Brad, your typo "Porche' reminds me of a local FL mechanic that used the same spelling on his building, where he listed all the car brands he was willing to work-upon. He used the same spelling, and it stayed that way for years. He never corrected it, and not surprisingly, I never saw a 'Porche' in there being serviced. This past year, the shop finally went out of business.
I have an interesting story about the H-D outsourcing of engine design. Back in the 1970's they decided to look at better designs and they started two programs. One was a water-cooled modular engine they were planning to make in either v-twin, V-4 or V-6 designs, cylinders in a traditional forward-backwards design, crankshaft positioned transversely across the bike. The engineering was done by Porsche, it was the stillborn 'NOVA' project. AMF was the owner, and they dallied-around quite a few years, experimenting with running prototypes and static full-size models.
The other engine was a new design, a traditional air-cooled V-twin engine, done-in-house.
By now it was into the 1980's and AMF agreed to sell the company to a consortium of employees, who barely were able to scrape-together the $$$$ to purchase it from AMF. "Now what do we do?" They decided to bet the farm on a new engine, and they chose the in-house design over the Porsche-NOVA modular. That engine was the 'blockhead,' the H-D Evolution which I believe was first released in 1984. The NOVA became a never brought to market design, and you can see examples of the modular engines in the Milwaukee H-D Museum today. There are V-twins, V-4's and V-6's with different side cases, all looking promising in their concept, but now, a part of H-D history. last time I was at the museum, I got pics of all of them, and they even had a dresser mock-up with a V-4 which looks quite a bit like you-know-who.
Using an outside engineering firm for engines is a good way to take advantage of expertise in that organization. ILMOR designed an engine that became a Chevy in open-wheeled competition (Roger Penske used it at Indy for the 500, and won), and later Mercedes used a derivative of it for racing.
The Ricardo firm in England has done much work for many firms and has a long and storied history of engineering innovation, I believe Sir Harry Ricardo founded the firm in the 1920's.
Jack Roush Engineering has done work for Ford, and also for one of the prior owners of Indian. They developed a completely new engine, and guess what V-4 they bought and disassembled to inspect its method of engineering? Yes, our favorite! How do I know? I bought the disassembled engine from one of the employees. They were going to scrap it, and one of the people who had responsibility offered it to another employee who had a VMax, I bought it from him. He was a fuel systems specialist.
The V-Rod is probably close-to a full second in the quarter mile behind a decent VMax rider. Leave your VMax in fourth, and the V Rod will be very close to peaking at top speed when you're at redline. Then you shift to fifth...