They look too nice to put in a motor. Are they cast of forged?
Cheers
Don't know yet, they are hopefully on their way from the old country, due in later in Jan.
But they are certainly extremely sexy
As someone with hi comp experience do you think a thick flange motor would need through bolting to run these?
They would certainly take the motor to the cusp of what BSA ever supplied to the public, while remaining a 650.
I could potentially run these at a demonstration meeting run by the car boys in mid March to see whether the motor will hold together.
The side on photo on flea bay showed one piece cast iron oil scraper rings, which I don't like. Will be looking to fly cut the pistons to clear the crank (as short rod) and recheck balance as well as get some 3/4 piece oil scraper rings.
I recall (must find) that period Eddie Dow literature recommended the slightly milder 356 cam when using methanol and 14:1 for optimal performance, I've also got a 358 grind I could throw into the mix.
I'll post the underside pics off fleabay