Cool beans!I seriously hope you are going to use at least E85 or ethanol or methanol for fuel on this build.Here are the reasons:you need extra engine cooling,you need fuel to help keep the mixture cool because you have no intercooler,you need high octane for the boosted compression ratio,you need high octane because you have no auto-retard for the ignition timing when it gets on the turbo. However, if you run a magneto with adjustable advance/retard, you could do it by hand with a handlebar mounted lever like they did in the old days.Good luck!.
It seems hard to believe today, but once upon a time the fastest motorcycle was a Royal Enfield. Edward Magner was a Swedish army engineer. He took part in the Isle of Man TT in 1928. In the Junior event, in spite of a bad crash and having to stop for 27 minutes to repair his bike, he finished sixteenth. Back in Sweden in 1929 he appeared on the ice in Edsviken with his 996CC OHV JAP-engined Royal Enfield sidecar rig, tuned by Robban Lindholm. He set a new world record on the flying kilometer at 110.63 mph. Then on Sunday March 9 1930,. he showed up on lake Storsjon with the same machine with a compressor. He had bad luck and the compressor blew during practice. Magner and Lindholm worked overnight to fix the bike (without compressor) and he set two world records, 117.48mph for the flying kilometer and 117.79 mph fror the flying mile. The record was in the Class G category (sidecar outfits up to 1000cc capacity). There is virtually no information about Magner out there in the internet, which is a bit of a shame.
I wonder if Scottie J has a lemon tree that he pees on everyday...
Scottie, are you independently wealthy or selling your kids?
When you mention the bottom end, you are getting into the other ploblem with the Enfield twins. The rocker piston oil pump puts out an adequate supply although a gear rotor type would be more efficient. The weak point is the oil feed plug. It doesn't do all that well at high rpm but can be modified to use a nylon or delron bobbin seal to replace the old rubber bobbin seal. This helps but you have to shim the thing perfectly to eliminate oil loss around the seal. Enfield Precision Engineers changed the design with the series II Interceptor but they used the same design that AMC/Norton used and they were also prone to failure but you can't take them out and check them like you can the old style oil feed plug & bobbin seal. You have to pull the whole timing cover off. With these antiquated systems, you never really know whether your getting a good supply of oil to the bottom end or not. You just have to say a prayer and go.
I think it's coolSometimes people just want to make something that they really want, and the time and effort and expense is worth it.All high performance builds are fraught with peril. It's part of the nature of pushing things to their limits."We shall overcome!"