Bladerunr said:
Looks like a rehash of conventional design to me
I don't know that I'd call it as simple as a "rehash" but yes, the goal was tokeep with an air-cooledV-Twin motor that is more current and better capable of performing at the sizes people desire nowadays while also improving performance using proven race industry ideas and still exceeding future EPA and California emissions standards.
Bladerunr said:
There are several changes made detailed in the articles and their site, give them a read. The most obvious right off the bat is the switch from 45 to 56.25 degrees to allow for more room for the fins (and everything else for that matter) which have become increasingly smaller over the years as the cylinderskeep growing (basically crowding them out). Another is the one piece
forged crankshafts and plain bearings used lessening the number of moving parts and increasing the amount of load capable of being handled with the added strength. Some of the changes like those were automotive inspired from Formula One and have been implemented in drag racing as well. Larger pushrod tubes like the Warrior improve oil flow and crankcase preasure but the rods themself are one-piece non-adjustable which is supposedly another improvement and vibration and noise killer. There are several significant changes compared to the standard piston design as well and the combustion chamber configuration is entirely different to provide several advantages including less noise and vibration againbut alsobetter efficiency and reliability.
I don't think anyone at S&S is claiming all of these changes are completely revolutionary and being used for the first time (because they aren't) but it's the first motorcycle motor that has implemented all of them in one family of motors that eliminate most of the restrictions that plauged and limited the standard air-cooled v-twin design from the past. S&S made performance replacement parts for years before making performance engines so it makes sense that they would be the one to incorporate all that engineeringand come up with the next generation motor I guess.
What I'D still like to know though, is how it really does and what are the shortcomings and pitfalls of it. You know it has some, everything does. I just want to know what they are so I can weigh the pros and cons BEFORE I spend the dough on it.