| Author | Message | ||
     Its_a_buell |
ok, i know these machines are pretty awesome from the factory. add the race kit, which i have, and they get a little better. but what i really want is MORE! the engine is probly due for an overhaul and if im gonna spend the bread, i'd like to really get some more out of it. what about a big bore kit. what options are there? or what about aftermarket cams, heads (porting/polishing), cranks, pistons. i mean there's got to be MORE! please help! i want more tire roasting, wheel standing, ear shattering power! | ||
| Jmr1283 |
call nrhs performance.com ask for dan. whats ur budget? | ||
| Its_a_buell |
im gonna put around $1500 aside for the upgrades so what ive found on that website is well within that range. thats a pretty awesome resource. i like the sounds of the stage 2 "light" head work and the SE 536 cams to start with. im not sure how it will mesh with the factory race kit though. any word from you experienced wrenches? | ||
| Jmr1283 |
Id go for 1050cc stage 2 standard $1475. then next year you can match a cam to it. but thats just for the engine. youll need to plan to get more fuel into it. so thats some more $$ but not to much. | ||
| V74 |
se 536 cams are a backward step for an XB | ||
| Its_a_buell |
more questions. first of all, my engine has around 25K miles on it. adding all of this extra power to the top end isnt gonna be bad for my aged bottom end? i really dont wanna rebuild both so i dont wanna add too much power. what can i do to add more fuel? larger injectors? i need somthing bolt on, not reprogramming the ecm. ive tried reading threads covering ecmspy and what not but thats way over my head. V74, explain what you mean by backwards? and does that make it non-compatible. my limited experience and research leads me to believe they are compatible. | ||
| Jmr1283 |
http://www.badweatherbikers.com/buell/messages/21/ 516332.html?1259153937 here u go 1050cc 9 motor built right. this is what i look for when building a motor. i find used stuff, like my 99" sportster engine. get that checked out, freshened up, u have a runner. | ||
| V74 |
se 539 cams have .536 lift, XB cams have .551 lift, you would get less lift if you used the se 536 cams, i would rather put high ratio roller rockers in,if i had an XB9 and money i would put the high ratio rockers on the intake side as the exhaust side is not to far of right - stock(have said this before - i cant understand why some insist on putting in same exhaust/intake lift products in a buell,its a buell not a harley and the XB9 revs higher making this more relevent,check out air cooled ducati v-twin cam lift),this would up your lift by about 1mm,depending on manufacturer of the rockers, | ||
| V74 |
forgot to say ducati "two valve"(per head) air-cooled v-twins | ||
| Its_a_buell |
V74, youve opened up a whole new can of worms for me but i like it. let me see if i got it, the XB9 exhaust valve and related hardware is at near optimum from the factory so to invest the money properly i should modify the intake side, correct? and it sounds like you recommend adding roller rockers instead of a cam? by modifying the lifter i could gain about 1mm of lift on the intake? my bud has a ducati monster. keep bringin the info and advice brah, i love it. | ||
| V74 |
hi alan,thanks for not dismissing my ideas, i have had my M2 new since 1999,i have read loads in battle2win and on various buell websites,when i first posted my ideas on here i got a few negative comments,then someone finally posted saying "you are right",i am not an engineer but know a thing or two about engines and always willing to find out more,having digested whats been written i came up with my ideas,some on here have slapped in bigger lift cams and lost power,some have slapped in bigger valves and lost power,more is not always better,over camming has to be compensated for by doing a lot of other things to the engine which results in lost reliability and great expense,Jmr1283 is spot on the money,drop on a 1050 big bore kit,this should add about 5bhp,while apart smooth(not mirror polish)the inside of the intake manifold,drop in some light weight push-rods,and try a set of high ratio roller rockers,first on the intake side then on both the intake and exhaust,to compare the difference(checking rocker box clearance),total gain should be about 8bhp at the rear wheel and stronger through out the rev range with no holes in the power/torque curve and without any reliability problems,a port job should bring the total gain to about 10-12 rwhp as long as the fuel and timing are set up on a dyno by someone who knows what they are doing(buell wise that is)let me know what you think and end up doing and the results you get, steve | ||
| Its_a_buell |
steve, anyone who brings more knowledge and experience to the table usually gets the deserved respect from me, and their ideas do as well. i like the info you present because it seems simplified rather than a lot of micro-measurements and lift and duration and lobes and pitch and degrees and what not. all that is good for some but im into simple horsepower and i dont want to extend my college career to get it. heres what ive got in mind as we speak (all of this will be on top of the buell race kit ive already got). a 1050cc standard kit which includes some worked heads. rather than cams, i will try the high ratio rockers on the intake side to begin with as you recommend. although this is still a couple months away i want to do plenty of research and hear plenty of ideas...any ideas as long as they dont drastically reduce reliability. a fellow bueller even mentioned using an XB12 crank and connecting rod set-up to gain more cc. im not sure about the compatibility of the two but if im not mistaken, isnt the stroke the only diff between the 9 and 12. so that leads a wondering mind like me to believe it could be done. whatcha think about that guys? keep it coming | ||
| V74 |
the diff are stroke and the primary drive ratio,some XB12 owners swap to the 9 primary, i have seen some posts on here where its been done(do a search)i think you have to be careful of the year of the donor crank,keeping the 9,s pistons ups the compression ratio big time, (if i had the cash i would be interested in fitting an XB12 crank in my M2 but the machining would be the big thing) if your up for splitting the cases then go ahead but i would rather just go with the 1050 kit and a few other mods, with the 12 crank you will gain a few hp and more torque but lose rpm, | ||
| Its_a_buell |
yea im really not that stoked about splitting the cases right now. i'd like to stick with the top end, but it's a thought for later down the road. i dont want to bite off more than i can chew and destroy my bike so i will take it one thing at a time. thats about all the questions i have until i actually get the parts and tear into and you can bet i'll be looking you up then. you've been a big help steve. stick around cuz im sure i'll be calling on you. thanks again brah |
