Check with your tuner and see what he likes to tune best. I like PCIIIusb and so's my tuner. Some like SERT. There'a a lot of different things out there.Sprags said:
I agree. HP is a worthless number for Harleys unless you are just interested in dyno shootouts or drag racing. TORQUE is what matters! High HP numbers don't come into play until above 5200 rpm. How often do you ride at such sustained high engine speeds? Not often, I'll bet. Try to shoot for the most torque in the idle to 4000 rpm range. That's where you need it on a street bike.YankeeBob said:With stock heads, you should be in the high 70's/low80's. With a mild street port, you should be approaching 90.
But get your mind off HP. Think torque, cause thats what you feel when you twist the wick.