Lean will cause loss of power.
Not enough compression ? (more=Power)
Just a cam change MIGHT help. The intake close on a stock cam is 30*
(newer TC motors)
Going Later in intake close (bigger close number) will Lower compression= less power.
Going Earlier on intake close (smaller close number) will Raise compression=More power
It IS Just that simple to understand AND WHAT I just said is a good way to look/judge a cam change IF you only change out cams AND Nothing Else to compensate for the Compression losses of a Big Number Cam (Late Intake Close)
If you do need to get a Big Cam (later clos intake) , Then you will need BIG changes to the Heads and or High compression pistons to make up for the drop of POWER...
The RPM is something I had Full Control of on my early TC bikes. HI4??? you know the old electrical units for tweeking the different programs they used internally.
I find NO use for raising the RPM on a HD as they won't last long turning Higher than the FIRST rev-limiter allows.
Some good cams are available for Early intake closing.
I use the SE255 cams. (550 lifts) intake close at 25*
Others out there that are close to UNDER the 30* intake close of stock: Andrews 48H @ 29*..... SnS 551 @19*..... SnS 557 @ 27* are the Most available and DO a good job as JUST a CAM with NOTHING else doing to the Inner Motor Parts to make Power.
The above cams will make low end Torque at Lower RPM's. IF you want HIGH RPM,,,,, That becomes a whole New Ball Park... Just going the opposite and adding many more $$$$$$$$$$ will get you there.
signed....BUBBIE
