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22/42 I44/20 E244 D244 D.575 L.575 L.200 TDC.187 TDCSpecs on the 777...
I think the 555 works well with stock flow heads. Im not a profesional but Im going to have to say you wont see much gain going from a 555 to a 777. Unless you have ported heads.
QuoteI think the 555 works well with stock flow heads. Im not a profesional but Im going to have to say you wont see much gain going from a 555 to a 777. Unless you have ported heads. Why is that many think you need ported heads for bigger cams?? While it's nice to utilize the higher lift to increases then flow to the motor. Increasing the duration and lift do the same thing as porting. They increase the flow.. On HDs it all about matching flow to the motor. If one were to set up a motor to run the 555 (say a 103) and installed a 777, it'd probably loose low end to get some up top. What would be nicer would be to bump the compression, use a little less flow heads (but still more under the flow/lift curve). In your case, if running a 107 kit without ported heads I'd bet that if you replaced the springs on stock heads to handle the increased lift and bumped the CR to keep the same CCP as the 555s that you make more power throughout the power band. Max
I'm surprised to read this from you Max. I thought you knew better.
I gained more on top just putting a pipe on my bike,
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