Quote:
Originally Posted by grbrown  Scotty,
In actual fact that is the case with any tuning mods for any model of Harley! There is such a wide variety of options available, especially for Evos and TCs, plus umpteen specialist dealers to mix and match them, that there is no single answer to any tuning question.
On the original question, tuning of a Harley involves undoing the emissions related harm done to them, which could sensibly include replacement cams, revised ignition timing, improved EFI air/fuel ratio mapping, improved intake breathing and ditto exhaust. Don't forget also that overall gearing is way over the top and can beneficially be reduced to improve performance, especially on standard/mildly modified bikes. |
Graham, one of the things I am looking for is a sensible set of steps to improving the overall cruising speed of my streetbob. When I go over to Europe, I like to 'cruise' .. erm .. quickly ... and dont want to feel like I am taxing the engine too much. Recently I had a 34T front [rear belt drive] pulley fitted which has made a real difference, so really want to identify what my next step should be - I have a PCIII (professionally tuned), S&S (with a K&N element) and bigshots (with 'quiet baffles'). To try and maintain some kind of sensible mpg while increasing my cruising speed, looking for suggestions on a next sensible mod - cams?? learn to drive slower .. nah, lets keep with realistically achievable stuff
So, is it cams, bigger EFI body, closed loop system that Roger mentioned, I don't really understand what each of these changes would make. Can anyone help spell it out to a mechanical thicky?
Cheers, Roy