| Author | Message | ||
     Nasaproject |
Hey all, So I am building a one off custom bobber. The engine I picked up for a real good price came from a 2000 M2 cyclone. I am interested in doing things in stages and want to make a little more HP/Torque. I already bought a EBR ECM, Scream'n Eagle Ignition coil, S&S shorty carb, jet kit, hypercharger running straight pipes. It has the thunder heads. I am looking at doing the 1250 kit but wanted to know what else I should do. Cams (Which ones), valve work, clutch, etc. Need some help trying to finish the build before bike week next year. Thanks | ||
| Jayvee |
I could be mistaken, but I'd suggest the EBR ECM may not work well with the straight pipes. Almost all the other options mentioned will find some adherants, and very likely a similar number of enthusiasts who will call them a waste of money (or worse). Observe, do your own research (search,and re-search), here, there, and everywhere, and do what YOU like. There's so many ways it can go, it helps to have your own 'vision', otherwise it's a bike-by-committee, that's not custom, right? | ||
| Phelan |
I don't believe EBR makes any ECMs for carb'd bikes. I would check and make sure it's not for an X1 or XB, as I'm almost 100% certain it won't work on that motor. Also, EBR ECMs are specifically calibrated for certain exhausts, and straight pipes were never one they calibrated for, as all Harley-powered Buells came from the factory with much, much better performing 2-1 exhausts. Straight pipes are likely to cost you about 7 HP alone. | ||
| Jayvee |
Of course they don't... that's why this will be a "one off" (Message edited by jayvee on November 25, 2014) | ||
| Hootowl |
An ECM will not help you with a carb'd bike. You should just pick up an aftermarket ignition module so you can adjust the spark curve to suit your build. | ||
| Catfish_ssffss |
If you decide to go with a 1250 kit, cams and head/valve work. I'd go with it all at the same time, plus carb and ignition. That is what I did, went to Hammer Performance. Haven't put my Buell together yet, but I had just their 1250 kit and cams on my sporty. And it made a world of difference. Goodluck! | ||
| Nasaproject |
From all my research i've done the big difference the EBR ECM over stock was the shift of the rev limiter. I installed one on my M2 cyclone and I noticed a difference. As far as the straight pipes, I am rejetting the carb to compensate for the HP loss and should get a little gain out of it if not at least have some good sound. Still trying to find out what you all recommend for the 1250 kit. What cams should I run, head work should i do, etc. | ||
| Catfish_ssffss |
I have the Hammer Performance 1250 kit matched to my XB heads that they ported and rebuilt "Crush" service, with their Jack-Hammer cams (.570), plus a Mikuni 45 and dyna 2000 ignition. | ||
| Phelan |
The carb jetting will compensate the air-fuel ratio, but the performance will still be lost. My -7 HP figure was assuming it is jetted correctly after the pipe change. You may not rev the bike high enough to notice the difference, but in the upper RPMS (4000 up) it is substantial. | ||
| Lakes |
I made more power with unbaffled tapered end duels , than with two into one ( harley motor ) also lost some very low rev Torque with duels compared to 2 into 1 , but from 3,500 the duels started to make more Torque & kept the torque up to higher revs than the 2 into 1, at the 1/4 mile trap speed was 12mph faster with unbaffled duels than with 2 into 1 everything was the same just pipe change. but on my buell i've got 2 into 1 as suits the bike they perform good on the Buell. was just talking about personal experience with harley motor ( all the same ) i've got a dyna 2000 adjustable mounted like stock i like it as less aggressive advance and runs less timing, so easy on bottom end. Lakes | ||
| Mcgiver |
Id be careful about raising the rev limit, as this can reduce the lifespan of the crank assy. Better to get the best street performance within your usable rpm range. At least it works for me! |
