
| Buelliedan |
As said i am not a sponsor so if you want more info on these cams you can call or pm me. For folks asking for proof and such you might want to first learn who I am and then decide if I know what I am talking about.  | ||
| Ericz |
Your reputations is independent of the performance of the cams you offer. It would be nice for you to offer some sort of test results so people can have a better understanding of what they are investing in. | ||
| Hurricaneleah |
The natural frequency/spring rate of the beehive spring is variable with lift and is self damping, so it doesn't require an additional frictional damping winding with all of its additional mass/friction and prevents natural frequency induced fatigue failures of the spring. the beehive design also results in less sprung mass at the valve tip. The XB .550 lift cams big advantage is there was a tremendous amount of work that went into the cam lobe design to insure a stable valvetrain at high engine speeds. It is fairly short duration for a performance cam, and makes power via intake side timing and overlap (vs. a .536 SE grind for instance). As with all thing horsepower related, you have to treat and build the engine as an entire system....cams alone aren't the answer. | ||
| V74 |
love the above post, read it several times, got to agree with all that plus I learned a bit. cams cams cams Trojan reckons the standard xb cams are good for 110bhp so why change them? I have heard of a few putting in big cams then getting a big hole in the torque curve which then has to be dialed out by fueling and ignition changes which result in less than satisfactory power. I have a theory. put in some high ratio roller rockers but only on the intake side, leave the exhaust side alone. Buells are Buells not Harleys.why they have same lift and duration intake/exhaust cams is beyond me, this might be ok in a low revving Harley but Buells are revved harder. the number of times a Buell was reviewed in a magazine and the journalist said that it ran out of breath above 5000rpm got me thinking and researching. I believe that Buells are quite efficient on the exhaust side it's the intake side that needs more work. battle2win did a good article on putting big valves into a somewhat anemic S1WL with not good result, I think the same thing happens when big cams are just slung in with expectations of big hp. by putting the high ratio roller rockers just on the intake side this will increase lift by about 1mm and allow the engine to breath in better with no loss of torque from opening up the exhaust to much. comments??? | ||
| Splatter |
"For folks asking for proof and such you might want to first learn who I am and then decide if I know what I am talking about." Well I know who you are and I saw you posted overlap causes cams to bleed off compression and I also saw you posted 108 degree lobe centers are magic and all cam makers strive for it. Anyone who would say such stupid things probably shouldnt be bragging about how he knows what he's talking about with cams and he shouldnt be designing cams either. Just sayin. OBTW HurricaneLeah knows more about motors in his little finger than you'll ever know in your life but you don't see him bragging. People who truly know don't need to brag. |
