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I have owned several Harley's over the years, but this is the first time I cammed one. Installed a CR-570II over the winter. Based on the dyno (below) from @fuelmoto it's exactly what I want. I had a chance yesterday to get out and get on it to see what it would do and it's just not there. Rolling on from a dead stop it's a dud, weaker than stock, nowhere near 100ftlb. Around 3600 I can feel the HP kicking in and I didn't get a chance to push harder than that in the 1/2 hour I rode.
I got a new tune from @fuelmoto and loaded it so what else should I check? The only other mechanical change is to a 24/51 chain drive but there is no chance that's responsible for what I am (not) feeling.
Finished everything up this morning and took it out for a shake down and it RIPS!!! Aggressive start and it lifts on 1st, 2nd, and 3rd!
Took it out with the wife (her on her '22 FXBBS) for about a hundred miles today. Beautiful weather and the bike is finally feeling dialed in. With the suspension tuning, cast rims, chain drive and the cam it's pretty perfect right now. Lots of power and the bike just wants to go! Bonus, no leaks or weeping anywhere AND the dreaded Thunderheader install went the best it ever has. The tip I got about setting the front header first, then swinging it up and into the rear is a life saver and it actually bolts up the way it should!
I don't have a new filter laying around so the oil change will have to wait till this coming week and then I plan on doing some auto-tune on top of FuelMoto's work. Maybe I'll even take it back for another dyno pull? Very much looking forward to it!
Thanks very much again to @Max Headflow and his keen eye for spotting that O-ring!
It looks like you have to spin the engine to 5300 rpm for max power. Most Harley owners run between 2500 rpm and 3500 rpm. You gained power with the cam switch, but it's all on the top end.
It looks like you have to spin the engine to 5300 rpm for max power. Most Harley owners run between 2500 rpm and 3500 rpm. You gained power with the cam switch, but it's all on the top end.
you need to look at the chart again, it's over 100ftlb at around 1750.
Do you have the specs sheet for the cams? Would like to know more about them before I make a statement.. Never used them.. I'm a tried and true Woods fan..
Your dyno chart looks very similar to mine with Andrews 48s. Believe me, with 100 ft/lbs at 2000 rpm you should feel like your arms are getting pulled out when you get on it. Something's not right. You may need to work some more with Fuel Moto.
Edit: I just realized that the dyno chart in your first post isn't your actual bike. Like rigidthumper said you might want to get it on a dynamometer and figure out what's going on.
Just took it out again for a harder rip. There is something wrong. It runs fine, no leaks, no excess clattering or noise, nothing unusual or alarming, it might be running a little rough under hard acceleration but that's it. There is just no power. Hit it hard from a dead stop and it was just ****, went around the corner and did it again and it felt like it was pulling harder than normal, got to the next corner and did it again and it felt like **** again. It is inconsistent and even when it is pulling it's not pulling like it should.
I know the cam and cam/crank alignment are good. Brand new tappets pumped up like they should, pushrods are adjusted to 20.5 turns, new bearings, and O-rings. If I nicked the O-ring on the oil pump or it slipped, could it be filling the crank case and causing this kind of behavior? I didn't mess with the clutch basket, it came out and went back in in one piece and it's not slipping. What else could I have missed?
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Not feeling it
